Product Description
Professional 12G UHD-SDI Performance in a Compact Cable
AV-Cables Belden 4855R 12G UHD-SDI BNC cables provide professional broadcast performance in a lightweight, flexible Mini RG59 construction. They are designed for uncompressed 4K UHD video connections in equipment racks, studios, fly packs, production trucks and other systems where reliable signal transmission and compact cable routing are essential.
Each assembly uses genuine Belden 4855R 12 GHz, 75-ohm Mini RG59 coaxial cable and precision 12G-rated 75-ohm BNC male connectors. Every completed cable is hand assembled and individually tested in the USA before shipment.
Professional compact 12G-SDI construction: Belden 4855R provides full 12G-SDI performance in a lightweight 4.5 mm Mini RG59 cable. Precision 75-ohm BNC connectors provide secure professional connections for compatible cameras, switchers, routers, monitors, converters and other broadcast equipment.
Belden 4855R Key Features
- Genuine Belden 4855R 12 GHz broadcast coaxial cable
- Professional precision 75-ohm BNC male connectors
- BNC male-to-BNC male configuration
- 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
- Flexible and lightweight for high-density installations
- Ideal for short and medium professional SDI connections
- Standard and custom lengths available
- Multiple jacket colors available
- Hand assembled in the USA
- Every completed cable is individually tested
- Lifetime Connector Replacement Warranty
Why Choose Belden 4855R Mini RG59?
With an outside diameter of approximately 4.5 mm, Belden 4855R is substantially smaller and lighter than standard RG59 or RG6 broadcast cable. It is an excellent choice for professional SDI connections where limited rack space, reduced cable weight and easy routing are important.
The compact construction is especially useful behind densely populated routers, patch panels, switchers and monitors. It also helps reduce cable weight in fly packs, mobile production trucks and portable broadcast systems.
Belden 4855R provides professional 12G-SDI performance without the bulk of larger coaxial cables. For unusually long 12G-SDI connections, a larger RG59 or RG6 cable may provide additional transmission distance.
Recommended Applications
- Broadcast television studios and control rooms
- 4K UHD cameras and camera-control systems
- Production switchers and video routers
- Professional monitors and multiviewers
- Video converters and signal processors
- High-density equipment racks and patch panels
- Mobile production trucks and fly packs
- Live production and sports broadcasting
- Corporate AV and commercial video installations
- Houses of worship and educational facilities
- Cinema and post-production systems
- Government, OEM and systems-integration projects
Need a longer 12G-SDI cable run? Belden 4855R is optimized for lightweight, compact routing. For longer 12G-SDI distances, consider a larger Belden 4505R RG59 or Belden 4694R RG6 cable.
Supported SDI Formats and SMPTE Standards
This professional 75-ohm BNC cable supports compatible SD-SDI, HD-SDI, 3G-SDI, 6G-SDI and 12G-SDI video 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 strong performance for a miniature coaxial cable. 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.
Belden 4855R Compared with Larger SDI Cables
Different Belden broadcast cable models are optimized for different combinations of cable size, flexibility and transmission distance.
| Feature | Belden 4855R | Belden 4505R | Belden 4694R |
|---|---|---|---|
| Cable construction | Mini RG59 | Full-size RG59 | RG6 |
| Approximate diameter | 4.5 mm | 5.9 mm | Larger RG6 construction |
| Primary advantage | Lightweight and compact | Balance of flexibility and distance | Long-distance 12G performance |
| Best application | Racks, fly packs and short-to-medium runs | Studios and medium-distance runs | Long broadcast and venue runs |
Belden 4855R Technical Specifications
| Cable manufacturer | Belden |
| Cable model | 4855R |
| Cable construction | Mini RG59 precision broadcast-video 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 | Precision 75-ohm BNC male to 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 ranging from short rack and patch-panel connections through longer studio and production runs. Custom lengths are available when a standard option does not fit your installation.
Jacket color options include black, blue, red, yellow, green, violet and white. Color availability may vary by selected length and current material inventory.
Need matching colors or custom lengths? Contact AV-Cables for color-coded cable sets, equipment-rack packages, custom labeling, production quantities and other project-specific requirements.
Compatible Professional Video Equipment
These 75-ohm BNC cable assemblies can be used with compatible SDI 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 that your equipment uses a standard 75-ohm BNC connection and supports the intended SDI format. Manufacturer names are used only to describe potential equipment compatibility.
Hand Assembled and Individually Tested
AV-Cables has served professional audio, video and broadcast customers since 1995. Experienced technicians assemble each Belden 4855R cable using professional termination methods and individually test the completed assembly before shipment.
Eligible AV-Cables signal cables include our Lifetime Connector Replacement Warranty. If a connector fails during normal service, contact us for warranty assistance.
Why Choose AV-Cables?
AV-Cables manufactures professional broadcast and video cable assemblies using components from trusted professional brands. This 12G-SDI cable combines genuine Belden 4855R coax with precision 75-ohm BNC connectors for dependable performance in professional HD and 4K UHD video systems.
- Genuine Belden 4855R 12 GHz cable
- Precision 12G-rated 75-ohm BNC 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 Professional SDI BNC Cable category.
Belden 4855R 12G-SDI Cable FAQs
Does Belden 4855R support 12G-SDI and 4K UHD?
Yes. Belden 4855R is a 12 GHz professional broadcast cable designed for compatible 12G-SDI and uncompressed 4K UHD video systems.
Can this cable carry 3G-SDI or 6G-SDI?
Yes. The cable is backward compatible with compatible SD-SDI, HD-SDI, 3G-SDI and 6G-SDI equipment using standard 75-ohm BNC connections.
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, fly packs, mobile production systems and behind equipment with limited space.
What is the difference between Belden 4855R and 4505R?
Belden 4855R is a lightweight Mini RG59 cable with an outside diameter of approximately 4.5 mm. Belden 4505R is a larger full-size RG59 cable that may provide additional transmission distance but requires more routing space.
Is this a true 75-ohm BNC cable?
Yes. This assembly uses genuine 75-ohm Belden 4855R coax and precision 75-ohm BNC male connectors.
Which jacket colors are available?
Standard jacket-color options include black, blue, red, yellow, green, violet and white. 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.
