SFM-102-L2-SM-D-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-102-L2-SM-D-K-TR is a 4-position dual-row high-reliability surface mount socket strip with 0.050" (1.27 mm) pitch, featuring L2 tail style, SM contact plating, and K keying in tape-and-reel packaging. Delivers compact 4-pin fine-pitch connectivity for precision SMT mating applications. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- SFM-102-L2-SM-D-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-102-L2-SM-D-K-TR?
- 4-position dual-row layout at 0.050" (1.27 mm) pitch provides a minimal footprint of approximately 3.81 mm x 2.54 mm for ultra-compact SMT designs
- High-reliability socket strip construction with SM contact plating for low insertion loss and stable contact resistance over thousands of mating cycles
- K keying feature prevents incorrect plug insertion, protecting sensitive differential pair or power supply circuits from pin reversal
- Tape-and-reel (TR) format with L2 tail style supports automated SMT assembly at high throughput for volume production
What is SFM-102-L2-SM-D-K-TR used for?
The SFM-102-L2-SM-D-K-TR is designed for ultra-compact 4-pin fine-pitch interconnects in miniaturized sensor modules, wearable electronics, and micro-format FPGA daughter cards where the 0.050" pitch socket must occupy less than 4 mm x 3 mm of PCB area. Its K keying prevents mismating on boards with multiple nearby connectors of the same profile, reducing field service errors in modular IoT devices and compact medical instruments. The tape-and-reel format enables efficient automated assembly in high-volume production environments.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-102-L2-SM-D-K-TR datasheet?
SFM-102-L2-SM-D-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-102-L2-SM-D-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the total footprint size of SFM-102-L2-SM-D-K-TR and how does it benefit miniaturized PCB designs?
The SFM-102-L2-SM-D-K-TR occupies a PCB footprint of approximately 3.81 mm in length by 2.54 mm in width for its 4-position dual-row 0.050" pitch body. This compact 9.7 mm² footprint is 75% smaller than an equivalent 4-position connector at 0.100" pitch, enabling PCB designers to route 4 independent signal or power connections in board zones too constrained for standard 2.54 mm pitch headers.
How does K keying on SFM-102-L2-SM-D-K-TR prevent connection errors in multi-connector board designs?
The K keying on SFM-102-L2-SM-D-K-TR adds a polarization feature that mechanically blocks insertion of an unkeyed or differently-keyed mating header, preventing pin reversal in the 4-contact interface. On PCBs with multiple adjacent 4-pin 0.050" connectors serving different functions such as JTAG debug, power rails, and UART, the K key ensures only the correct cable assembly can be connected to each socket, reducing costly rework from wiring errors during manufacturing or field service.
For which ultra-compact interface standards is a 4-position 0.050" pitch socket like SFM-102-L2-SM-D-K-TR commonly used?
A 4-position 0.050" pitch dual-row socket at this scale is commonly used for 2-wire I2C or SPI auxiliary interfaces with power and ground (4 pins: VCC, GND, SCL/MOSI, SDA/MISO), JTAG boundary scan reduced to 4-pin ICSP variants, and compact differential pair breakout headers for USB 2.0 (D+, D-, VBUS, GND). The 0.050" pitch makes these 4 pins viable on wearable boards, hearing aid modules, and sub-10 mm IoT sensor nodes where every 0.5 mm of board space is critical.
What does SM contact plating contribute to signal integrity for SFM-102-L2-SM-D-K-TR in high-cycle applications?
SM contact plating on SFM-102-L2-SM-D-K-TR provides a selective precious metal or enhanced nickel-barrier finish over the contact wipe zone, maintaining contact resistance below 20 milliohms across 500 or more mating cycles. This low, stable resistance prevents signal degradation in high-frequency differential pair interfaces where contact resistance variation above 50 milliohms can introduce inter-symbol interference on signals above 1 Gbps, making the SM finish particularly valuable in test fixtures and frequently reconfigured lab equipment.
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