SFM-120-02-L-DH-TR SAMTEC Connector (Other) In Stock
The SAMTEC SFM-120-02-L-DH-TR is a 40-position (20×2) female socket board connector on 1.27 mm pitch with dual horizontal SMT tails, polarization, and tin-over-nickel contact finish. Supplied in tape-and-reel for automated pick-and-place assembly, it provides a compact, low-profile board-to-board or board-to-module mating interface suitable for high-density embedded computing and RF module applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 44
- Lifecycle
- ACTIVE
- Datasheet
- SFM-120-02-L-DH-TR Datasheet PDF
- Category
- Connector
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 40-position (20×2) dual-row layout on 1.27 mm (0.050 inch) pitch enables high-density signal routing in a footprint roughly half the size of equivalent 2.54 mm pitch connectors
- Polarized housing prevents 180-degree mis-mating, protecting sensitive PCB circuitry during repeated module insertion and removal cycles
- Tin-over-nickel (Sn/Ni) contact finish on horizontal SMT terminations provides reliable solderability and corrosion resistance across a wide operating temperature range
Applications
The SFM-120-02-L-DH-TR is widely used as a stacking socket on FPGA development boards and single-board computers where daughter modules carrying RF transceivers, memory, or sensor arrays must connect to the host PCB with minimal height overhead. Its 1.27 mm pitch dual-row female socket also appears in test and measurement fixtures that require repeatable, polarized blind-mate connections to calibration modules. The tape-and-reel packaging makes it a natural fit for high-volume consumer electronics and industrial IoT gateway assemblies built on automated SMT lines.
Specifications
| Factory Lead Time | 4Weeks |
| YTEOL | 9.4 |
| Additional Feature | POLARIZED |
| Body/Shell Style | SOCKET |
| Connector Type | BOARD CONNECTOR |
| Contact Finish Mating | NOT SPECIFIED |
| Contact Finish Termination | Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | FEMALE |
| Contact Material | NOT SPECIFIED |
| DIN Conformance | NO |
| Filter Feature | NO |
| IEC Conformance | NO |
| JESD-609 Code | e3 |
| MIL Conformance | NO |
| Mixed Contacts | NO |
| Mounting Style | RIGHT ANGLE |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number of Rows Loaded | 2 |
| Option | GENERAL PURPOSE |
| Rated Current (Signal) | 3.2A |
| Terminal Pitch | 1.27mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 40 |
| UL Flammability Code | 94V-0 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
| Country of Origin | Malaysia, USA |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SFM-120-02-L-DH-TR:
suggested
Frequently Asked Questions
What is the contact pitch and row configuration of the SFM-120-02-L-DH-TR, and how does it affect PCB routing density?
The SFM-120-02-L-DH-TR uses a 1.27 mm (0.050 inch) pitch with 20 contacts per row and 2 rows, totalling 40 positions. Compared to a standard 2.54 mm pitch socket, this halves the connector length to approximately 25.4 mm for 20 columns, freeing significant board real estate on dense PCB designs and allowing 40 signals to pass through a single low-profile connector.
How does the dual horizontal (DH) SMT tail style of the SFM-120-02-L-DH-TR simplify PCB footprint design compared to through-hole alternatives?
The dual horizontal SMT tail style means both rows of contacts terminate as flat, co-planar solder pads rather than through-hole pins, eliminating the need for 40 drilled holes in the PCB. This reduces fabrication cost, allows the part to be placed and reflowed in a standard SMT process without wave soldering, and keeps the solder joint on the same side as the component for easy automated optical inspection.
For how many mating cycles is the SAMTEC SFM series socket rated, and how does that affect module swap planning?
SAMTEC SFM series connectors are typically rated for a minimum of 30 mating cycles, which is sufficient for engineering bring-up, production test, and occasional field module replacement. For applications requiring hundreds of insertions—such as daily-swapped calibration modules—designers should consider SAMTEC's high-cycle alternatives or add a connector guide rail to distribute insertion force evenly across all 40 contacts.
When should a designer choose the TR (tape-and-reel) packaging variant of the SFM-120-02-L-DH-TR over tray or tube packaging?
The TR variant is the right choice for any production line running automated pick-and-place machines at volumes above roughly 500 boards per month. Tape-and-reel packaging feeds continuously into the placement head without operator intervention, reducing machine stoppages and placement errors. At lower volumes or for prototyping, tray or tube variants may be more economical since they avoid the minimum reel quantity—often 500 to 1000 pieces—that tape-and-reel orders require.
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