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Mean Well

ERPF-400-24 Mean Well, AC/DC, 24V / 16.7A / 400W

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Review, teardown, and testing of ERPF-400-24 Mean Well power supply

December 17, 2024
|
LED power supplies

The ERPF-400-24 Mean Well power supply features a 24V DC output with a 16.7A current, supporting AC inputs from 90 to 264V, with reduced power output between 90-200V. It's housed in a metal case with a perforated lid, offering voltage adjustment and active PFC. Testing revealed stable output voltage, low noise, and adequate dynamic performance. Build quality is decent, but compound application has gaps, affecting moisture protection. The unit operates safely up to 100% load, requiring added water protection for outdoor use.

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ERPF-400-24 is a 400W single output enclosed type AC/DC power supply with the active PFC design. It adopts an aluminum case and the interior is semi-potted, protecting the internal electronic components from rain splash and dust. With the complete protection functions, ERPF-400-24 is suitable for the applications such as outdoor LED channel letters, billboard, commercial display, etc.

Features

  • Universal AC input / Full range (Withstand 300VAC surge input for 5 seconds)
  • Built-in active PFC function
  • High efficiency up to 91%
  • Design against rain splash
  • Protections: Short circuit / Overload / Over voltage/ Over temperature
  • Cooling by free air convection
  • LED indicator for power on
  • 100% full load burn-in test
  • 3 years warranty

Applications

  • LED strip lighting
  • LED channel letters
  • LED display

Specification

Output:

  • DC voltage: 24V
  • Rated current: 16.7A
  • Current range: 0 ~ 16.7A
  • Rated power: 400.8W
  • Ripple & noise: 150mVp-p
  • Voltage adj. range: 21.6 ~ 26.4V
  • Voltage tolerance: 士1.0%
  • Line regulation: 士0.5%
  • Load regulation: 士0.5%
  • Setup, rise time: 3000ms, 100ms/115VAC at full load
  • Hold up time (Typ.): 10ms/115VAC at full load

Input:

  • Voltage range: 90 ~ 264VAC
  • Frequency range: 47 ~ 63Hz
  • Efficiency (typ.): 89%
  • AC current (typ.): 3A/115VAC

Protection:

  • Over load: 105 ~ 135% rated output power (Hiccup mode, recovers automatically after fault condition is removed)
  • Over voltage: 27.6 ~ 32.4V (shut down o/p voltage, re-power on to recover)
  • Over temperature: shut down o/p voltage, recovers automatically after temperature goes down

Environment:

  • Working temperature: -22F ~ +158F
  • Working humidity: 20 ~ 90% RH non-condensing

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Full datasheet: https://www.meanwell.com/Upload/PDF/ERPF-400/ERPF-400-SPEC.PDF