Good optocoupler operation for more stable power cycle capability and excellent temperature characteristics The shell is made of transparent high-temperature flame-retardant material, which is glossy, heat-, fire-, and dustproof, sturdy and . No contact, no noise, internal working method, no spark noise generation Solid state relays do not have mechanical components and are operated by thyristors to complete contact work Electroplated aluminum plate has excellent heat dissipation, Weight: 0.96562470756 Pounds, Manufacturer: PokFhgur