Over 15 years experience of providing support of MEAN WELL Power Supplies
NSP-320-27
The MEAN WELL NSP-320 series is a 320W high-reliability AC/DC enclosed power supply designed for multi-industry applications including industrial automation, mechanical equipment, medical devices, security systems, telecommunications, and PoE power sourcing. With a universal 85–305VAC input and built-in active PFC, it delivers up to 93.5% efficiency and extremely low no-load power consumption for enhanced energy savings. The compact 179×99×30 mm design incorporates forced-air cooling with a DC fan, enabling stable performance across a wide operating temperature range from –40°C to +85°C. Featuring 200% peak power capability, constant current limiting, remote ON/OFF control, remote sense, DC OK signal, and fan ON/OFF temperature control, the NSP-320 series ensures dependable performance in demanding environments. It meets a broad range of global safety standards, including IEC/EN/UL 62368-1, 60601-1 (2×MOPP), 60335-1, 61010-1, and 62477-1, making it suitable for BF-rated medical applications and high-altitude installations up to 5000 meters.
Key Features
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BrandMean Well
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Input Voltage85V~305V
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Standards MetBSMI,CB,CCC,CE,EAC,RCM,TUV,UL
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Operation ModeConstant Voltage
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Operating Temperature-40°C~85°C
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Length7.05 in
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Width3.9 in
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Height1.18 in
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Weight1.48 lb
::specification::
Frequently Asked Questions
What is the main use case for the Mean Well NSP-320-27 power supply?
The Mean Well NSP-320-27 is a 321.3W enclosed AC/DC power supply built for demanding multi-industry equipment. It is suitable for industrial automation, mechanical equipment, medical devices, security systems, telecommunications, PoE power sourcing, and charging systems where a regulated 27V output is needed.
What output does the NSP-320-27 provide?
This model provides a nominal 27V DC output with a rated current of 11.9A. Its power rating is 321.3W, making it a fit for systems that need a higher-power 27V supply in a compact enclosed form factor.
Is the NSP-320-27 designed for harsh industrial environments?
Yes. The NSP-320-27 is specified for operation from -40°C to +85°C, with derating above +60°C, and it uses forced-air cooling with a built-in DC fan for thermal stability. It also has a conformal coated PCB and supports high-altitude installations up to 5000 meters under the stated overvoltage category conditions.
Can the NSP-320-27 be used in medical or high-reliability equipment?
Yes, this series is built for high-reliability applications and includes compliance with IEC/EN/UL 60601-1 with 2 x MOPP. The product description also notes very low leakage current and suitability for BF-rated medical applications, which makes it relevant for certain medical equipment designs.
How energy efficient is the Mean Well NSP-320-27?
The NSP-320 series reaches efficiency up to 93.5% and includes built-in active PFC. It also has very low no-load power consumption, listed as below 0.3-0.5W, which helps reduce standby energy use in always-on systems.
What protection and monitoring features are included in the NSP-320-27?
This model includes constant current limiting and protection functions for short circuit, overload, overvoltage, and overtemperature. It also provides remote ON/OFF control, remote sense with up to 0.3V compensation, a DC OK signal, and fan ON/OFF temperature control for system-level monitoring and reliability.
Why choose the NSP-320-27 over a general-purpose 27V power supply?
The NSP-320-27 is differentiated by its high-reliability design, broad safety certifications, wide operating temperature range, active PFC, and support for demanding industrial and medical-oriented environments. It also offers 200% peak power capability within the NSP-320 series for 12-60V models, which can be useful in applications with short-duration peak load demands.
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