Solid state relay SSR40AA-3P
Solid state relay (SSR) is an electronic switching device that switches states when an external voltage is applied along its n-type and p-type junctions. SSR has a small control signal that controls a larger load current or voltage. It consists of a sensor which responds to an appropriate input (control signal), a solid-state electronic switching device […]
Solid state relay (SSR) is an electronic switching device that switches states when an external voltage is applied along its n-type and p-type junctions. SSR has a small control signal that controls a larger load current or voltage. It consists of a sensor which responds to an appropriate input (control signal), a solid-state electronic switching device which switches power to the load circuitry, and some coupling mechanism to enable the control signal to activate this switch without mechanical parts. The relay may be designed to switch either AC or DC to the load. It serves the same function as an electromechanical relay, but has no moving parts
Specification
| Load current | 10A-200A |
| Load voltage | 24-480VAC |
| Control voltage | 70-280VAC |
| Control current | 10-68mA |
| On state voltage drop | ≤1.8VAC |
| On state leakage current | ≤10mA |
| Off state time | ≤10mS |
| Dielectric strength | 2500VAC |
| Insulation resistance | 1000MΩ500VDC |
| Ambient temperature | -30°c ~ 75°c |
| Mounting method | bolting |
| Indicator | LED |
-
Why Air Circuit Breakers (ACBs) Matter in Modern Data Centers？
Introduction In today's digital-driven environment, data centers have become the operational ...
Date:2025-11-18 -
Why Are Residual Current Circuit Breakers (RCCBs) Becoming Essential in Modern Electrical Systems?
Introduction Why Are Residual Current Circuit Breakers Becoming Essential in Modern Electrica...
Date:2025-12-16
Why Is Short-Circuit Coordination Important in a Motor Starter?
A motor starter does more than switch a motor on and off. It must also protect the motor circuit when...
Date: 2026/06/11
Circuit Breaker vs Contactor vs Overload Relay: What Is the Difference?
Quick Answer A circuit breaker, contactor, and overload relay are often installed together in a motor control circuit, but they...
Date: 2026/06/09
What Wire Size Mistakes Can Make a 60 Amp Breaker Unsafe?
Quick Answer A 60 amp breaker wire size should not be selected from the breaker rating alone. Although 6 AWG copper...
Date: 2026/06/08
What Is the Purpose of a Miniature Circuit Breaker in a Low-Voltage Electrical System?
Quick Answer The main purpose of a Miniature Circuit Breaker is to protect low-voltage electrical wiring and circuits against excessive current...
Date: 2026/06/05
Why Is MCB Protection Not Only About Rated Current?
Quick Answer MCB protection is not only about rated current because an MCB must protect the whole circuit, not just...
Date: 2026/06/03