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Mean Well RPS-300-12 Green Power Supply 300W 12V 16.67A - Medical Power Supply

5" x 3" compact sizemedical safety approvedextreme low leakage current

SKU RPS-300-12

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Overview

RPS-300-12 is the 12V output model of this series: typical efficiency 90%.

RPS-300 is a 300W highly reliable green PCB type medical power supply with a high power density on the 5" by 3" footprint. It accepts 90~264VAC input and offers various output voltages between 12V and 48V. The working efficiency is up to 93% and the extremely low no load power consumption is down below 0.5W. The extremely low leakage current is less than 150μA. In addition, it conforms to international medical regulations (2*MOPP) and EMC BS EN/EN55011, perfectly fitting all kinds of BF rated "patient contact" medical system equipment. RPS-300 series also offers the enclosed style model (RPS-300-C).

Features

5"×3" compact size
ANSI/AAMI ES60601-1, IEC/BS EN/EN 60601-1 (2 x MOPP) and IEC/EN/UL 62368-1 approved
Suitable for BF application with appropriate system consideration
200W convection, 300W force air
No load power consumption<0.5W by PS-ON control
Extremely low leakage current
5Vdc standby output, 12Vdc fan supply, Power Good, Power Fail and remote sense
Protections: Short circuit / Overload / Over voltage / Over temperature
Typical Lifetime > 40K hours
3 years warranty

Specifications

RPS-300-12Specifications from the official datasheet (2026-07-14 edition)

OUTPUT

DC VOLTAGE: 12V
RATED CURRENT (20.5CFM): 25A
CURRENT Convection: 0 ~ 16.67A
CURRENT 20.5CFM: 0 ~ 25A
RATED POWER Convection: 200W
RATED POWER 20.5CFM: 300W
RIPPLE & NOISE (max.)^Note.2: 120mVp-p
VOLTAGE ADJ. RANGE (main output ): 11.4 ~ 12.6V
VOLTAGE TOLERANCE^Note.3: ±3.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 2500ms, 30ms/230VAC 3000ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.): 13ms/230VAC/115VAC at full load

INPUT

VOLTAGE RANGE^Note.4: 90 ~ 264VAC 127 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.93/230VAC PF>0.98/115VAC at full load
EFFICIENCY (Typ.): 90%
AC CURRENT (Typ.): 3.5A/115VAC 1.8A/230VAC
INRUSH CURRENT (Typ.): COLD START 35A/115VAC 70A/230VAC
LEAKAGE CURRENT(max.)^Note.5: PCB Type: Earth leakage current <150μA / 264VAC, Touch current <70μA/264VAC Enclosed Type: Earth leakage current <200μA / 264VAC, Touch current <70μA/264VAC

PROTECTION

OVERLOAD: 105 ~ 135% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 13.5 ~ 15V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Protection type : (TSW1)Shut down o/p voltage, recovers automatically after temperature goes down Protection type : (TSW2)Shut down o/p voltage, re-power on to recover

FUNCTION

5V STANDBY: 5Vsb : 5V@0.6A without fan, 1A with fan 20.5CFM ; tolerance ± 2%, ripple : 150mVp-p(max.)
FAN SUPPLY: 12V@0.5A for driving a fan ; Tolerance -15% ~ +10% at main output 20% rated current (20.5CFM)
PS-ON INPUT SIGNAL: Power on: PS-ON = "Hi" or " > 2 ~ 5V" ; Power off: PS-ON = "Low" or " < 0 ~ 0.5V"
POWER GOOD / POWER FAIL: 500ms>PG>10ms ; The TTL signal goes high with 10ms to 500ms delay after power set up ; The TTL signal goes low at least 1ms before Vo below 90% of rated value

ENVIRONMENT

WORKING TEMP.: -30 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃ , 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃ )
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes
OPERATING ALTITUDE^Note.6: 4000 meters

SAFETY & EMC

SAFETY STANDARDS: IEC 60601-1:2005+A1+A2, IEC 62368-1 , TUV BS EN/ EN 60601-1:2006+A1+A12+A2,BS EN/EN 62368-1 ANSI/AAMI ES60601-1:2005+A2, CAN/CSA C22.2 No. 60601-1:2014+A2, UL 62368-1 IEC 60335-1:2010+A1+A2, Dekra BS EN/ EN 60335-1:2012+A11+A13A+A1+A14+A2+A15 EAC TP TC 004 approved
ISOLATION LEVEL: Primary-Secondary: 2xMOPP, Primary-Earth:1xMOPP, Secondary-Earth:1xMOPP
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℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted emission BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32) Class B
Radiated emission BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32) Class B
Harmonic current BS EN/EN61000-3-2 Class A
Voltage flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN55035, BS EN/EN60601-1-2

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibility BS EN/EN61000-4-3 Level 3, 10V/m( 80MHz~2.7GHz ) Table 9, 9~28V/m( 385MHz~5.78GHz )
EFT bursts BS EN/EN61000-4-4 Level 3, 2KV
Surge susceptibility BS EN/EN61000-4-5 Level 4, 4KV/Line-FG; 2KV/Line-Line
Conducted susceptibility BS EN/EN61000-4-6 Level 3, 10V
Magnetic field immunity BS EN/EN61000-4-8 Level 4, 30A/m
Voltage dip, interruption BS EN/EN61000-4-11 100% dip 1 periods, 30% dip 25 periods, 100% interruptions 250 periods

Parameter	Standard	Test Level
Conducted emission	BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32)	Class B
Radiated emission	BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32)	Class B
Harmonic current	BS EN/EN61000-3-2	Class A
Voltage flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibility	BS EN/EN61000-4-3	Level 3, 10V/m( 80MHz~2.7GHz ) Table 9, 9~28V/m( 385MHz~5.78GHz )
EFT bursts	BS EN/EN61000-4-4	Level 3, 2KV
Surge susceptibility	BS EN/EN61000-4-5	Level 4, 4KV/Line-FG; 2KV/Line-Line
Conducted susceptibility	BS EN/EN61000-4-6	Level 3, 10V
Magnetic field immunity	BS EN/EN61000-4-8	Level 4, 30A/m
Voltage dip, interruption	BS EN/EN61000-4-11	100% dip 1 periods, 30% dip 25 periods, 100% interruptions 250 periods

OTHERS

MTBF: PCB type: 2853.1K hrs min. Telcordia SR-332 (Bellcore) ; 160.0K hrs min. MIL-HDBK-217F (25℃) Enclosed type: 1487.9K hrs min. Telcordia SR-332 (Bellcore) ; 163.8K hrs min. MIL-HDBK-217F (25℃)
DIMENSION (L*W*H): PCB type:127*76.2*35mm or 5"*3"*1.37"inch Enclosed type:130*86*43mm or 5.11"*3.39"*1.69"inch
PACKING: PCB type:0.37Kg; 36pcs/14.3Kg/0.96CUFT Enclosed type:0.563Kg; 24pcs/14.5Kg/0.77CUFT

Test conditions and notes7

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25 of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μf & 47μf parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltages. Please check the derating curve for more details.
5. Touch current was measured from primary input to DC output.
6. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
7. The power supply is considered a component which will be installed into a final equipment. All the ClassⅠ(with FG) EMC tests are 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." (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )

Technical drawings

RPS-300-12 Block Diagram — Block Diagram

RPS-300-12 Derating Curve — Derating Curve

RPS-300-12 Mechanical Specification — Mechanical Specification

RPS-300-12 ◎ RPS-300-C (Enclosed type) — ◎ RPS-300-C (Enclosed type)

RPS-300-12 Illustration (page 6) — Illustration (page 6)

RPS-300-12 AC Input Connector (CN1) : JST B5P-VH or equivalent — AC Input Connector (CN1) : JST B5P-VH or equivalent

RPS-300-12 DC Output Connector (CN2,CN3) — DC Output Connector (CN2,CN3)

Typical applications

Downloads

Certificates8

Mean Well E227340 UL Certificate PDF Download

Mean Well 0147476-EAC Certificate PDF Download

Mean Well RPS-300-RPS-300-C-TUV Certificate PDF Download

Mean Well RPS-300(C)-Dekra seal Certificate PDF Download

Mean Well RPS-300-300-C-CB Certificate PDF Download

Mean Well RPS-300-EMC Certificate PDF Download

Mean Well RPS-300-CE-dec Certificate PDF Download

Mean Well RPS-300-UK-dec Certificate PDF Download

Test reports1

Mean Well RPS-300-12 Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the RPS-300-12 for a 12V industrial PC, HMI, or control cabinet load?

Yes, this model provides constant 12V output up to 16.67A (200W) by convection, or 25A (300W) with an external 20.5CFM fan. It suits 12V industrial computing, HMI, or control loads that stay within those limits.

Is the RPS-300-12 suitable for powering multiple 12V devices in one embedded or automation system?

It can be used where several 12V loads share a common supply, as long as the combined demand stays within 16.67A and 200W. With an external 20.5CFM fan connected to its fan supply, the limit rises to 25A and 300W.

Can this power supply run 12V medical or laboratory equipment with higher current demand?

Yes, it is identified as a medical power supply and is medical safety approved. For 12V equipment that needs more headroom, this version offers up to 16.67A and 200W by convection (25A and 300W with a 20.5CFM fan) in a 127.0 × 76.2 × 35.0 mm package.

Will the RPS-300-12 work in wide-temperature indoor equipment builds?

The specified operating range is -30°C to +70°C (with load derating per the derating curve), which supports a broad ambient temperature range. The provided specs do not list an IP rating, so they define temperature capability but not any sealed indoor or outdoor enclosure performance.

How does the RPS-300-12 compare with other RPS-300 models?

Within the RPS-300 group, sibling models are RPS-300-15 at 200W, 15V, 13.33A; RPS-300-24 at 200W, 24V, 8.33A; RPS-300-27 at 200W, 27V, 7.4A; and RPS-300-48 at 200.2W, 48V, 4.17A (convection), with corresponding -C variants at the same ratings and 300W for all with an external 20.5CFM fan. The RPS-300-12 and RPS-300-12-C are the 12V options, rated 16.67A/200W by convection and 25A/300W with the fan.

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