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Mean Well RPS-500-18-SF Green Power Supply 500.4W 18V 27.8A - Medical Power Supply

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

SKU RPS-500-18-SF

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Overview

RPS-500-18-SF is the 18V output model of this series: typical efficiency 92.5%.

RPS-500 is a 500W highly reliable green PCB type medical power supply with a high power density on the 5" by 3" footprint. It accepts 80~264VAC input and offers various output voltages between 12V and 48V. The working efficiency is up to 94% and the extremely low no load power consumption is down below 0.5W. RPS-500 (blank type only) is able to be used for both ClassⅠ(with FG) and ClassⅡ(no FG) system design. The extremely low leakage current is less than 220μ A. 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-500 series also offers the enclosed style models( -C / TF /SF )

Features

5"×3" compact size
320W convection,500W force air
550W peak power (3sec.)
ANSI/AAMI ES60601-1, IEC/BS EN/EN 60601-1 (2 x MOPP) and IEC/EN/UL 62368-1 approved
EMI for both ClassⅠ& Class Ⅱ configuration
-30~+70℃ wide range operating temperature
No load power consumption<0.5W by PS-ON control
High efficiency up to 94%
Protections: Short circuit / Overload / Over voltage / Over temperature
5Vdc standby output, 12Vdc fan supply, Power Good, Power Fail and remote sense
Operating altitude up to 4000 meters (Note.5)
LED indicator for power on
3 years warranty

Specifications

RPS-500-18-SFSpecifications from the official datasheet (2026-06-05 edition)

OUTPUT

DC VOLTAGE: 18V
RATED CURRENT Blank 25CFM^Note.7: 27.8A
RATED CURRENT Blank Convection^Note.7: 17.8A
RATED CURRENT - C 25CFM^Note.7: 27.8A
RATED CURRENT - C Convection^Note.7: 17.2A
RATED CURRENT -TF/SF Built-in fan^Note.7: 27.8A
RATED POWER Blank 25CFM^Note.7: 500.4W
RATED POWER Blank Convection^Note.7: 320.4W
RATED POWER - C 25CFM^Note.7: 500.4W
RATED POWER - C Convection^Note.7: 309.6W
RATED POWER -TF/SF Built-in fan^Note.7: 500.4W
PEAK POWER(3sec.): 550W
RIPPLE & NOISE (max.)^Note.2: 200mVp-p
VOLTAGE ADJ. RANGE(main output ): 17.1~18.9V
VOLTAGE TOLERANCE^Note.3: ±3.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 1000ms, 30ms/230VAC 1500ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.): 10ms/230VAC 10ms/115VAC at full load

INPUT

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.): 92.5%
AC CURRENT (Typ.): 5.8A/115VAC 2.9A/230VAC
INRUSH CURRENT (Typ.): COLD START 40A/115VAC 80A/230VAC
LEAKAGE CURRENT (max.)^Note.5: Earth leakage current <220μA/264VAC 50Hz , Touch current < 100μA/264VAC

PROTECTION

OVERLOAD: 105 ~ 135% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 19.8 ~23.4V Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER TEMPERATURE: Protection type : Shut down o/p voltage, recovers automatically after temperature goes down

FUNCTION

5V STANDBY: 5Vsb : 5V@0.6A without fan, 1A with fan 25CFM ; Tolerance ±2%, ripple : 120mVp-p(max.)
12V FAN SUPPLY: 12V@0.5A for driving fan ; Tolerance -15% ~+10% at main output 20% rated current (25CFM)
FAN CONTROL: Fan on by 20% load min. (For RPS-500-xxTF/SF)
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.: -40 ~ +85℃
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(except for RPS-500-C), TUV BS EN/ EN 60601-1:2006+A1+A12+A2,BS EN/EN 62368-1(except for RPS-500-C), ANSI/AAMI ES60601-1:2005+A2,CAN/CSA C22.2 No. 60601-1:2014+A2, UL 62368-1(except for RPS-500-C), EAC TP TC 004 approved; Design refer to BS EN/EN60335-1(by request)
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:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted emission BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32) (except for RPS-500-C) ClassⅠ: Class B , Class Ⅱ: Class A
Radiated emission BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32) (except for RPS-500-C) Class A
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, BS EN/EN61204-3

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

Parameter	Standard	Test Level
Conducted emission	BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32) (except for RPS-500-C)	ClassⅠ: Class B , Class Ⅱ: Class A
Radiated emission	BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32) (except for RPS-500-C)	Class A
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: 1132.3K hrs min. Telcordia SR-332 (Bellcore) ; 144.2K hrs min. MIL-HDBK-217F (25℃)
DIMENSION L*W*H: RPS-500: 127x76.2x41mm 5"x3"x1.61"inch ; RPS-500-C: 130x86x43mm 5.11"x3.39"x1.69"inch ; RPS-500-TF: 130x86x58.5mm 5.11"x3.39"x2.30"inch ; RPS-500-SF: 160x86x43mm 6.3"x3.39"x1.69"inch
PACKING P.W.: RPS-500: 0.46Kg ; RPS-500-C: 0.54Kg ; RPS-500-TF: 0.58Kg ; RPS-500-SF: 0.64Kg
PACKING Q'TY: RPS-500: 30pcs ; RPS-500-C: 24pcs ; RPS-500-TF: 24pcs ; RPS-500-SF: 24pcs
PACKING G.W.: RPS-500: 14.8Kg ; RPS-500-C: 14Kg ; RPS-500-TF: 14.9Kg ; RPS-500-SF: 16.4Kg
PACKING M'MENT: RPS-500: 0.96CUFT ; RPS-500-C: 0.77CUFT ; RPS-500-TF: 0.86CUFT ; RPS-500-SF: 0.91CUFT

Test conditions and notes8

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. Please refer to "Derating curve".
8. The power supply is considered a component which will be installed into a final equipment. All 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-500-18-SF R P S - 5 0 0 series — R P S - 5 0 0 series

RPS-500-18-SF R P S - 5 0 0 series (2) — R P S - 5 0 0 series (2)

RPS-500-18-SF Output Derating vs Input Voltage — Output Derating vs Input Voltage

RPS-500-18-SF With 25CFM fan — With 25CFM fan

RPS-500-18-SF Mechanical Specification — Mechanical Specification

RPS-500-18-SF Illustration (page 6) — Illustration (page 6)

RPS-500-18-SF Illustration (page 7) — Illustration (page 7)

RPS-500-18-SF Illustration (page 8) — Illustration (page 8)

Typical applications

Downloads

Certificates4

Mean Well E227340 UL Certificate PDF Download

Mean Well 0147476-EAC Certificate PDF Download

Mean Well RPS-500-UK-dec Certificate PDF Download

Mean Well RPS-500-CE-dec Certificate PDF Download

Test reports1

Mean Well RPS-500-EMC Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the RPS-500-18-SF for a high-current 18V industrial or automation load?

Yes, if the load is built for an 18V constant-voltage source and stays within 27.8A and 500.4W. That is more than the RPS-500-18 (17.8A) or RPS-500-18-C (17.2A) deliver under convection cooling, without needing an external fan.

Is this model suitable for a 18V embedded platform or computing system with heavier power demand?

It can be a fit when the equipment requires a fixed 18V DC rail and needs up to 27.8A available. The constant-voltage design means the connected system should be specified for 18V operation rather than current-regulated power.

Can the RPS-500-18-SF power an 18V medical device or lab instrument with higher load requirements?

It is intended for 18V equipment where medical safety approval and low leakage current (earth leakage <220μA, touch current <100μA) are relevant. Available output is 500.4W and 27.8A, so the total device demand must remain within those limits.

Would this work for a dense 18V industrial control cabinet or rack system?

It can, provided the system uses 18V DC and does not exceed 27.8A or 500.4W. Its listed size is 160.0 x 86.0 x 43.0 mm, which helps when evaluating cabinet or rack space.

How does the RPS-500-18-SF compare with the other 18V siblings?

The RPS-500-18 (320.4W, 17.8A) and RPS-500-18-C (309.6W, 17.2A) are rated under convection and reach 500.4W and 27.8A with 25CFM forced air, while the RPS-500-18-TF has a built-in fan at 500.4W and 27.8A. The RPS-500-18-SF is one of the top-capacity 18V options listed at 500.4W and 27.8A.

Is the RPS-500-18-SF suitable for outdoor use or only controlled environments?

The operating temperature range is -30°C to +70°C, with output derating at higher temperatures per the derating curve. No IP rating is listed in the provided specifications, so these specs alone do not identify it as outdoor-rated.

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Model	Power	Voltage	Current
Mean Well RPS-500-48-TF Green Power Supply 499.2W 48V 10.4A - Medical Power Supply	499.2W	48V	10.4A	View
Mean Well RPS-500-48-SF Green Power Supply 499.2W 48V 10.4A - Medical Power Supply	499.2W	48V	10.4A	View
Mean Well RPS-500-48-C Green Power Supply 499.2W 48V 6.5A - Medical Power Supply	312W	48V	6.5A	View
Mean Well RPS-500-48 Green Power Supply 499.2W 48V 6.7A - Medical Power Supply	321.6W	48V	6.7A	View
Mean Well RPS-500-36-TF Green Power Supply 500.4W 36V 13.9A - Medical Power Supply	500.4W	36V	13.9A	View
Mean Well RPS-500-36-SF Green Power Supply 500.4W 36V 13.9A - Medical Power Supply	500.4W	36V	13.9A	View
Mean Well RPS-500-36-C Green Power Supply 500.4W 36V 8.6A - Medical Power Supply	309.6W	36V	8.6A	View
Mean Well RPS-500-36 Green Power Supply 500.4W 36V 8.9A - Medical Power Supply	320.4W	36V	8.9A	View
Mean Well RPS-500-27-TF Green Power Supply 499.5W 27V 18.5A - Medical Power Supply	499.5W	27V	18.5A	View
Mean Well RPS-500-27-SF Green Power Supply 499.5W 27V 18.5A - Medical Power Supply	499.5W	27V	18.5A	View
Mean Well RPS-500-27-C Green Power Supply 499.5W 27V 11.5A - Medical Power Supply	310.5W	27V	11.5A	View
Mean Well RPS-500-27 Green Power Supply 499.5W 27V 11.9A - Medical Power Supply	321.3W	27V	11.9A	View
Mean Well RPS-500-24-TF Green Power Supply 499.2W 24V 20.8A - Medical Power Supply	499.2W	24V	20.8A	View
Mean Well RPS-500-24-SF Green Power Supply 499.2W 24V 20.8A - Medical Power Supply	499.2W	24V	20.8A	View
Mean Well RPS-500-24-C Green Power Supply 499.2W 24V 12.9A - Medical Power Supply	309.6W	24V	12.9A	View
Mean Well RPS-500-24 Green Power Supply 499.2W 24V 13.4A - Medical Power Supply	321.6W	24V	13.4A	View
Mean Well RPS-500-18-TF Green Power Supply 500.4W 18V 27.8A - Medical Power Supply	500.4W	18V	27.8A	View
Mean Well RPS-500-18-C Green Power Supply 500.4W 18V 17.2A - Medical Power Supply	309.6W	18V	17.2A	View
Mean Well RPS-500-18 Green Power Supply 500.4W 18V 17.8A - Medical Power Supply	320.4W	18V	17.8A	View
Mean Well RPS-500-15-TF Green Power Supply 499.5W 15V 33.3A - Medical Power Supply	499.5W	15V	33.3A	View
Mean Well RPS-500-15-SF Green Power Supply 499.5W 15V 33.3A - Medical Power Supply	499.5W	15V	33.3A	View
Mean Well RPS-500-15-C Green Power Supply 499.5W 15V 20.7A - Medical Power Supply	310.5W	15V	20.7A	View
Mean Well RPS-500-15 Green Power Supply 499.5W 15V 21.3A - Medical Power Supply	319.5W	15V	21.3A	View
Mean Well RPS-500-12-TF Green Power Supply 499.2W 12V 41.6A - Medical Power Supply	499.2W	12V	41.6A	View

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