Neutrik NBNC75BYY11 rearTWIST HD 75Ω BNC Connector
Build professional broadcast, SDI and video coaxial cables with the Neutrik NBNC75BYY11 rearTWIST HD 75Ω BNC Male Cable Connector, designed specifically for larger-diameter professional 75-ohm coaxial cable.
Part of Neutrik’s professional rearTWIST HD BNC range, the NBNC75BYY11 combines a true 75 Ω impedance with a patented rear-operated bayonet locking system, precision-machined brass construction, gold-plated centre contact and professional shield/jacket crimp termination.
The connector is particularly suited to 8.0 mm O.D. broadcast coax, with Neutrik’s current cable guide confirming compatibility with cables including:
- Canare L-5CFB
- Canare L-5CFW
It uses:
- 1.6 mm square centre-pin crimp
- 8.23 mm 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
- Precision-machined brass components
- Gold-plated centre contact
- PTFE dielectric
- Optalloy-plated shell
The NBNC75BYY11 is ideal for:
- Broadcast television
- SDI video infrastructure
- HD-SDI systems
- Professional video
- Broadcast racks
- Outside broadcast
- Video routing
- Patch systems
- Film and television
- Live event video
- Touring video systems
- Professional AV
- Equipment-hire companies
- Broadcast and video workshops
Professional 75 Ω BNC Cable Connector
The NBNC75BYY11 is a male 75 Ω BNC cable connector engineered specifically for professional coaxial video applications.
True 75 Ω impedance is particularly important in professional video systems because both the cable and connector form part of the transmission path.
Impedance irregularities can contribute to:
- Reflections
- Poor return loss
- Reduced signal margin
- Increased transmission errors
- Unreliable performance over longer cable runs
Using a connector specifically matched to the intended 75 Ω coax helps maintain the electrical characteristics expected by professional video equipment.
rearTWIST HD Series
Neutrik classifies the NBNC75BYY11 as a:
rearTWIST HD BNC cable connector.
This distinction is useful because Neutrik manufactures different BNC models for:
- Different coaxial cable dimensions
- Different shield-crimp sizes
- Different high-frequency performance requirements
The NBNC75BYY11 belongs to the HD range and should be selected according to both the cable and the required application.
Patented rearTWIST Operation
The standout feature is Neutrik’s patented rearTWIST principle.
With a conventional BNC connector, technicians normally grip and rotate the front metal body to engage or release the bayonet locking mechanism.
That becomes difficult when connectors are packed closely together.
Neutrik’s rearTWIST design moves the practical operating point to the rear of the connector.
Technicians can grip and rotate the soft-touch rear boot instead.
This is particularly useful in:
- Dense broadcast racks
- Video routers
- Patch panels
- Recessed bulkheads
- Outside-broadcast systems
- Touring video racks
- Equipment panels
Designed for High-Density Installations
Professional broadcast racks can contain dozens or even hundreds of BNC connections.
When neighbouring connectors are closely spaced, technicians may struggle to grip an ordinary BNC body.
The rearTWIST design makes patching considerably easier because the cable-side boot remains accessible.
That can improve:
- Installation speed
- Servicing
- Troubleshooting
- Cable changes
- Rack maintenance
without changing the familiar BNC bayonet interface.
Larger 8.0 mm Cable Version
One of the key reasons for choosing NBNC75BYY11 over other Neutrik rearTWIST models is its cable dimension.
Neutrik specifies:
Cable O.D.: 8.0 mm
This makes the connector particularly relevant to larger professional broadcast coax such as Canare L-5CFB.
Do not select a rearTWIST BNC connector based only on its appearance.
Different Neutrik BNC models use different:
- Cable O.D.
- Centre-conductor dimensions
- Dielectric dimensions
- Shield dimensions
- Crimp ferrule sizes
Correct cable-to-connector matching is essential.
8.23 mm Shield and Jacket Crimp
The NBNC75BYY11 requires:
8.23 mm hex crimp
for the shield and jacket.
Neutrik identifies this as:
IEC 60803 die designation G.
This is one of the major differences between NBNC75BYY11 and NBNC75BTU11.
The BTU11 version uses a smaller:
7.36 mm hex shield crimp.
The crimp dimensions are not interchangeable.
1.6 mm Centre-Pin Crimp
The centre contact uses:
1.6 mm square crimp
according to IEC 60803 die designation 2.
Correct centre-pin crimping is essential to achieving:
- Reliable continuity
- Proper mechanical retention
- Correct connector assembly
- Consistent cable performance
Always use the specified crimp die.
Recommended DIE-BNC-Y Tooling
For the traditional Neutrik HX-BNC crimp-tool platform, the correct die for this connector is:
DIE-BNC-Y
which provides:
- 1.6 mm centre-pin crimp
- 8.23 mm shield/jacket hex crimp
Neutrik also lists:
DIE-R-BNC-PY
for its newer HX-R-BNC crimp-tool system.
Using the correct tooling provides repeatable professional crimps and avoids damaging the connector or cable.
Compatible Canare L-5CFB
A major application for the NBNC75BYY11 is:
Canare L-5CFB 75 Ω coaxial cable.
Neutrik’s current cable-to-connector guide specifically assigns L-5CFB to NBNC75BYY11.
This makes the connector particularly useful for technicians manufacturing or repairing professional Canare video cable assemblies.
Potential applications include:
- Studio wiring
- Broadcast cables
- Video patch leads
- Rack wiring
- Touring video
- Production infrastructure
Compatible Canare L-5CFW
Neutrik also lists:
Canare L-5CFW
with NBNC75BYY11.
As with all professional coaxial cable assemblies, cable preparation and crimp tooling should follow the current manufacturer instructions.
Important Note Regarding Canare L-4.5CHWS
Neutrik’s current live NBNC75BYY11 product page also mentions:
Canare L-4.5CHWS
as a suitable cable.
However, Neutrik’s current Cable-to-Connector Guide assigns Canare L-4.5CHWS to NBNC75BTU11, using the smaller 7.36 mm shield crimp.
For professional cable manufacture, I recommend confirming the latest Neutrik cable-reference data before selecting NBNC75BYY11 for L-4.5CHWS.
For the GigLife page, the safest primary cable compatibility statement is:
Designed for Canare L-5CFB and L-5CFW according to Neutrik’s current Cable-to-Connector Guide.
NBNC75BYY11 vs NBNC75BTU11
These two connectors look very similar and share essentially the same published HD electrical performance.
The main difference is cable compatibility and shield-crimp size.
NBNC75BYY11
Cable O.D.: 8.0 mm
Shield Crimp: 8.23 mm hex
Centre Pin: 1.6 mm square
Key Current Cable Matches: Canare L-5CFB / L-5CFW
NBNC75BTU11
Cable O.D.: 7.3 mm
Shield Crimp: 7.36 mm hex
Centre Pin: 1.6 mm square
Key Cable Matches: Belden 1694A, Canare L-4.5CHD and multiple other 7.3 mm-class professional video cables
The choice between these models should therefore be made according to the exact cable being terminated—not according to brand preference or appearance.
True 75 Ω Impedance
Neutrik specifies:
Impedance: 75 Ω
for the NBNC75BYY11.
The cable, connector and equipment should all form part of a properly designed 75 Ω signal path.
A connector that simply fits mechanically is not necessarily appropriate for professional broadcast video.
Published Performance to 3 GHz
Neutrik publishes detailed VSWR and return-loss specifications for the NBNC75BYY11.
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 measurable specifications provide a much more useful indication of connector performance than generic phrases such as “excellent signal quality”.
What Return Loss Means
Return loss describes how much energy is reflected because of impedance discontinuities.
In a professional coaxial system, poorer return loss can result from:
- Incorrect connectors
- Poor crimping
- Damaged coax
- Tight cable bends
- Poor adapters
- Incorrect terminations
Higher return-loss figures represent lower reflected energy.
The true 75 Ω construction of the NBNC75BYY11 is designed to minimise the connector’s contribution to impedance mismatch.
HD-SDI Applications
The NBNC75BYY11 is part of Neutrik’s HD BNC family and is well suited to professional HD video infrastructure when paired with the correct cable.
Potential applications include:
- HD-SDI
- Broadcast HD video
- Routing systems
- Camera infrastructure
- Monitoring
- Video patching
- Professional AV
The complete cable assembly determines actual usable transmission distance and format performance.
3G-SDI Considerations
The current GigLife listing includes 3G-SDI as an application.
That can remain as a qualified professional use case because Neutrik publishes the connector’s electrical performance through 3 GHz.
However, the connector alone cannot guarantee successful 3G-SDI transmission.
The complete assembly must also consider:
- Cable type
- Cable length
- Crimp quality
- Connector installation
- Number of intermediate connections
- Equipment characteristics
For critical video systems, test completed cables at the intended signal format.
HD – Not Neutrik UHD
The NBNC75BYY11 belongs to Neutrik’s:
rearTWIST HD
range.
It should not be marketed as one of Neutrik’s dedicated:
rearTWIST UHD
connectors unless the exact UHD model is being supplied.
Neutrik’s UHD connectors use different centre-contact and dielectric geometry to provide improved return-loss headroom for 4K and 8K applications.
Do Not Automatically Claim 4K or 8K
Avoid describing the NBNC75BYY11 as a dedicated:
- 6G-SDI connector
- 12G-SDI connector
- 4K BNC connector
- 8K BNC connector
unless the complete cable assembly has been engineered and validated for that application.
Neutrik specifically markets its UHD rearTWIST X-series products for high-resolution 4K/8K signal transmission.
NBNC75BYY11 is the HD version.
No Direct BYY11X Equivalent in Current Cable Guide
Neutrik’s current Cable-to-Connector Guide lists NBNC75BYY11 as the HD connector for Canare L-5CFB and L-5CFW.
It does not currently list a direct NBNC75BYY11X UHD equivalent for those cables.
This is another reason not to invent or imply an “X” version of this exact model.
For a UHD system, select the connector that Neutrik specifically approves for the chosen UHD-rated coaxial cable.
Precision Swiss-Machined Brass Construction
Neutrik uses precision-machined brass parts throughout the connector.
The current specification identifies:
Centre Contact: Brass CuZn35Pb2
Shell: Brass CuZn39Pb3
Precise machining helps maintain the geometry required for consistent 75 Ω high-frequency performance.
Gold-Plated Centre Contact
The centre contact uses:
0.2 µm AuCo gold plating.
This creates a stable professional contact interface within the signal path.
PTFE Insert
The dielectric insert is manufactured from:
PTFE.
The insert is a critical part of the BNC’s impedance geometry.
In high-frequency coaxial connectors, changes to dielectric geometry can directly affect the electrical performance of the connection.
Optalloy Shell Finish
Neutrik specifies:
Shell Plating: Optalloy
for NBNC75BYY11.
This forms the outer mechanical and electrical interface of the connector.
Snug-Fit Centre-Pin Insert
Neutrik incorporates a snug-fit centre-pin design that gives tactile feedback when the centre pin is correctly seated.
This can help cable technicians confirm proper assembly before completing the connector.
For workshop production, these small mechanical feedback features help improve consistency across large cable batches.
Shield and Jacket Crimp Technology
The rearTWIST BNC design crimps both the shield and outer jacket.
Neutrik specifically highlights that this avoids the problem of exposed grounding braid around completed assemblies.
The design also contributes to:
- Cable retention
- Strain relief
- Shield continuity
- Professional finished appearance
More Than 30 N Cable Retention
Neutrik specifies:
Cable Retention: >30 N at the centre
for the NBNC75BYY11.
Actual retention depends on the connector being assembled with:
- Correct cable
- Correct strip dimensions
- Correct crimp die
- Correct crimp tool
Less Than 25 N Insertion Force
Neutrik specifies:
Insertion Force: <25 N.
The familiar bayonet mechanism provides positive mechanical locking while allowing fast professional patching.
More Than 1,000 Mating Cycles
Neutrik specifies:
Lifetime: >1,000 mating cycles.
This makes the connector particularly suitable for equipment and cables that are frequently patched during:
- Touring
- Broadcast
- Film and television
- Equipment hire
- Live events
- OB production
Inner and Outer Contact Resistance
Neutrik specifies:
Inner Contact Resistance: ≤3 mΩ
Outer Contact Resistance: ≤2 mΩ
These values form part of the connector’s professional electrical specification.
Insulation Resistance
Neutrik specifies:
Insulation Resistance: >5 GΩ.
This provides electrical isolation between the centre conductor and shield.
Dielectric Strength
Neutrik specifies:
Dielectric Strength: 1.5 kV DC.
This is a test specification and should not be confused with the operating voltage of the signal system.
Rated Below 50 V
The published rated voltage is:
<50 V.
The NBNC75BYY11 is intended for professional video and signal systems.
It is not a connector for mains-power distribution.
Temperature Range
Neutrik specifies:
-30°C to +85°C.
The finished cable assembly may have different environmental limits according to the coaxial cable itself.
Broadcast Television
Professional broadcast remains one of the strongest applications for true 75 Ω BNC cabling.
Potential uses include:
- Camera feeds
- Video routing
- Monitoring
- Distribution
- Patch systems
- Broadcast racks
- Production control
- Studio infrastructure
The rearTWIST system is particularly valuable in racks where numerous BNC connections sit close together.
Outside Broadcast
OB trucks and broadcast flypacks often have extremely dense BNC infrastructure.
rearTWIST allows technicians to manipulate the connector from behind its head, which can be much easier when neighbouring connectors limit access.
Applications may include:
- Camera feeds
- Monitoring
- Replay systems
- Router connections
- Vision switching
- Recording
- Distribution
Film and Television
Professional film and television systems may use coaxial video throughout:
- Studios
- Production stages
- Camera systems
- Monitoring
- Video villages
- Routing racks
- Recording systems
A properly assembled true 75 Ω cable provides the predictable interface required by professional video equipment.
Live Event Video
Modern live events rely heavily on professional video.
Potential applications include:
- IMAG systems
- Cameras
- Vision mixers
- LED processors
- Recorders
- Routers
- Distribution
- Monitoring
The NBNC75BYY11 allows technicians to manufacture professional coax cables for compatible systems using the specified larger-diameter Canare cables.
Touring Video
Touring video cables undergo repeated:
- Coiling
- Deployment
- Patching
- Transport
- Reconnection
The NBNC75BYY11 combines professional high-frequency performance with mechanical features specifically designed for this kind of working environment.
Equipment-Hire Companies
Equipment-hire companies can use the NBNC75BYY11 when:
- Manufacturing new video cables
- Repairing damaged cable inventory
- Standardising Canare L-5CFB cables
- Maintaining OB/video packages
- Preparing touring systems
Correctly matching connector model to cable type is particularly important in large rental inventories.
Professional AV
Permanent and temporary professional AV systems may use 75 Ω BNC for:
- SDI distribution
- Monitoring
- Video routing
- Camera feeds
- Production video
- Broadcast integration
The NBNC75BYY11 provides a professional connection option where its approved cable dimensions match the installed coax.
Optional Colour-Coded Boots
Neutrik’s BST-BNC rearTWIST boots are available in multiple colours.
Colour coding can help identify cables by:
- Length
- Camera number
- Signal type
- Destination
- Department
- Production
- Ownership
This can be extremely helpful in broadcast and touring environments containing large quantities of otherwise identical black coax.
Cable Preparation Matters
Professional BNC performance depends on more than the connector model.
During cable assembly:
- Confirm the cable is approved for the connector.
- Use the correct stripping dimensions.
- Do not damage the centre conductor.
- Keep the dielectric geometry intact.
- Avoid loose braid strands.
- Fully seat the centre contact.
- Use the correct 1.6 mm centre-pin crimp.
- Use the correct 8.23 mm shield/jacket crimp.
- Inspect the finished assembly.
- Test the completed cable.
Avoid Tight Cable Bends
Coaxial cable relies on controlled physical geometry to maintain 75 Ω impedance.
Crushing, excessive tie pressure or tight bends can alter that geometry.
Always follow the cable manufacturer’s minimum bend radius.
Test Every Completed Cable
New or repaired professional video cables should be tested before entering production inventory.
At minimum check:
- Centre conductor continuity
- Shield continuity
- No centre-to-shield short
- Mechanical retention
- Correct connector assembly
- Bayonet locking action
For high-data-rate SDI, appropriate signal or cable testing is strongly recommended.
Product Specifications
Brand: Neutrik
Model: NBNC75BYY11
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.: 8.0 mm
Centre-Pin Crimp: 1.6 mm square
Shield/Jacket Crimp: 8.23 mm hex
Cable Anchoring: Jacket crimping
Cable Retention: >30 N
Insertion Force: <25 N
Mechanical Life: >1,000 mating cycles
Inner Contact Resistance: ≤3 mΩ
Outer Contact Resistance: ≤2 mΩ
Insulation Resistance: >5 GΩ
Dielectric Strength: 1.5 kV DC
Rated Voltage: <50 V
Return Loss to 1 GHz: >32 dB
Return Loss to 2 GHz: >30 dB
Return Loss to 3 GHz: >26 dB
Centre Contact: Brass CuZn35Pb2
Centre Contact Plating: 0.2 µm AuCo gold
Insert: PTFE
Shell: Brass CuZn39Pb3
Shell Plating: Optalloy
Temperature Range: -30°C to +85°C
Crimpability: IEC 60803 / IEC 60352-2 compliant
Recommended Cable Compatibility
Based on Neutrik’s current Cable-to-Connector Guide:
- Canare L-5CFB
- Canare L-5CFW
Note: Neutrik’s individual NBNC75BYY11 product page also currently names Canare L-4.5CHWS, while the current Cable-to-Connector Guide assigns L-4.5CHWS to NBNC75BTU11. Confirm current manufacturer guidance before using NBNC75BYY11 with L-4.5CHWS.
Recommended Neutrik Tooling
HX-BNC: Crimp-tool frame
DIE-BNC-Y: 1.6 mm centre-pin / 8.23 mm shield-jacket crimp die
HX-R-BNC: Current rear-series crimp-tool platform
DIE-R-BNC-PY: Rear-series 1.6 mm / 8.23 mm compatible die
CS-BNC-RT: Coaxial cable stripper for 4.0–8.0 mm cable O.D.
BST-BNC: Optional coloured rearTWIST boots
CAS-BNC-T: BNC assembly tool kit
Why Choose the Neutrik NBNC75BYY11?
Choose the NBNC75BYY11 where professional video cable manufacture requires:
- Genuine Neutrik quality
- True 75 Ω construction
- rearTWIST HD design
- 8.0 mm cable compatibility
- 8.23 mm shield crimp
- 1.6 mm centre-pin crimp
- Canare L-5CFB compatibility
- Canare L-5CFW compatibility
- Published electrical performance through 3 GHz
- Easy operation in dense BNC panels
- Gold-plated centre contact
- Precision-machined brass construction
- PTFE insulation
- More than 1,000 mating cycles
- Professional broadcast and touring suitability
It is especially useful where larger Canare 75 Ω coaxial cable is being used and the ease of rearTWIST operation is valuable in high-density professional video systems.
Why Buy Neutrik NBNC75BYY11 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 video systems depend on correctly matching the cable, connector and tooling—not simply choosing a BNC that physically fits.
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 L-5CFB cables, repairing professional SDI inventory, wiring a broadcast rack or restocking a video workshop, GigLife supplies genuine 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.
