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919-128J-51SX — Amphenol product photo
Amphenol

Amphenol 919-128J-51SX MCX Jack, 50 Ohm, 6 GHz, Bulkhead

MPN919-128J-51SX
Active

Amphenol MCX jack, 50 Ohm, bulkhead front-side nut mount, snap-on coupling, gold body, solder center contact, crimp shield, for RG-174/188/316/LMR-100, DC to 6 GHz, 0.1 dB insertion loss, 500 mating cycles, -65 to 165 °C, includes hardware.

$10.8300Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
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Specifications

919-128J-51SX Technical Specifications
ParameterValue
Mounting typePanel Mount
Connector typeJack, Female Socket
Fastening typeSnap-On
Frequency - max6 GHz
Mounting featureBulkhead - Front Side Nut
Cable groupRG-174, 188, 188A, 316, LMR-100, M17/119-RG174
Operating temperature-65°C~165°C
Body materialBrass
Housing colorGold
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialBeryllium Copper
PackageBulk
Includes5 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Lockwasher, 1 Nut
Impedance50Ohm
Body finishGold
Mating cycles500
Insertion loss0.1dB
Number of ports1
Shield terminationCrimp
Contact terminationSolder
Center contact platingGold

Product details

The gold-plated brass body and beryllium copper center contact with gold plating support 500 mating cycles with stable contact resistance.

This jack accepts RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174 cables — the most common small-diameter coax types for short-run RF interconnects. The center contact is solder-terminated; the shield is crimped using the included ferrule. The kit ships with one connector, one contact, one ferrule, one lockwasher, and one nut — everything needed for a single cable assembly except the cable and solder.

Mounting and RF Performance

Mounts through a panel bulkhead with a front-side nut — the lockwasher prevents loosening under vibration. The PTFE dielectric keeps insertion loss to 0.1 dB across the DC-to-6 GHz band, making it suitable for sensitive receive paths or low-power transmit stages. The snap-on interface is keyed to the MCX standard; it mates with any standard MCX plug.

Frequently asked questions

Where can I buy the 919-128J-51SX?

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

What cables are compatible with the 919-128J-51SX?

It accepts RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174 cables.

Does the 919-128J-51SX come with mounting hardware?

Yes, the kit includes a lockwasher and nut for bulkhead mounting, plus the connector, contact, and ferrule.

What is the impedance of the 919-128J-51SX?

50 Ohm nominal impedance, standard for most RF systems.