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Amphenol 3121 Series

4 variants · Amphenol

About the Amphenol 3121 Series

The Amphenol 3121 Series series groups 4 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. Every variant in the range shares a common body finish of Nickel, body material of Brass and features of -. Variants differ by center contact material, center contact plating and dielectric material, so you can match the exact center contact material your application requires using the selection guide below. All listed Amphenol 3121 Series part numbers are active and orderable.

Select a variant by

Center contact material
Beryllium Copper · Brass · Phosphor Bronze
Center contact plating
Gold · Silver
Dielectric material
Polyoxymethylene (POM) Acetal · Polytetrafluoroethylene (PTFE)
Fastening type
Bayonet Lock · Bayonet Lock, Bayonet Lock
Includes
- · 6 pcs - 1 Connector, 1 Braid Clamp, 1 Clamp, 1 Contact, 1 Gasket, 1 Washer
Insertion loss
- · 0.2dB
Operating temperature
-65°C~165°C · -40°C~85°C
Adapter type
Jack to Jack · Plug to Plug

Shared specifications

Body finish
Nickel
Body material
Brass
Features
-
Frequency - max
4 GHz
Impedance
50Ohm
Ingress protection
-
Mating cycles
500
Mounting feature
-
Mounting type
Free Hanging (In-Line)
Package
Bulk

Variant comparison

Parameter31-219-RFX31-212-RFX31-218-RFX31-219
Center contact materialPhosphor BronzeBrassBrassBeryllium Copper
Center contact platingGoldGoldGoldSilver
Dielectric materialPolytetrafluoroethylene (PTFE)Polytetrafluoroethylene (PTFE)Polyoxymethylene (POM) AcetalPolytetrafluoroethylene (PTFE)
Fastening typeBayonet Lock, Bayonet LockBayonet LockBayonet Lock, Bayonet LockBayonet Lock, Bayonet Lock
Includes-6 pcs - 1 Connector, 1 Braid Clamp, 1 Clamp, 1 Contact, 1 Gasket, 1 Washer--
Insertion loss-0.2dB--
Operating temperature-65°C~165°C-65°C~165°C-40°C~85°C-65°C~165°C
Adapter typeJack to JackPlug to PlugJack to Jack

Request a quote on any Amphenol 3121 Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.

Frequently asked questions

How do the Amphenol 3121 Series variants differ?
Amphenol 3121 Series part numbers differ by center contact material, center contact plating, dielectric material and fastening type. Use the selection guide above to pick by center contact material.
How many Amphenol 3121 Series part numbers are listed?
4 Amphenol 3121 Series part numbers are listed, each with specifications and a datasheet where available.
How do I get pricing and lead time for Amphenol 3121 Series?
Request a quote (RFQ) for any Amphenol 3121 Series part number and we confirm price, availability and lead time per line — including end-of-life and hard-to-find variants.

All variants