MEAN WELL EPP-400-12 399.6W 12V 33.3A Open Frame

Part numberEPP-400-12
Output voltage 12 V
Rated current 33.3 A
Rated power 399.6 W
$126.96Excluding tax and shipping
Ships in 3–5 business daysLead time is the time from order to dispatch, and does not include transit time.
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EPP-400 model selection table Industrial - Green PCB Type
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Key specifications

Complete technical specifications
Output
Output voltage 12 V
Rated current 33.3 A
Rated power 399.6 W
AC input range 80–264 VAC
Typical efficiency 91.5 %
Mechanical
Operating temperature -30 to 70 °C
Power factor correction Supported
Dimensions (L × W × H) 127 × 76.2 × 35 mm

Is this model right for you?

Within the EPP-400 series, choose by output voltage and adjustment range. EPP-400-12: 12 V, 11.4~12.6V. EPP-400-15: 15 V, 14.3~15.8V. EPP-400-18: 18 V, 17.1~18.9V. EPP-400-24: 24 V, 22.8~25.2V. EPP-400-27: 27 V, 25.6 ~ 28.4V. EPP-400-36: 36 V, 34.2 ~37.8V. EPP-400-48: 48 V, 45.6 ~50.4V.

Product overview

The EPP-400-12 is an AC/DC Open Frame product in the Industrial - Green PCB Type family. It provides a 12 V output with an adjustment range of 11.4~12.6V. The input voltage range is 80 ~ 264VAC 113 ~ 370VDC at 47 ~ 63Hz. Typical efficiency is 91.5%. Dimensions are 127 × 76.2 × 35 mm and net weight is 390 g.

Where this model fits

The EPP-400-12 is used in Embedded & Board-level Design. Its 12 V output and 11.4~12.6V adjustment range suit board-level power conversion inside an equipment enclosure. The product measures 127 × 76.2 × 35 mm and weighs 390 g.

Complete technical specifications

Rev. 2026-03-31
Output
Output voltage 12 V
Rated current 33.3 A
Rated power 399.6 W
Voltage adjustment range 11.4–12.6 V
Ripple & noise 120 mVp-p
Input
AC input range 80–264 VAC
DC input range 113–370 VDC
Frequency range 47–63 Hz
Typical efficiency 91.5 %
Power factor 0.94
Power factor correction Supported
Environmental
Operating temperature -30 to 70 °C
Storage temperature -40 to 85 °C
Operating humidity 20–90 % RH
Vibration 10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes
Mechanical
Dimensions (L × W × H) 127 × 76.2 × 35 mm
Net weight 390.0 g
Safety & compliance
Safety standards UL62368-1, TUV BS EN/EN62368-1,BS EN/EN60335-1, IEC62368-1, CCC GB4943.1, EAC TP TC 004 approved

These approvals are recorded for the series as a whole. Where a line names particular models or ratings, it applies only to those — read it against this part number, and ask us for the certificate if your approval process needs it.

Identification
Part number EPP-400-12
Brand MEAN WELL
Category AC/DC Open Frame
Series EPP-400

Approvals and compliance

From the manufacturer's datasheet for this series

United States

  • UL

    UL Listing or Recognition means UL Solutions tested samples against the applicable UL safety standard and audits the factory that builds them. A UL file number is the usual evidence an inspector or specifier asks for in North America.

Europe

  • TÜV

    A TÜV certificate is third-party testing against the European EN standard. It is the evidence behind a CE declaration rather than a replacement for it: CE remains the manufacturer's own declaration, and the TÜV report is what makes that declaration defensible.

China

  • CCC

    China Compulsory Certification. Mandatory for the product categories in its scope; where it applies, a shipment without it is not clearable. Certification is against the GB standard the datasheet cites.

Eurasian Economic Union

  • EAC

    Conformity with the Eurasian Economic Union technical regulations, covering Russia, Belarus, Kazakhstan, Armenia and Kyrgyzstan. TP TC 004 is the low-voltage regulation and TP TC 020 the electromagnetic-compatibility one, so which number appears tells you what was assessed.

Isolation and electromagnetic compatibility
Withstand voltage I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
EMC emission Compliance to BS EN/EN55032 (CISPR32) Class B, BS EN/EN61000-3-2,-3,CCC GB17625.1, GB/T9254, EAC TP TC 020
EMC immunity Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN55035, BS EN/EN61000-6-2, heavy industry level, EAC TP TC 020

Standards certified against

  • EN60335-1
  • EN62368-1
  • GB4943.1
  • IEC62368-1
  • UL62368-1
Read the datasheet's exact wording

UL62368-1, TUV BS EN/EN62368-1,BS EN/EN60335-1, IEC62368-1, CCC GB4943.1, EAC TP TC 004 approved

Reproduced unedited from the manufacturer's datasheet. Where an approval covers only some models, the wording says so. Ask us for the certificate itself if your approval process needs it.

Certificates

Certificate copy supplied with this model.

  • CE · R50453592

    100%
    CE certificate R50453592

    CE · Certificate number R50453592

Ordering & shipping information

Order and delivery terms
Part number EPP-400-12
Minimum order quantity 1
Country of origin China
Typical packed weight 567 g
Unit weight 390 g

Downloads

EPP-400 model comparison

View all models
ModelOutput voltageRated currentRated powerPriceAvailability
EPP-400-1818 V22.3 A401.4 W$136.44
Ships in 3–5 business days
EPP-400-12 12 V33.3 A399.6 W$126.96
Ships in 3–5 business days
EPP-400-2424 V16.7 A400.8 W$136.44
Ships in 3–5 business days

EPP-400-12 lists a 12 V output and 11.4~12.6V adjustment range; EPP-400-15 lists 15 V and 14.3~15.8V.

EPP-400-12 lists a 12 V output and 11.4~12.6V adjustment range; EPP-400-18 lists 18 V and 17.1~18.9V.

EPP-400-12 lists a 12 V output and 11.4~12.6V adjustment range; EPP-400-24 lists 24 V and 22.8~25.2V.

EPP-400-12 lists a 12 V output and 11.4~12.6V adjustment range; EPP-400-48 lists 48 V and 45.6 ~50.4V.

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Technical data source

Primary source
MEAN WELL
Datasheet revision
2026-03-31
Last verified

View the manufacturer datasheet How we source and verify product data

Specifications are transcribed from the manufacturer datasheet and are subject to change without notice. The current manufacturer datasheet governs in case of any discrepancy.