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Amphenol FA1-NKSJ-C01-6 — RF / Coaxial Connectors

Amphenol FA1-NKSJ-C01-6 SMB Fakra Jack, 50 Ohm, 4 GHz

MPNFA1-NKSJ-C01-6
Active

Amphenol SMB/Fakra jack, female socket, 50 Ohm, 4 GHz, latch lock, crimp termination, RG-174/188/316/LMR-100, 5-piece kit, nickel body, gold centre contact.

$3.0600Ref. price · indicative, final on quote
Amphenol FA1-NKSJ-C01-6 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for stock & sourcing questions
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent supplier — new & surplus connector stock· Listing updated Jul 2026

Specifications

FA1-NKSJ-C01-6 key specifications
ParameterValue
MountingFree Hanging (In-Line)
Connector typeJack, Female Socket
Fastening typeLatch Lock
Frequency - max4 GHz
Cable groupRG-174, 188, 188A, 316, LMR-100, M17/119-RG174
Operating temperature-40°C~115°C
Body materialBrass
Housing colorCurry
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialBeryllium Copper
PackageBulk
FeaturesCode K

All specifications

FA1-NKSJ-C01-6 additional specifications
ParameterValue
Includes5 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Housing, 1 Locking Clip
Impedance50Ohm
Body finishNickel
Mating cycles100
Insertion loss0.3dB
Number of ports1
Shield terminationCrimp
Contact terminationCrimp
Center contact platingGold

Product details

SMB/Fakra Jack for RG-174 and LMR-100 Coax — 50 Ohm, 4 GHz

The Amphenol FA1-NKSJ-C01-6 is a Code K SMB/Fakra jack, female socket, designed for in-line (free-hanging) termination on small-diameter coaxial cables. It is a 5-piece kit that includes the connector body, centre contact, ferrule, housing, and locking clip — one order code covers the full cable termination hardware.

Code K Keying and Latch Lock — Vibration-Resistant Mating

The Fakra interface uses a colour-coded mechanical keying system; this connector carries Code K, identified by a curry-coloured housing.

This jack accepts RG-174, RG-188A, RG-316, LMR-100, and M17/119-RG174 cables — common small-diameter coax types used in low-power RF and signal applications. Note that LMR-.

RF Performance and Dielectric

The PTFE dielectric keeps insertion loss to 0.3 dB at 4 GHz, with a stable dielectric constant over the -40°C to 115°C operating range. For signal paths running up to 4 GHz, this jack delivers a clean launch; above that frequency the VSWR rises and the interface is not specified.

Frequently asked questions

What cables are compatible with FA1-NKSJ-C01-6?

The FA1-NKSJ-C01-6 accepts RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174 coaxial cables. LMR-195 is not listed and is too large for the cable entry.

What is the difference between latch lock and snap-on coaxial connectors?

Latch lock (used on this Fakra jack) provides a positive mechanical retention that resists vibration and accidental disconnection, unlike the push-on snap coupling of standard SMB connectors. The latch must be manually released to unmate, which adds security in automotive and industrial environments.

Can FA1-NKSJ-C01-6 be used with LMR-195 cable?

No, LMR-195 is not in the listed cable group (RG-174, 188, 188A, 316, LMR-100, M17/119-RG174). The cable entry and ferrule are sized for these smaller-diameter cables.