Product Description
Professional 12G-SDI HD-BNC to BNC Cable
The AV-Cables 12G UHD-SDI HD-BNC to BNC Cable provides a direct connection between professional video equipment using a compact HD-BNC port and equipment using a standard BNC port.
Each assembly is built with genuine Belden 4855R 12 GHz, 75-ohm Mini RG59 coaxial cable, one precision HD-BNC male connector and one precision standard BNC male connector. Every completed cable is hand assembled and individually tested in the USA before shipment.
12G HD-BNC to BNC Cable Key Features
- Genuine Belden 4855R 12 GHz broadcast coaxial cable
- HD-BNC male to standard BNC male configuration
- Precision 12G-rated 75-ohm connectors
- True 75-ohm cable and connector signal path
- Supports SD-SDI through 12G-SDI video formats
- Designed for uncompressed 4K UHD video transmission
- Compact 4.5 mm Mini RG59 construction
- 23 AWG solid silver-plated copper center conductor
- Foil shield with 95% tinned-copper braid coverage
- Lightweight and flexible for high-density installations
- Standard and custom lengths available
- Multiple jacket colors available
- Hand assembled and individually tested in the USA
- Lifetime Connector Replacement Warranty
Connect High-Density and Standard BNC Equipment
HD-BNC is a compact professional 75-ohm connector used on broadcast equipment that requires more video connections in a limited amount of panel space. Standard BNC remains widely used on cameras, switchers, monitors, converters and other professional video equipment.
This HD-BNC-to-BNC cable connects those two different interfaces while maintaining a professional 75-ohm signal path. It is an excellent choice when one device has an HD-BNC port and the other has a traditional BNC port.
Belden 4855R has an outside diameter of approximately 4.5 mm, making it smaller and lighter than full-size RG59 or RG6. Its compact construction simplifies routing through crowded equipment racks, mobile production trucks, fly packs and camera systems.
Recommended Applications
- HD-BNC video routers to standard BNC equipment
- High-density patch panels
- Broadcast television studios and control rooms
- 4K UHD production switchers
- Professional cameras and camera systems
- Broadcast monitors and multiviewers
- Video converters and signal processors
- Mobile production trucks
- Fly packs and portable production systems
- Post-production and editing systems
- Live production and sports broadcasting
- Corporate AV installations
- Government and OEM systems
- Professional rack-to-rack video connections
Supported SDI Formats and SMPTE Standards
This professional 75-ohm cable supports compatible SD-SDI, HD-SDI, 3G-SDI, 6G-SDI and 12G-SDI equipment.
| SDI Format | Typical Video Application | Applicable Standard |
|---|---|---|
| 12G-SDI | Single-link 4K UHD video | SMPTE ST 2082-1 |
| 6G-SDI | 4K UHD video | SMPTE ST 2081-1 |
| 3G-SDI | 1080p HD video | SMPTE 424M |
| HD-SDI | Professional HD video | SMPTE 292M |
| SD-SDI | Standard-definition serial digital video | SMPTE 259M |
Approximate SDI Transmission Distances
Belden 4855R provides professional SDI performance in a compact Mini RG59 design. Lower-data-rate SDI formats generally support longer cable runs than 12G-SDI.
| SDI Format | Typical Application | Approximate Maximum Distance |
|---|---|---|
| 12G-SDI | 4K UHD video | Up to approximately 150 feet |
| 6G-SDI | 4K UHD video | Up to approximately 215 feet |
| 3G-SDI | 1080p HD video | Up to approximately 300 feet |
Transmission distances are approximate. Actual performance depends on the connected equipment, video format, connectors, patch points, installation conditions and total signal path. Contact AV-Cables before ordering for a critical or unusually long cable run.
HD-BNC vs. Standard BNC
HD-BNC and standard BNC can both provide professional 75-ohm SDI performance, but they use different connector sizes and are not directly interchangeable.
| Feature | HD-BNC | Standard BNC |
|---|---|---|
| Nominal impedance | 75 ohms | 75 ohms with professional video connectors |
| Connector size | Compact high-density design | Traditional full-size design |
| Connection style | Bayonet-style locking connection | Bayonet-style locking connection |
| Primary advantage | More connections in limited panel space | Widely used traditional broadcast interface |
| Directly interchangeable? | No—requires a matching HD-BNC port | No—requires a matching standard BNC port |
Belden 4855R Cable Specifications
| Specification | Details |
|---|---|
| Cable manufacturer | Belden |
| Cable model | 4855R |
| Cable construction | Mini RG59 precision broadcast coax |
| Rated bandwidth | 12 GHz |
| Nominal impedance | 75 ohms |
| Center conductor | 23 AWG solid silver-plated copper |
| Shielding | Foil shield with 95% tinned-copper braid |
| Outside diameter | Approximately 4.5 mm / 0.177 inches |
| Jacket | PVC, CMR rated |
| Connector configuration | 75-ohm HD-BNC male to standard BNC male |
| Signal compatibility | SD, HD, 3G, 6G and 12G-SDI |
| Maximum video format | Up to 4K UHD |
| SMPTE standards | SMPTE 259M, 292M, 424M, ST 2081-1 and ST 2082-1 |
| Assembly | Hand assembled in the USA |
| Testing | Every completed cable is individually tested |
| Warranty | Lifetime Connector Replacement Warranty |
Available Lengths and Jacket Colors
Choose from standard lengths for short equipment connections, rack wiring, production systems and longer studio runs. Custom lengths are available when a standard option does not fit your installation.
Multiple jacket colors are available for cable identification, signal-path organization and equipment grouping. Color availability may vary by selected length and current material inventory.
Compatible Professional Video Equipment
This cable can connect compatible HD-BNC and standard BNC equipment from manufacturers such as Blackmagic Design, Sony, Ross Video, Grass Valley, Panasonic, Canon, AJA Video Systems, FOR-A, Evertz, Imagine Communications, TVLogic, Marshall Electronics, Leader, Tektronix and Decimator Design.
Confirm the connector type and supported SDI format on both devices before ordering. Manufacturer names are used only to describe potential equipment compatibility.
Why Choose AV-Cables?
AV-Cables manufactures professional audio, video and broadcast cable assemblies using components from trusted professional brands. This assembly combines genuine Belden 4855R Mini RG59 coax with precision 12G-rated HD-BNC and standard BNC connectors.
- Genuine Belden 4855R 12 GHz broadcast cable
- Precision 12G-rated 75-ohm connectors
- Hand assembled in the USA
- Every completed cable is individually tested
- Standard and custom lengths available
- Multiple jacket colors available
- Custom labeling and matching cable sets available
- Volume production for broadcasters, integrators and OEM customers
- Lifetime Connector Replacement Warranty
Need a custom length, jacket color, labeling option or multiple matching cables? Contact AV-Cables for a custom quote.
View additional products in our HD-BNC Cable category.
12G HD-BNC to BNC Cable FAQs
What connectors are installed on this cable?
This cable has one precision 75-ohm male HD-BNC connector and one precision 75-ohm male standard BNC connector.
Is HD-BNC the same as standard BNC?
No. HD-BNC is a smaller high-density connector. HD-BNC and standard BNC have different physical sizes and cannot be connected directly to each other.
Does this cable support 12G-SDI and 4K UHD?
Yes. This assembly uses genuine Belden 4855R 12 GHz coax and precision 12G-rated connectors for compatible 12G-SDI and 4K UHD equipment.
Can this cable carry 3G-SDI or 6G-SDI?
Yes. It is backward compatible with compatible SD-SDI, HD-SDI, 3G-SDI and 6G-SDI equipment.
How far can Belden 4855R carry a 12G-SDI signal?
Belden 4855R can typically support 12G-SDI distances up to approximately 150 feet. Actual performance depends on the connected equipment, video format, connectors, patch points, installation conditions and total signal path.
Why should I choose Mini RG59?
Mini RG59 is a strong choice when flexibility, reduced cable weight and compact routing are important. Its smaller diameter is particularly useful in high-density racks, routers, patch panels, fly packs and mobile production systems.
Are multiple jacket colors available?
Yes. Multiple jacket colors are available for cable identification and signal-path organization. Availability may vary by selected length and current material inventory.
Are custom lengths available?
Yes. AV-Cables can manufacture custom lengths, matching cable sets and production quantities for studios, broadcast facilities, production companies, integrators, government installations and OEM projects.
