STMM-120-02-L-D-SM SAMTEC Connector (Other) In Stock
SAMTEC STMM-120-02-L-D-SM is a 40-position dual-row board stacking connector with gold-over-nickel contacts on 2.00 mm pitch. RoHS compliant and rated for repeated mating cycles in compact PCB assemblies. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 40
- Lifecycle
- ACTIVE
- Datasheet
- STMM-120-02-L-D-SM 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 dual-row male board stacking connector on 2.00 mm pitch for high-density PCB interconnects
- Gold (10 µin) over Nickel (50 µin) mating contacts with tin-over-nickel termination for reliable signal integrity
- Phosphor bronze contact material ensures robust spring force and low insertion loss across ≥100 mating cycles
- RoHS compliant construction with Surface Mount (SM) termination style for automated reflow assembly
Applications
The STMM-120-02-L-D-SM is used in board-to-board stacking applications within industrial control systems, embedded computing modules, and test instrumentation where a 2.00 mm pitch dual-row connector with 40 positions is required. Its surface-mount termination makes it compatible with standard SMT reflow processes on compact PCBs. The gold-plated contacts support reliable signal routing in data acquisition and communication backplane designs.
Specifications
| Pbfree Code | Yes |
| 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 | 40 |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the pitch and number of positions for the STMM-120-02-L-D-SM?
The STMM-120-02-L-D-SM is a dual-row male board stacking connector with 40 positions arranged on a 2.00 mm pitch, making it suitable for high-density PCB-to-PCB interconnects in space-constrained designs.
What contact finish does the STMM-120-02-L-D-SM use, and why does it matter for mating reliability?
The mating contacts are plated with 10 µin gold over 50 µin nickel, providing corrosion resistance and low contact resistance across a minimum of 100 mating cycles. The tin-over-nickel termination finish on the solder tails is compatible with standard lead-free reflow soldering at temperatures up to 260°C.
Which PCB assembly processes are compatible with the STMM-120-02-L-D-SM surface-mount termination?
The SM (Surface Mount) termination style allows the STMM-120-02-L-D-SM to be placed and reflowed using standard automated SMT equipment. The body dimensions of 0.257 inch breadth and 0.19 inch depth keep the connector footprint compact, supporting reflow profiles up to 260°C peak temperature on both rigid and semi-flexible PCB assemblies.
Is the STMM-120-02-L-D-SM compliant with RoHS regulations?
Yes, the STMM-120-02-L-D-SM is fully RoHS compliant. It uses lead-free tin-nickel termination finish, phosphor bronze contacts, and packaging materials that meet EU RoHS 2 Directive 2011/65/EU restrictions on 6 hazardous substances.
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