STMM-120-02-F-D-SM SAMTEC Connector (Other) In Stock
SAMTEC STMM-120-02-F-D-SM is a 240-position, 2.00 mm pitch dual-row surface mount board stacking connector with male phosphor bronze contacts and gold-flash-over-nickel mating finish. Supports high-density vertical board stacking. From $18.50, in stock, worldwide shipping available.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 40
- Lifecycle
- ACTIVE
- Datasheet
- STMM-120-02-F-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
- 240-position (2×120) dual-row board stacking connector on 2.00 mm pitch for ultra-high-density vertical board-to-board interconnect
- Phosphor bronze contacts with gold-flash-over-nickel mating finish deliver reliable signal integrity and corrosion resistance across extended mating cycles
- Surface mount (SM) termination with tin-over-nickel barrier enables standard reflow soldering and automated PCB assembly compatibility
Applications
The STMM-120-02-F-D-SM is engineered for high-density board stacking applications in embedded computing, telecom line cards, and industrial rack systems requiring 240 reliable male pin connections between two PCBs. Its 2.00 mm pitch and surface mount termination suit compact multi-board assemblies where vertical stacking height and signal density are critical design constraints.
Specifications
| Pbfree Code | Yes |
| YTEOL | 8 |
| Body Breadth | 0.257inch |
| Body Depth | 0.19inch |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Finish Mating | GOLD FLASH 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 |
| Filter Feature | NO |
| Insulator Material | POLYAMIDE |
| JESD-609 Code | e3 |
| Mating Contact Pitch | 0.079inch |
| Mating Contact Row Spacing | 0.079inch |
| 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 |
| PCB Contact Pattern | RECTANGULAR |
| PCB Contact Row Spacing | 2.0066mm |
| Plating Thickness | FLASH inch |
| Polarization Key | POLARIZED HOUSING |
| Rated Current (Signal) | 3A |
| Terminal Pitch | 2.0066mm |
| 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 contact pitch and total pin count does STMM-120-02-F-D-SM provide for board stacking?
The STMM-120-02-F-D-SM uses a 2.00 mm pitch in a dual-row male configuration, providing 240 total contact positions (2×120). This high pin count makes it suitable for board stacking applications in telecom, industrial, and embedded computing systems where large numbers of signals must pass between 2 boards simultaneously.
What contact material and plating are specified for STMM-120-02-F-D-SM mating and termination?
The mating contacts use gold-flash-over-nickel finish (50 microinch nickel base) providing corrosion resistance for signal-level connections. The termination side uses tin with a nickel barrier to ensure reliable reflow solder joint formation. The contact material is phosphor bronze, which provides good spring retention and electrical conductivity rated for repeated mating cycles.
How does the SM suffix in STMM-120-02-F-D-SM affect PCB assembly and layout planning?
The SM suffix designates surface mount termination, meaning all 240 pins are soldered directly to SMT pads on the PCB surface without through-hole drilling. This enables double-sided board assembly, reduces PCB layer via counts, and allows automated reflow soldering compatible with standard pick-and-place equipment for high-volume production of multi-board stacking assemblies.
For a dual-board industrial control system, at what board-to-board stacking height does STMM-120-02-F-D-SM operate?
STMM-120-02-F-D-SM is designed for 2.00 mm pitch board stacking configurations; body depth measures approximately 0.19 inch (4.8 mm), which defines the compressed mated stack height. This compact profile suits industrial control backplanes and embedded system modules where vertical clearance between two PCBs is limited to under 6 mm while maintaining 240 reliable signal contacts.
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