STMM-125-02-L-D-SM SAMTEC Connector (Other) In Stock
SAMTEC STMM-125-02-L-D-SM is a 50-position dual-row surface-mount board stacking connector with 1.27 mm pitch, gold-over-nickel contact finish, and phosphor bronze contacts for reliable signal integrity. RoHS-compliant construction with tin termination and nickel barrier.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 50
- Lifecycle
- ACTIVE
- Datasheet
- STMM-125-02-L-D-SM Datasheet PDF
- Category
- Connector
- Price
- From $2.7929(MOQ 25)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STMM-125-02-L-D-SM?
- 50-position dual-row board stacking connector at 1.27 mm pitch for high-density SMT interconnects
- Gold (10 µin) over nickel (50 µin) contact finish delivering low contact resistance and long-term corrosion protection
- Phosphor bronze contacts with tin-over-nickel termination providing superior spring force and reliable electrical performance
- RoHS-compliant surface-mount design compatible with standard reflow soldering processes up to 260°C
What is STMM-125-02-L-D-SM used for?
The STMM-125-02-L-D-SM is designed for board stacking applications in embedded computing, industrial automation, and telecommunications equipment where 50 signal positions must be routed between parallel PCBs at 1.27 mm pitch. Its surface-mount format supports automated reflow assembly and is well-suited to compact multi-board stack architectures. The gold contact finish ensures reliable mating performance in high-cycle or vibration-prone environments.
What are the specifications of STMM-125-02-L-D-SM?
| Pbfree Code | Yes |
| Factory Lead Time | 3Weeks |
| YTEOL | 8 |
| Body Breadth | 0.257inch |
| Body Depth | 0.19inch |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Finish Mating | GOLD (10) OVER NICKEL (50) |
| Contact Finish Termination | Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| Contact Material | PHOSPHOR BRONZE |
| Contact Pattern | RECTANGULAR |
| Contact Style | SQ PIN-SKT |
| DIN Conformance | NO |
| Filter Feature | NO |
| IEC Conformance | NO |
| Insulator Material | POLYAMIDE |
| JESD-609 Code | e3 |
| MIL Conformance | NO |
| Mating Contact Pitch | 0.079inch |
| Mating Contact Row Spacing | 0.079inch |
| Mating Information | MULTIPLE MATING PARTS AVAILABLE |
| Mixed Contacts | NO |
| Mounting Option 1 | LOCKING |
| Mounting Style | STRAIGHT |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number Of PCB Rows | 2 |
| Number of Rows Loaded | 2 |
| Option | GENERAL PURPOSE |
| PCB Contact Pattern | RECTANGULAR |
| PCB Contact Row Spacing | 2.0066mm |
| Plating Thickness | 10u inch |
| Polarization Key | POLARIZED HOUSING |
| Rated Current (Signal) | 3A |
| Terminal Pitch | 2mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 50 |
| 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 |
Where can I find the STMM-125-02-L-D-SM datasheet?
STMM-125-02-L-D-SM Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for STMM-125-02-L-D-SM?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What contact finish does the STMM-125-02-L-D-SM use and why does it matter for signal integrity?
The STMM-125-02-L-D-SM uses gold (10 µin) over nickel (50 µin) on mating surfaces, ensuring low and stable contact resistance typically below 20 milliohms. This finish prevents oxidation and corrosion over hundreds of mating cycles, making it suitable for high-reliability board stacking in industrial and telecom equipment.
How does the surface-mount termination style of STMM-125-02-L-D-SM affect PCB assembly?
The surface-mount (-SM) termination is compatible with standard SMT reflow soldering at peak temperatures up to 260°C. This eliminates the need for through-hole drilling, reducing PCB fabrication cost and enabling finer-pitch board layouts while maintaining a 1.27 mm mating pitch across 50 positions.
Which board stacking applications benefit most from the STMM-125-02-L-D-SM dual-row design?
Embedded computing modules, FPGA mezzanine cards, and industrial I/O boards that require 50 signal pins between parallel PCBs are ideal matches for this connector. The dual-row 1.27 mm pitch layout fits within a body breadth of 0.257 inch, conserving board area in space-critical multi-board stack assemblies.
What is the factory lead time and lifecycle status for the STMM-125-02-L-D-SM?
SAMTEC lists a standard factory lead time of 3 weeks for the STMM-125-02-L-D-SM. The part is RoHS-compliant and carries a phosphor bronze contact material rated for consistent performance across at least 1000 mating cycles, with global distribution supporting worldwide shipping.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 25+ | $8.7760 | $219.40 |
| 50+ | $8.4600 | $423.00 |
| 100+ | $6.6900 | $669.00 |
| 500+ | $5.5036 | $2751.80 |
| 1000+ | $4.1761 | $4176.05 |
| 2000+ | $2.7929 | $5585.72 |
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.”
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