TEC1-12704 Thermoelectric Peltier Cooler Module 12V DC 4A

Specifications

• Model: TEC1-12704
• Operating Voltage: 12V DC (Nominal) | 15.4V (Max)
• Max Current (Imax): 4 Amps
• Max Power (Qmax): ~36 Watts
• Dimensions: 40mm x 40mm x 3.6mm
• Wire Length: ~150mm (Pre-tinned)
• Internal Resistance: ~3.0-3.3Ω
• Operating Temperature: -50°C to +80°C

Applications

• DIY Refrigeration: Perfect for custom beverage coolers, insulin travel cases, or portable camping fridges.
• Active Component Cooling: Cool CCD cameras for astronomy or overclocked CPUs/GPUs where passive cooling fails.
• Science Experiments: Demonstrate the Seebeck effect (generating electricity from heat) or the Peltier effect in classrooms.
• Dehumidifiers: Use the cold side to condense moisture from the air in small enclosures.

Features:

• Quality-tested cooling cells. We have carefully selected the Peltiers from the best manufacturers for the best cooling and efficiency
• Solid-state, vibration-free, noise-free. Traditional heat pumps are bulky and have moving parts
• Simple to install and operate
• Should be used with a heat sink

Operating Tips:

1. Do not exceed Imax or Vmax when operating a module.
2. Please carry out moisture protection options (sealing) in the final application use.
3. Life expectancy: 200,000 hours.
4. Failure rate based on long-term testing: 0.2%.

Critical Safety & Wiring

WARNING: DO NOT RUN WITHOUT A HEATSINK If you power this module for even 2 seconds without a heatsink on the hot side, the ceramic plates will crack due to thermal shock, and the internal semiconductors will burn out.

• The Rule: Always attach the heatsink before applying power.
• Identification: Usually, the side with the printed text "TEC1-12704" is the COLD side. The blank side is the HOT side.

Wiring:

• Red Wire: +12V Positive
• Black Wire: Ground (Negative)
  
  

Package Includes: 1 x TEC1-12704 Thermoelectric Peltier Cooler Module 12V 4A

Frequently Asked Questions (FAQ)

• Which side gets cold?
  Typically, the side with the Model Number printing (TEC1-12704) is the Cold Side. The blank side is the Hot Side.
• Can I run this on 5V?
  Yes, but cooling performance will be significantly reduced (roughly 20-30% of max power).
• Do I need thermal paste?
  Absolutely. You must apply a thin layer of thermal grease on both sides to ensure efficient heat transfer to your heatsinks.
• Why is my cold side getting hot?
  This means you are not removing heat fast enough from the hot side. The heat is "backing up" and soaking through the module. Upgrade your hot-side heatsink and fan.
• Can I stack two modules?
  Yes, stacking (multi-stage cooling) can achieve lower temperatures, but the hot-side unit must be significantly more powerful than the cold-side unit to handle the combined heat load.
• What power supply do I need?
  We recommend a 12V 5A SMPS or Adapter. The module draws up to 4A.
• Can this generate electricity?
  Yes, if you heat one side and cool the other (Seebeck effect), it will generate a small voltage, but it is not optimized for power generation.
• Is it waterproof?
  The module faces are sealed with silicone (RTV), making it moisture-resistant, but the wire connections should not be submerged.
• How do I control the temperature?
  You can use a PWM controller or a thermostat module like the W1209 to cycle the power on and off.
• Does it vibrate?
  No, it is solid-state with no moving parts, making it silent and vibration-free.
• What is the maximum temperature difference (Delta T)?
  Ideally ~67°C, meaning if the hot side is held at 25°C, the cold side can theoretically reach -42°C (in a vacuum with zero load). In reality, expect a 20-40°C drop.
• Can I reverse the polarity?
  Yes, reversing the Red/Black wires will swap the hot and cold sides.
• How long does it last?
  With proper heat management (keeping hot side <60°C), life expectancy exceeds 200,000 hours.
• Why is this better than the 12706 (6A)?
  It generates less waste heat, making it easier to cool with smaller heatsinks or battery-powered setups.
• Can I cut the wires?
  Yes, but ensure you have a solid connection. Do not pull the wires from the ceramic body.
• Does it come with a heatsink?
  No, this listing is for the bare Peltier module only.
• Can I use a battery?
  Yes, a 12V Lead-Acid or 3S LiPo battery works well, provided it can handle a 4A continuous draw.
• What happens if I don't use a fan?
  Passive aluminum blocks usually saturate quickly. Active airflow (fan) is highly recommended for continuous operation.
• Is it suitable for cooling a human?
  No, the surface area is too small, and direct contact can cause frostbite or burns. It is for cooling components or small air volumes.
• Can I use PWM to dim/control it?
  Yes, but high-frequency PWM is preferred to reduce thermal stress on the internal junctions.