SFM-137-T2-S-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-137-T2-S-D-A-K is a 74-position dual-row high-reliability socket strip with 0.050" pitch for surface-mount PCB connections. Gold-plated contacts deliver 1 A per pin with operating temperatures from -55°C to +125°C and a solder-in T2 termination. Available from stock worldwide with fast shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 74
- Lifecycle
- ACTIVE
- Datasheet
- SFM-137-T2-S-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 74-position dual-row configuration at 0.050" (1.27 mm) pitch with T2 solder-in termination for secure SMT board attachment
- Gold-plated contacts rated at 1 A per pin ensuring stable low-resistance mating across extended thermal cycling from -55°C to +125°C
- High-reliability socket strip design compatible with SAMTEC SFM series mating headers for controlled-impedance board-to-board stacking applications
Applications
The SFM-137-T2-S-D-A-K provides high-density board-to-board interconnections in compact embedded systems, mezzanine modules, and telecom line cards where 74 signals must be transferred between stacked PCBs in a small footprint. The T2 termination style offers additional mechanical retention over standard solder-in options, making it suitable for vibration-prone environments such as industrial machinery and avionics systems. Its 0.050" pitch dual-row layout is compatible with the broader SAMTEC SFM ecosystem of mating connectors and accessories.
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
What termination style does the SFM-137-T2-S-D-A-K use, and how does it improve mechanical retention compared to a standard solder pin?
The SFM-137-T2-S-D-A-K uses a T2 solder-in termination, which features a larger solder tail cross-section than standard round pins, providing greater solder fillet area and pull-out strength. This improved mechanical retention is important in vibration-prone applications where connector separation could cause intermittent faults across the 74 contacts. The T2 style is particularly valued in avionics and industrial automation assemblies subject to continuous vibration above 2 g.
How does the 74-position SFM-137-T2-S-D-A-K compare to the 78-position SFM-139-02-H-D-A for board-to-board stacking?
Both parts share the same 0.050" (1.27 mm) pitch dual-row format and 1 A per-pin gold contact rating, but the SFM-137-T2-S-D-A-K offers 74 positions versus 78, making its footprint slightly shorter. The T2 termination on SFM-137 also provides better vibration resistance than the standard H-D termination style. Designers with a 74-signal interface or tight board length constraints should choose SFM-137, while those needing 4 additional signals should use SFM-139.
In a mezzanine stack cycling between -40°C and +85°C, does the SFM-137-T2-S-D-A-K maintain reliable contact resistance?
Yes. The SFM-137-T2-S-D-A-K is rated from -55°C to +125°C, so the -40°C to +85°C industrial cycling range is well within specification. The gold-plated contacts maintain contact resistance below 20 milliohms across this range because gold does not oxidize during thermal excursions, unlike tin contacts that form oxide films at elevated temperatures. This stability is critical in 74-pin high-speed signal buses where impedance variation causes bit errors.
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