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Amphenol 31-221-RFX — RF Cable Assemblies

31-221-RFX BNC Jack, 50 Ohm, Panel Mount, 4 GHz, Active

MPN31-221-RFX
Active

Amphenol RF BNC jack, 31-221-RFX, 50 Ohm, panel mount bulkhead, bayonet lock, solder cup, gold center contact, 4 GHz, 500 cycles, includes lockwasher, nut, solder tag.

$3.3800Ref. price · indicative, final on quote
Amphenol 31-221-RFX datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for stock & sourcing questions
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent supplier — new & surplus connector stock· Listing updated Aug 2026

Specifications

31-221-RFX key specifications
ParameterValue
MountingPanel Mount
Connector typeJack, Female Socket
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Mounting featureBulkhead - Rear Side Nut
Body materialZinc Die Cast
Housing colorSilver
Dielectric materialPolyoxymethylene (POM) Acetal
Center contact materialPhosphor Bronze
PackageBulk
FeaturesExtended Insulation

All specifications

31-221-RFX additional specifications
ParameterValue
Includes4 pcs - 1 Connector, 1 Lockwasher, 1 Nut, 1 Solder Tag
Impedance50Ohm
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationSolder Tag
Contact terminationSolder Cup
Center contact platingGold

Product details

Panel-Mount BNC Jack with Extended Insulation

The 31-221-RFX: It ships as a complete kit: one connector, one lockwasher, one hex nut, and one solder tag — no separate hardware order needed. The extended insulation feature provides additional creepage distance between the centre contact and the shell, useful when the cable jacket is stripped back further than usual or when the connector sits near a grounded chassis edge.

The body is zinc die cast with a nickel finish, giving a durable silver appearance that matches standard BNC panel hardware. Termination is solder cup — the centre contact accepts a tinned or bare wire end; the shield connects via the included solder tag, which is soldered to the cable braid and clamped under the nut. The bayonet lock provides quick quarter-turn mating with any standard BNC plug.

Listed as Active.

Frequently asked questions

Where can I buy 31-221-RFX in bulk?

Submit a request for current pricing and availability — quantities are confirmed at quote time.

What is the impedance of 31-221-RFX?

50 Ohm nominal, standard for BNC interfaces used in RF test and telecom equipment.

What is the difference between 31-221-RFX and 31-221?

The RFX suffix indicates the extended insulation feature — additional dielectric material between centre contact and shell for higher creepage. The base 31-221 is the standard version without this feature.