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31-203-RFX — Amphenol product photo
Amphenol

Amphenol RF 31-203-RFX BNC Jack, 50 Ohm, 4 GHz, Panel Mount

MPN31-203-RFX
Active

Amphenol RF BNC jack, female socket, 50 Ohm, panel mount, flange, solder cup, gold center contact, 500 mating cycles, 4 GHz, 500 V, extended insulation, bulk.

$6.6700Ref. price · indicative, final on quote
31-203-RFX datasheet
StockIn Stock (19)
Lead timeIn Stock wk
MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
  • Factory packaging where availableSealed reels, trays and bags; cut quantities always stated on the quote.
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Specifications

31-203-RFX Technical Specifications
ParameterValue
Mounting typePanel Mount
Connector typeJack, Female Socket
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Mounting featureFlange
Operating temperature-65°C~165°C
Body materialBrass
Housing colorSilver
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialPhosphor Bronze
PackageBulk
FeaturesExtended Insulation
Impedance50Ohm
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationSolder
Contact terminationSolder Cup
Center contact platingGold

Product details

The 31-203-RFX: It mounts to a panel via a flange, using the bayonet lock for quick connect and disconnect. Extended insulation on this variant adds creepage distance between the center conductor and the shell, supporting the 500 V rating.

RF Performance and Bandwidth

For test equipment, instrumentation, or RF distribution panels, the 4 GHz ceiling covers most sub-6 GHz applications including cellular, Wi-Fi, and broadcast gear.

Mechanical Endurance and Field Life

Comparing the 31-203-RFX with the 31-221-RFX

The 31-221-RFX is the closest functional sibling — also a BNC jack, 50 Ohm, 4 GHz, 500 mating cycles, and gold-plated center contact. The difference is in the body material and mounting: the 31-203-RFX uses a brass body with a flange mount, while the 31-221-RFX uses a zinc die-cast body with a bulkhead mount (rear-side nut) and includes a lockwasher, nut, and solder tag in the package. For a panel that accepts a flange, the 31-203-RFX is the direct choice; for a bulkhead hole with a nut, the 31-221-RFX fits.

Frequently asked questions

Where can I buy the Amphenol RF 31-203-RFX?

The 31-203-RFX is available to order through independent distribution. Submit an RFQ for current pricing and lead time — availability is confirmed at quote time.

Does 31-203-RFX have extended insulation?

Yes, the 31-203-RFX includes extended insulation, which increases creepage distance between the center conductor and the shell for the 500 V rating.