TEC1-12704 Peltier Cooler Module 40*40 12V4A

SKU: FA2052
Model Number

TEC1-12704
Dimensions

40mm x 40mm x 3.8mm
Internal Couples

127
Maximum Voltage

15.4V DC
Maximum Current

4.0A
Max Cooling Power

~36W – 40W
Max Temp Difference

≥65°C
Operating Temp Range

-50°C to +80°C
Internal Resistance

3.0 ~ 3.3 Ω
Lead Wire

150mm (Approx.) 20 AWG
Product Description
The TEC1-12704 is a high-quality thermoelectric cooler (TEC) designed for applications that require a balance between cooling power and energy efficiency. Operating on the Peltier effect, this solid-state device creates a significant temperature differential between its two ceramic plates. With a 4-Ampere current rating, the 12704 model is an ideal mid-range solution for projects where a standard 6A module generates too much waste heat for the available heatsink to dissipate.
Constructed with 127 internal semiconductor couples made of high-purity bismuth telluride, the TEC1-12704 offers precise temperature control without the need for compressors or moving parts. This makes it an exceptionally reliable choice for medical devices, laboratory instruments, and high-end consumer electronics where silent operation and a long maintenance-free lifespan are essential.
Key Features
  • Balanced Efficiency: The 4A draw provides substantial cooling (up to 36W-40W) while being easier to manage thermally than higher-current modules.
  • Solid-State Reliability: No moving parts, no mechanical wear, and no circulating refrigerants, ensuring a silent and vibration-free operation.
  • Precision Thermal Management: Enables sub-degree temperature stability when paired with a PWM controller or PID system.
  • Slim Profile: At only 3.8mm thick, it integrates easily into compact enclosures and tight hardware layouts.
  • Instant Reversibility: Change the direction of heat flow instantly by simply reversing the DC polarity.
  • Eco-Friendly Design: Fully RoHS compliant and free of CFCs or other ozone-depleting gases.
Usage & Applications
  • Medical Technology: Temperature-controlled storage for insulin, vaccines, and laboratory samples in portable transport kits.
  • Industrial Instruments: Precision cooling for high-performance CCD sensors, laser diodes, and infrared cameras.
  • Consumer Cooling: Core component for small wine chillers, cosmetic refrigerators, and desktop water dispensers.
  • Electronic Hardware: Thermal management for embedded processors, high-speed transceivers, and power-dense circuitry.
  • Scientific Research: Creating highly stable environments for chemical reactions or material testing in micro-incubators
Q: Do I need to use a heatsink with this module?

Yes, absolutely. A Peltier module must have a high-efficiency heatsink and fan attached to the hot side before power is applied. Running the device without heat dissipation will cause the module to overheat and fail permanently within seconds

Q: Which side is the cold side?

Generally, the side with the printed model number (TEC1-12704) is the cold side, and the blank side is the hot side. You can also verify this by applying power for 1 second; one side will chill immediately

Q: Is it necessary to use thermal paste?

Yes. To ensure proper heat transfer, you must apply a thin, even layer of high-quality thermal grease (TIM) between the ceramic plates of the TEC and the heatsinks on both sides.

Q: Can I run this directly from a 12V 10A power supply?

Yes. The module will only draw the current it requires (max 4A) based on the voltage provided. A 12V DC power supply is the standard and most efficient way to power this device

Q: Can I use this module for heating?

Yes. By reversing the red and black wires, the heat flow reverses. The side that was cold will become the heating side.

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