Neutrik NBNC75BLP7 rearTWIST HD 75Ω BNC Connector
Build professional broadcast, SDI and video coaxial cables with the Neutrik NBNC75BLP7 rearTWIST HD 75Ω BNC Male Cable Connector, designed specifically for compatible 6.3mm professional 75-ohm coaxial cables including Belden 8241, Canare LV-61S and RG59B/U.
Part of Neutrik’s professional rearTWIST HD BNC family, the NBNC75BLP7 combines true 75 Ω impedance with Neutrik’s patented rear-operated bayonet locking system, precision-machined brass components, a gold-plated centre contact, PTFE insulation and professional shield-and-jacket crimp termination.
The connector is specified for:
- 6.3mm cable O.D.
- 1.6mm square centre-pin crimp
- 6.47mm hex shield/jacket crimp
- True 75 Ω impedance
- Published return-loss performance through 3 GHz
- Bayonet locking
- Patented rearTWIST operation
- More than 1,000 mating cycles
- Cable retention greater than 30N
- Gold-plated centre contact
- Precision-machined brass body
- PTFE dielectric
It is particularly suited to professional applications including:
- Broadcast television
- HD-SDI infrastructure
- SDI video systems
- Professional AV
- Film and television
- Outside broadcast
- Touring video
- Live event video
- Video routing
- Broadcast patching
- Production racks
- Camera systems
- Equipment-hire inventory
- Broadcast and video workshops
Professional 75Ω Broadcast BNC
The NBNC75BLP7 is engineered as a true 75 Ω BNC cable connector.
Maintaining the correct characteristic impedance throughout a professional coaxial signal path is particularly important for digital video.
The complete system may include:
- Coaxial cable
- BNC cable connectors
- Chassis connectors
- Patch panels
- Routers
- Distribution amplifiers
- Vision mixers
- Cameras
- Recorders
- Displays
Impedance irregularities can create signal reflections and reduce the operating margin of the video system.
Correctly matching the BNC connector to the actual coaxial cable therefore matters just as much as choosing a cable labelled 75 Ω.
rearTWIST HD Series
Neutrik classifies the NBNC75BLP7 as a:
rearTWIST HD BNC cable connector
designed specifically for professional high-definition video applications.
The connector combines controlled electrical performance with one of Neutrik’s most practical BNC innovations:
rear-operated locking and unlocking.
Patented rearTWIST Operation
Conventional BNC plugs are normally connected or disconnected by gripping the metal connector body at the front.
That can become difficult when BNC connectors are closely spaced.
Neutrik’s patented rearTWIST principle allows the technician to operate the bayonet mechanism by rotating the easily accessible soft-touch boot behind the connector.
This is especially useful in:
- Broadcast racks
- Video routers
- Patch panels
- Vision racks
- OB trucks
- Flypacks
- Recessed bulkheads
- High-density AV systems
The electrical interface remains conventional BNC—the rearTWIST system simply makes the connector much easier to operate in confined spaces.
Designed for High-Density Video Panels
Professional broadcast systems may contain dozens or hundreds of BNC connections mounted close together.
With conventional connectors, it can be difficult to get fingers around the front of the BNC shell.
rearTWIST moves the usable grip point behind the connector head.
That can make:
- Initial installation
- Patching
- Cable changes
- Servicing
- Troubleshooting
considerably easier.
6.3mm Cable O.D.
Neutrik specifies:
Cable O.D.: 6.3mm
for the NBNC75BLP7.
However, cable O.D. alone does not determine compatibility.
Several Neutrik BNC models share the same nominal 6.3mm outer cable dimension while being designed for different:
- Centre-conductor diameters
- Dielectric dimensions
- Shield geometries
- Coaxial constructions
Always select the BNC connector by exact cable model or manufacturer-approved cable dimensions.
Compatible with Belden 8241
Neutrik officially lists:
Belden 8241
as a suitable cable for the NBNC75BLP7.
This makes it particularly useful for technicians maintaining professional video systems based around traditional 75 Ω broadcast coax.
Potential applications include:
- Studio infrastructure
- Video patching
- Equipment racks
- Monitoring
- Camera systems
- Production video
Compatible with Canare LV-61S
Neutrik also lists:
Canare LV-61S
for the NBNC75BLP7.
This makes the connector particularly relevant to professional workshops and production companies working with Canare 75 Ω video cable.
RG59B/U Compatibility
Neutrik specifically lists:
RG59B/U
among the suitable cable types.
This is important because the generic term RG59 covers a broad family of coaxial cable constructions.
For the GigLife listing, I recommend using:
RG59B/U and other cables specifically listed by Neutrik
rather than broadly claiming compatibility with every cable marketed as RG59.
Official Compatible Cable Types
Neutrik currently lists NBNC75BLP7 for cables including:
- Belden 8241
- CAE KX6A
- Canare LV-61S
- Cordial CVI / CVM 06-37
- CommScope 5563
- Draka 0.6/3.7
- Draka 0.6L/3.7
- Proel HPC 805
- RG59B/U
- Sommer 600-0051 M/L/S
- Sommer 600-0054 M/L/S
- Klotz V06/37
- Nexans HF 75 0,6/3,7 2YCY
- Percon VK95
For cable types not specifically listed, check the current Neutrik Cable-to-Connector Guide before assembly.
BLP7 vs BLP9 – Important Difference
The NBNC75BLP7 and NBNC75BLP9 can easily be confused.
Both have:
- 6.3mm cable O.D.
- 1.6mm centre-pin crimp
- 6.47mm shield crimp
- True 75 Ω impedance
- rearTWIST HD construction
- The same published return-loss specification
However, the internal coaxial geometry they are designed around is different.
NBNC75BLP7
Designed around a smaller centre-conductor class.
Representative cables include:
- Belden 8241
- Canare LV-61S
- CommScope 5563
- RG59B/U
NBNC75BLP9
Designed for a different 6.3mm coax geometry.
Representative cables include:
- Belden 1505A
- Belden 4505R
- Canare L-4CFB
- CommScope 5565
- Gepco VPM2000
Do not substitute BLP7 and BLP9 simply because the outside cable diameter and crimp dimensions appear identical.
The exact cable geometry determines the correct model.
1.6mm Centre-Pin Crimp
The NBNC75BLP7 uses:
1.6mm square centre-pin crimp
according to IEC 60803 die designation 2.
Correct pin crimping is essential for:
- Reliable continuity
- Correct mechanical seating
- Repeatable assembly
- Long-term cable reliability
Use a proper crimp tool rather than pliers or improvised tooling.
6.47mm Shield and Jacket Crimp
The shield and cable jacket require:
6.47mm hex crimp
according to IEC 60803 die designation E.
This forms an important part of both:
- Electrical shield continuity
- Mechanical cable retention
The shield/jacket crimp must match the connector and cable dimensions correctly.
Recommended DIE-BNC-PG Tooling
For Neutrik’s HX-BNC crimp-tool frame, the appropriate die is:
DIE-BNC-PG
providing:
Centre Pin: 1.6mm square
Shield/Jacket: 6.47mm hex
Additional Shield Position: 5.00mm
The 1.6mm / 6.47mm combination is used for NBNC75BLP7.
Current HX-R-BNC Tooling
Neutrik’s current modular BNC tool platform also supports NBNC75BLP7.
The:
DIE-R-BNC-PDC
used with:
HX-R-BNC
contains:
- 1.60mm centre-pin crimp
- 6.47mm shield/jacket crimp
- 4.53mm shield/jacket crimp
- 4.06mm shield/jacket crimp
For NBNC75BLP7, use the 1.60mm / 6.47mm positions.
Shield and Jacket Crimp Technology
Neutrik’s construction crimps both the coaxial shield and cable jacket.
This helps:
- Maintain shield continuity
- Retain the cable mechanically
- Provide strain management
- Prevent exposed grounding braid around the finished connector
The result is a clean professional cable assembly suited to demanding broadcast and touring use.
Snug-Fit Centre Pin
The centre-pin insert provides tactile feedback when the contact seats correctly.
This helps technicians identify proper assembly before completing the connector.
Small assembly features like this are particularly useful when a workshop is terminating large numbers of professional coaxial cables.
True 75Ω Impedance
Neutrik specifies the NBNC75BLP7 as:
75 Ω
rather than merely using a BNC-shaped connector with approximate impedance characteristics.
This controlled geometry supports professional digital-video transmission.
Published Return-Loss Performance
Neutrik publishes the following performance:
Up to 1 GHz
VSWR: ≤1.050
Return Loss: >32dB
Up to 2 GHz
VSWR: ≤1.065
Return Loss: >30dB
Up to 3 GHz
VSWR: ≤1.100
Return Loss: >26dB
These measurable figures provide much more useful technical information than simply saying the connector provides “excellent signal integrity”.
Understanding Return Loss
Return loss describes how much energy is reflected because of impedance irregularities within a transmission path.
Potential causes include:
- Incorrect connector selection
- Poor crimping
- Cable damage
- Excessive bending
- Poor adapters
- Incorrect termination
- Connector damage
Higher return-loss figures represent less unwanted reflected energy.
Correct connector-to-cable matching therefore matters significantly in professional digital-video infrastructure.
HD-SDI Applications
The NBNC75BLP7 is well suited to professional HD-SDI applications when paired with an appropriate cable and correctly assembled.
Potential uses include:
- Camera feeds
- Video routers
- Monitoring
- Broadcast patching
- Production racks
- Vision systems
- Touring video
Maximum working cable length depends on the actual coaxial cable and the complete system.
3G-SDI Applications
Neutrik publishes connector performance through 3 GHz, so 3G-SDI is a relevant use case.
However, 3G-SDI reliability depends on the complete cable assembly.
Important factors include:
- Cable attenuation
- Total cable length
- Connector assembly
- Number of patch points
- Cable condition
- Connected equipment
The BNC connector alone does not determine the maximum supported SDI format or transmission distance.
For critical systems, test completed cable assemblies at the required signal standard.
rearTWIST HD – Not UHD
The product on this page is:
NBNC75BLP7
from Neutrik’s:
rearTWIST HD
range.
Neutrik also manufactures:
NBNC75BLP7X
from its:
rearTWIST UHD
range.
The two connectors fit the same general cable-size class but have different internal high-frequency designs.
NBNC75BLP7 vs NBNC75BLP7X
NBNC75BLP7 – HD
- True 75 Ω
- 6.3mm cable O.D.
- 1.6mm centre-pin crimp
- 6.47mm shield crimp
- PTFE dielectric
- Optalloy-plated shell
- Published performance through 3 GHz
NBNC75BLP7X – UHD
- True 75 Ω
- 6.3mm cable O.D.
- 1.07mm centre-pin crimp
- 6.47mm shield crimp
- Optimised UHD contact design
- PP dielectric
- Antraloy shell plating
- Published performance through 18 GHz
- Designed for high-resolution 4K and 8K video
The centre-pin crimp dimensions are therefore not interchangeable.
Dedicated UHD / 4K / 8K Version
If the application specifically requires Neutrik’s dedicated UHD performance, use the corresponding:
NBNC75BLP7X
where the cable is approved for that connector.
The UHD version publishes:
Return Loss >30dB to 6 GHz
Return Loss >24dB to 12 GHz
Return Loss >20dB to 18 GHz
The standard NBNC75BLP7 should therefore remain marketed as the HD model, rather than being broadly labelled as a 4K/8K connector.
Precision Swiss-Machined Brass Components
Neutrik uses precision-machined brass components for the BNC body and contact system.
Published materials include:
Centre Contact: Brass CuZn35Pb2
Shell: Brass CuZn39Pb3
The dimensional precision of the parts contributes to the controlled 75 Ω geometry.
Gold-Plated Centre Contact
The centre contact uses:
0.2µm AuCo gold plating.
This provides a stable professional signal interface within the connector.
PTFE Insulator
The standard HD NBNC75BLP7 uses:
PTFE
for its internal dielectric.
The dielectric is part of the connector’s controlled impedance geometry and directly influences its high-frequency electrical behaviour.
Optalloy Shell Plating
The brass shell uses:
Optalloy plating.
This is one of the construction differences between the standard HD model and the BLP7X UHD model, which uses Antraloy.
Inner Contact Resistance
Neutrik specifies:
≤3mΩ
for the inner contact.
Outer Contact Resistance
Neutrik specifies:
≤2mΩ
for the outer contact.
Insulation Resistance
Neutrik specifies:
>5GΩ.
Dielectric Strength
Neutrik specifies:
1.5kV DC.
This is a component test specification and should not be confused with a normal operating-voltage recommendation.
Rated Voltage
The connector is rated:
<50V.
It is intended for professional video and signal applications, not mains-power distribution.
Cable Retention
Neutrik specifies:
>30N cable retention
when correctly assembled.
Correct tooling and cable compatibility are necessary to achieve the intended mechanical performance.
Insertion Force
Neutrik specifies:
<25N insertion force.
More Than 1,000 Mating Cycles
Neutrik specifies:
>1,000 mating cycles.
This makes the NBNC75BLP7 suitable for professional applications involving regular connection and disconnection.
Operating Temperature
The connector is specified for:
-30°C to +85°C.
The complete cable assembly may have a different temperature limit according to the selected coaxial cable.
Broadcast Television
The NBNC75BLP7 is particularly useful for broadcast infrastructure including:
- Studio racks
- Camera feeds
- Monitoring
- Signal routing
- Patch systems
- Production control
- Distribution systems
The rearTWIST mechanism is especially useful where connector density is high.
Outside Broadcast
OB trucks and mobile broadcast systems often contain dense racks of BNC connectors.
Applications may include:
- Camera systems
- Vision mixing
- Replay
- Recording
- Monitoring
- Routing
- Distribution
rearTWIST makes these connections easier to access without changing the familiar BNC interface.
Film and Television
Film and television production may use 75 Ω coax throughout:
- Studios
- Production stages
- Camera systems
- Monitoring
- Video villages
- Recording
- Routing
The NBNC75BLP7 provides a professional option for compatible coaxial cable.
Live Event Video
Potential live-production applications include:
- IMAG
- Cameras
- LED processors
- Vision mixers
- Recorders
- Routers
- Video distribution
- Broadcast feeds
Professional BNC cable assemblies remain widely used across concerts, festivals, conferences, exhibitions and sporting events.
Touring Video
Touring cables are repeatedly:
- Connected
- Disconnected
- Coiled
- Transported
- Deployed
The NBNC75BLP7’s true 75 Ω construction, rearTWIST mechanism, professional crimping system and >1,000 mating-cycle specification suit demanding touring inventories.
Professional AV
Professional AV systems may use BNC for:
- SDI video
- Camera feeds
- Video routing
- Recording
- Monitoring
- Broadcast integration
The NBNC75BLP7 is appropriate where the actual coaxial cable is one of Neutrik’s compatible BLP7 cable types.
Equipment-Hire Companies
Equipment-hire businesses may use NBNC75BLP7 when:
- Building video cable inventory
- Repairing damaged coax
- Maintaining RG59B/U-based systems
- Building Canare LV-61S cables
- Preparing touring video packages
- Maintaining OB systems
Correct connector identification is particularly important in workshops carrying multiple types of visually similar 75 Ω coax.
Optional Colour-Coded Boots
Neutrik offers BST-BNC rearTWIST boots in multiple colours.
Colour identification can be useful for:
- Cable length
- Camera number
- Signal type
- Destination
- Department
- Production
- Ownership
This is especially useful in broadcast and touring environments where many similar black coaxial cables may be deployed.
Correct Cable Preparation
Professional BNC performance depends heavily on assembly quality.
When terminating NBNC75BLP7:
- Confirm the exact cable model.
- Follow the correct stripping dimensions.
- Avoid damaging the centre conductor.
- Maintain dielectric geometry.
- Control braid strands.
- Seat the centre contact fully.
- Crimp the centre contact with the correct 1.6mm die.
- Crimp the shield/jacket with the correct 6.47mm die.
- Inspect the finished cable.
- Test before production use.
Avoid Excessive Cable Bending
Coaxial cable relies on controlled geometry to maintain its characteristic impedance.
Avoid:
- Crushing
- Tight bends
- Excessive cable-tie pressure
- Heavy equipment rolling across the cable
- Poor storage
Follow the cable manufacturer’s minimum bend-radius requirements.
Test Completed Cable Assemblies
New or repaired professional video cables should be tested before entering production inventory.
At minimum verify:
- Centre continuity
- Shield continuity
- No centre-to-shield short
- Correct connector assembly
- Cable retention
- Bayonet locking action
For high-data-rate digital video, suitable transmission testing is recommended.
Product Specifications
Brand: Neutrik
Model: NBNC75BLP7
Series: rearTWIST HD BNC
Connector Type: 75 Ω BNC cable connector
Gender: Male
Impedance: True 75 Ω
Locking: Bayonet with patented rearTWIST operation
Cable O.D.: 6.3mm
Centre-Pin Crimp: 1.6mm square
Shield/Jacket Crimp: 6.47mm hex
Centre-Pin Die Designation: IEC 60803 No. 2
Shield Die Designation: IEC 60803 E
Cable Anchoring: Jacket crimp
Cable Retention: >30N
Insertion Force: <25N
Mechanical Life: >1,000 mating cycles
Inner Contact Resistance: ≤3mΩ
Outer Contact Resistance: ≤2mΩ
Insulation Resistance: >5GΩ
Dielectric Strength: 1.5kV DC
Rated Voltage: <50V
Return Loss to 1 GHz: >32dB
Return Loss to 2 GHz: >30dB
Return Loss to 3 GHz: >26dB
Centre Contact: Brass CuZn35Pb2
Centre Contact Plating: 0.2µm AuCo gold
Insert: PTFE
Shell: Brass CuZn39Pb3
Shell Plating: Optalloy
Temperature Range: -30°C to +85°C
Crimpability: IEC 60803 / IEC 60352-2 compliant
Neutrik-Listed Compatible Cables
- Belden 8241
- CAE KX6A
- Canare LV-61S
- Cordial CVI / CVM 06-37
- CommScope 5563
- Draka 0.6/3.7
- Draka 0.6L/3.7
- Proel HPC 805
- RG59B/U
- Sommer 600-0051 M/L/S
- Sommer 600-0054 M/L/S
- Klotz V06/37
- Nexans HF 75 0,6/3,7 2YCY
- Percon VK95
Recommended Neutrik Tooling
HX-BNC: Traditional BNC crimp-tool frame
DIE-BNC-PG: 1.6mm centre-pin / 6.47mm shield-jacket crimp die
HX-R-BNC: Current modular crimp-tool frame
DIE-R-BNC-PDC: Includes 1.60mm centre-pin / 6.47mm shield crimp combination
CS-BNC-RT: Coaxial cable stripper for 4.0–8.0mm O.D. cable
BST-BNC: Optional colour-coded rearTWIST boots
CAS-BNC-T: BNC assembly tool kit
PT-BNC: Coaxial cable cutting tool
Why Choose the Neutrik NBNC75BLP7?
Choose the NBNC75BLP7 where professional video cable manufacture requires:
- Genuine Neutrik quality
- True 75 Ω impedance
- rearTWIST HD design
- 6.3mm cable compatibility
- Belden 8241 compatibility
- Canare LV-61S compatibility
- RG59B/U compatibility
- 1.6mm centre-pin crimp
- 6.47mm shield/jacket crimp
- Published performance through 3 GHz
- Easier handling in high-density BNC panels
- Precision-machined brass construction
- Gold-plated centre contact
- PTFE dielectric
- More than 1,000 mating cycles
- Professional broadcast and touring suitability
It is particularly valuable where 6.3mm professional coax using the BLP7 cable geometry needs a robust, accessible and properly controlled 75 Ω BNC termination.
Why Buy Neutrik NBNC75BLP7 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 reliable professional video depends on matching the exact cable, connector and tooling—not simply choosing a BNC based on cable diameter.
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 companies
- Venues and performing arts centres
Whether you are building Canare LV-61S cables, maintaining RG59B/U video infrastructure, repairing touring SDI inventory or restocking a professional broadcast 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.
