---
product_id: 418299231
title: "Alinan 2pcs SSR-40DD Solid State Relay DC to DC Input 3-32VDC Output 5-200VDC Single Phase Solid State Relay"
brand: "alinan"
price: "₨898"
currency: SCR
in_stock: true
reviews_count: 5
category: "Alinan"
url: https://www.desertcart.sc/products/418299231-alinan-2pcs-ssr-40dd-solid-state-relay-dc-to-dc
store_origin: SC
region: Seychelles
---

# 40A rated current Anti-rust high toughness screws High temp resistance up to 70°C Alinan 2pcs SSR-40DD Solid State Relay DC to DC Input 3-32VDC Output 5-200VDC Single Phase Solid State Relay

**Brand:** alinan
**Price:** ₨898
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up with precision and durability — don’t let your projects settle for less!

## Quick Answers

- **What is this?** Alinan 2pcs SSR-40DD Solid State Relay DC to DC Input 3-32VDC Output 5-200VDC Single Phase Solid State Relay by alinan
- **How much does it cost?** ₨898 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/418299231-alinan-2pcs-ssr-40dd-solid-state-relay-dc-to-dc)

## Best For

- alinan enthusiasts

## Why This Product

- Trusted alinan brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Durable, rust-resistant screws and rugged high-temp shell for long-term industrial-grade performance.
- • **Pro-Level Safety Tip:** Supports up to 40A load current; add a heatsink and thermal grease for heavy-duty, worry-free use.
- • **Efficient Heat Management:** Special copper plating maximizes heat dissipation, keeping your system cool and stable.
- • **Rapid Switching Precision:** Optocoupler core ensures lightning-fast, reliable switching under demanding loads.
- • **Wide Voltage Compatibility:** Operates seamlessly from 3-32V DC input to 5-200V DC output, fitting diverse control setups.

## Overview

The Alinan SSR-40DD is a solid state relay designed for DC to DC control, rated at 40A with a control voltage range of 3-32V and load voltage up to 200V. Featuring a high-speed optocoupler core, anti-rust screws, and a heat-resistant rugged case with special copper plating for superior heat dissipation, it’s engineered for reliable, long-lasting industrial applications. Ideal for professionals who demand efficient switching and robust build quality, with recommended heatsink use for currents above 10A.

## Description

Specification: Product Name: SSR-40DD Solid State Relay Control Current: 3-35MA Control Voltage: 3-32VDC Load Voltage: 5-200VDC Rated Current: 40A On-state Buck: ≤1.6V On-off Time: ≤10MS Ambient Temperature: -30°C ~ +70°C Product Weight: 0.1KG

Review: Mis informed delivery - It was good except the customer split my order. I needed 4 next day , which they advised but only 2 shipped next day and the other 2 followed a day later. Cost me a second trip by the electrician
Review: SCAM, do not buy. - I bought the 100A version. Definitely not 100A. I installed it on a large piece of aluminum and added a high speed fan. I needed this relay to power only 50-60A so it was pretty much at 60% of its rated power and within 3 minutes it started smoking really bad and the sticker came off from excessive heat. I remember buying elsewhere a 25A version and it had a 16A mosfet inside. The 40A version also had a 25A mosfet . I also bought a 60A version elsewhere and it only had the sticker changed and, guess what, a 25A mosfet. I didn't disassemble this relay because some cunning Chinese soaked it in black epoxy, but judging from my experience (and the thin legs) it's also going to be a 25A mosfet inside, overpowered 4 times. A good solid state relay of 100A should have around 4-6 mosfets inside. That way they are efficient and do not overheat too much. This relay had only one small mosfet and as I was passing 60A through it, I was probably burning another 20A as heat. Piece of garbage. Even in one of the photos they tell you to put a heatsink at 10% of its rating, this is a freaking joke and a scam.

## Features

- 【Optocoupler】: Core components of solid state relay quick switch speed, withstand voltage high.
- 【High Strength Screw】: High toughness anti rust screw material, not easy to break sliding wire. The column is made of red copper do.
- 【Rugged Case】: Excellent high temperature resistance is adopted for the shell. Burning material, bright luster, durable.
- 【Special Plating】: High purity copper base plate obvious heat dissipation effect, long time. It is not easy to heat when used between rooms.
- 【Note】: The solid-state relay generates a lot of heat. When the load current is greater than 10A, it needs to be used with a radiator. Apply thermal grease between the solid-state relay base plate and the radiator, and the fan is forced to cool if it is above 60A.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09P8B97ZN |
| Best Sellers Rank | #244,725 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #141 in Solid State Relays |
| Brand | Alinan |
| Brand Name | Alinan |
| Coil Voltage | 200 Volts |
| Connector Type | Others |
| Contact Current Rating | 40 Amps |
| Contact Material | Others |
| Contact Type | Others |
| Current Rating | 1 Amps |
| Customer Reviews | 4.0 out of 5 stars 20 Reviews |
| Included Components | others |
| Item Height | 0.75 millimeters |
| Item Weight | 95 Grams |
| Manufacturer | Alinan |
| Maximum Switching Current | 10 Amps |
| Maximum Switching Voltage | 200 Volts |
| Minimum Switching Voltage | 3 Volts |
| Mounting Type | others |
| Number of Terminals | 3 |
| Operation Mode | Automatic |
| Specification Met | Others |
| UPC | 701715497870 |
| Upper Temperature Rating | 70 Degrees Celsius |
| Wattage | 64 watts |

## Product Details

- **Connector Type:** Others
- **Contact Material:** Others
- **Contact Type:** Others
- **Current Rating:** 1 Amps
- **Mounting Type:** others

## Images

![Alinan 2pcs SSR-40DD Solid State Relay DC to DC Input 3-32VDC Output 5-200VDC Single Phase Solid State Relay - Image 1](https://m.media-amazon.com/images/I/71g7DlipeHL.jpg)

## Questions & Answers

**Q: 1. Normally open switch? or normally closed switch?
2. input current required to engage the switch? I know the load side handles 40A.**
A: Solid State Relay AC to AC Input 80-250VAC Output 24-380VAC

Relay is normally open.  Supply 80-250VAC on the input side allowing the output side to close handling 24-380VAC.

## Customer Reviews

### ⭐⭐⭐⭐ Mis informed delivery
*by B***R on August 6, 2025*

It was good except the customer split my order. I needed 4 next day , which they advised but only 2 shipped next day and the other 2 followed a day later. Cost me a second trip by the electrician

### ⭐ SCAM, do not buy.
*by M***K on April 29, 2025*

I bought the 100A version. Definitely not 100A. I installed it on a large piece of aluminum and added a high speed fan. I needed this relay to power only 50-60A so it was pretty much at 60% of its rated power and within 3 minutes it started smoking really bad and the sticker came off from excessive heat. I remember buying elsewhere a 25A version and it had a 16A mosfet inside. The 40A version also had a 25A mosfet . I also bought a 60A version elsewhere and it only had the sticker changed and, guess what, a 25A mosfet. I didn't disassemble this relay because some cunning Chinese soaked it in black epoxy, but judging from my experience (and the thin legs) it's also going to be a 25A mosfet inside, overpowered 4 times. A good solid state relay of 100A should have around 4-6 mosfets inside. That way they are efficient and do not overheat too much. This relay had only one small mosfet and as I was passing 60A through it, I was probably burning another 20A as heat. Piece of garbage. Even in one of the photos they tell you to put a heatsink at 10% of its rating, this is a freaking joke and a scam.

### ⭐⭐⭐⭐ Decent solid state relay
*by M***. on April 3, 2024*

Works good but should come with terminal cover

## Frequently Bought Together

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-03-20*