S1SDT-20-28-GF-39.37-L1 Samtec 1mm Micro Mate Cable Assembly

ElecSuppliers Part Number GuideAug 22, 2026

S1SDT-20-28-GF-39.37-L1 is a Samtec Micro Mate discrete wire cable assembly designed for compact wire-to-board and wire-to-wire interconnection. It uses a 1 mm pitch, double-row configuration and provides 40 positions through two 20-position socket connectors.

The part belongs to Samtec's S1SDT series of 1 mm discrete wire cable assemblies. This product family is designed to provide a compact alternative to larger cable connection systems where PCB space and connector height are important design considerations.

S1SDT-20-28-GF-39.37-L1 Key Specifications

The S1SDT-20-28-GF-39.37-L1 uses socket connectors at both ends, creating a female-to-female cable assembly. The connector configuration contains 40 signal positions in total, arranged as two rows of 20 positions.

The cable uses 28 AWG conductors and has a nominal length of 39.37 inches, equivalent to approximately 1 meter. The cable jacket is PTFE, while the connector system uses the Micro Mate design developed for compact interconnect applications.

The listed electrical ratings include a nominal current rating of 2.3 A and a voltage rating of 250 VAC/353 VDC. These values provide useful reference points when evaluating the cable assembly for a particular application, although the actual allowable current in a finished system should also take into account temperature rise, conductor configuration and installation conditions.

1mm Micro Mate Discrete Wire System

The 1 mm pitch is one of the main characteristics of the S1SDT family. A smaller pitch allows more contacts to be placed within a limited PCB or equipment area, which is useful in compact electronic assemblies.

Samtec's 1 mm discrete wire system supports both single-row and double-row configurations. The double-row versions can provide up to 40 positions, while the product family also includes different wire gauges, cable lengths and connector configurations.

The system uses crimp-style dual-leaf contacts and is designed for reliable connections in compact applications. Samtec positions its discrete wire products for cable-to-board, cable-to-cable and cable-to-panel applications.

S1SDT-20-28-GF-39.37-L1 Cable Design

The S1SDT-20-28-GF-39.37-L1 is supplied as a complete cable assembly rather than as two individual connectors that need to be assembled by the customer.

The socket connector at each end allows the cable assembly to mate with the corresponding connector components in the Micro Mate system. This can simplify manufacturing because the wiring, contact termination and connector assembly are supplied as a predefined interconnect.

The 40-position double-row arrangement is particularly useful when a system needs to transfer a relatively large number of signals through a small connector footprint. Instead of using multiple larger connectors, a single compact cable assembly can handle the required connections.

Applications for S1SDT-20-28-GF-39.37-L1

S1SDT cable assemblies can be considered for compact electronic equipment, industrial automation, instrumentation, embedded systems and other applications where high-density signal interconnection is required.

Samtec describes its discrete wire and cable assembly products as suitable for industrial, automation, military, automotive and medical applications. The actual suitability of S1SDT-20-28-GF-39.37-L1 depends on the electrical, mechanical and environmental requirements of the final equipment.

The compact 1 mm pitch makes this type of cable particularly relevant to applications where PCB real estate is limited. The 1 m cable length can also be useful when the connected boards or modules are separated within an enclosure or equipment assembly.

Why Choose a 1mm Cable Assembly

Traditional cable assemblies can occupy considerable PCB area when a large number of signals must be connected. A 1 mm pitch interconnect system provides a way to increase connection density without using a physically large connector.

For equipment manufacturers, a preassembled cable can also improve production consistency. Instead of manually terminating individual wires during final assembly, the completed cable can be installed as a single component.

This approach can reduce wiring complexity and make replacement or service easier, especially when the same cable assembly is used across multiple equipment configurations.

S1SDT-20-28-GF-39.37-L1 Replacement Considerations

When replacing S1SDT-20-28-GF-39.37-L1, the complete part number should be checked rather than searching only for the S1SDT series.

The number of positions, double-row arrangement, wire gauge, connector gender, cable length and termination configuration all affect compatibility. For this specific part, the 20 designation corresponds to the 20-position-per-row configuration, while the 39.37 designation identifies the approximately 1 m cable length.

Mouser currently identifies the exact part as a Samtec S1SDT Micro Mate double-row discrete wire cable assembly and lists it as a new product from the manufacturer. The distributor page currently shows a manufacturer lead time rather than on-hand stock, so procurement teams should confirm current availability before planning production quantities.

S1SDT-20-28-GF-39.37-L1 for Compact Electronics

S1SDT-20-28-GF-39.37-L1 combines a 1 mm pitch, 40-position double-row interface, 28 AWG cable and approximately 1 m length in a ready-made Micro Mate cable assembly.

Its compact form factor makes it relevant to modern electronic equipment where connector density and PCB space are important. For engineers looking for a small multi-position cable assembly, the S1SDT family provides multiple configurations that can be matched to different position counts and cable lengths.

Before selecting S1SDT-20-28-GF-39.37-L1 for production, engineers should verify the mating connector, electrical load, cable routing, operating temperature and mechanical requirements of the finished system. This ensures that the complete interconnect meets the requirements of the application rather than relying only on the connector's nominal specifications.