TEC1-12705 Thermoelectric Cooler (Peltier) 40×40mm

The TEC1-12705 Thermoelectric Cooler Module is a compact solid-state component designed for electronic cooling and heating applications. Based on the Peltier effect, it transfers heat from one ceramic surface to the other when powered by a DC supply. This creates a cold side and a hot side, allowing the module to be integrated into custom thermal-management systems without using a compressor or moving parts.

With a compact 40 × 40 mm form factor, the TEC1-12705 is suitable for DIY refrigeration projects, portable cooling devices, electronics experiments, and temperature-control systems. Reversing the DC supply polarity reverses the direction of heat transfer, enabling the module to provide heating or cooling depending on the application.

The module is commonly operated from a 12V DC supply, with a maximum operating current of approximately 5A depending on the manufacturer's specifications. Its cooling performance depends on the electrical operating point, the temperature difference between its two surfaces, and the efficiency of the heatsink assembly. A suitable heatsink and thermal interface material are essential for transferring heat away from the hot side. Without adequate heat dissipation, the module may overheat and its cooling performance will decrease significantly.

The TEC1-12705 is useful for engineers, students, makers, and electronics developers building compact thermal systems or testing thermoelectric cooling principles. It can be combined with temperature sensors, thermostats, and suitable power-control circuits to create temperature-regulated prototypes. For reliable operation, mount the module between flat thermal surfaces with even pressure, protect it from moisture where condensation may occur, and do not exceed its specified voltage or current limits.

Features:

• Thermoelectric cooling and heating

• Compact 40 × 40 mm design

• Solid-state operation with no moving parts

• Reversible heat-transfer direction by changing DC polarity

• Suitable for 12V DC systems

• Maximum operating current of approximately 5A, depending on version

• Fast thermal response in properly designed assemblies

• Suitable for DIY and engineering prototypes

• Compatible with heatsinks and temperature-control systems

Specifications:

• Model: TEC1-12705

• Product Type: Thermoelectric Cooler / Peltier Module

• Dimensions: 40 × 40 mm

• Typical Thickness: Approximately 3.6–4.2 mm, depending on version

• Typical Operating Voltage: 12V DC

• Maximum Voltage: Approximately 15V DC; verify the module datasheet

• Maximum Current: Approximately 5.0–5.3A, depending on manufacturer

• Maximum Cooling Capacity: Varies by manufacturer and test conditions; some datasheets specify approximately 43–54W

• Maximum Temperature Difference: Approximately 66°C or higher under specified no-load test conditions; actual performance varies

• Construction: Thermoelectric semiconductor elements between ceramic plates

• Cooling Method: Heat transfer through the Peltier effect

Performance figures are manufacturer- and test-condition-dependent. Maximum cooling capacity and maximum temperature difference cannot generally be achieved simultaneously.

Applications:

• DIY mini refrigerators and cooler boxes

• Electronic component cooling experiments

• Temperature-controlled enclosures

• Small liquid-cooling prototypes

• Laboratory and educational projects

• Semiconductor and sensor temperature experiments

• Portable cooling-system development

• Thermoelectric heating and cooling demonstrations

• Custom thermal-management systems