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D2425 240VAC Panel Mount Solid State Relay

The D2425 is a Solid State Relay that can operate between 24 to 280 VAC and has a current handling capacity of 10A - 125A, this device uses the photocoupling principle to turn on or off the relay module. SSR like D2425 are faster, create no noise, and have a longer lifespan as compared to an electromagnetic relay.

D2425 Pinout Diagram


D2425 Pinout Configuration 

Pin Number

Pin Name

Pin Function



Input AC and



Output AC



Trigger Signal input



Trigger Signal Input


Features and Specifications 

This section mentions some of the features and specifications of the D2425 Solid State Relay Module

  • Ratings from 10A to 125A @ 24-280 VAC
  • SCR output for heavy industrial loads
  • Zero voltage or instantaneous turn-on outputs
  • UL/CSA Approved, CE Compliant to EN60950-1
  • Improved SEMS screw and washer
  • Redesigned housing with anti-rotation barrier
  • AC or DC control
  • Direct bond copper substrate
  • EMC compliant to Level 3
  • Direct power lead-frame
  • Epoxy free design



RSPRO25 A, LH1500AT, A03B-1, G3MB-202P


Note: More technical information can be found in the D2425 Datasheet linked at the bottom of this page.


Working of D2425 Solid State Relay

Fundamentally speaking a solid-state relay works differently than an electromechanical relay. The SSR relays are made up of semiconductors and not mechanical parts and work by isolating a low-voltage circuit from a higher voltage circuit with the help of optocouplers. As per the basic working of an optocoupler, whenever the control input is given to the SSR relay, the internal LED lights up and produces a light signal which is received by a photosensitive semiconductor which then converts light energy into electrical energy and switches the circuit. These kinds of relays operate at high speed and have low power consumption. The block diagram of the D2425 relay is shown below.

D2425 Circuit Diagram



Here are some of the applications of the D2425 Solid State Relay

  1. Used for controlling multiple circuits
  2. Isolating low voltage from high voltages
  3. Automatic changeovers
  4. Electrical appliances ON/OFF applications


2D Model and Dimensions

Below is the 2D model and dimensions of the D2425 Solid State Relay along with its dimensions in millimeters. The following details can be used to design custom footprints and be used while designing PCB or CAD modeling.

D2425 Relay Dimensions

Component Datasheet

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