The JST SM is a compact 2.5mm pitch wire-to-wire connector that has become ubiquitous in LED lighting, hobby electronics, 3D printers, and small appliance wiring. Manufactured by Japan Solderless Terminals, the SM series features a simple snap-lock housing with tin-plated crimp contacts rated at 3 amps per pin. Available in 2 to 12-pin configurations, the SM connector is popular for its low cost, wide availability, and ease of use. The connector's polarized housing prevents reverse mating, and the compact 2.5mm pitch keeps interconnects small. JST SM connectors are the de facto standard for addressable LED strip connections, RC hobby battery balance leads, and internal wiring in consumer electronics. Their prevalence in the maker and hobbyist community makes them one of the most recognized small connector families in the world.
Specifications
Pin Count
4
Wire Gauge Range
28–22 AWG
Voltage Rating
250 VAC
Current Rating
3A continuous
IP Rating
IP20
Mating Cycles
30
Operating Temp
-25°C to +85°C
Key Features
Compact 2.5mm pitch wire-to-wire connector
Available in 2 to 12-pin configurations
Polarized housing prevents reverse mating
Snap-lock mechanism for secure connections
Tin-plated crimp contacts rated at 3A
De facto standard for LED strip and hobby electronics
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