STMM-110-02-L-D-SM SAMTEC Connector (Other) In Stock
SAMTEC STMM-110-02-L-D-SM is a 20-position dual-row RoHS-compliant board stacking connector with gold-over-nickel mating contacts and phosphor bronze contact material. Features tin-over-nickel barrier termination and surface mount footprint for reliable mezzanine board interconnects. Available in stock worldwide with competitive pricing.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- STMM-110-02-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
- Gold (10 µin) over nickel (50 µin) mating contacts on phosphor bronze base provide low resistance and long mating cycle life
- Tin-over-nickel barrier termination finish ensures lead-free solderability and prevents tin whisker formation in RoHS-compliant assemblies
- Dual-row board stacking SMT design enables compact mezzanine interconnect with a 0.257" x 0.19" cross-section footprint
Applications
The STMM-110-02-L-D-SM is designed for board stacking mezzanine interconnects in embedded computing modules, RF signal processing boards, and compact industrial controllers where a dual-row SMT connector with gold contacts is required for long-term signal reliability. Its RoHS-compliant phosphor bronze construction and tin-nickel termination make it a preferred choice for telecommunications hardware, medical devices, and defense electronics requiring IPC Class 2 or Class 3 assembly standards.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 3 Weeks, 5 Days |
| 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 | 20 |
| 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 material and finish combination does STMM-110-02-L-D-SM use, and how does this impact long-term connector reliability?
The STMM-110-02-L-D-SM uses phosphor bronze contacts plated with 10 microinches of gold over 50 microinches of nickel on the mating surfaces, and tin with a nickel barrier on the termination side. Phosphor bronze provides excellent spring-back after deflection, while gold plating ensures stable contact resistance below 10 milliohms over thousands of mating cycles in board stacking applications.
For a medical device PCB assembly requiring lead-free compliance, how does STMM-110-02-L-D-SM satisfy RoHS requirements?
The STMM-110-02-L-D-SM is fully RoHS compliant (Pbfree Code: Yes), with tin-over-nickel barrier termination that eliminates lead from the solder interface. The nickel barrier prevents tin-copper intermetallic growth that degrades solder joint reliability, making the connector suitable for medical-grade PCB assemblies that must meet IEC 62321 substance restrictions and withstand reflow temperatures up to 260°C.
What lead time should procurement teams plan for when ordering STMM-110-02-L-D-SM in production quantities?
SAMTEC lists a factory lead time of approximately 3 weeks and 5 days for the STMM-110-02-L-D-SM board stacking connector. For production runs exceeding a few hundred units, procurement teams should factor this 4-week buffer into supply chain scheduling to avoid assembly line stoppages, particularly when building dual-row SMT mezzanine boards for industrial or telecommunications equipment.
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