TEC1 Peltier Thermoelectric Cooler Module – 40×40mm | 12V DC | Multiple Models

Upgrade your DIY cooling, temperature control, or electronics projects with this compact and efficient Peltier thermoelectric cooler module. Available in three models — TEC1-12705, TEC1-12706, and TEC1-12715 — these 40×40mm semiconductor cooling elements use the Peltier effect to transfer heat from one side to the other, enabling precise temperature regulation without moving parts or refrigerants. Ideal for makers, engineers, and hobbyists working on custom coolers, CPU cooling rigs, mini-fridges, laser diode cooling, and more. Made in Mainland China.

Choose Your Model

TEC1-12705

Dimensions: 40 × 40 × 3.8mm
Component Pairs: 127
Rated Voltage: DC 12V (Vmax: 15.5V)
Operating Current: Imax = 5A
Cooling Power (Qcmax): 45W
Max Temperature Difference: >61°C
Internal Resistance: 2.4–2.7Ω @ 23±1°C (1kHz AC test)
Operating Temp Range: -55°C to 83°C
Lead Wire: 100±5mm RV standard wire, 5mm tin-plated single end
Sealing: Standard 704 silicone rubber on all four sides
Storage: -40°C to 60°C; Foam box packaging

TEC1-12706

Dimensions: 40 × 40 × 3.75mm
Rated Voltage: 12V (Vmax: 15V, startup current: 5.8A)
Operating Current: Imax = 4.3–4.6A
Cooling Power (Qcmax): 60–72W
Max Temperature Difference: >59°C
Internal Resistance: 2.1–2.4Ω @ 23±1°C (1kHz AC test)
Operating Temp Range: -55°C to 83°C

TEC1-12715

Dimensions: 40 × 40 × 3.3mm
Maximum Voltage: 15.4V
Maximum Current: 15A
Cooling Capacity: 134W
Cooling Temperature Range: 65°C

Key Features

✅ Solid-state design – no refrigerant, no moving parts, silent operation
✅ Compact 40×40mm footprint – fits standard heatsinks and CPU coolers
✅ Reversible operation – swap polarity to switch between cooling and heating
✅ Wide operating temperature range – -55°C to 83°C
✅ Three power options – choose 5A (45W), 6A (60-72W), or 15A (134W) to match your project needs
✅ Silicone-sealed edges (TEC1-12705) for added durability and moisture resistance
✅ Simple 12V DC operation – easy to integrate with most power supplies

Common Applications

DIY mini refrigerators and beverage coolers
CPU and electronics thermal management
Laser diode and LED cooling
Temperature-controlled enclosures
Portable cooling pads and science experiments
Small-scale heating applications (reversed polarity)

Package Includes

1 × Peltier Thermoelectric Cooler Module (model of your choice)

Important Notes

Photos are for illustration only; please refer to the specifications above for exact dimensions.
Excessively high ambient temperatures will directly reduce cooling efficiency — always pair with an adequate heatsink and fan.
Allow ±1–2mm variance due to manual measurement.
Screen colors may vary slightly from the actual product.

Related Products You May Like

For more information on thermoelectric technology and energy efficiency in cooling systems, visit U.S. Department of Energy – Cooling.

Learn more: Thermoelectric generator

Frequently Asked Questions

Q: What is a Peltier thermoelectric cooler module and how does it work?

A: A Peltier thermoelectric cooler (TEC) module uses the Peltier effect — when DC current flows through two dissimilar semiconductor materials, one side absorbs heat (becomes cold) and the other side dissipates heat (becomes hot). This allows for precise, solid-state cooling or heating with no moving parts. Simply apply 12V DC and attach a heatsink to the hot side for effective thermal management.

Q: What is the difference between TEC1-12705, TEC1-12706, and TEC1-12715?

A: The main differences are in cooling power and current draw. The TEC1-12705 offers up to 45W of cooling at 5A, making it ideal for light-duty or low-power applications. The TEC1-12706 delivers 60–72W at 4.3–4.6A, offering a good balance of efficiency and power. The TEC1-12715 is the most powerful at 134W and 15A, suitable for demanding cooling projects. All three share the same 40×40mm footprint for easy swapping.

Q: Do I need a heatsink with this Peltier module?

A: Yes. A heatsink (and ideally a cooling fan) on the hot side of the module is essential. Without proper heat dissipation on the hot side, the module's performance will degrade significantly and the module could be damaged. We recommend thermally conductive paste between the module and heatsink surfaces for best results.

Q: Can this module be used for heating as well as cooling?

A: Yes. By reversing the polarity of the DC power supply, the cold and hot sides swap, turning the module into a compact heater. This makes TEC modules very versatile for temperature-control applications that require both heating and cooling modes.