Mean Well EPP-120S Series 120W Green Open Frame Power Supply

Brand: MEAN WELL

The EPP-120S series offers highly reliable green PCB type power supplies with a high power density, featuring a compact 3"x2" footprint. These units accept 80~264VAC input and provide various output voltages from 12V to 48V. They achieve up to 94% efficiency and maintain an extremely low no-load power consumption below 0.3W. The EPP-120S series is designed for compatibility with both Class I (with FG) and Class II (no FG) system designs. They incorporate comprehensive protection functions and comply with international safety regulations including TUV BS EN/EN62368-1, BS EN/EN60335-1, UL62368-1, and IEC62368-1. The EPP-120S series is positioned as a high price-to-performance power supply solution for diverse industrial applications.

Key Features

3"x2" Compact Size
120W convection, 150W peak (10sec.)
EMI for both Class I & Class II configuration
-30~+85°C wide range operating temperature
No load power consumption < 0.3W
High efficiency up to 94%
Protections: Short circuit / Overload / Over voltage / Over temperature
Operating altitude up to 5000 meters (Note.5)
3 years warranty

Applications

Industrial automation machinery
Industrial control system
Mechanical and electrical equipment
Electronic instruments, equipments or apparatus

Specifications

Parameter	EPP-120S-12	EPP-120S-15	EPP-120S-24	EPP-120S-27	EPP-120S-48
DC VOLTAGE	12V	15V	24V	27V	48V
CURRENT (Convection)	9.5A	7.6A	5A	4.44A	2.5A
CURRENT (Peak, 10 sec.)	11.8A	9.5A	6.25A	5.55A	3.125A
RATED POWER (Convection)	114W	114W	120W	119.9W	120W
RATED POWER (Peak, 10 sec.)	141.6W	142.5W	150W	149.8W	150W
RIPPLE & NOISE (max.) Note.2	100mVp-p	120mVp-p	150mVp-p	150mVp-p	200mVp-p
VOLTAGE ADJ. RANGE	11.4~12.6V	14.3~15.8V	22.8~25.2V	25.6~28.4V	45.6~50.4V
VOLTAGE TOLERANCE Note.3	±2.0%	±2%	±1.0%	±1.0%	±1.0%
LINE REGULATION	±0.5%	±0.5%	±0.5%	±0.5%	±0.5%
LOAD REGULATION	±1.0%	±1.0%	±1.0%	±1.0%	±1.0%
SETUP, RISE TIME	600ms, 30ms/230VAC \| 600ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.)	15ms/230VAC \| 15ms/115VAC at full load
VOLTAGE RANGE Note.4	80~264VAC	113~370VDC
FREQUENCY RANGE	47~63Hz
POWER FACTOR	PF>0.94/230VAC \| PF>0.98/115VAC at full load
EFFICIENCY (Typ.)	91%	92%	93%	94%	93.5%
AC CURRENT (Typ.)	2.3A/115VAC \| 1.1A/230VAC
INRUSH CURRENT (Typ.)	COLD START 30A/115VAC \| 60A/230VAC
LEAKAGE CURRENT	<0.75mA/240VAC
OVERLOAD	130~160% rated output power Protection type: Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE	13.2~15.6V	16.5~19.5V	26.4~31.2V	29.7~35V	52.8~62.4V
OVER TEMPERATURE	Protection type: Shut down o/p voltage, recovers automatically after temperature goes down
WORKING TEMP.	-30~+85°C (Refer to "Derating Curve")
WORKING HUMIDITY	20~90% RH non-condensing
STORAGE TEMP.	-40~+85°C
ENVIRONMENT TEMP. COEFFICIENT	±0.03%/°C (0~50°C)
VIBRATION	10~500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes
OPERATING ALTITUDE (Note.5)	5000 meters
SAFETY STANDARDS	UL62368-1, TUV BS EN/EN62368-1, BS EN/EN60335-1, IEC62368-1, EAC TP TC 004 approved
WITHSTAND VOLTAGE	I/P-O/P:4KVAC \| I/P-FG:2KVAC \| O/P-FG:1.5KVAC
ISOLATION RESISTANCE	I/P-O/P, I/P-FG, O/P-FG: 100M Ohms / 500VDC / 25°C/70% RH

EMC Compliance

EMC Emission

Parameter	Standard	Test Level / Note
Conducted emission	BS EN/EN55032 (CISPR32)	Class B
Radiated emission	BS EN/EN55032 (CISPR32)	Class B, Class II: Class A

EMC Immunity

Parameter	Standard	Test Level / Note
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 3, 4KV contact
RF field susceptibility	BS EN/EN61000-4-3	Level 3, 10V/m (80MHz~2.7GHz)
EFT bursts	BS EN/EN61000-4-4	Table 9, 9~28V/m (385MHz~5.78GHz)
Surge susceptibility	BS EN/EN61000-4-5	Level 3, 2KV
Conducted susceptibility	BS EN/EN61000-4-6	Level 4, 4KV/Line-FG; 2KV/Line-Line
Magnetic field immunity	BS EN/EN61000-4-8	Level 3, 10V
Voltage dip, interruption	BS EN/EN61000-4-11	Level 4, 30A/m

Technical Diagrams and Curves

Block Diagram

The block diagram illustrates the internal structure of the power supply. It shows the signal flow starting from the Input (I/P) which goes through an EMI Filter, then to a Rectifier & PFC stage, followed by a Switching stage. This is then processed by Rectifiers & Filter before reaching the Output (+V, -V). The diagram also indicates protection circuits such as O.T.P. (Over Temperature Protection), O.L.P. (Over Load Protection), and O.V.P. (Over Voltage Protection), all managed by a Detection Circuit. A Functional Ground (FG) connection is also present. The switching frequency (fosc) is specified as 85KHz.

Derating Curve (Convection)

This graph shows the power derating based on ambient temperature for convection cooling. The Y-axis represents Load (%) and the X-axis represents Ambient Temperature (°C). The curve indicates that the power supply can operate at 100% load up to approximately 50°C. Beyond this point, the load capacity decreases, reaching 0% load at around 85°C.

Output Derating VS Input Voltage

This graph illustrates how the output power (Load in Watts) varies with the input voltage (VAC). It displays different derating curves for specific models. For example, the 12V and 15V models (EPP-120S-12, EPP-120S-15) are rated for 114W convection, while the 24V, 27V, and 48V models (EPP-120S-24, EPP-120S-27, EPP-120S-48) are rated for 120W convection. The graph shows that the maximum rated power is maintained across a significant input voltage range, typically from 90-264VAC for the 120W models and 80-264VAC for the 114W models.

Mechanical Specifications

The power supply has overall dimensions of 76.2mm (Length) x 50.8mm (Width) x 28mm (Height), which is equivalent to 3" x 2" x 1.1". The mechanical drawing shows the layout of key components including the AC input connector (CN1), DC output connector (CN100), fuses (FS1), capacitors (C1, C5, C100, C105, C119), and heatsink (HS1). It is noted that HS1 must maintain a safety isolation distance with the system case.

AC Input Connector (CN1)

Pin No.	Assignment	Mating Housing	Terminal
1	AC/L	JST VHR or equivalent	JST SVH-21T-P1.1 or equivalent
3	AC/N	JST VHR or equivalent	JST SVH-21T-P1.1 or equivalent
2	No Pin

DC Output Connector (CN100)

Pin No.	Assignment	Mating Housing	Terminal
1,2	+V	JST VHR or equivalent	JST SVH-21T-P1.1 or equivalent
3,4	-V	JST VHR or equivalent	JST SVH-21T-P1.1 or equivalent

Notes

Note 1: EPP-120S models deliver EMI Class B for both conducted emission and radiated emission when configured into a Class I (with FG) system.
Note 2: EPP-120S models deliver EMI Class B conducted emission and Class A radiated emission with King Core K5B RC (12*15*7) in the output cable when configured into a Class II (no FG) system.
All parameters not specially mentioned are measured at 230VAC input, rated load, and 25°C ambient temperature.
Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uF & 47uF parallel capacitor.
Tolerance includes set up tolerance, line regulation and load regulation.
Derating may be needed under low input voltages. Please check the derating curve for more details.
The ambient temperature derating of 3.5°C/1000m for fanless models and of 5°C/1000m for fan models for operating altitude higher than 2000m (6500ft).
The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to "EMI testing of component power supplies."
Product Liability Disclaimer: For detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx.

Installation Manual

Please refer to: http://www.meanwell.com/manual.html

GTIN Code

MW Search: https://www.meanwell.com/serviceGTIN.aspx

Model Encoding Diagram

The model encoding follows the pattern EPP-120S-[output voltage code]. The diagram shows components of the model name: Output voltage, Rated wattage, and Series name.

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