RF Coaxial Connectors | BNC (GJB681A / MIL-C-39012)

BNC Series RF Coaxial Connector

The BNC series is a bayonet-locking 50 Ω RF coaxial connector known for fast connection and reliable contact, widely used in radio equipment and electronic instruments. It operates from DC to 4 GHz with very low contact resistance (inner ≤ 1.5 mΩ, outer ≤ 0.2 mΩ) and 1500 V dielectric withstand. The two-stud bayonet coupling gives quick, repeatable mating in test and instrumentation environments.

Key Specifications

Impedance 50 Ohm

Frequency DC - 4 GHz

Coupling Bayonet

Executive Standard	GJB681A (MIL-C-39012)
Impedance	50 Ω
Frequency Range	DC–4 GHz
Coupling	Bayonet locking
Inner Contact	Pin: brass, gold plated / Socket: phosphor bronze or beryllium copper, gold plated
Body Material	Brass, nickel plated
Insulator	PTFE
Contact Resistance	Inner ≤ 1.5 mΩ; outer ≤ 0.2 mΩ
Insulation Resistance	≥ 5000 MΩ
Dielectric Withstanding Voltage	1500 V
VSWR	≤ 1.3
Mechanical Endurance	500 mating cycles