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TE Connectivity AMP Connectors 504021-1 — RF / Coaxial Connectors

TE Connectivity 504021-1 Simplex ST Coupler

MPN504021-1
Active

TE Connectivity 504021-1 ST-to-ST simplex fiber coupler, panel mount bulkhead, Singlemode/Multimode, zinc housing with dust cap, UL94 V-0.

$7.2800Ref. price · indicative, final on quote
TE Connectivity AMP Connectors 504021-1 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 China distributor & sourcing agent· Listing updated Aug 2026

Specifications

504021-1 specifications
ParameterValue
TypeCoupler
MountingPanel Mount, Bulkhead
ColorSilver
Ferrule materialPhosphor Bronze
Housing materialZinc
Material flammability ratingUL94 V-0
ModeSinglemode/Multimode
PackageBulk
FeaturesDust Cap
Simplex (Duplex)Simplex
Convert to (Adapter end)ST Receptacle
Convert from (Adapter end)ST Receptacle

Product details

ST-to-ST simplex coupler for panel-mount fiber patching

The TE Connectivity 504021-1 is a simplex ST-to-ST fiber optic coupler — a straight-through adapter that joins two ST-terminated cables. It accepts both Singlemode and Multimode fiber, making it a general-purpose bulkhead pass-through for patch panels or equipment enclosures.

Panel-mount installation and simplex format

The simplex format means it passes a single fiber, so a duplex link requires two units side by side. The phosphor bronze ferrule sleeve centres the ST ferrules for low insertion loss across repeated matings.

Frequently asked questions

Where can I buy the 504021-1 available via RFQ confirmation?

The 504021-1 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock-holding claim is made on this listing.

Is 504021-1 a simplex or duplex ST coupler?

It is a simplex coupler — it passes a single fiber. For duplex links, two units are needed side by side.

What mounting type does the 504021-1 use?

Panel mount, bulkhead — the coupler passes through a panel cutout and is secured with a nut on the opposite side.

Does the 504021-1 include a dust cap?

Yes, a dust cap is included to protect the alignment sleeve when the port is not in use.

Is the 504021-1 compatible with both singlemode and multimode fiber?

Yes, it is listed for both Singlemode and Multimode operation, so it works with either fiber type in the same adapter.