---
product_id: 352537911
title: "BolsenTEC1-12704 12703 12706 12740 TES1-12701 TEC1-12705FX TEC1-19912 TEC Thermoelectric Cooler Peltier of semiconductor Refrigeration 30X30/40X40 (5PC TEC1 12704 40X40)"
brand: "bolsen"
price: "€ 37.01"
currency: EUR
in_stock: true
url: https://www.desertcart.fr/products/352537911-bolsentec1-12704-12703-12706-12740-tes1-12701-tec1-12705fx-tec1
store_origin: FR
region: France
---

# Power-efficient Instant heating Rapid cooling BolsenTEC1-12704 12703 12706 12740 TES1-12701 TEC1-12705FX TEC1-19912 TEC Thermoelectric Cooler Peltier of semiconductor Refrigeration 30X30/40X40 (5PC TEC1 12704 40X40)

**Brand:** bolsen
**Price:** € 37.01
**Availability:** ✅ In Stock

## Summary

> ❄️ Cool down or heat up—your choice!

## Quick Answers

- **What is this?** BolsenTEC1-12704 12703 12706 12740 TES1-12701 TEC1-12705FX TEC1-19912 TEC Thermoelectric Cooler Peltier of semiconductor Refrigeration 30X30/40X40 (5PC TEC1 12704 40X40) by bolsen
- **How much does it cost?** € 37.01 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/352537911-bolsentec1-12704-12703-12706-12740-tes1-12701-tec1-12705fx-tec1)

## Best For

- bolsen enthusiasts

## Why This Product

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

## Key Features

- • **Compact Design:** Slim dimensions of 40x40mm or 30x30mm fit seamlessly into any setup.
- • **Easy Installation:** Comes with 300mm lead length for hassle-free connections.
- • **Optimal Performance:** Must be paired with a heat sink for maximum efficiency and longevity.
- • **Versatile Applications:** Perfect for CPU coolers, alternate power sources, and DIY projects.
- • **Chill or Heat in a Flash:** Get ice cold in minutes or heat to boiling with a simple polarity switch!

## Overview

The Bolsen TEC1-12704 Thermoelectric Cooler is a versatile semiconductor refrigeration solution, available in a pack of five. With dimensions of 30x30mm and 40x40mm, these Peltier devices can rapidly cool or heat by simply reversing polarity, making them ideal for a variety of applications, from CPU cooling to innovative DIY projects. Each unit requires a heat sink for optimal performance.

## Description

BolsenTEC1-12704 12703 12706 12740 TES1-12701 TEC1-12705FX TEC1-19912 TEC Thermoelectric Cooler Peltier of semiconductor Refrigeration 30X30/40X40 (5PC TEC1 12704 40X40)

## Features

- TEC1-12704 TEC Thermoelectric Cooler refrigeration 30X30/40X40 Thermoelectric Cooler Peltier of semiconductor refrigeration,5PCS TEC1-12704 (40*40)
- Get ice cold in minutes or heat to boiling by simply reversing the polarity, used for numerous applications from CPU coolers to alternate power sources, or even for your own
- Overall dimensions: 40*40*4.0mm/30*30*3.0MM element TEC1-12704 ,5PCS TEC1-12704 (40*40)
- Wire specification: lead length 300 + 5mm RV standard wire single head 5mm tin plating
- These devices must be used in conjunction with a heat sink to avoid burned

## Product Details

- **Product dimensions:** 40L x 4W x 40H millimeters
- **Brand:** Bolsen
- **Voltage:** 12 Volts
- **Wattage:** 60 watts
- **Cooling method:** Peltier

## Images

![BolsenTEC1-12704 12703 12706 12740 TES1-12701 TEC1-12705FX TEC1-19912 TEC Thermoelectric Cooler Peltier of semiconductor Refrigeration 30X30/40X40 (5PC TEC1 12704 40X40) - Image 1](https://m.media-amazon.com/images/I/51Seh8cMPVL.jpg)
![BolsenTEC1-12704 12703 12706 12740 TES1-12701 TEC1-12705FX TEC1-19912 TEC Thermoelectric Cooler Peltier of semiconductor Refrigeration 30X30/40X40 (5PC TEC1 12704 40X40) - Image 2](https://m.media-amazon.com/images/I/41gqMI4XglL.jpg)

## Available Options

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

## Questions & Answers

**Q: My mini-frig uses one 12704 40 mm x 40 mm Peltier.  Can a 12705 or 12706 size be used to replace it?  I do not want to buy five 12704's.**
A: Most likely not the Peltier, having fixed a couple of (mini coolers, wine cellars and other thermal devices), the problem happens from Electrolytic capacitors that fail with age or are substandard.
To check if the Peltier is bad, remove it from the circuit board (it may be connected to a heat sink with thermal paste and screws) test it out of circuit using AA battery.  When you connect the battery make sure you use the correct polarity, one side of the Peltier will be cold and reverse side will be hot which means its good, you don't have to reach reverse side full hot temperature.
So if it's good, the next step if you don't have a schematic take a closeup picture of the circuit board, or better take notes. Write down the Electrolytic capacitors (position on the circuit board, capacitor values, polarity, physical size, swollen, leaking). 
Best way to check the capacitors is to unsolder them from the board and use a capacitor checker to check their values (voltage, ESD, Ohms) you will get accurate readings without any other components on the circuit board returning misleading values. 
I replaced all the Electrolytic capacitors on everything I repaired, and all devices work like brand new, going on four years with no failures. 
If you opt to replace all the Electrolytic capacitors, buy quality (Nichicon, Panasonic, Leylon) to name a few. Hope this information helps.

## Frequently Bought Together

- Bolsen TEC1-12704 12703 12706 12740 TES1-12701 TEC1-12705FX TEC1-19912 TEC Thermoelectric Cooler Peltier of semiconductor Refrigeration 30X30/40X40 (5PC TEC1 12704 40X40)
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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-01-28*