BNC Male Connector for RG58 / RG142 / RG223 / RG400 / LMR195 / RFC195 cables

BNC Male 75 Ohm Connector is a widely used RF (Radio Frequency) coaxial connector designed for applications requiring a characteristic impedance of 75 ohms, primarily in video, broadcast, and telecommunications. This male connector features a bayonet-style coupling mechanism, allowing for quick and secure connection and disconnection. It is specifically engineered for compatibility with a range of popular coaxial cables, including RG58, RG142, RG223, RG400, LMR195, and RFC195. While RG58 is typically a 50 Ohm cable, certain 75 Ohm BNC connectors are designed to accommodate it, though it’s crucial to match impedance for optimal performance, especially at higher frequencies. These connectors often utilize crimp or solder attachment methods for the center pin and outer braid, ensuring reliable signal transmission and robust physical connection. Constructed with materials like brass with nickel plating for the body and gold-plated brass or phosphor bronze for the center contact, they provide good electrical performance with low insertion loss and excellent return loss for frequencies typically up to 1 GHz, with some “True 75 Ohm” versions performing effectively up to 3 GHz or even 12G SDI for 4K/Ultra-HD video.

Technical Specification

BNC Male 75 Ohm Connector (General Specifications):

Connector Type: BNC Male (Plug)
Impedance: 75 Ohms ( $Ω$ )
Frequency Range:
- Standard: DC to 1 GHz (some up to 4 GHz with increasing VSWR)
- True 75 Ohm / HDTV Grade: DC to 3 GHz (up to 6 GHz for some specialized versions, especially for 12G-SDI applications)
VSWR (Voltage Standing Wave Ratio):
- Typically $\leq 1.05 : 1$ up to 1 GHz
- $\leq 1.10 : 1$ up to 3 GHz (for true 75 Ohm connectors)
Insertion Loss: Low, typically $< 0.2$ dB at 1 GHz
Return Loss: High, typically $> 26$ dB up to 3 GHz (for true 75 Ohm connectors)
Dielectric Withstanding Voltage: $1500$ V RMS (at sea level)
Working Voltage: $500$ V RMS (at sea level)
Insulation Resistance: $\geq 5000$ M$\Omega$
Contact Resistance:
- Center Contact: $\leq 3$ m$\Omega$
- Outer Contact: $\leq 2$ m$\Omega$
Durability (Mating Cycles): $\geq 500$ (standard), $\geq 1000$ (for HDTV versions)
Coupling Mechanism: Bayonet (quick disconnect)
Cable Attachment Method:
- Typically Crimp (for outer braid/ferrule) and Solder (for center pin)
- Some versions may use clamp or twist-on.
Materials:
- Body: Brass (Nickel plated)
- Center Contact: Brass or Phosphor Bronze (Gold plated)
- Insulators: PTFE (Teflon) or PE
- Crimp Ferrule: Copper (Nickel plated)
Operating Temperature Range: Typically $- 5 5^{\circ}$ C to $+ 16 5^{\circ}$ C (Teflon insulated), $- 4 0^{\circ}$ C to $+ 8 5^{\circ}$ C (PE or Delrin insulated)