Neutrik - NBNC75BTU11 - rearTWIST HD 75Ω BNC Connector

Build professional broadcast, video and SDI coaxial cables with the Neutrik NBNC75BTU11 rearTWIST HD 75Ω BNC Male Cable Connector, designed for high-density broadcast and professional video systems where reliable 75-ohm performance and easy connector access are critical.

The NBNC75BTU11 combines Neutrik’s patented rearTWIST operating system with a true 75 Ω impedance, precision-machined brass construction, gold-plated centre contact, PTFE insulation and professional shield-and-jacket crimp termination.

Unlike a conventional BNC connector that is normally locked or released by gripping the front body, Neutrik’s rearTWIST design allows technicians to operate the bayonet mechanism from the rear soft-touch boot.

That makes it particularly useful in:

• Broadcast patch panels
• Dense video racks
• Recessed equipment panels
• OB systems
• Touring video racks
• Broadcast facilities
• Film and television production
• Live event video
• Professional AV installations
• SDI infrastructure
• Video routing systems

The NBNC75BTU11 is specifically matched to professional 75 Ω coaxial cables including Belden 1694A, making it an excellent connector choice for technicians building or repairing broadcast-quality video cables.

True 75 Ω BNC Design

The NBNC75BTU11 is a true 75 Ω BNC connector.

Maintaining the correct impedance through both the cable and connector is particularly important in professional digital-video systems.

An impedance mismatch can contribute to:

• Reflections
• Increased return loss
• Signal degradation
• Reduced transmission margin
• Unreliable operation over longer cable runs

Using a correctly matched 75 Ω cable and connector helps preserve the electrical characteristics expected by professional broadcast and video equipment.

Designed for Professional HD Video

Neutrik classifies the NBNC75BTU11 within its:

rearTWIST HD BNC Cable Connector

range.

It is designed for professional HD and SDI video applications requiring true 75 Ω connectivity and controlled high-frequency performance.

Potential applications include:

• Broadcast television
• HD video
• SDI infrastructure
• HD-SDI
• Professional routing systems
• Video patch systems
• Production monitors
• Broadcast cameras
• Video processors
• Outside broadcast systems
• Live event video
• Film and television production

For higher-bandwidth UHD, 4K and 8K applications, Neutrik manufactures dedicated rearTWIST UHD versions such as the NBNC75BTU11X.

rearTWIST – Operate the BNC from the Rear

The defining feature of the NBNC75BTU11 is Neutrik’s patented rearTWIST principle.

With a conventional BNC connector, the technician generally needs access to the front metal body to rotate the bayonet fitting.

That can become difficult when BNC connectors are installed close together in:

• Patch bays
• Routing frames
• Video switchers
• Rack panels
• Broadcast equipment
• Recessed bulkheads

The rearTWIST design allows the bayonet connection to be locked or released by rotating the easily accessible rear boot.

This gives technicians much better access in dense professional video installations.

Ideal for High-Density BNC Panels

Broadcast racks can contain large numbers of BNC connections positioned very close together.

When several conventional BNC connectors are installed side by side, there may be very little space to grip and rotate each connector body.

The rearTWIST boot extends the usable operating point rearward, giving technicians a convenient grip even where the connector head itself is difficult to reach.

This makes the NBNC75BTU11 particularly well suited to:

• Broadcast patching
• Router panels
• Vision racks
• OB trucks
• Video flypacks
• Equipment racks
• Studio infrastructure

Bayonet Locking

The connector uses the familiar professional BNC bayonet locking system.

The plug is inserted into a compatible BNC receptacle and rotated into its locked position.

The bayonet interface provides:

• Fast connection
• Positive mechanical engagement
• Familiar professional operation
• Easy visual and tactile confirmation

The rearTWIST boot simply makes operating this conventional BNC locking principle considerably easier in confined spaces.

Compatible with Belden 1694A

One of the strongest applications for NBNC75BTU11 is professional Belden 1694A 75 Ω coaxial cable.

Neutrik specifically identifies Belden 1694A (ANH) as an approved cable for this connector.

Belden 1694A is widely used throughout professional broadcast and video infrastructure, making the NBNC75BTU11 a natural choice for:

• Custom video cable manufacture
• Broadcast cable repair
• Patch leads
• Rack wiring
• Touring video inventory
• Studio installation
• OB production

Correct connector-to-cable matching is essential because BNC crimp dimensions vary according to cable construction.

Official Compatible Cable Types

Neutrik currently identifies the NBNC75BTU11 for use with:

• Belden 1694A (ANH)
• Belden 4694R
• Bryant BD SD11
• Canare L-4.5CHD
• Clark Wire CD7506-0
• CommScope 5765
• Gepco VSD2001
• Suhner S05163-02
• Suhner S05133-07
• Percon VK77

Always confirm the exact cable type before assembling a BNC connector.

A coaxial cable may have a similar outside diameter while still requiring a different:

• Centre-pin crimp
• Shield crimp
• Ferrule
• Connector model

For reliable broadcast cable manufacture, use Neutrik’s current cable-to-connector compatibility data rather than choosing solely by cable diameter.

7.3mm Cable Outside Diameter

Neutrik specifies:

Cable O.D.: 7.3mm

for the NBNC75BTU11.

This specification reflects the cable construction for which the connector is designed.

Cable outside diameter alone should not be used as the only compatibility check.

Correct coaxial dimensions at the:

• Centre conductor
• Dielectric
• Braid
• Jacket

are all important to achieving the intended crimp and impedance performance.

Dedicated Centre-Pin Crimp

The NBNC75BTU11 uses:

1.6mm square crimp for the centre pin

according to Neutrik’s current specification.

This is an important model-specific assembly requirement.

The centre conductor must be correctly inserted into and crimped to the centre contact using the appropriate die.

Incorrect crimp tooling can result in:

• Loose centre contacts
• Poor electrical continuity
• Damaged pins
• Incorrect connector assembly
• Unreliable broadcast cables

7.36mm Hex Shield Crimp

The connector uses:

7.36mm hex crimp

for the shield / cable jacket assembly.

This dimension is specifically matched to the intended cable construction.

Neutrik’s shield and jacket crimp design helps provide:

• Cable retention
• Shield continuity
• Mechanical support
• A clean completed assembly

Correct tooling is therefore essential.

Shield and Jacket Crimp Technology

Neutrik’s rearTWIST connector design crimps the shield and cable jacket in a way that avoids leaving exposed grounding braid around the completed connector.

This provides a cleaner professional cable assembly while helping improve:

• Cable retention
• Shield integrity
• Mechanical protection

For touring and broadcast environments, this is particularly useful because cables may undergo frequent:

• Handling
• Coiling
• Patching
• Transport
• Reconnection

Recommended Neutrik Crimp Tooling

Neutrik lists dedicated tooling for professional assembly of this connector.

Compatible options include the:

HX-BNC crimp tool frame

with:

DIE-BNC-U die

which provides:

• 1.6mm centre-pin crimp
• 7.36mm shield/jacket hex crimp

Neutrik also lists its newer HX-R-BNC tooling platform with appropriate DIE-R series dies.

Using the correct manufacturer-specified die helps maintain repeatable crimp dimensions across professional cable production.

Professional Coax Cable Preparation

Correct cable preparation is every bit as important as connector quality.

When assembling the NBNC75BTU11:

• Use the correct cable type
• Use the correct stripping dimensions
• Avoid damaging the centre conductor
• Avoid nicking the braid
• Maintain the dielectric geometry
• Prevent loose braid strands
• Use the specified crimp dies
• Confirm the centre pin is fully seated
• Inspect the completed jacket crimp
• Test the finished cable

Poor preparation can introduce impedance discontinuities even when a genuine professional BNC connector is used.

Snug-Fit Centre Pin

Neutrik incorporates a snug-fit centre-pin insert.

During assembly, the centre pin provides tactile feedback when correctly inserted into the connector.

This helps technicians confirm that the contact has seated properly before completing assembly.

That small detail is particularly useful in workshops assembling large numbers of broadcast cables.

Precision Swiss-Machined Brass Components

Neutrik uses precision-machined brass components throughout the connector.

The current material specification includes:

Centre Contact: Brass CuZn35Pb2
Connector Shell: Brass CuZn39Pb3

Precision machining helps maintain the mechanical tolerances required for reliable high-frequency BNC operation.

Gold-Plated Centre Contact

The centre contact uses:

0.2 µm AuCo gold plating

over the brass contact.

This provides the central electrical interface within the 75 Ω BNC connection.

Gold plating is particularly useful in low-voltage signal connections because it provides a stable professional contact surface.

Optalloy Shell Plating

Neutrik specifies:

Shell Plating: Optalloy

for the standard NBNC75BTU11 HD connector.

The plated brass shell provides the outer electrical and mechanical interface of the BNC system.

This distinguishes the standard HD model from Neutrik’s UHD “X” version, which uses a different high-frequency construction and plating specification.

PTFE Insulator

The NBNC75BTU11 uses:

PTFE

for the connector insert / dielectric.

The insulating geometry of a BNC connector plays an important role in maintaining its characteristic impedance.

In high-frequency coaxial systems, the dielectric and contact geometry are not simply mechanical supports—they are part of the connector’s electrical design.

Published Return-Loss / VSWR Performance

Neutrik publishes specific VSWR and return-loss performance for NBNC75BTU11.

The current specifications are:

Up to 1 GHz:
VSWR ≤1.050 / Return Loss >32 dB

Up to 2 GHz:
VSWR ≤1.065 / Return Loss >30 dB

Up to 3 GHz:
VSWR ≤1.100 / Return Loss >26 dB

These figures provide much more useful technical information than simply describing the connector as having “excellent signal integrity”.

They demonstrate the controlled 75 Ω performance of the connector across professional HD video frequencies.

What Return Loss Means

Return loss is a measure of how much signal energy is reflected back toward the source because of impedance irregularities.

Higher return-loss figures indicate less unwanted reflected energy.

In a professional coaxial video path, impedance consistency can be affected by:

• Connector geometry
• Cable construction
• Cable bends
• Poor crimping
• Damaged coax
• Adapter quality
• Patch points

A true 75 Ω connector helps reduce one potential source of impedance mismatch.

Contact Resistance

Neutrik specifies:

Inner Contact Resistance: ≤3 mΩ

and:

Outer Contact Resistance: ≤2 mΩ.

These low resistance values form part of the connector’s published electrical performance.

Insulation Resistance

Neutrik specifies:

Insulation Resistance: >5 GΩ.

This helps maintain electrical isolation between the centre signal path and the outer shield.

Dielectric Strength

Neutrik specifies:

Dielectric Strength: 1.5 kV DC.

This is an electrical test specification for the connector.

It should not be interpreted as a working-voltage rating for power applications.

Rated Voltage

The NBNC75BTU11 has a published:

Rated Voltage: <50 V.

This connector is designed for professional video and signal applications.

It is not intended for general mains-power distribution.

More Than 1,000 Mating Cycles

Neutrik specifies:

Lifetime: >1,000 mating cycles.

That makes the connector particularly appropriate for production environments where cables may be plugged and unplugged repeatedly.

Typical examples include:

• Broadcast patching
• Touring video
• Live event production
• Rental inventory
• OB trucks
• Film and television
• Studio systems

Actual service life will depend on handling, connector cleanliness and condition of the mating BNC hardware.

Cable Retention

Neutrik specifies:

Cable Retention: >30 N at the centre

for the NBNC75BTU11.

Correct crimping and cable preparation remain necessary to achieve the intended mechanical performance.

Insertion Force

Neutrik specifies:

Insertion Force: <25 N.

Combined with the bayonet-locking mechanism and rearTWIST operation, this supports fast professional patching in dense video systems.

-30°C to +85°C Temperature Range

The connector itself is specified for:

-30°C to +85°C.

The complete cable assembly may have a different operating range according to:

• Coax cable
• Connected equipment
• Environment
• Installation

Always consider the lowest-rated component of the completed system.

Broadcast Television

The NBNC75BTU11 is particularly well suited to professional broadcast systems.

Potential applications include:

• Studio camera feeds
• Broadcast routing
• Vision racks
• Video patching
• Monitoring
• Signal distribution
• Production control rooms
• Broadcast engineering

True 75 Ω performance is especially important where signal paths contain multiple connectors and patch points.

Outside Broadcast and OB Trucks

Outside-broadcast vehicles and flypacks often contain extremely dense equipment racks.

Hundreds of coaxial connections may exist within a limited physical area.

The rearTWIST design is highly useful here because technicians can operate connectors from the rear boot where the metal BNC head may be difficult to grip.

Potential OB applications include:

• Camera feeds
• Router I/O
• Monitoring
• Replay
• Vision switching
• Recording systems
• Signal distribution

Live Event Video

Live events increasingly rely on professional video systems including:

• Cameras
• Vision mixers
• LED processors
• Recorders
• Routers
• Converters
• Monitoring
• Broadcast feeds

The NBNC75BTU11 can be used to build compatible professional 75 Ω coaxial cables throughout these systems.

This makes it relevant to:

• Concert touring
• Festivals
• Corporate events
• Sports
• Awards shows
• Conferences
• Broadcast events

Film and Television Production

Film and television environments may use professional coaxial video cabling across:

• Studios
• Outside broadcast
• Production stages
• Camera systems
• Monitoring
• Video villages
• Routing
• Recording

The rugged bayonet connection and precision 75 Ω design make BNC a long-established professional video interface.

Touring Video Systems

Touring video equipment is repeatedly:

• Patched
• Unpatched
• Packed
• Transported
• Reinstalled

A BNC cable connector in this environment needs to combine electrical performance with mechanical durability.

The NBNC75BTU11’s:

• 1,000 mating-cycle rating
• Rear-access locking
• Crimp strain retention
• Machined brass construction

make it well suited to professional touring inventory.

Video Patch Panels

Dense video patching is one of the applications where rearTWIST becomes particularly useful.

The ability to lock and unlock from behind the connector body gives technicians easier access when BNC receptacles are located extremely close together.

This can make installation and maintenance considerably faster than struggling to grip individual conventional connector heads.

Permanent AV Installations

Professional AV installations may use BNC infrastructure for:

• Video routing
• Broadcast feeds
• Monitoring
• SDI distribution
• Camera systems

Crimp-terminated BNC cables can provide a durable serviceable installation when assembled using the correct cable, connector and tooling.

HD-SDI and SDI Systems

The NBNC75BTU11 belongs to Neutrik’s HD BNC family and is intended for professional SDI and HD-video use.

Its true 75 Ω architecture and specified performance through 3 GHz make it relevant to properly engineered HD digital-video systems.

Where using the connector for higher-data-rate formats, performance of the complete assembled cable should always be checked against:

• Cable manufacturer distance limits
• Video format
• Required bandwidth
• Equipment specification
• Complete connector path

A connector specification alone does not determine the maximum usable SDI cable length.

3G-SDI Considerations

3G-SDI operates at approximately 3 Gb/s and places greater demands on the complete coaxial transmission path than lower-rate HD systems.

The NBNC75BTU11 has manufacturer-published electrical performance through 3 GHz.

For 3G-SDI applications, the completed assembly—including the selected coaxial cable, connector installation, overall length and equipment—must still meet the required transmission performance.

For critical professional systems, test the completed cable at the intended data rate rather than assuming compatibility from the connector alone.

Not the UHD / 4K / 8K Variant

This distinction is especially important.

The product on this page is:

NBNC75BTU11

It is part of Neutrik’s rearTWIST HD range.

Neutrik separately manufactures:

NBNC75BTU11X

as part of its rearTWIST UHD range.

The UHD “X” model uses an optimised contact and insulator design specifically for high-resolution UHD transmission and provides substantially greater high-frequency return-loss headroom.

NBNC75BTU11 vs NBNC75BTU11X

NBNC75BTU11 – HD

• rearTWIST HD
• True 75 Ω
• Published performance through 3 GHz
• 1.6mm square centre-pin crimp
• PTFE insert
• Optalloy shell plating
• Designed for professional HD applications

NBNC75BTU11X – UHD

• rearTWIST UHD
• True 75 Ω
• Specifically optimised for 4K / 8K video
• Published performance through 18 GHz
• 1.07mm centre-pin crimp
• Optimised UHD insulator/contact geometry
• Antraloy shell plating
• Greater return-loss headroom at high frequencies

If the application specifically requires Neutrik’s UHD / 4K / 8K BNC performance, select the correct X-series UHD model rather than assuming the standard NBNC75BTU11 has the same electrical specification.

Colour-Coded Boot Options

Neutrik offers BST-BNC coloured rearTWIST boots in multiple colours.

Colour coding can be used to identify cables according to:

• Signal type
• Cable length
• Camera
• Department
• Destination
• Production
• Ownership
• System

This can be particularly useful in:

• OB trucks
• Broadcast studios
• Touring systems
• Equipment-hire inventory

where large quantities of visually similar coaxial cables are used.

Cable Identification

A practical broadcast inventory may use boot colours or labels to differentiate:

• Camera feeds
• Return video
• Reference
• Monitoring
• Router outputs
• Different cable lengths

Clear identification can significantly reduce patching errors during production.

Test Completed Video Cables

Every newly manufactured or repaired professional video cable should be tested before entering service.

At a minimum, check:

• Centre-conductor continuity
• Shield continuity
• No centre-to-shield short
• Correct connector seating
• Correct cable retention
• Mechanical condition

For critical high-data-rate SDI infrastructure, appropriate cable-performance testing may also be required.

Avoid Sharp Cable Bends

Coaxial cable geometry is important to maintaining 75 Ω impedance.

Excessively tight bends, crushing or mechanical damage can alter the cable geometry and negatively affect high-frequency performance.

When installing professional coax:

• Respect the cable manufacturer’s bend radius
• Avoid crushing
• Protect cables from equipment wheels
• Avoid excessive tie tension
• Provide suitable strain relief

A premium connector cannot compensate for damaged coaxial cable.

Product Specifications

Brand: Neutrik
Model: NBNC75BTU11
Series: rearTWIST HD BNC
Connection Type: BNC 75 Ω
Gender: Male
Impedance: True 75 Ω
Locking: Bayonet with patented rearTWIST operation
Cable O.D.: 7.3mm
Centre-Pin Crimp: 1.6mm square
Shield / Jacket Crimp: 7.36mm hex
Cable Anchoring: Jacket crimp
Cable Retention: >30 N
Insertion Force: <25 N
Inner Contact Resistance: ≤3 mΩ
Outer Contact Resistance: ≤2 mΩ
Insulation Resistance: >5 GΩ
Dielectric Strength: 1.5 kV DC
Rated Voltage: <50 V
VSWR / Return Loss to 1 GHz: ≤1.050 / >32 dB
VSWR / Return Loss to 2 GHz: ≤1.065 / >30 dB
VSWR / Return Loss to 3 GHz: ≤1.100 / >26 dB
Centre Contact: Brass CuZn35Pb2
Centre Contact Plating: 0.2 µm AuCo gold
Insert: PTFE
Shell: Brass CuZn39Pb3
Shell Plating: Optalloy
Mechanical Life: >1,000 mating cycles
Temperature Range: -30°C to +85°C
Crimpability: IEC 60803 and IEC 60352-2 compliant

Official Compatible Cables

Neutrik currently identifies the following cable types for NBNC75BTU11:

• Belden 1694A (ANH)
• Belden 4694R
• Bryant BD SD11
• Canare L-4.5CHD
• Clark Wire CD7506-0
• CommScope 5765
• Gepco VSD2001
• Suhner S05163-02
• Suhner S05133-07
• Percon VK77

Always confirm the current Neutrik cable compatibility data before assembly if the cable designation differs from those listed.

Recommended Neutrik Tooling

Suitable Neutrik workshop accessories include:

HX-BNC: BNC crimp tool frame
DIE-BNC-U: 1.6mm centre pin / 7.36mm shield-jacket crimp die
HX-R-BNC: Current rear-series crimp frame option
DIE-R-BNC-PU: Compatible rear-series die option
CS-BNC-RT: Coaxial cable stripper for appropriate cable diameters
BST-BNC: Optional colour-coded rearTWIST boots
CAS-BNC-T: BNC assembly tool kit

Using the correct tooling is strongly recommended for repeatable professional cable manufacture.

Why Choose the Neutrik NBNC75BTU11?

Choose the NBNC75BTU11 where professional video systems require:

• Genuine Neutrik quality
• True 75 Ω impedance
• Professional HD BNC connectivity
• Patented rearTWIST operation
• Easy access in high-density panels
• Bayonet locking
• Published electrical performance through 3 GHz
• Dedicated Belden 1694A compatibility
• Precision-machined brass construction
• Gold-plated centre contact
• PTFE insulation
• Professional shield and jacket crimping
• More than 1,000 mating cycles
• Optional colour-coded identification
• Professional broadcast and touring suitability

It is particularly useful for broadcast, television, live video, touring, film, professional AV and permanent video infrastructure where reliable BNC connections need to withstand repeated professional use.

Why Buy Neutrik NBNC75BTU11 from GigLife?

GigLife supplies professional connectors, adaptors, cables, tapes, consumables and technical accessories specifically for the entertainment and production industries.

With more than 25 years of hands-on live entertainment industry experience, GigLife understands that video systems are only as reliable as the cabling and connections linking them together.

Products are selected by people who work in production and understand the requirements of:

• Video technicians
• Broadcast engineers
• AV technicians
• Touring crews
• Production companies
• Film and television departments
• Broadcast facilities
• Festivals
• Live event video departments
• Conference production
• Exhibition contractors
• Equipment-hire businesses
• Venues and performing arts centres

Whether you are building SDI cables, repairing touring video inventory, wiring a broadcast rack or restocking a professional technical workshop, GigLife supplies genuine professional components selected by people who understand the job.

Orders are dispatched from Brisbane, with Australia-wide shipping available.

GigLife is proudly by the professionals… for the professionals.