Thermal protectors play a crucial role in preventing overheating in various electrical and electronic devices, ensuring their safety and longevity. Among the different types of thermal protectors, “Normally Open” and “Normally Closed” variants are commonly used. In this article, we will delve into the world of thermal protectors, exploring their functions, differences, and applications.
Introduction to Thermal Protectors Thermal protectors, also known as thermal switches or thermal cutoffs, are essential components in appliances and machinery that generate heat during operation. They serve as fail-safe mechanisms to interrupt the power supply to these devices when they exceed a specific temperature threshold. This intervention prevents potential fires, damage to components, and ensures user safety. Normally Open vs. Normally Closed Thermal protectors come in two primary configurations: Normally Open (NO) and Normally Closed (NC). The key distinction between them lies in their default state: Normally Open (NO):A NO thermal protector is normally disconnected (open) when the temperature is below the set threshold. When the temperature exceeds the specified limit, it closes the circuit, cutting off power to the device. This action prevents further heating and protects the device from potential damage.
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