80 Amp 3-phase 70-280V AC to AC solid state relay (SSR) features high structural strength, good impact resistance, and strong shock resistance. The SSR offers a reliable switching the commercial and industrial loads, such as computer peripheral interface device, printing machine, molding machine, food machine, packaging machine, and so on.
- Built in RC absorption
- Photoelectric isolation
- SCR output
- LED indicator for operation status
- Removable protective cover for safety
- Panel mount
- Zero-crossing switch type
||Control voltage range
|Max. input current
|Must operate voltage
|Must release voltage
||Load voltage range
|Maximum off-state leakage current
|Maximum off-state time
|Maximum on-state voltage drop
||AC to AC, 3 phase
|Dimension L – W – H (mm)
|Dielectric strength (input to output)
|Dielectric strength (input, output to the base)
When the load current is higher than 10A, a heat sink must be installed to the solid state relay, or the SSR relay should be mounted on a metal base plate with heat dissipation effect, and the thermal grease is applied between them.
When the load current is 40A or more, a fan cooling radiator or water cooling radiator must be equipped.
||Heat sink for 3 phase SSR
||Mounting Hole Diameter: 3mm
Groove Distance: 84mm
||≤150A 3 phase solid state relay
Dimensions (Unit: mm)
Tips: Solid state relay's working principle
SSR can be divided into AC SSR and DC SSR according to applications, which can act as the load switch in the AC or DC power supply respectively, and therefore, cannot be mixed. The AC SSR is taken as an example to illustrate the working principle solid state relay. As a whole, SSR has only two inputs (A and B) and two outputs (C and D), which is a four-terminal device.
In its operation, as long as the A, B are given a certain control signal, you can control on-off state between C and D to achieve the switch function, in which the function of the coupling circuit is to provide an input/output channel for control signals input from A and B, but electrically disconnect input and output of SSRs to prevent the output from affecting the input. Components used in the coupling circuits are optical couplers, which has good action sensitivity, high response speed, high level of input/output insulation (withstand voltage). The load at the input is a light-emitting diode, which makes the SSR input very easy to match input signal level. In the usage, it can be directly connected with the computer output interface, that is, it is controlled by the logic level of "1" and "0".