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Mean Well RPS-400-27-TF Green Power Supply 402.3W 27V 9.3A - Medical Power Supply

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

SKU RPS-400-27-TF

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Overview

RPS-400-27-TF is the 27V output model of this series: typical efficiency 93.5%.

RPS-400 is a 400W 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-400 (blank type only) is able to be used for both ClassⅠ(with FG) or ClassⅡ(no FG) system design. The extremely low leakage current is less than 160μ 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-400 series also offers the enclosed style models( -C / TF /SF )

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 configuration
250W convection,400W force air
EMI Class B for ClassⅠ& Class A for Class Ⅱ configuration
No load power consumption<0.5W by PS-ON control
5Vdc standby output, 12Vdc fan supply, Power Good, Power Fail and remote sense
Protections: Short circuit / Overload / Over voltage / Over temperature
Operating altitude up to 4000 meters
3 years warranty

Specifications

RPS-400-27-TFSpecifications from the official datasheet (2026-06-05 edition)

OUTPUT

DC VOLTAGE: 27V
CURRENT 25CFM: 14.9A
CURRENT Convection: 9.3A
RATED POWER 25CFM: 402.3W
RATED POWER Convection: 251.1W
RIPPLE & NOISE (max.)^Note.2: 200mVp-p
VOLTAGE ADJ. RANGE(main output ): 25.6 ~ 28.4V
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 1000ms, 30ms/230VAC 1500ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.): 16ms/230VAC 16ms/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.): 93.5%
AC CURRENT (Typ.): 4.2A/115VAC 2.1A/230VAC
INRUSH CURRENT (Typ.): COLD START 35A/115VAC 70A/230VAC
LEAKAGE CURRENT (max.)^Note.5: Earth leakage current <200μA/264VAC 50Hz , Touch current < 70μA/264VAC

PROTECTION

OVERLOAD: 105 ~ 135% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 29.7 ~ 35.1V Protection type : Shut down o/p voltage, re-power on to recover
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.)
FAN SUPPLY: 12V@0.5A for driving fan ; Tolerance -15% ~+10% at main output 35% rated current (25CFM)
FAN CONTROL: Fan on by 20% load min. (For RPS-400-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., 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 only for RPS-400(Blank), TUV BS EN/ EN 60601-1:2006+A1+A12+A2,BS EN/EN 62368-1 only for RPS-400(Blank), ANSI/AAMI ES60601-1:2005+A2,CAN/CSA C22.2 No. 60601-1:2014+A2, UL 62368-1 only for RPS-400(Blank), 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) only for RPS-400(Blank) Class B(Please see last page note1)
Radiated emission BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32) only for RPS-400(Blank) Class B(Please see last page note1)
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) only for RPS-400(Blank)	Class B(Please see last page note1)
Radiated emission	BS EN/EN55011 (CISPR11), BS EN/EN55032(CISPR32) only for RPS-400(Blank)	Class B(Please see last page note1)
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: 1393.3K hrs min. Telcordia SR-332 (Bellcore) ; 194.1K hrs min. MIL-HDBK-217F (25℃)
DIMENSION Type: RPS-400 RPS-400-C RPS-400-TF RPS-400-SF
DIMENSION L*W*H: 127*76.2*35mm 130*86*43mm 130*86*58.5mm 160*86*43mm 5″*3″*1.37″inch 5.11″*3.39″*1.69″inch 5.11″*3.39″*2.30″inch 6.3″*3.39″*1.69″inch
PACKING P.W.: 0.39Kg 0.51Kg 0.58Kg 0.64Kg
PACKING Q'TY: 36pcs 24pcs 24pcs 24pcs
PACKING G.W.: 15Kg 13.2Kg 14.9Kg 16.4Kg
PACKING M'MENT: 0.96CUFT 0.77CUFT 0.86CUFT 0.91CUFT

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 ClassⅡ (without FG) EMC tests are executed by mounting the unit on a 130mm*86.6mm 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-400-27-TF R P S - 4 0 0 series — R P S - 4 0 0 series

RPS-400-27-TF R P S - 4 0 0 series (2) — R P S - 4 0 0 series (2)

RPS-400-27-TF Output Derating vs Input Voltage — Output Derating vs Input Voltage

RPS-400-27-TF With 25CFM fan — With 25CFM fan

RPS-400-27-TF RPS-400-C (Enclosed type) — RPS-400-C (Enclosed type)

RPS-400-27-TF Illustration (page 7) — Illustration (page 7)

RPS-400-27-TF Illustration (page 8) — Illustration (page 8)

Typical applications

Downloads

Certificates7

Mean Well E227340 UL Certificate PDF Download

Mean Well 0147476-EAC Certificate PDF Download

Mean Well RPS-400-500-TUV Certificate PDF Download

Mean Well RPS-400-500-CB Certificate PDF Download

Mean Well RPS-400-EMC Certificate PDF Download

Mean Well RPS-400-UK-dec Certificate PDF Download

Mean Well RPS-400-CE-dec Certificate PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the RPS-400-27-TF for a 27V automation controller, HMI, or industrial electronics load?

Yes, if the load needs constant 27V DC and stays within 14.9A. The unit is rated for 402.3W with its built-in top fan, which supports larger 27V control and electronics loads.

Is the RPS-400-27-TF suitable for medical systems or diagnostic equipment with a 27V input rail?

It can be used where the equipment requires a constant 27V output and does not exceed 402.3W or 14.9A. The product is listed as medical safety approved (2xMOPP) with earth leakage below 200μA.

Can this power supply handle a 27V bench, rack, or OEM subsystem powered from different AC mains ranges?

Yes, provided the DC load remains within 27V, 14.9A, and 402.3W. Its 80-264VAC input range supports use across a broad span of AC input conditions.

Is the RPS-400-27-TF intended for sealed indoor equipment or exposed outdoor use?

The temperature specification is -30°C to +70°C, which covers a wide operating range. But because no IP rating is provided, the specs do not establish suitability for exposed outdoor or wet-location use.

How does the RPS-400-27-TF differ from the other 27V RPS-400 package options?

All four 27V RPS-400 variants reach 402.3W at 14.9A with 25CFM airflow, built in on the TF and SF, while RPS-400-27 and -C give 251.1W at 9.3A by convection, and their physical sizes differ. The RPS-400-27-TF measures 130.0 x 86.0 x 58.5 mm at 0.58 kg, versus 127.0 x 76.2 x 35.0 mm at 0.39 kg for RPS-400-27, 130.0 x 86.0 x 43.0 mm at 0.51 kg for RPS-400-27-C, and 160.0 x 86.0 x 43.0 mm at 0.64 kg for RPS-400-27-SF.

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