# Peltier Thermoelectric Module TEC1-12703, 40mm, 12V

> Peltier Thermoelectric Module TEC1-12703, dimensions 40x40x3.6mm, 12V DC power supply. Nominal current 3A (description also mentions 4.3-4.6A), cooling power Qcmax 43W under ideal test conditions. It works based on the temperature difference between its two sides, suitable for electrically controlled cooling/heating or current generation via temperature difference. A heatsink and thermal paste are needed for optimal operation.

- Page: https://sigmanortec.ro/en/peltier-thermoelectric-module-tec1-12703-40mm-12v
- Price: 33.58 RON
- Availability: In stock; 1-2 zile
- Reference: 9273 · EAN: 5942503761284
- Category: Mechatronics and IoT > Ventilator and Radiator > Peltier Elements
- Specifications: Nominal Current: 3 A; Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.022 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 05:45 (Europe/Bucharest)

## Description

Thermoelectric Peltier module for electrically controlled cooling or heating, ideal for DIY projects, electronics and industrial applications. Compact size 40x40x3.6 mm, 12V DC power supply, 4.3-4.6A current, cooling capacity up to 43W in optimal conditions. It works based on the temperature difference between the two sides, providing fast response and precise control.
The Peltier cell is a thermoelectric device composed of several junctions with a Peltier effect in series. Together with the Seebeck effect devices, it is an application of the so-called "thermoelectric" systems. Its name comes from Jean Charles Athanase Peltier.
With this module, cooling or heating can be achieved only with the help of electricity by creating a temperature difference between the two sides of the board. The more efficient the heat dissipation on one side is, the more the module will cool on the opposite side.
The peltier can also be used to generate current through the simple temperature difference between the two faces.
Specifications:
Dimensions mm: 40 x 40 x 3.6mm
Model: TEC1-12703
Supply voltage: 12VDC
Supply current: 4.3 - 4.6A
Cooling power: Qcmax 43
* The relative power specifications of the mod reflect its testing under ideal test conditions. The module behaves like a resistor. Its heating during operation leads to an increase in resistance, implicitly a decrease in power. Use quality radiator and thermal paste for optimal results.
Important:
The presence of a radiator with adequate cooling on the heated side is essential for correct operation.