Pro-Range TEC1-7104 30x30mm Thermoelectric Cooler Peltier Module - 8.4V, 4A, 18.5W

The Pro-Range TEC1-7104 is rated for a maximum temperature difference (ΔT) of up to 65°C. This is the theoretical maximum gradient between the hot and cold sides under ideal, no-load conditions. In practical applications with a heat sink, the achievable ΔT will be lower and depends heavily on the efficiency of the hot-side heat dissipation system.

You need a DC power supply capable of delivering 8.4V and at least 4A continuously (approximately 33.6W). A regulated, low-noise switching or linear power supply is recommended for stable operation. Ensure the power supply can handle the initial inrush current and has adequate cooling, as the module's performance is sensitive to input voltage stability.

Yes, a heat sink is absolutely mandatory. The hot side of the Peltier module must be actively cooled to prevent overheating and ensure efficient heat pumping to the cold side. Without an effective heat sink (often paired with a fan), the module will quickly reach thermal equilibrium, performance will plummet, and the device may be permanently damaged due to excessive internal temperatures.

Yes. A Peltier module is bidirectional. By reversing the polarity of the applied DC voltage, heat will be pumped in the opposite direction, making the formerly cold side become the hot side. This allows the same module to be used for precise heating applications, making it versatile for temperature control systems that require both cooling and heating cycles.