Operating temperature is the range of ambient temperatures within which a power supply can operate safely while meeting its performance specifications. It is typically expressed as a range, such as 0℃ to 40℃. In some cases, "Derating" may be required when operating near the upper limit of this range. Thermal Derating refers to the intentional reduction of the maximum output power to prevent the internal components from overheating, ensuring stable operation even at higher ambient temperatures.
Unless otherwise specified, this rating is based on the unit being placed horizontally in still air. Operating the unit under different conditions, such as mounting it vertically or at an angle, may affect its performance.
For power supplies with forced-air cooling, the operating temperature is measured at the air intake. Effective thermal management--including the selection of appropriate cooling systems and ensuring an unobstructed airflow path--is critical to maintaining the unit within its specified operating temperature.
Note on Lifetime: The operating temperature significantly impacts the power supply's lifetime. A common rule of thumb is that for every 10°C increase in operating temperature, the expected lifetime of the unit is halved. Therefore, operating the power supply at the lower end of its specified temperature range is recommended to maximize its longevity.
Safety Mechanism: Over-temperature Protection (OTP) To prevent permanent damage caused by extreme heat, most of our power supplies are equipped with Over-temperature Protection (OTP). If the internal temperature exceeds a critical threshold, the system will automatically shut down or limit output to protect the hardware.