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31-212 — Amphenol product photo
Amphenol

Amphenol RF 31-212 BNC Plug, 50 Ohm, 4 GHz

MPN31-212
Active

Amphenol RF BNC series, 31-212, Plug Male Pin, 50Ohm, 4GHz, 500V, Bayonet Lock, Solder Termination, Silver Center Contact, Bulk.

$9.6200Ref. price · indicative, final on quote
31-212 datasheet
StockContact for availability
MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
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Specifications

31-212 Technical Specifications
ParameterValue
Mounting typeFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupRG-59, 59B, 62, 140, 210, Belden 8241, 8263, 8279, 9209
Operating temperature-65°C~165°C
Body materialBrass
Housing colorSilver
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialBrass
PackageBulk
Includes7 pcs - 1 Connector, 1 Braid Clamp, 1 Clamp, 1 Contact, 1 Gasket, 1 Insulator, 1 Washer
Impedance50Ohm
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationClamp
Contact terminationSolder
Center contact platingSilver

Product details

The 31-212: It is a field-assembly kit — the package includes the connector body, braid clamp, cable clamp, centre contact, gasket, insulator, and washer — seven pieces total, so nothing extra to order for a single termination.

This plug fits RG-59, 59B, 62, 140, 210, and Belden 8241, 8263, 8279, 9209 coax cables. The centre contact is solder termination; the shield is clamped down by the braid clamp.

31-212 vs 31-206 — In-Line Plug vs Bulkhead Jack

The 31-206 is the bulkhead-mounted jack counterpart to this plug. Both are BNC, 50 Ohm, 4 GHz, with 500 mating cycles and 0.2 dB insertion loss. The difference is the form factor: the 31-212 is a free-hanging plug (male pin) for in-line cable termination, while the 31-206 is a jack (female socket) that mounts through a panel with a front-side nut and lockwasher. If your assembly needs a panel pass-through, the 31-206 is the mating half on the bulkhead side; the 31-212 stays on the cable end.

Frequently asked questions

What cable types does the 31-212 fit?

The 31-212 fits RG-59, 59B, 62, 140, 210, and Belden 8241, 8263, 8279, 9209 coax cables.

What is the impedance of the 31-212 connector?

The 31-212 is a 50 Ohm BNC plug, rated to 4 GHz maximum frequency.