Storage Temperature refers to the allowable ambient temperature range for storing a power supply in a non-operating state to prevent performance degradation.
While the storage temperature range is typically wider than the operating temperature range, maintaining the environment within these limits is critical for long-term reliability.
Why Storage Temperature Matters
- High-Temperature Risks: Avoid storing power supplies at high temperatures for extended periods. High heat can accelerate the deterioration of electrolytic capacitors (e.g., electrolyte evaporation or "dry-out"), which may lead to a decrease in capacitance and an increase in ESR (Equivalent Series Resistance), ultimately affecting the output stability.
- Low-Temperature Risks & Condensation: While very low temperatures may not cause immediate permanent damage, the primary risk occurs when moving a device from a cold storage area to a warmer, humid environment. This temperature difference can cause moisture to condense on internal components (condensation), which may lead to short circuits or corrosion if the power is turned on immediately.
Guidelines for Safe Storage and Startup
- Avoid Extreme Fluctuations: Store the unit in a stable environment away from direct sunlight or heat sources.
- Acclimation Period: If a power supply has been stored at temperatures significantly lower than the intended operating environment, allow it to reach room temperature naturally before applying power. This prevents the risks associated with internal condensation.
- Humidity Control: Ensure that the storage area adheres to the specified relative humidity limits to prevent oxidation of connectors and circuit boards.
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