KT603 12V Cube Relay
The KT603 12V Cube Relay is a compact, general-purpose electromagnetic relay designed for switching medium-power loads in control, automotive, and industrial applications. Operating on a 12V DC coil, it offers reliable performance with low power consumption and fast response times.
Encased in a durable plastic “cube” housing, the KT603 relay provides excellent electrical insulation and mechanical strength. It features SPDT (1C) or SPST (1A) contact configurations with a contact rating up to 10A at 240VAC or 12A at 120VAC, making it suitable for a wide range of AC and DC switching tasks.
With its small footprint, high dielectric strength, and wide operating temperature range (-40°C to +85°C), the KT603 is ideal for PCB mounting in compact electronic assemblies or plug-in relay sockets.
Specifications of KT603 12V Cube Relay –
| Parameter | Value |
|---|---|
| Coil Voltage | 12V DC |
| Contact Configuration | SPDT (1 Form C) / DPDT (optional) |
| Contact Rating | 10A–40A (depending on model) |
| Coil Resistance | ~90–150Ω (typical) |
| Operate Time | ≤10 ms |
| Release Time | ≤5 ms |
| Contact Material | Silver Alloy |
| Mounting Type | Plug-in / PCB / Socket mount |
| Operating Temperature | -40°C to +85°C |
| Housing | Dust-protected or sealed cube-type plastic enclosure |
| Terminal Type | Quick connect / PCB pins |
Applications of KT603 12V Cube Relay–
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Automotive lighting and horn control
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Industrial automation systems
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Power control panels
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HVAC systems
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Battery management circuits
Package Contains –
2 x KT603 12 V Cube Relay






