BNC RCA Connector — Coaxial RF Video Audio Socket Female Male PCB Panel Mount
BNC & RCA Connectors — Coaxial RF, Video & Audio Sockets for CCTV, SDI, RF & Audio Applications
This collection covers two essential coaxial connector families used across professional video, RF, and audio applications: BNC (Bayonet Neill–Concelman) connectors for RF, CCTV, and SDI video, and RCA (phono) connectors for composite video and analog audio. Both connector types are available in PCB-mount and panel-mount configurations, in female (jack/socket) and male (plug) variants, with gold-plated contacts for reliable signal transmission.
BNC Connector Reference Guide
The BNC connector is a bayonet-lock coaxial connector used for RF signals, CCTV/analog video, SDI (Serial Digital Interface) broadcast video, oscilloscope probes, and test equipment. The bayonet locking mechanism provides secure, vibration-resistant connections that can be made and released with a quarter-turn. BNC connectors are available in 50Ω (for RF and data applications) and 75Ω (for video and broadcast applications) impedance variants — physically identical but electrically different.
- BNC female PCB mount: Right-angle DIP, vertical DIP, SMT — for PCB-integrated RF/video input/output ports
- BNC female panel mount: Bulkhead-mount with nut, for chassis-mounted BNC ports on enclosures and equipment panels
- BNC male plug: For cable assembly and termination of RG58 (50Ω) and RG59/RG6 (75Ω) coaxial cable
- BNC T-adapter, barrel connector, terminator: For network and test equipment signal routing and termination
RCA Connector Reference Guide
The RCA connector (also called phono connector) is the standard for composite video and analog audio connections in consumer electronics, professional AV equipment, and home theater systems. RCA connectors use a center pin for signal and an outer ring for ground, with color coding: yellow (composite video), white (left audio), red (right audio). Also used for S/PDIF digital audio (orange/black) and component video (red/green/blue).
- RCA female PCB mount: Single, dual (stereo), triple (composite + stereo audio), and quad configurations; DIP and SMT mounting
- RCA female panel mount: Bulkhead-mount with nut, available in single and multi-port configurations; color-coded variants
- RCA male plug: For cable assembly; available in standard and gold-plated variants
Key Technical Specifications
- BNC impedance: 50Ω (RF/data) or 75Ω (video/broadcast)
- BNC frequency rating: DC to 4GHz (standard) / DC to 11GHz (precision)
- RCA frequency rating: DC to 100MHz (composite video) / DC to 10MHz (audio)
- Contact material: Brass or phosphor bronze, gold-plated
- Dielectric: PTFE (BNC precision) / polyethylene (standard)
- Mating cycles: ≥1,000 (BNC) / ≥1,500 (RCA)
- Certifications: CE, RoHS
Complete Product Range in This Collection
This collection includes: BNC female PCB jacks (right-angle DIP, vertical DIP, SMT — 50Ω and 75Ω), BNC female panel mount bulkheads (50Ω and 75Ω, with nut), BNC male plugs (for RG58 and RG59/RG6 cable), BNC adapters (T-adapter, barrel, 75Ω terminator), RCA female PCB jacks (single, dual stereo, triple AV, quad — DIP and SMT), RCA female panel mount sockets (single and multi-port, color-coded), and RCA male plugs (standard and gold-plated, for cable assembly).
Ideal Applications
- BNC 75Ω: CCTV/analog security camera video connections; SDI (SD-SDI, HD-SDI, 3G-SDI) broadcast video; composite video distribution; cable TV (CATV) equipment
- BNC 50Ω: RF test equipment (oscilloscopes, signal generators, spectrum analyzers); amateur radio and antenna connections; Ethernet 10BASE2 (legacy); GPS and wireless antenna connections
- RCA composite video: DVD player, VCR, and legacy AV equipment connections; CCTV DVR video output; composite video distribution amplifiers
- RCA audio: Amplifier and preamplifier audio connections; home theater AV receiver inputs/outputs; turntable phono connections; S/PDIF digital audio
BNC & RCA Connector Buying Guide
Step 1 — BNC 50Ω vs 75Ω: For CCTV and video applications, always use 75Ω BNC connectors and cable. For RF test equipment and antenna connections, use 50Ω. Mixing impedances causes signal reflections and degraded performance. The connectors are physically identical — verify the impedance specification before ordering.
Step 2 — PCB mount vs panel mount: PCB mount jacks (right-angle or vertical DIP, SMT) are soldered directly to the PCB. Panel mount bulkheads are installed in chassis cutouts with a nut, providing an external-facing connector port. Choose based on your enclosure design.
Step 3 — RCA color coding: Standard color coding: yellow = composite video, white = left audio (mono), red = right audio. For component video: red = Pr/Cr, green = Y, blue = Pb/Cb. For S/PDIF: orange or black. Use color-coded panel mount sockets for user-facing AV panels.
Step 4 — Gold plating: Gold-plated contacts provide superior corrosion resistance and lower contact resistance, particularly important for audio applications where oxidation can degrade signal quality. Recommended for all audio and video connections.
Why Choose Yoeruyo for BNC & RCA Connectors?
Yoeruyo stocks the complete BNC and RCA connector range — PCB mount, panel mount, male plugs, and adapters — in both 50Ω and 75Ω BNC variants and standard/gold-plated RCA variants. CE and RoHS certified. Available from 5pcs for prototyping to 500pcs+ for production.
Frequently Asked Questions
Q: What is the difference between 50Ω and 75Ω BNC connectors?
A: Both are physically identical and will mate with each other, but they have different internal geometries optimized for different impedances. 50Ω is for RF and data applications; 75Ω is for video and broadcast. Mixing impedances causes impedance mismatch, signal reflections, and degraded performance. Always match connector and cable impedance.
Q: Can BNC connectors be used for HD-SDI and 3G-SDI video?
A: Yes. 75Ω BNC connectors are the standard for all SDI formats including SD-SDI (270Mbps), HD-SDI (1.485Gbps), and 3G-SDI (2.97Gbps). For 6G-SDI and 12G-SDI, use precision BNC connectors rated to the required frequency.
Q: Are RCA and phono connectors the same?
A: Yes. RCA connector and phono connector are two names for the same connector type. "RCA" refers to the Radio Corporation of America, which popularized the connector. "Phono" refers to its original use for phonograph (turntable) connections.
Q: Can I use RCA connectors for S/PDIF digital audio?
A: Yes. S/PDIF (Sony/Philips Digital Interface) uses standard RCA connectors (typically orange or black color coding) with 75Ω coaxial cable. The same physical RCA connector is used for both analog audio and S/PDIF digital audio.
Q: What coaxial cable is compatible with BNC connectors?
A: 50Ω BNC connectors use RG58 coaxial cable. 75Ω BNC connectors use RG59 (standard CCTV) or RG6 (higher quality, longer runs) coaxial cable. Always match cable impedance to connector impedance.
