Relay Coil Power Consumption: What Engineers Must Know
203.00 £
Published date: 2025/10/08
- Location: 5119, Town of Fairview, Minnesota, United States
When designing or maintaining systems that use relays understanding relay coil power consumption is vital for stable operation and heat control. The coil is the circuit segment that generates a magnetic field to activate or deactivate the switching mechanism. This actuation field requires power input, and the level of energy consumption the coil consumes directly affects system efficiency.
Coils are commonly specified for standard voltage levels such as 12V. The energy usage by the coil is determined via the product of voltage and current. For example, a 12V DC relay with a current consumption of 0.03A consumes 360 milliwatts of power. While this may seem insignificant, in systems with multiple relay modules the cumulative power draw can become substantial, especially in energy-constrained or harsh power budget systems.
Coil power consumption is not constant.
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