---
product_id: 291448268
title: "Extech 380400 Resistance Decade Box"
brand: "extech"
price: "MX$6590"
currency: MXN
in_stock: true
reviews_count: 5
url: https://www.desertcart.mx/products/291448268-extech-380400-resistance-decade-box
store_origin: MX
region: Mexico
---

# 1Ω to 11MΩ Range 1Ω Increments 1% Accuracy Extech 380400 Resistance Decade Box

**Brand:** extech
**Price:** MX$6590
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate Your Testing Game with Precision!

## Quick Answers

- **What is this?** Extech 380400 Resistance Decade Box by extech
- **How much does it cost?** MX$6590 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/291448268-extech-380400-resistance-decade-box)

## Best For

- extech enthusiasts

## Why This Product

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

## Key Features

- • **Durable Build:** Crafted with robust plastic housing to withstand the rigors of daily use.
- • **Grounding Capability:** Optional separate grounding for enhanced safety and performance.
- • **User-Friendly Design:** Set values effortlessly in 1 ohm increments for precise measurements.
- • **Precision Engineering:** Achieve unparalleled accuracy with a 1% tolerance.
- • **Versatile Resistance Range:** Easily switch between 1 ohm to 11 Mohms for diverse applications.

## Overview

The Extech 380400 Resistance Decade Box is a high-performance tool designed for professionals, offering a resistance range from 1 ohm to 11 Mohms with 1 ohm increments. Its durable plastic housing ensures longevity, while the 1% accuracy guarantees reliable measurements. Ideal for engineers and technicians, this device is a must-have for precise electrical testing.

## Description

The Extech 380400 Resistance Decade Box is very popular for product design testing and calibration because it can be substituted into a circuit and function in the place of any component with a standard value easily. Alternatively, it can be used to identify the best value for circuit operation then read that value from the switches. Then, a resistor of the size indicated by the decade box switches can be put into the circuit.

## Features

- Adjustable 0 to 30V and 0 to 3A output plus fixed 12V and 5V outputs (0.5A continuous/1A surge)
- Digital displays of voltage and current output
- Binding posts for variable output and easy snap terminals for fixed outputs
- Overload and short circuit protected
- Operate on 110/220VAC (50/60Hz)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B00023RTZO |
| Best Sellers Rank | #105,831 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #37 in Power Current Equipment |
| Color Name | Yellow |
| Customer Reviews | 4.8 4.8 out of 5 stars (96) 4.8 out of 5 stars |
| Date First Available | 1 January 2024 |
| Item Model Number | 380400 |
| Item Weight | 310 g |
| Material Type | HAWA |
| Power Source | Corded-electric |
| Product Dimensions | 14.48 x 11.68 x 3.56 cm; 310 g |

## Images

![Extech 380400 Resistance Decade Box - Image 1](https://m.media-amazon.com/images/I/71LmMCvivjL.jpg)
![Extech 380400 Resistance Decade Box - Image 2](https://m.media-amazon.com/images/I/81rH2w2U2iL.jpg)
![Extech 380400 Resistance Decade Box - Image 3](https://m.media-amazon.com/images/I/815Ky81db-L.jpg)
![Extech 380400 Resistance Decade Box - Image 4](https://m.media-amazon.com/images/I/71aEN2OyR4L.jpg)
![Extech 380400 Resistance Decade Box - Image 5](https://m.media-amazon.com/images/I/81TFhrF5kIL.jpg)

## Available Options

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

## Questions & Answers

**Q: Maximum voltage rating ?**
A: I have only used this on 24VDC systems.

**Q: Does this item come with test leads?**
A: No, just the box. It uses standard banana test ends.

**Q: How would you set this to, say, 350 ohms? Or any value containing a digit greater than 4? Just don't?**
A: The values are cumulative, to get 350 Ohms you would switch the 300, 40, and 10 OHM down. To get a greater the 4 value you would just switch the needed values on.  This item has a range between 1 to 11,111,110 Ohms

**Q: Will this unit  provide a stable  signal on automotive circuits?**
A: This is a typical decade box that will provide the resistance you need for testing purposes. I have used it to simulate different devices in the testing of DC control systems.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excelente
*by  on Reviewed in Mexico 22 July 2021*

Excelente

### ⭐⭐⭐⭐⭐ Genial
*by  on Reviewed in Canada 3 December 2025*

je l'adore

### ⭐⭐⭐⭐⭐ Works Perfectly
*by  on Reviewed in the United States 14 October 2025*

Substituting variable resistance in an automotive circuit is a valuable diagnostic strategy. This box offers convenience and accuracy at half the price of the look-alike specialty tool.

## Frequently Bought Together

- Extech 380400 Resistance Decade Box
- Sumnacon Multimeter Banana Plug to Crocodile Alligator Clip Test Probe, 5PCS 4mm Stackable Colorful Silicone Banana Plug to Alligator Clip Test Probe Lead Wire Cable 1M
- GME CD-300 Capacitance Substitution Decade Box, 5 Decades Range, 100pF to 11.111 μF, Designed in The USA

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**Shop now:** [https://www.desertcart.mx/products/291448268-extech-380400-resistance-decade-box](https://www.desertcart.mx/products/291448268-extech-380400-resistance-decade-box)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-09-09*