STMM-121-02-G-D-SM SAMTEC Connector (Other) In Stock
SAMTEC STMM-121-02-G-D-SM is a 2.00 mm pitch shrouded terminal strip with 42-position dual-row male contacts, gold-over-nickel termination, and square pin style. Body measures 1.88 inch long; available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- STMM-121-02-G-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
- 42-position dual-row (21x2) shrouded board connector at 2.00 mm pitch with 1.88 inch body length for extended high-density cable-to-board interfaces
- Gold-over-nickel barrier termination finish ensures long-term corrosion resistance and reliable soldering adhesion in demanding environments
- Rectangular contact pattern with square pin style (SQ PIN-SKT) compatible with both single-ended and socket cable mates for flexible system integration
Applications
The STMM-121-02-G-D-SM is ideal for industrial automation and embedded control platforms where a 42-pin 2.00 mm pitch cable-to-board interface is needed along a 1.88 inch connector span. Its gold-over-nickel termination makes it well-suited for high-reliability applications such as medical equipment and aerospace ground support systems. The shrouded housing protects male contacts against mechanical damage during frequent cable mating cycles in field-deployed environments.
Specifications
| YTEOL | 8.4 |
| Body Breadth | 0.257inch |
| Body Depth | 0.24inch |
| Body Length | 1.88inch |
| Connector Type | BOARD CONNECTOR |
| Contact Finish Termination | Gold (Au) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| Contact Pattern | RECTANGULAR |
| Contact Style | SQ PIN-SKT |
| Filter Feature | NO |
| Insulator Color | BLACK |
| Insulator Material | LIQUID CRYSTAL POLYMER |
| JESD-609 Code | e4 |
| Mating Contact Pitch | 0.078inch |
| Mating Contact Row Spacing | 0.078inch |
| Mating Information | MULTIPLE MATING PARTS AVAILABLE |
| Mixed Contacts | NO |
| Mounting Option 1 | GUIDE SLOT |
| 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 | 4.66mm |
| Plating Thickness | 20u inch |
| Polarization Key | POLARIZED HOUSING |
| Rated Current (Signal) | 3A |
| Reference Standard | UL |
| Terminal Pitch | 2mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 42 |
| 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 are the body dimensions and pin count of the STMM-121-02-G-D-SM?
The STMM-121-02-G-D-SM has a body length of 1.88 inch, breadth of 0.257 inch, and depth of 0.24 inch, housing 42 male pins in a dual-row (21x2) layout at 2.00 mm pitch. This extended body length accommodates high circuit counts while keeping the connector footprint narrow for space-constrained PCB designs.
Why choose the gold-over-nickel termination on STMM-121-02-G-D-SM over a tin termination option?
Gold over nickel provides superior oxidation resistance compared to tin, maintaining low contact resistance over the solder joint's lifetime even in humid or thermally cycled environments. For the 42 termination pads at 2.00 mm pitch, this finish ensures consistent solderability during wave or reflow processes and is preferred in high-reliability PCB assemblies where rework is costly.
Which cable mate types are compatible with the STMM-121-02-G-D-SM for a 42-circuit harness?
The STMM-121-02-G-D-SM uses a square pin (SQ PIN-SKT) contact style at 2.00 mm pitch, compatible with SAMTEC's discrete wire cable mates designed for 42 circuits. Mating options typically support wire gauges from 26 AWG to 30 AWG and can carry signal currents up to approximately 2 A per contact, suitable for multi-signal harness assemblies in industrial controllers.
Related Guides
How to Choose a Digital Potentiometer: AD5204, AD5206, and AD8403 Selection Guide
Compare the AD5204, AD5206, and AD8403 multi-channel SPI digipots by channel count, resistance value, and package to choose the right Analog Devices digital potentiometer for your design.
Jun 21, 2026
AD7745 / AD7746 / AD7747 Capacitance-to-Digital Converter Design Guide
Complete application note for the AD774x CDC family: circuit design, shielding, conversion rate selection, and sourcing guidance for the AD7745, AD7746, and AD7747.
Jun 21, 2026
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
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.
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.”