Description
Product Overview
The SP1848-27145 is a specialized 40mm x 40mm (4x4cm) thermoelectric power generator module. It features unique high-temperature internal soldering capable of safely handling up to 120°C to 150°C—temperatures that would instantly melt standard cooling Peltier chips (like the TEC1-12706).
When a temperature differential ($\Delta T$) is established between its two faces (by heating one side while actively cooling the other), the module acts as a solid-state battery, generating a continuous DC voltage and current.
Technical Specifications & Power Yields
The electrical output is entirely dependent on the temperature difference ($\Delta T$) between the hot and cold plates:
| Parameter / Conditions | Specification / Expected Output |
| Model | SP1848-27145 (SA) |
| Dimensions | $40\text{mm} \times 40\text{mm} \times 3.4\text{mm}$ to $3.8\text{mm}$ |
| Max Temperature Rating | $120^\circ\text{C}$ (Continuous) up to $150^\circ\text{C}$ (Peak) |
| $\Delta T = 20^\circ\text{C}$ Difference | Generates $\approx 0.97\text{V}$ @ $225\text{mA}$ |
| $\Delta T = 40^\circ\text{C}$ Difference | Generates $\approx 1.80\text{V}$ @ $368\text{mA}$ |
| $\Delta T = 60^\circ\text{C}$ Difference | Generates $\approx 2.40\text{V}$ @ $469\text{mA}$ |
| $\Delta T = 80^\circ\text{C}$ Difference | Generates $\approx 3.60\text{V}$ @ $558\text{mA}$ |
| $\Delta T = 100^\circ\text{C}$ Difference | Generates $\approx 4.80\text{V}$ @ $669\text{mA}$ (Max Power Output) |
| Wire Lead Length | ~300mm (color-coded: Red = Positive, Black = Negative) |
Key Features
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True Seebeck Optimization: Internal bismuth telluride formulations are structured differently than cooling modules to yield the highest possible conversion rate from thermal energy to electric current.
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High-Temperature Resilience: Built with high-melting-point internal solder arrays, allowing it to withstand prolonged contact with hot surfaces up to 150°C without breaking down.
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Standard 4x4cm Size: Fits industry-standard clamping assemblies, blocks, and CPU-style heatsinks for straightforward DIY engineering.
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Eco-Friendly Energy Harvesting: Completely silent, clean, and vibration-free process that recycles free ambient or industrial waste heat into electricity.
Common Applications
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Green Energy Projects: Building wood-stove fans, camp-stove USB chargers, or localized energy harvesters that run off fire or hot exhaust pipes.
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Remote IoT & Sensor Powering: Ideal for providing perpetual power to remote telemetry sensors clamped onto industrial hot water or steam lines, eliminating the need for battery replacements.
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Educational Science Labs: Used in physics classes and engineering schools to demonstrate thermal-to-electrical energy conversion and the Seebeck effect.
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Low-Power “Joule Thief” Electronics: Creating survival flashlights that turn on purely from the heat of a human hand or a hot cup of coffee paired with a small voltage-step-up (boost) converter.
Operational Guide & Pro-Tips
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Wiring Output: When generating electricity, the Red wire is your positive output and the Black wire is your negative output.
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Orientation Matters: On this specific module, the side with the part number printed on it is traditionally designated to face the cold-side heat sink, while the blank ceramic side faces your heat source.
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The Secret is Thermal Management: You cannot just throw this chip into heat; if both sides get hot, it outputs 0V. To generate power efficiently, you must fiercely cool the cold side using a large aluminum fins-and-fan combo or a water block while heating the opposite side. Thermal paste on both sides is mandatory!
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