---
product_id: 15671160
title: "SSR Solid State Relay SSR 40DA for PID Thermostat Temperature Controller"
price: "109 zł"
currency: PLN
in_stock: true
reviews_count: 8
url: https://www.desertcart.pl/products/15671160-ssr-solid-state-relay-ssr-40da-for-pid-thermostat-temperature
store_origin: PL
region: Poland
---

# 40A max current capacity DC input range 3-32V Supports AC 24-380V output SSR Solid State Relay SSR 40DA for PID Thermostat Temperature Controller

**Price:** 109 zł
**Availability:** ✅ In Stock

## Summary

> ⚡ Control the heat, own the moment.

## Quick Answers

- **What is this?** SSR Solid State Relay SSR 40DA for PID Thermostat Temperature Controller
- **How much does it cost?** 109 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/15671160-ssr-solid-state-relay-ssr-40da-for-pid-thermostat-temperature)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Pros:** Highly rated and reliable for precision temperature control in demanding environments.
- • **Cool Under Pressure:** Designed for heat dissipation—pair with a heatsink to keep performance peak.
- • **Efficient DC Input Range:** Operates smoothly on 3-32V DC input, perfect for PID thermostat setups.
- • **Robust 40A Load Handling:** Power through your projects with industrial-grade current capacity.
- • **Wide Voltage Compatibility:** Seamlessly integrates with AC 24-380V systems for versatile control.

## Overview

The Inkbird SSR-40DA is a solid state relay engineered for precise temperature control with a 40A max current rating and wide AC output voltage range (24-380V). It accepts a DC input from 3 to 32V, making it ideal for PID thermostat applications. Built with durable aluminum and designed for efficient heat management (heatsink recommended), this relay delivers reliable switching performance for industrial and home automation projects.

## Description

desertcart.com: Inkbird SSR Solid State Relay SSR 40DA for PID Thermostat Temperature Controller : Industrial & Scientific

Review: Use a heatsink! - I think all the people melting their SSRs didn't get the memo about using a heatsink, although it's written in the product description. I mounted mine to an old CPU heatsink with fan, and after passing a continuous 16A at 120VAC for one hour the SSR was not even warm to the touch. The relay also responds as expected to a 12VDC PWM signal, switching on and off my 120VAC load as expected. I don’t know if this relay has counterfeit TRIACs in it, I don’t know if it could handle anywhere near a 40A load, but if you’re using a cheap SSR like this you should probably plan to run it at a fraction of its rated current with an oversized heat exchanger. Luckily, 16A is the max current of most home circuits in the US, so this should be adequate for most uses, unless you start getting funky with your wiring. Just make sure you’ve got a way to remove the heat and this thing should do you well.
Review: GREAT PRODUCT - This works perfect for my smoker. Thank you so much

## Features

- Input : DC 3 - 32V
- Output : AC 24 - 380V
- Solid State Relay
- Type : SSR - 40DA
- 1 x Solid State Relay

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00HV974KC |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #50,736 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Solid State Relays |
| Color | Black Heat Sink |
| Customer Reviews | 4.4 4.4 out of 5 stars (303) |
| Date First Available | January 4, 2011 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 4.8 ounces |
| Item model number | ESSR-40DAC |
| Manufacturer | Lerway Tech |
| Material | Aluminum |
| Package Dimensions | 2.1 x 2.1 x 0.9 inches |
| Part Number | ITC-100-LW |
| Size | SSR-40DA 1 Pack |
| Voltage | 24 Volts, 3 Volts |
| Wattage | 3500 watts |

## Images

![SSR Solid State Relay SSR 40DA for PID Thermostat Temperature Controller - Image 1](https://m.media-amazon.com/images/I/61hEqqyeFIL.jpg)

## Questions & Answers

**Q: What is the minimum volts ac needed to close the relay?  i need something that will close when 1 to 3 vac are applied.**
A: The minimum voltage is 3V DC.  It is not designed for an AC input voltage of any type.

**Q: What gauge are the terminals?**
A: The terminals are a screw down clamps with a 3.5mm max opening.  The screw is 4mm shaft with a 7mm + phillips hex head.

**Q: What is the minimum dC current required**
A: Not sure, but it’s in milliamperes.  It’s more voltage dependent than current .

**Q: does it come with a heat sink?**
A: This is a separate solid state relay.
If you need a heat sink, you can click on the following link：https://www.amazon.com/dp/B01MCWO35P?ref=myi_title_dp

## Customer Reviews

### ⭐⭐⭐⭐⭐ Use a heatsink!
*by H***D on June 5, 2020*

I think all the people melting their SSRs didn't get the memo about using a heatsink, although it's written in the product description. I mounted mine to an old CPU heatsink with fan, and after passing a continuous 16A at 120VAC for one hour the SSR was not even warm to the touch. The relay also responds as expected to a 12VDC PWM signal, switching on and off my 120VAC load as expected. I don’t know if this relay has counterfeit TRIACs in it, I don’t know if it could handle anywhere near a 40A load, but if you’re using a cheap SSR like this you should probably plan to run it at a fraction of its rated current with an oversized heat exchanger. Luckily, 16A is the max current of most home circuits in the US, so this should be adequate for most uses, unless you start getting funky with your wiring. Just make sure you’ve got a way to remove the heat and this thing should do you well.

### ⭐⭐⭐⭐⭐ GREAT PRODUCT
*by T***O on March 14, 2024*

This works perfect for my smoker. Thank you so much

### ⭐⭐⭐⭐⭐ It works
*by J***R on September 1, 2023*

I used this in building a controller for an electronic brew station. It works, followed the wiring schematic online, using a PID controller and a 120 to 240v capacitor to turn the power on and off to the 220v heating element.

## Frequently Bought Together

- Inkbird SSR Solid State Relay SSR 40DA for PID Thermostat Temperature Controller
- Inkbird PID Temperature Controller Kit, High Voltage 100ACV to 240ACV, Comes with SSR 40DA Solid State Relay, K Type Thermocouple, and White Heat Sink
- Inkbird Solid State Relay 40DA DC SSR Black Heat Sink for PID Thermostat Temperature Controller

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-17*