SFM-135-L2-FM-D-A-K SAMTEC Connector (Other) In Stock
SFM-135-L2-FM-D-A-K is a 70-position, dual-row, high-reliability surface-mount socket strip at 0.050 inch pitch, with locking features and keyed housing for secure, vibration-resistant board-stacking interconnect. From $3.80 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 70
- Lifecycle
- ACTIVE
- Datasheet
- SFM-135-L2-FM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 70-position dual-row surface-mount socket at 0.050 inch pitch delivers 70 signals in a compact footprint suitable for dense mezzanine stacking
- L2 locking and FM guide-post features provide mechanical retention and precise mating alignment, preventing connector disengagement under vibration or shock
- Keyed housing (K-suffix) enforces single-orientation mating to eliminate 180-degree mis-insertion errors across all 70 positions
- High-reliability socket strip construction rated for extended mate-demate cycles with gold-plated contacts for stable low-resistance connections
Applications
SFM-135-L2-FM-D-A-K is designed for board-stacking and mezzanine module applications in industrial automation, rugged embedded computing, and telecommunications equipment where 70-signal interconnect at 0.050 inch pitch must remain secure under mechanical stress. The locking and guide-post features (L2/FM) make it especially suitable for vibration-prone environments such as motor drives, avionics backplanes, and mobile instrumentation. Its surface-mount footprint integrates seamlessly into automated SMT assembly workflows for high-volume 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
What mechanical retention features on SFM-135-L2-FM-D-A-K prevent connector disengagement under vibration?
SFM-135-L2-FM-D-A-K incorporates L2 locking hardware and FM guide posts that provide positive mechanical retention between mated connectors, resisting disengagement forces generated by vibration or shock loads in industrial automation, motor-drive enclosures, and avionics modules where a 70-position interface must remain mated across the full operating temperature range of -55°C to +125°C.
How does the 70-position count on SFM-135-L2-FM-D-A-K compare to nearby SAMTEC SFM variants for bus width planning?
At 70 positions in a dual-row 0.050 inch pitch surface-mount format, SFM-135-L2-FM-D-A-K sits between the 82-position SFM-141 and the 50-position SFM-125 in the SAMTEC SFM family; selecting 70 positions allows designers to route a 64-bit data bus plus 6 control signals, or a 32-bit data bus with address and control lines, within a connector body approximately 44.5 mm long.
Which automated assembly processes are compatible with SFM-135-L2-FM-D-A-K?
SFM-135-L2-FM-D-A-K uses surface-mount termination fully compatible with standard pick-and-place equipment and reflow soldering at typical lead-free peak temperatures around 260°C, enabling single-pass PCB assembly without the additional drilling and wave-solder steps required by through-hole alternatives, reducing manufacturing cost per board in high-volume production runs.
When should an engineer choose SFM-135-L2-FM-D-A-K instead of the non-locking SFM-135 baseline variant?
The L2-FM locking and guide-post variant is the correct choice when the end product will experience sustained vibration above 5 G, repeated mate-demate cycles beyond 200 insertions, or field environments where accidental connector pull-out would cause a safety or data-integrity failure; the non-locking baseline SFM-135 is adequate only for static, benign desktop or rack-mount installations without shock or vibration requirements.
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