SFM-135-T2-FM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-135-T2-FM-D-A-K is a 70-position dual-row high-reliability socket strip with 0.050" pitch, surface mount termination, and keying for positive mating polarization, ideal for dense board-to-board interconnects. Available in stock worldwide with fast shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 70
- Lifecycle
- ACTIVE
- Datasheet
- SFM-135-T2-FM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 70-position dual-row surface mount socket strip at 0.050" (1.27 mm) pitch supports high-density interconnection with 35 contacts per row
- Keying (-K) polarization feature physically prevents incorrect connector mating in multi-connector PCB assemblies
- High-reliability gold-over-nickel contact finish maintains low contact resistance over thousands of insertion cycles
Applications
The SFM-135-T2-FM-D-A-K is engineered for dense daughter-card and mezzanine board interfaces in FPGA platforms, embedded computing modules, and high-speed signal acquisition systems. The keying option makes it particularly suitable for multi-connector assemblies where 70-position dual-row 0.050" pitch connectors must be protected against mis-mating during field installation or production test.
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
How does the 0.050" pitch of the SFM-135-T2-FM-D-A-K affect PCB routing density compared to 0.100" pitch alternatives?
At 0.050" (1.27 mm) pitch, the SFM-135-T2-FM-D-A-K occupies roughly half the board length of an equivalent 0.100" pitch connector with the same 70-position dual-row count. This enables tighter via and trace routing between connector positions, supporting higher-frequency signal integrity and freeing board area for additional components in compact FPGA or embedded processor designs.
For a modular test fixture with multiple identical connector sites, how does the -K keying prevent mis-insertion?
The -K keying feature adds a physical polarization tab that mates only with a correspondingly keyed header, making it impossible to insert a 70-position SFM-135-T2-FM-D-A-K socket into an adjacent unkeyed or differently keyed 0.050" pitch header. This prevents pin-shift errors in automated test equipment where multiple 70-pin 0.050" connectors are placed in close proximity on the same PCB fixture.
What current rating should engineers expect per contact on the SFM-135-T2-FM-D-A-K when allocating power pins?
SAMTEC's 0.050" pitch SFM series contacts are typically rated for approximately 1 A per pin at standard derating conditions, though the exact value depends on PCB thermal environment and adjacent signal pins. For the 70-position dual-row configuration, designers commonly group multiple pins together to carry higher supply currents while reserving the majority of the 70 contacts for signal routing.
Is the SFM-135-T2-FM-D-A-K compatible with standard SMT reflow soldering profiles?
Yes, the SFM-135-T2-FM-D-A-K uses surface mount termination designed for compatibility with standard SMT reflow soldering processes, including lead-free profiles peaking at approximately 260°C. The component can be processed on automated SMT lines with pick-and-place machines, making it suitable for high-volume production of dense 70-position dual-row 0.050" pitch interconnect assemblies.
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