SFM-128-L2-F-D-A-K-TR SAMTEC Connector (Other) In Stock
SFM-128-L2-F-D-A-K-TR is a 56-position dual-row high-reliability socket strip from SAMTEC with 0.050 inch (1.27 mm) pitch in a surface-mount package with locking (K) option for secure mating, available in tape-and-reel for automated assembly. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Datasheet
- SFM-128-L2-F-D-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 56 contacts in dual-row 0.050 inch pitch for dense mezzanine and daughter-card interconnect
- Locking (K suffix) retention mechanism preventing accidental unmating in high-vibration environments
- Tape-and-reel (TR) packaging enabling high-volume automated pick-and-place SMT assembly
- Gold-plated contacts with contact resistance below 20 milliohm for reliable low-noise signal transmission
- Surface-mount termination compatible with standard reflow profiles up to 260°C
Applications
SFM-128-L2-F-D-A-K-TR is used in ruggedized mezzanine card assemblies for military electronics, industrial automation, and test equipment where the locking feature prevents accidental disconnection under shock and vibration. The 56-position 0.050 inch pitch allows dense signal interfaces on compact PCBs in portable instruments and data acquisition hardware. Tape-and-reel packaging supports cost-effective volume manufacturing on automated SMT 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 suffix on SFM-128-L2-F-D-A-K-TR mean, and when is it required over a standard unlocked version?
The K suffix indicates a locking contact retention feature that mechanically secures the mated connector pair against accidental separation. This is required in applications subject to vibration above 5 g or shock loads, such as military electronics, avionics, and mobile industrial equipment where a 56-position interface must remain connected under mechanical stress.
How many signal contacts does SFM-128-L2-F-D-A-K-TR provide, and what is the per-contact current rating?
SFM-128-L2-F-D-A-K-TR provides 56 contacts arranged in 2 rows of 28 pins on a 0.050 inch (1.27 mm) pitch. Each contact is rated at 1 A continuous current with contact resistance below 20 milliohm and operating voltage up to 125 V AC/DC, suitable for 3.3 V and 5 V logic bus connections.
For a ruggedized data acquisition module, how does SFM-128-L2-F-D-A-K-TR compare to a 0.100 inch pitch 56-position alternative?
SFM-128-L2-F-D-A-K-TR at 0.050 inch pitch has a connector footprint approximately half the length of a 0.100 inch pitch equivalent, occupying roughly 36 mm versus 72 mm along the mating edge. Combined with the locking K feature, it provides the same 56-channel capacity in half the space, critical for compact rugged modules.
Does SFM-128-L2-F-D-A-K-TR support automated assembly, and what reflow temperature can it withstand?
Yes, the TR designation confirms tape-and-reel format for automated pick-and-place assembly. SFM-128-L2-F-D-A-K-TR withstands peak reflow temperatures of 260°C per JEDEC J-STD-020, and the surface-mount pads meet IPC-7351 land pattern standards for Class 2 solder joint reliability in industrial and commercial applications.
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