STMM-121-02-L-D-SM SAMTEC Connector (Other) In Stock
SAMTEC STMM-121-02-L-D-SM is a 42-position dual-row shrouded terminal strip at 2.00 mm pitch, designed as a cable-mate board connector. The surface-mount body and shrouded housing provide polarized, protected wire-to-board connections in a compact 2.00 mm pitch footprint.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- STMM-121-02-L-D-SM Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STMM-121-02-L-D-SM?
- 42-position dual-row shrouded design at 2.00 mm pitch protects all contacts from mechanical damage and ensures polarized mating
- Cable-mate termination style enables direct mating with SAMTEC IPMD or equivalent 2.00 mm pitch cable assemblies for field-replaceable connections
- Surface-mount (SM) termination style allows automated reflow soldering for high-volume PCB assembly production
What is STMM-121-02-L-D-SM used for?
The STMM-121-02-L-D-SM is suited for wire-to-board and cable-to-board applications in industrial control systems, embedded computing modules, and test equipment where 42 signals must connect reliably via a polarized shrouded interface at 2.00 mm pitch. Its surface-mount construction and shrouded housing provide both automated assembly compatibility and protection against accidental contact mismating during field service.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the STMM-121-02-L-D-SM datasheet?
STMM-121-02-L-D-SM Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for STMM-121-02-L-D-SM?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the position count and pitch of the STMM-121-02-L-D-SM, and how does the shrouded design benefit connector reliability?
The STMM-121-02-L-D-SM is a 42-position dual-row connector at 2.00 mm pitch. The shrouded housing encloses all contacts within a protective plastic frame, preventing accidental mating misalignment across the 42 pins and reducing the risk of bent contacts during repeated cable connection and disconnection in industrial or field-service environments.
What does the 'SM' suffix indicate for the STMM-121-02-L-D-SM and how does it affect the assembly process?
The 'SM' suffix designates a surface-mount termination style, meaning the connector leads are designed for reflow soldering directly onto PCB pads. This enables automated pick-and-place assembly at standard SMT reflow temperatures (typically 260°C peak for SAC305), avoiding the through-hole drilling required for pin-through-board variants and reducing PCB manufacturing cost for the 42-position STMM series.
Which cable assemblies are compatible with the STMM-121-02-L-D-SM as cable-mate connectors?
The STMM-121-02-L-D-SM is designed to mate with SAMTEC's IPMD or equivalent 2.00 mm pitch dual-row cable-mate plug assemblies. Compatible mating connectors accommodate standard 28 AWG to 26 AWG discrete wires or pre-made cable harnesses, providing a keyed and latched connection across all 42 positions for vibration-resistant operation in industrial environments.
How does the STMM-121-02-L-D-SM compare to non-shrouded 42-position headers for applications requiring frequent mating cycles?
Non-shrouded headers expose all 42 pins to potential misalignment during repeated mating, with a higher risk of damage at 2.00 mm pitch when operators connect cables in low-visibility conditions. The STMM-121-02-L-D-SM's shroud guides the cable-mate plug into correct alignment and limits lateral stress on individual pins, extending usable mating cycle life beyond 30 cycles compared to unshrouded headers in the same application.
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