automotive relay in extreme temperature： ensuring reliability in harsh conditions
Release time:2025-09-24 23:46:08
Automotive relays are essential components in modern vehicles, enabling the efficient control of electrical systems such as lights, airbags, and engine control units. These small but powerful devices are used to switch large currents in circuits using a small current from a control source. While relays are critical to the operation of a car, their performance can be severely impacted by extreme temperatures. This article explores the challenges faced by Automotive relays in extreme temperature environments, their design considerations, and how manufacturers are adapting to ensure reliability in both high and low-temperature conditions.
The Challenges of High and Low Temperatures
High-Temperature Stress
Vehicles are exposed to a wide range of temperatures depending on geographical location, driving conditions, and engine performance. High temperatures, especially near engine compartments and exhaust systems, can reach up to 125°C or even higher. These extreme conditions can have several detrimental effects on
Automotive relays.
The most obvious concern is heat-induced degradation of the relay's internal components. The contact points within the relay are particularly vulnerable, as excessive heat can cause them to degrade, resulting in poor conductivity and eventual failure. Heat also affects the insulating materials, leading to thermal breakdown or cracking, which compromises the relay’s electrical integrity. Additionally, higher temperatures can cause the relay's coil to overheat, causing it to lose its magnetic properties, which are essential for its operation.
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