TEC1-12705 Thermoelectric Cooler Peltier Module
Standard 40x40mm Solid-State Heat Pump for Efficient Cooling
The TEC1-12705 is a popular thermoelectric cooler (Peltier) module that creates a temperature differential when powered by DC current, making one side hot and the other cold [citation:1]. With 127 semiconductor couples in a compact 40x40mm footprint, it is widely used in CPU cooling, portable refrigerators, and medical instruments [citation:1].
Reliable SolidState Operation Vibrationfree, noisefree, and maintenance-free [citation:1]
Reversible Polarity - Switch between cooling and heating by reversing power connections [citation:1]
Maximum Operating Voltage: 15.4V to 15.5V [citation:5][citation:6]
Maximum Current: 5A to 5.3A [citation:2][citation:5]
Maximum Cooling Power: 43W to 57W depending on model variant [citation:2][citation:4]
Maximum Temperature Difference (ΔT): 60°C to 68°C [citation:2][citation:5]
Internal Resistance: 2.4Ω to 2.7Ω [citation:5][citation:12]
Dimensions: 40mm x 40mm x 3.8mm (approx.) [citation:5][citation:8]
Wire Length: 150mm to 300mm (varies by supplier) [citation:1][citation:6]
Key Features
- Solid-state operation with no moving parts for long life [citation:1]
- Simple to install and operate with standard DC power supplies [citation:1]
- Sealed construction for moisture protection (most variants) [citation:1][citation:4]
= Applications =
- CPU, GPU, and laser diode cooling [citation:1]
- Portable refrigerators and beverage coolers [citation:1]
- Medical instruments and laboratory equipment [citation:1]
- Temperature control for CCD cameras [citation:1]
Popular Peltier Model Widely available and welldocumented for DIY projects
Easy Integration - Standard 40x40mm size compatible with common heatsinks
√ Life expectancy of 200,000 hours with proper use [citation:1]
√ Industrial temperature range of -55°C to +83°C [citation:4][citation:9]
Important Operating Tips
The hot side of the module requires a heatsink at all times to prevent thermal runaway [citation:1][citation:11]. Without adequate heat removal, the module will overheat and may be permanently damaged [citation:1].
Always mount a heatsink on the hot side before applying power [citation:1]
Do not exceed Imax or Vmax ratings [citation:1]
For moisture-sensitive applications, apply silicone sealing around the edges [citation:1][citation:4]
Troubleshooting
Module heats up but doesn't cool effectively:
- Ensure the hot side has adequate heatsinking and airflow [citation:1]
- Check polarity - reversing power swaps hot/cold sides [citation:1]
- Verify power supply meets the current requirement (minimum 5A) [citation:1]
Note: Specifications vary between different suppliers and product variants (Standard vs. ProRange models) . Verify your specific module's datasheet for exact specifications. Do not exceed 80% of maximum ratings for longterm reliability.