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
What are the key features of SFM-128-L2-F-D-A-K-TR?
- 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
What is SFM-128-L2-F-D-A-K-TR used for?
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) |
Where can I find the SFM-128-L2-F-D-A-K-TR datasheet?
SFM-128-L2-F-D-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-128-L2-F-D-A-K-TR?
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.
Related Guides
STM32H753VIT6 High-Performance MCU Design Guide
Practical STM32H753VIT6 design guidance for power, clocks, memory, DMA, PCB layout, bring-up, and production recovery.
Aug 3, 2026
STM32H753ZIT6 Selection Guide for High-Performance Embedded Systems
Select the STM32H753ZIT6 by evaluating compute, memory, LQFP144 pinout, power, interfaces, security, and sourcing requirements.
Aug 3, 2026
ICL7660ACPAZ Negative Voltage Charge Pump Design Guide
Design a reliable ICL7660ACPAZ negative rail with capacitor equations, layout rules, startup checks, and practical troubleshooting.
Aug 2, 2026
C0402C103K3RACTU 10 nF MLCC Design Guide
Practical guidance for applying the C0402C103K3RACTU 10 nF, 25 V X7R MLCC in decoupling, filtering, timing, and EMI-control networks.
Aug 2, 2026
Why Buy from FindMyChip
About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
10214-6212PC
3M
Connector
1778573
Phoenix Contact
Connector
5227222-3
TE Connectivity
Connector
S4B-XH-SM4-TB(LF)(SN)
JST (JAPAN SOLDERLESS TERMINALS)
Connector
185226-2
TE Connectivity
Connector
0533980571
Molex
Connector
0360-0-15-01-34-27-10-0
Mill-Max
Connector
7850-0006PR
3M
Connector
AVB 1,5/2/12
BLOCK
Connector
N3764-5002RB
3M
Connector
N3627-6002RB
3M
Connector
N3627-5002RB
3M
Connector
N3440-6002RB
3M
Connector
929715-03-36-I
3M
Connector
929667-02-36-I
3M
Connector
929665-04-36-I
3M
Connector
929665-02-36-I
3M
Connector
929647-04-36-I
3M
Connector
929647-03-36-I
3M
Connector
7834-0006PR
3M
Connector
7826-0006PR
3M
Connector
7820-0006PR
3M
Connector
3440-5002
3M
Connector
3433-5302
3M
Connector