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2-221128-3 — TE Connectivity AMP Connectors product photo
TE Connectivity AMP Connectors

TE Connectivity 2-221128-3 BNC Plug, 50 Ohm, 4 GHz

MPN2-221128-3
Obsolete

TE Connectivity BNC plug, male pin, 50 Ohms, 4 GHz, crimp termination for RG-179/187, nickel-plated zinc body, gold center contact, 500 mating cycles, bulk.

$3.0828Ref. price · indicative, final on quote
2-221128-3 datasheet
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Specifications

2-221128-3 Technical Specifications
ParameterValue
Mounting typeFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupRG-179, 187
Operating temperature-55°C ~ 85°C
Body materialZinc
Housing colorSilver
Dielectric materialPolyethylene (PE)
Center contact materialBrass
PackageBulk
Impedance50 Ohms
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationCrimp
Contact terminationCrimp
Center contact platingGold

Product details

BNC Plug, 50 Ohm, 4 GHz — for RG-179/187 Coax

It terminates RG-179 and RG-187 coaxial cables with a crimp center contact and crimp shield termination — no soldering needed for the center pin, just the right crimp die.

No direct replacement is listed on the record. If you need a current-production alternative, a parametric search for a 50 Ohm BNC plug for RG-179/187 with similar frequency range will turn up active options from TE or other manufacturers.

The crimp center contact and shield termination require a crimp tool with the correct die set for the cable diameter.

RF Performance and Mating

With a 4 GHz maximum frequency and 0.2 dB insertion loss, this plug is suitable for RF applications up to the low microwave range — think test equipment, telecom infrastructure, and video distribution. The 500 V rating gives headroom for signals with significant peak voltage. The bayonet lock mates with standard BNC jacks (female) on bulkheads, PCB mounts, or cable receptacles. Gold plating on the center contact ensures low and stable contact resistance over the 500-cycle life.

Frequently asked questions

What cable is compatible with 2-221128-3?

The 2-221128-3 is designed for RG-179 and RG-187 coaxial cables. These are small-diameter cables, typically used in RF and video applications. The connector uses a crimp termination for both the center contact and the shield.

What is the impedance and frequency range of 2-221128-3?

The 2-221128-3 is a 50 Ohm BNC plug rated to 4 GHz maximum frequency. Insertion loss is 0.2 dB. It is suitable for RF signal paths in test, telecom, and video systems.