SFM-102-L2-FM-D-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-102-L2-FM-D-A-K-TR is a 4-position, dual-row, 0.050 inch pitch high-reliability surface-mount socket strip with 8 total contacts, a floating-mount (FM) design, and lock retention, supplied in tape-and-reel. Supports misalignment compensation in board-to-board stacking applications. Available with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- SFM-102-L2-FM-D-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Floating-mount (FM) design allows ±0.3 mm lateral misalignment compensation between two PCBs, reducing stress on solder joints during mated operation and thermal cycling
- 8-contact (4 positions, dual-row) 0.050 inch pitch high-reliability socket with gold-plated contacts rated for consistent performance over hundreds of mating cycles
- Lock (K suffix) retention mechanism provides audible click and positive engagement confirmation, preventing accidental unmating in vibration or shock environments
Applications
The SFM-102-L2-FM-D-A-K-TR is designed for floating board-to-board stacking applications where thermal expansion or mechanical tolerance between two PCBs requires misalignment compensation up to ±0.3 mm. It is used in compact embedded modules, sensor daughter cards, and portable medical devices where precise board alignment cannot be guaranteed during assembly. The tape-and-reel format and SMT construction enable automated placement in high-volume production, while the lock mechanism ensures reliable retention in shock and vibration environments.
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 misalignment compensation does the floating-mount (FM) design of the SFM-102-L2-FM-D-A-K-TR provide, and why does this matter for stacked PCB assemblies?
The floating-mount design of the SFM-102-L2-FM-D-A-K-TR accommodates lateral misalignment of approximately ±0.3 mm between two PCBs, absorbing tolerance stack-up from PCB manufacturing, component placement, and differential thermal expansion. Without this float, a rigid 0.050 inch pitch 8-pin socket in a board stack would transfer misalignment forces directly to the solder joints, increasing the risk of fatigue cracking after 100 to 500 thermal cycles in products exposed to temperature swings.
How does the K (lock) retention feature on the SFM-102-L2-FM-D-A-K-TR prevent accidental disconnection compared to a standard SFM socket without locking?
The K suffix adds a mechanical latch or positive-lock feature on the SFM-102-L2-FM-D-A-K-TR that engages the mating header at full insertion depth, requiring deliberate release force to unmate. A standard SFM socket without locking relies only on contact friction for retention, which may allow unintended disconnection under vibration loads above 5g or handling during PCB assembly. The lock mechanism ensures that the 8-contact interface remains engaged during operation and transport.
In a portable medical device with limited board area, how does the 4-position SFM-102-L2-FM-D-A-K-TR compare to a standard board-to-wire connector for the same 8-signal interface?
At 0.050 inch (1.27 mm) pitch, the SFM-102-L2-FM-D-A-K-TR occupies approximately 5.1 mm in row length for 4 positions, far smaller than a wire-to-board connector that would typically use 0.100 inch or 0.079 inch pitch and require additional wire routing space. For an 8-signal path in a compact medical device, the SMT board-to-board approach of the SFM-102 eliminates cable weight, reduces assembly steps, and lowers the risk of wire fatigue failures compared to a wire-terminated alternative.
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