---
product_id: 226556587
title: "- irhapsody 4-pin 40/30AMP 12V DC Waterproof Relay with Heavy-Duty Wires, SPST Automotive Relay, Pack of 1"
brand: "irhapsody"
price: "₨7923"
currency: LKR
in_stock: true
reviews_count: 10
category: "I Rhapsody"
url: https://www.desertcart.lk/products/226556587-irhapsody-4-pin-40-30amp-12v-dc-waterproof-relay-heavy
store_origin: LK
region: Sri Lanka
---

# 40A max switching current Waterproof & dustproof design Thick 12-gauge heavy-duty wires - irhapsody 4-pin 40/30AMP 12V DC Waterproof Relay with Heavy-Duty Wires, SPST Automotive Relay, Pack of 1

**Brand:** irhapsody
**Price:** ₨7923
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay switched on with the ultimate waterproof relay power boost!

## Quick Answers

- **What is this?** - irhapsody 4-pin 40/30AMP 12V DC Waterproof Relay with Heavy-Duty Wires, SPST Automotive Relay, Pack of 1 by irhapsody
- **How much does it cost?** ₨7923 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/226556587-irhapsody-4-pin-40-30amp-12v-dc-waterproof-relay-heavy)

## Best For

- irhapsody enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Rated for 100,000 electrical operations and 10 million mechanical cycles
- • **Precision Engineering:** Fast 7ms operate and 5ms release times for lightning-quick response
- • **Plug & Play Simplicity:** Easy socket mount with clear wiring diagram for hassle-free installation
- • **Powerhouse Performance:** Handles up to 40 amps for reliable heavy-duty automotive use
- • **Weather-Resistant Durability:** Waterproof and dustproof casing keeps your relay safe in tough environments

## Overview

The iRhapsody 4-pin 12V DC waterproof relay delivers robust 40A switching capacity with heavy-duty 12-gauge wires, engineered for fast response and long-lasting reliability. Its weatherproof design ensures dependable performance in harsh automotive environments, making it a top choice for professionals demanding durability and precision.

## Description

Nominal Coil Voltage: 12 V DC Coil Power: 1.8 W Coil Resistance: 80Ω¸ Must Operate Voltage: 6~8 V DC Must Release Voltage: 0.6~3.6 V DC Maximum Applied Voltage: 15.6 V DCContact Ratings: NO 40A 14V DC Contact Resistance: 100mMAX (at6VDC 1A) Max Switching Current: 40A Max Switching Power: 560 W Life Expectancy Electrical: 100,000 Operations (at30 Operations/minute) Life Expectancy Machanical: 10,000,000 Operations Temperature Range: -30 ~ +80 degrees Celsius Vibration Resistance: 10~55Hz, 1.5mm Shock Resistance: Operations Extremes: 10g. Damage Limits: 100g Hunidity: 40% ~ 85% Insulation Resistance: 100mΩ¸ Min at500VDC Dielectric Strength Between Open Contacts: 500VAC (for one minute/sec) Between Contactw and coil: 750AC (for one minute/sec) Operate Tice: 7ms Release Tice: 5ms Package Content: 1 x 12VDC 4 PIN waterproof relay kit

Review: Waterproofed great - Thats good good socket, is waterproofed and long lasting. The wire size is awg16, good shielded. Connect to positive for s big click. Works amazing
Review: It works - Its a relay and works fine

## Features

- Never go beyond its capabilities. Try to stay 10 to 15% below what the rate is for
- 12-volt 4-prong relay. Excellent water-repellent and dustproof ability, but not using it in water
- For the people whose relays are burning, please make sure you are making tight connections (especially on the load wires), read the specs on the item description, and ensure that the operating environment meets the safety requirements of the relay
- Be careful when inserting the relay into the socket. If you force it, you will bend the female connectors
- Thick 12 gauge wire for the load terminals. Easy to install, make sure you follow the wiring diagram. Works for both positive and negative activation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08D8TSMFV |
| Best Sellers Rank | #3,766 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Accessory Power Relays |
| Brand | iRhapsody |
| Coil Resistance | 80 Ohms |
| Coil Voltage | 12 Volts |
| Connector Type | Wired |
| Contact Current Rating | 30 Amps |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Current Rating | 40 Amps |
| Date First Available | July 20, 2020 |
| Item Weight | 3.2 ounces |
| Item model number | Relay-MFV |
| Manufacturer | IRHAPSODY |
| Maximum Switching Current | 40 Amps |
| Minimum Switching Voltage | 6 Volts |
| Mounting Type | Socket Mount |
| Operation Mode | Automatic |
| Package Dimensions | 9.25 x 2.36 x 1.42 inches |
| Wattage | 1.8 watts |

## Product Details

- **Connector Type:** Wired
- **Contact Material:** Copper
- **Contact Type:** Normally Open
- **Current Rating:** 40 Amps
- **Mounting Type:** Socket Mount

## Images

![- irhapsody 4-pin 40/30AMP 12V DC Waterproof Relay with Heavy-Duty Wires, SPST Automotive Relay, Pack of 1 - Image 1](https://m.media-amazon.com/images/I/61Rqrap1mnL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Are these made in the USA?**
A: I never checked. But, I doubt it.

**Q: In a car, is the dc ground the same as the dc negative?**
A: DC ground and DC negative, chassis ground,  are the same thing, a direct connection to the battery negative terminal. The metal body of the car, frame, sheet metal, engine block etc are all connected together and connected to the negative battery cable .

**Q: Need this in a 24v coil version with a flyback diode or resistor preinstalled.  link?**
A: Hi, This product is for your reference: https://www.amazon.com/dp/B07L2H67BN?ref=myi_title_dp

**Q: Are these suitable for continuous duty?**
A: I use mine for auto radiator fan control, the fan runs continuously in traffic during the summer. No issues.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Waterproofed great
*by U***E on December 11, 2025*

Thats good good socket, is waterproofed and long lasting. The wire size is awg16, good shielded. Connect to positive for s big click. Works amazing

### ⭐⭐⭐⭐⭐ It works
*by J***N on February 2, 2026*

Its a relay and works fine

### ⭐⭐⭐⭐⭐ Turned My Pickups Horn into the Sound of God’s Wrath
*by P***O on August 12, 2025*

Bought this relay to wire my air horn to my regular horn. Now, every gentle “beep” has been replaced with THE APOCALYPSE IS HERE. Installation? Stupid easy—clear instructions, beefy 12-gauge leads, and built like it could survive a nuclear blast. Waterproof too, so it works perfectly while I’m driving through a storm and scaring the soul out of unsuspecting pedestrians. Yeah, it’s a little bigger than I thought—but that’s fine. It’s the beating heart of my chaos machine. Highly recommend… unless you’re the guy whose coffee they just launched across three lanes of traffic. Great value!

## Frequently Bought Together

- irhapsody 4-PIN 40/30AMP 12V DC Waterproof Relay with Harness - Heavy Duty 12 AWG Tinned Copper Wires, 1 Pack SPST Automotive Relay
- MCIGICM 12 AWG Inline Fuse Holder with 30A ATC/ATO Blade Fuse, 5 Pack
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**Shop now:** [https://www.desertcart.lk/products/226556587-irhapsody-4-pin-40-30amp-12v-dc-waterproof-relay-heavy](https://www.desertcart.lk/products/226556587-irhapsody-4-pin-40-30amp-12v-dc-waterproof-relay-heavy)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-28*