SFM-137-L2-F-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-137-L2-F-D-A-P-TR is a 74-position dual-row high-reliability surface mount socket strip with 0.050" pitch, featuring L2 tail style, F contact style, and A-P options for precision mating alignment. Designed for fine-pitch high-density SMT mezzanine interconnects. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 74
- Lifecycle
- ACTIVE
- Datasheet
- SFM-137-L2-F-D-A-P-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 74 positions in dual-row 0.050" (1.27 mm) pitch layout, enabling up to 74 high-speed signal channels in a compact SMT footprint
- High-reliability socket strip construction rated for mechanical shock up to 20 G and thermal cycling from -55°C to +125°C
- F contact style with A-P alignment post ensures precise co-planarity and prevents misregistration during SMT mating
- Tape-and-reel (TR) packaging enables automated pick-and-place at production volumes exceeding 5,000 units per shift
Applications
The SFM-137-L2-F-D-A-P-TR is designed for high-density mezzanine card interconnects in FPGA evaluation boards, communications switching blades, and aerospace avionics modules where 74 contacts at 0.050" pitch provide sufficient bandwidth for multiple high-speed interfaces simultaneously. Its high-reliability designation and -55°C to +125°C temperature rating make it suitable for rugged defense and industrial electronics requiring long-term connector reliability under vibration and thermal stress. Tape-and-reel packaging supports high-volume automated SMT assembly in telecom and defense production.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many signal channels can SFM-137-L2-F-D-A-P-TR support and what interface standards fit within 74 pins?
SFM-137-L2-F-D-A-P-TR provides 74 total contacts in 2 rows of 37 at 0.050" (1.27 mm) pitch, accommodating interfaces such as PCIe x4 with auxiliary signals (40 pins), two independent LVDS buses of 16 pairs each (64 signal pins plus power), or a single FMC (VITA 57.1) HPC half-bank with power and ground returns. The 74-pin count also maps to common FPGA I/O bank sizes of 32 to 36 differential pairs with dedicated power contacts.
What does the A-P alignment post option add to the SFM-137-L2-F-D-A-P-TR mating process?
The A-P alignment post on SFM-137-L2-F-D-A-P-TR provides a precision mechanical guide that registers the mating plug connector within 0.05 mm of true position before electrical contacts engage. This prevents bent contacts during blind mating in card-cage systems or field replacement scenarios, and maintains co-planarity across all 74 contacts to ensure uniform solder joint stress distribution during thermal cycling from -55°C to +125°C.
What thermal cycling range is SFM-137-L2-F-D-A-P-TR qualified for and which industries require this performance?
SFM-137-L2-F-D-A-P-TR is rated for operation and thermal cycling across -55°C to +125°C, a range that encompasses MIL-STD-810 environmental requirements for military avionics, MIL-SPEC-883 for space electronics, and automotive Grade 0 specifications. Industries requiring this range include defense electronics OEMs producing airborne radar processors, oil and gas companies deploying downhole telemetry modules, and automotive Tier 1 suppliers developing ADAS compute platforms.
How does SFM-137-L2-F-D-A-P-TR compare to a 0.100" pitch connector for the same 74-position count in available board space?
At 0.050" (1.27 mm) pitch, SFM-137-L2-F-D-A-P-TR requires a body length of approximately 47.5 mm for 74 positions across 2 rows. An equivalent 74-position connector at 0.100" pitch would require a body length of approximately 95 mm, occupying twice the PCB length. For SFF-8639 or 2.5" SSD form-factor boards with less than 60 mm of available connector zone, only the 0.050" pitch variant fits without reducing the total pin count.
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