Features

SSR 40A solid state relays are of high strength, impact resistance and strong vibration resistance, with low requirement for input current. Solid state relay is ideal for automatic process control application, a must component for temperature controller and other machinery control system. Commonly used in situations where precise control of current and voltage is required.

• Exquisite workmanship
• Photoelectric isolation
• SSR output
• LED indicator for operation status
• Removable protective cover for safety
• Panel mount
• Zero-crossing switch type

Specification

Dimension

Wiring Diagram

Tips: Over-current protection measures for solid-state relays

Solid-state relays use semiconductor switching devices as power output components and are sensitive to temperature changes. Over-current can cause the semiconductor chip to overheat, resulting in degradation of quality, reduced life, or even permanent damage. Although solid-state relays can instantaneously accept inrush currents of more than 10 times the rated current, exceeding this value can easily cause permanent damage. Therefore, overcurrent protection is very important.

There are many protection methods for overcurrent, and the key is to respond quickly. General protection circuits are ineffective, and fast fuses dedicated to semiconductor devices should be considered. The nominal fusing current of the fuse should not exceed the SSR nominal current value. There are many types of fast fuses on the market, but the quality varies greatly, please pay attention when choosing.