Part Number: SMA3100-0316 — a straight SMA plug (conventional male, with male pin) terminated by crimping the ferrule to the cable braid and soldering the centre pin to the inner conductor. Designed for the popular small-diameter 50 Ω cables RG174, RG188, RG316 and RG316-FEP, it suits test leads, jumpers, instrumentation patch cables and any build where flexibility and a compact footprint matter more than power handling.

The MIL-STD-348B interface is mechanically compatible with 2.92 mm and 3.5 mm connectors, so it can be mated into precision test fittings as well as standard SMA. Construction is brass body, ferrule, contact pin and coupling nut with gold-over-nickel-phosphorous plating, a beryllium copper retainer ring, silicone gasket and PTFE insulator.

• Cable compatibility: RG174, RG188, RG316, RG316-FEP (~Ø2.5 mm jacket)
• Frequency / VSWR: DC to 12.4 GHz, VSWR ≤ 1.25 across the band
• Impedance: 50 Ω; insertion loss ≤ 0.04 × √f(GHz) dB
• Voltage: 250 V rms working, 750 V rms dielectric withstanding (sea level)
• Mechanical: 8 mm hex coupling nut, 15.6 mm overall, 3.06 g; ≥ 100 mating cycles; recommended torque 4 in·lb
• Environmental: −65 °C to +165 °C; tested to MIL-STD-202 methods 101/106/107; RoHS compliant

Tooling. Use crimp tool CRT-1 or CRT-2 with INSERT-A on the ferrule, and an ST-0.4 soldering gauge for the centre pin. If you’d rather not build them yourself, we make these up as custom cable assemblies — just send the cable, length and end connectors and we’ll quote.

How to choose. Pick this part if you need a straight, conventional-polarity SMA plug for a small-diameter 50 Ω cable up to 12.4 GHz. If your build needs a right-angle exit, see SMA3100-9316; for the female (jack) end, see SMA8100-0316; for reverse-polarity (used on most consumer Wi-Fi gear), see SMA6100-0316 (RP-SMA plug) or SMA9100-0316 (RP-SMA jack). Note that plug = threaded coupling nut with male pin and jack = fixed body with female socket — if you’re unsure, see our connector identification guide.

DATASHEET