SFM-128-02-S-D-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-128-02-S-D-A-K-TR is a 56-position dual-row high-reliability surface mount socket strip at 1.27 mm (0.050 inch) pitch, with K (kinked lead) option and tape-and-reel packaging for precise SMT coplanarity. From $2.10 in stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Datasheet
- SFM-128-02-S-D-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 56-position dual-row 1.27 mm pitch SMT socket with K (kinked lead) option ensuring controlled lead height for consistent coplanarity during reflow soldering
- High-reliability SFM series with gold-plated contacts and 30+ mating cycle life, suitable for field-replaceable mezzanine modules
- Tape and reel (TR) format supports automated pick-and-place assembly at high volumes with accurate placement repeatability
Applications
The SFM-128-02-S-D-A-K-TR is suited for high-density board-to-board connections in embedded computing modules, wireless communication daughterboards, and test fixture interfaces requiring 56 reliable contacts at 1.27 mm pitch. The kinked lead option enables controlled standoff height between the connector body and PCB surface, improving solder joint reliability in high-vibration environments. Its tape-and-reel format integrates seamlessly into automated SMT production lines.
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 does the K option in SFM-128-02-S-D-A-K-TR mean for PCB assembly?
The K suffix indicates kinked (bent) leads, which create a controlled standoff between the connector body and the PCB surface during soldering. This standoff, typically 0.1–0.2 mm, allows flux residue to outgas during reflow at 260°C and ensures more uniform solder fillet formation across all 56 pins, reducing the risk of bridging or cold joints in fine-pitch SMT assemblies.
How many signal contacts per row does SFM-128-02-S-D-A-K-TR provide and what is the typical contact current rating?
The SFM-128-02-S-D-A-K-TR has 56 total positions arranged in 2 rows of 28 contacts each at 1.27 mm (0.050 inch) pitch. SAMTEC SFM series contacts are typically rated at 1 A per contact, allowing the 56-position connector to carry up to 56 A total if all pins are used for power distribution, or mixed signal and power bus configurations.
In what scenario would SFM-128-02-S-D-A-K-TR be preferred over a through-hole 56-pin DIP socket for a mezzanine application?
For mezzanine board-to-board stacking on double-sided PCBs, the SFM-128-02-S-D-A-K-TR at 1.27 mm pitch uses approximately 36 mm × 3 mm of board area for 56 positions, compared to a through-hole DIP socket requiring drilled holes and a minimum keep-out zone of roughly 70 mm × 10 mm. The SMT SFM connector enables component placement on the opposite board side and achieves lower mated stack heights under 10 mm.
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