---
product_id: 375776044
title: "Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2)"
brand: "gebildet"
price: "¥5491"
currency: JPY
in_stock: true
reviews_count: 1
url: https://www.desertcart.jp/products/375776044-gebildet-jd1912-car-relay-harness-12v-40a-4-pin-spst
store_origin: JP
region: Japan
---

# 40A high load capacity 12V DC compatible 15ms fast operate time Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2)

**Brand:** gebildet
**Price:** ¥5491
**Availability:** ✅ In Stock

## Summary

> ⚡ Drive with confidence—power, protection, and precision in every relay!

## Quick Answers

- **What is this?** Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2) by gebildet
- **How much does it cost?** ¥5491 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/375776044-gebildet-jd1912-car-relay-harness-12v-40a-4-pin-spst)

## Best For

- gebildet enthusiasts

## Why This Product

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

## Key Features

- • **Quick Response Relay:** Fast 15ms operate and 10ms release times for instant switching.
- • **Durability That Lasts:** Engineered for 100,000 electrical cycles and 10 million mechanical operations.
- • **Powerhouse Performance:** Handles up to 40A load for robust automotive power needs.
- • **Seamless Compatibility:** Works flawlessly with all 12V DC vehicles and devices.
- • **Built-in Voltage Protection:** Integrated diode safeguards your electronics from voltage spikes.

## Overview

The Gebildet JD1912 Car Relay Harness is a 12V 40A 4-pin SPST relay socket set designed for automotive, truck, van, motorcycle, and boat applications. Featuring an integrated diode for voltage spike protection, silver alloy contacts with low resistance, and a robust lifespan of up to 100,000 electrical operations, it ensures reliable, fast switching with 15ms operate time. Compatible with all 12V DC systems, this pack of two harnesses offers durable, high-performance electrical switching solutions for professional-grade vehicle wiring.

## Description

Interchangeable/Compatible with:  All automobiles and devices equipped with a 12 Volt DC power source.   Relay technical specification: Relay load: 40A/12VDC Contact Resistance: ≤ 100MΩ Contact Material: Ag Alloy Life Expectancy Electrical: 100,000 Operations (at 30 Operations/min)  Life Expectancy Mechanical: 10,000,000 Operations Coil power:1.8W Operate Time: 15ms Release Time: 10ms Initial withstand voltage of Contact and Contact: 1000VAC/1min Initial withstand voltage of Contact and Coil: 1500VAC/1min Insulation Resistance: 100MΩ/( 500VDC)  Temperature Range: -55°C ~+70°C Humidity Range:35%-80% Atmospheric Pressure:86-106KPa   Gebildet Operation Goal:  Create value for our customers is our responsibility, quality products and sincere service is our eternal pursuit.  After Sale Service:  Customer satisfaction is our greatest pursuit, If you found our products don’t work or not so good quality as you think, Please contact us without hesitation. We can resend you a new item or 100% refund money as you like.   Feedback and Review warmly welcome: Your Feedback and Review are the motivation for us to provide best product and service, we really appreciate to hear the suggestion from you.

## Features

- Integrated Diode: Each relay includes a built-in diode that suppresses induced voltage during switching, safeguarding your electrical components from potential damage.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Gebildet |
| Item model number | E079 |
| Package Dimensions | 22.91 x 6.71 x 3.3 cm; 132 g |
| ASIN | B078T8CMF6 |

## Product Details

- **Connector type:** Spade
- **Contact material:** Silver Alloy
- **Contact type:** Normally Open
- **Current rating:** 40 Amps
- **Mounting type:** Socket Mount

## Images

![Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2) - Image 1](https://m.media-amazon.com/images/I/5120-sOHvbL.jpg)

## Available Options

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

## Questions & Answers

**Q: I received the jd2912 relays. what email address do i email?**
A: You can contact son of wil through Amazon.

**Q: so in the picture the top red wire that is 87 goes to the motor to turn it on but it shows in the picture red turns to black and it is ground?**
A: The red wire goes to the device that you want to turn on and the black to that Device

**Q: what gauge wire on battery terminals**
A: I used a 14 gauge wire to the battery

**Q: I have a positively grounded (+ ground) system.  The relay coil should still operate correct?**
A: If you are stating the chassis is battery plus, then it should work, but would need to cycle your negative signals to control coils. John Deere 60 tractors have a positive chassis methodology, so might need to investigate how they operate to verify implementation.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Recommended
*by A***I on 27 March 2025*

Good quality

## Frequently Bought Together

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-20*