SFM-121-T2-STL-D-A-K SAMTEC Connector (Other) In Stock

Name: SFM-121-T2-STL-D-A-K
Brand: SAMTEC
SKU: SFM-121-T2-STL-D-A-K
Availability: InStock

SAMTEC SFM-121-T2-STL-D-A-K is a 42-position dual-row high-reliability surface mount socket strip on 1.27 mm (0.050 inch) pitch, ideal for fine-pitch mezzanine and daughtercard connections in compact high-density PCB designs.

ACTIVEConnectorVerified Jun 2026

Package / Visual Reference

SFM-121-T2-STL-D-A-KOther

Quick Facts

Manufacturer: SAMTEC
Package: Other
Pin Count: 42
Lifecycle: ACTIVE
Datasheet: SFM-121-T2-STL-D-A-K Datasheet PDF
Category: Connector
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of SFM-121-T2-STL-D-A-K?

42-position dual-row surface mount socket strip on 1.27 mm (0.050 inch) pitch for fine-pitch mezzanine interconnects
High-reliability construction supporting frequent mating cycles in rugged aerospace and defense applications
Surface mount (STL) termination for automated reflow soldering compatibility with fine-pitch SMT footprints

What is SFM-121-T2-STL-D-A-K used for?

The SFM-121-T2-STL-D-A-K is used in aerospace avionics, defense electronics, and high-density embedded computing modules that require a reliable 42-pin dual-row socket at 0.050 inch pitch. Its fine-pitch SMT footprint supports high signal density while minimizing board area consumption in space-constrained assemblies.

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)

Where can I find the SFM-121-T2-STL-D-A-K datasheet?

SFM-121-T2-STL-D-A-K Datasheet Download

Official datasheet from SAMTEC

What are equivalent replacements for SFM-121-T2-STL-D-A-K?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

What configuration does the SFM-121-T2-STL-D-A-K offer and what is its contact pitch?

The SFM-121-T2-STL-D-A-K provides 42 positions in a dual-row (2 rows of 21) socket strip on a 1.27 mm (0.050 inch) pitch. This fine pitch enables high-density PCB routing and is mating-compatible with SAMTEC TSM and TFM series headers at the same 0.050 inch spacing.

How does the SFM-121-T2-STL-D-A-K differ from SFM-122-L2-FM-D-A-K in terms of pin count and target use case?

The SFM-121 provides 42 positions versus 44 positions on the SFM-122, both at 1.27 mm (0.050 inch) pitch in a dual-row SMT socket format. The 2-pin difference makes SFM-121 suitable for designs requiring 42 signals where the mating header footprint dictates 21 pins per row rather than 22.

For a rugged avionics module, how many mating cycles can the SFM-121-T2-STL-D-A-K typically support compared to standard commercial sockets?

SAMTEC SFM high-reliability socket strips are designed for a minimum of 100 mating cycles, well above the 30 to 50 cycle rating of typical low-cost commercial SMT sockets, making them appropriate for field-maintainable avionics and defense modules where boards are swapped regularly during service intervals.

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Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

Response within 24 hours · Worldwide shipping

“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”

Marco Rossi

CTO, AutoDrive Systems, Italy

SFM-121-T2-STL-D-A-K SAMTEC Connector (Other) In Stock

What are the key features of SFM-121-T2-STL-D-A-K?

What is SFM-121-T2-STL-D-A-K used for?

Compliance & Regulatory

Where can I find the SFM-121-T2-STL-D-A-K datasheet?

What are equivalent replacements for SFM-121-T2-STL-D-A-K?

Frequently Asked Questions

What configuration does the SFM-121-T2-STL-D-A-K offer and what is its contact pitch?

How does the SFM-121-T2-STL-D-A-K differ from SFM-122-L2-FM-D-A-K in terms of pin count and target use case?

For a rugged avionics module, how many mating cycles can the SFM-121-T2-STL-D-A-K typically support compared to standard commercial sockets?

Related Guides

STM32H753VIT6 High-Performance MCU Design Guide

STM32H753ZIT6 Selection Guide for High-Performance Embedded Systems

ICL7660ACPAZ Negative Voltage Charge Pump Design Guide

C0402C103K3RACTU 10 nF MLCC Design Guide

Why Buy from FindMyChip

About SAMTEC

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