---
product_id: 6360422
title: "Extech 380400 Resistance Decade Box"
brand: "extech"
price: "$U13324"
currency: UYU
in_stock: true
reviews_count: 8
url: https://www.desertcart.uy/products/6360422-extech-380400-resistance-decade-box
store_origin: UY
region: Uruguay
---

# 0-30V Output 0-3A Output Overload Protection Extech 380400 Resistance Decade Box

**Brand:** extech
**Price:** $U13324
**Availability:** ✅ In Stock

## Summary

> 🔧 Unleash Your Inner Engineer with the Extech380400!

## Quick Answers

- **What is this?** Extech 380400 Resistance Decade Box by extech
- **How much does it cost?** $U13324 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/6360422-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

- • **Safety First:** Built-in overload and short circuit protection for peace of mind.
- • **Easy Connectivity:** Binding posts and snap terminals for hassle-free connections.
- • **Global Compatibility:** Operates on 110/220VAC, perfect for any workspace.
- • **Power Up Your Projects:** Adjustable voltage and current outputs for versatile applications.
- • **Precision at Your Fingertips:** Digital displays for real-time monitoring of voltage and current.

## Overview

The Extech380400 Resistance Decade Box is a versatile power supply solution featuring adjustable outputs of 0 to 30V and 0 to 3A, along with fixed outputs of 12V and 5V. It includes digital displays for precise monitoring, robust safety features, and compatibility with global voltage standards, making it an essential tool for professionals and hobbyists alike.

## Description

Product 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.                  From the Manufacturer               Resistance decade box for product design or calibration checks. It features 7 decades of substitution from 1 to 11,111,110? in 1? increments. 1% accuracy. 3 binding posts permit isolated substitutions and grounding the case separately.

## 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)

## 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

### ⭐⭐⭐⭐⭐ Good Resistor Decade Box,  it will look good on your bench/lab.
*by A***R on March 21, 2019*

Solid resistor decade box, feels really nice on my hands, no a metal box but does not feel flimsy. Switches feel very solid, and all the switches external metal case are connected to ground. The yellow box looks nice on the bench. Does not take too much space.Some of these resistor decade boxes cost 100’s or 1000’s of Dollars, that’s crazy. Unless you are designing the next iPhone replacement, this is all you need. Resistor are 1%.The front panel cuts out are no precise. Look the 1MΩ switch, as a result the switch feels kind of rough when set to “IN” or “OUT.” This is the worse switch on the box I got. Some other switches are like that, but they don’t feel too bad.Overall, good box. I like it. I think 5 stars are well deserved. Price is good. Made in Taiwan. Where else, right?

### ⭐⭐⭐⭐⭐ This tool is invaluable for circuit testing for a professional tech.
*by W***E on January 28, 2022*

A lot of time can be saved by substituting sensor resistance values to check circuit integrity. This tool has not only saved me time but has helped me diagnose some difficult automotive trouble codes by inserting known good solenoid etc values in circuits.

### ⭐⭐⭐⭐⭐ Works great.
*by S***K on September 26, 2022*

Works well I have used to it for testing of potentiometers and variable resisor circuits

## 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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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-22*