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TE Connectivity AMP Connectors 221128-1 — RF / Coaxial Connectors

TE Connectivity 221128-1 BNC Plug, 50 Ohm, 4 GHz, Obsolete

MPN221128-1
Obsolete

TE Connectivity BNC plug, 221128-1, 50 Ohm, 4 GHz, crimp termination for RG-58 cable, gold center contact, bayonet lock, 500 mating cycles.

$11.3900Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

221128-1 key specifications
ParameterValue
MountingFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupRG-58, 58A, 58B, 58C
Operating temperature-55°C ~ 85°C
Body materialZinc
Housing colorSilver
Dielectric materialPolyethylene (PE)
Center contact materialBrass
PackageBulk

All specifications

221128-1 additional specifications
ParameterValue
Impedance50 Ohms
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationCrimp
Contact terminationCrimp
Center contact platingGold

Product details

BNC Plug for RG-58 — 50 Ohm, 4 GHz Signal Path

The center contact is brass with gold plating, the zinc body gets a nickel finish, and the dielectric is polyethylene. A bayonet lock provides quick, secure mating with a standard BNC jack. Rated for 500 mating cycles and 500 V, this connector suits test equipment, instrumentation, and low-power RF interconnects where a field-terminable, 50 Ohm BNC is needed.

This plug is built for the RG-58 cable group (RG-58, 58A, 58B, 58C) — a common 50 Ohm coax. Both the center pin and the outer braid are crimp-terminated, which gives a consistent, gas-tight connection without solder. The shield termination is also crimp, so a single hex crimp tool for the ferrule handles the braid. Free-hanging (in-line) mounting means it mates to a bulkhead jack or another in-line connector without panel hardware.

Frequently asked questions

What is the impedance of the 221128-1?

The 221128-1 is a 50 Ohm BNC plug, rated to 4 GHz maximum frequency.