SFM-121-02-FM-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-121-02-FM-D-A-P-TR is a 42-position dual-row surface-mount socket strip with 0.050" (1.27 mm) pitch, featuring polarization, gold-plated contacts, and tape-and-reel packaging for reliable high-density board-to-board mezzanine connections.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- SFM-121-02-FM-D-A-P-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-121-02-FM-D-A-P-TR?
- 42 positions in a dual-row layout providing 21 contacts per row for medium-density interfaces
- 0.050" (1.27 mm) pitch for compact, high-density SMT board-to-board connectivity
- Polarized (A) design preventing incorrect mating orientation across all 42 contacts
- Gold-plated (P) contacts ensuring low contact resistance and corrosion resistance over extended service life
- Tape-and-reel (TR) packaging enabling high-speed automated SMT assembly
What is SFM-121-02-FM-D-A-P-TR used for?
The SFM-121-02-FM-D-A-P-TR is ideal for medium-density mezzanine and board-to-board interconnect in industrial automation, FPGA expansion boards, and communications equipment. Its 42-position dual-row configuration with polarization and gold-plated contacts ensures reliable assembly and stable electrical performance across many mating cycles. The tape-and-reel format simplifies high-volume SMT production with automated pick-and-place machines.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-121-02-FM-D-A-P-TR datasheet?
SFM-121-02-FM-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-121-02-FM-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the significance of the A (polarized) and P (gold-plated) suffixes in the SFM-121-02-FM-D-A-P-TR part number?
The A suffix indicates the connector is mechanically polarized, restricting mating to a single correct orientation across all 42 positions to prevent pin misalignment. The P suffix denotes gold plating on the contact surfaces, providing contact resistance below 20 mΩ and corrosion resistance for long-term reliable operation in humid or thermally cycled environments.
How many contacts does the SFM-121-02-FM-D-A-P-TR provide and at what pitch are they arranged?
The SFM-121-02-FM-D-A-P-TR provides 42 contacts arranged in 2 rows of 21, with a 0.050" (1.27 mm) pitch between adjacent contacts. This layout fits a PCB footprint approximately 26 mm long and is suitable for routing up to 42 signal or power lines between stacked boards.
What SMT assembly temperature should be used when soldering the SFM-121-02-FM-D-A-P-TR to a PCB?
The SFM-121-02-FM-D-A-P-TR supports standard lead-free reflow soldering with a peak temperature of up to 260°C in accordance with JEDEC J-STD-020. Its 42 SMT pads are designed with coplanarity within 0.1 mm to ensure uniform solder paste contact during reflow and prevent cold joints.
When is the SFM-121-02-FM-D-A-P-TR a better choice than a non-polarized 0.050" connector of similar pin count?
The polarized (A) variant is preferable in any system where accidental reversed insertion of a 42-pin connector could cause immediate damage, such as when mixed voltage levels of 3.3 V and 1.8 V are present on adjacent pins. The polarization key physically blocks mismatched mating, providing an assembly error-proofing feature that non-polarized alternatives lack at the same 0.050" pitch.
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