# Solid State Relay SSR-40DA, 40A

> Solid state relay SSR-40DA, 40A, with TRIAC output and zero crossing switching, optical isolation between input and output, status LED. Control signal 3-32VDC (3-25mA), load voltage 24-380VAC, switching time

- Page: https://sigmanortec.ro/en/solid-state-relay-ssr-40da-40a
- Price: 30.56 RON
- Availability: In stock; 1-2 zile
- Reference: 9240 · EAN: 5949281969567
- Category: Electronic components > Relays > Solid State Relays
- Specifications: Nominal Current: 40 A; Maximum Output Current: 40; Output Type Voltage: Closed-Open Contact; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: AC; Model: SSR-40DA
- Package (shipping data): 0.089 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 03:25 (Europe/Bucharest)

## Description

40A solid state relay for fast and silent control of AC loads, ideal for automation and industrial control. Contactless switching, no sparks, zero crossing TRIAC output for reduced wear, optical isolation between input and output and status LED for easy verification. Accepts 3-32VDC control signal and load voltages up to 380VAC.
Solid state relay (SSR) of 40A power, differs from the classic relay by switching without contact, which makes it possible to actuate it without sparks and noise, with a fast switching speed.
Benefits include TRIAC output, electromagnetic isolation, fast actuation, moisture resistance, zero closing current and optical isolation between the input and output circuits.
Important: Check the temperature of the relay. With loads greater than 4A, a radiator is recommended.
Specifications:
Model: SSR-40DA
Signal voltage: 3-32VDC
Control signal current: 3 - 25mA
ON state current loss: <2mA
Supported voltage: 24 - 380VAC
Maximum load: 40A
Switching time: <10ms
Dielectric power: 2500VAC
Insulation resistance: 500M / 500VDC
Operating temperature: -30 - 75 degrees C
Installation: screws
ON status: LED