Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well RPS-120S-12 Green Power Supply 114W 12V 9.5A - Medical Power Supply

SKU RPS-120S-12

Log in to see price Trade pricing & online ordering for account holders

Available to order

Overview

RPS-120S-12 is the 12V output model of this series: typical efficiency 91%.

RPS-120S is a 120W highly reliable green PCB type medical power supply with a high power density on a 3" by 2" footprint. It accepts 80~264VAC input and offers various models with the output voltages between 12V and 48V. The working efficiency is up to 94% and the extremely low no load power consumption is down below 0.3W. RPS-120S is able to be used for both ClassⅠ(with FG) & ClassⅡ(no FG) system design. The extremely low leakage current is less than 150 μA. In addition, it conforms to the international medical regulations (2*MOPP) and EMC BS EN/EN55011, perfectly fitting all kinds of BF rated “patient contact” medical system equipment.

Features

3"×2" compact size
120W convection, 150W peak (10sec.)
Medical safety approved (2 x MOPP) according to ANSI/AAMI ES60601-1 and IEC/BS EN/EN60601-1
Suitable for BF application with appropriate system consideration
EMI for both ClassⅠ& Class Ⅱ configuration
-30~+85℃ wide range operating temperature
No load power consumption<0.3W
Extremely low leakage current
Protections: Short circuit / Overload / Over voltage / Over temperature
Operating altitude up to 4000 meters (Note.6)
3 years warranty

Specifications

RPS-120S-12Specifications from the official datasheet (2026-02-28 edition)

OUTPUT

DC VOLTAGE: 12V
CURRENT Peak(10 sec.): 11.8A
CURRENT Convection: 9.5A
RATED POWER Peak(10 sec.): 141.6W
RATED POWER Convection: 114W
RIPPLE & NOISE (max.)^Note.2: 100mVp-p
VOLTAGE ADJ. RANGE: 11.4~12.6V
VOLTAGE TOLERANCE^Note.3: ±2.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±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

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.): 91%
AC CURRENT (Typ.): 2.3A/115VAC 1.1A/230VAC
INRUSH CURRENT (Typ.): COLD START 30A/115VAC 60A/230VAC
LEAKAGE CURRENT(max.)^Note.5: Earth leakage current < 150μA/264VAC , touch current < 100μA/264VAC

PROTECTION

OVERLOAD: 130~160% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 13.2 ~ 15.6V 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

ENVIRONMENT

WORKING TEMP.: -30 ~ +85℃ (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, TUV BS EN/ EN 60601-1:2006+A1+A12+A2, ANSI/AAMI ES60601-1:2005+A2 CAN/CSA C22.2 No. 60601-1:2014+A2, EAC TP TC 004 approved; Design refer to BS EN/EN60335-1(by request)
ISOLATION RESISTANCE: 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) Class B
Radiated emission BS EN/EN55011 (CISPR11) ClassⅠ: Class B , Class Ⅱ: Class A
Harmonic current BS EN/EN61000-3-2 Class A
Voltage flicker BS EN/EN61000-3-3
EMC IMMUNITY: 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 95% dip 1 periods, 30% dip 25 periods, 95% interruptions 250 periods

Parameter	Standard	Test Level
Conducted emission	BS EN/EN55011 (CISPR11)	Class B
Radiated emission	BS EN/EN55011 (CISPR11)	ClassⅠ: Class B , Class Ⅱ: 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	95% dip 1 periods, 30% dip 25 periods, 95% interruptions 250 periods

OTHERS

MTBF: 4050.3K hrs min. Telcordia SR-332 (Bellcore) ; 468.0K hrs min. MIL-HDBK-217F (25℃)
DIMENSION (L*W*H): 76.2*50.8*28mm or 3" * 2" *1.1" inch
PACKING: 0.13Kg; 100pcs/14Kg/1.13CUFT

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 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.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )

Technical drawings

RPS-120S-12 Block Diagram — Block Diagram

RPS-120S-12 Mechanical Specification — Mechanical Specification

Typical applications

Oral irrigator
Hemodialysis machine
Medical monitors
Sleep apnea devices
Pumps machine

Downloads

Certificates6

Mean Well 0147476-EAC Certificate PDF Download

Mean Well RPS-120S-TUV Certificate PDF Download

Mean Well RPS-120S-CB(UL) Certificate PDF Download

Mean Well RPS-120S-EMC Certificate PDF Download

Mean Well RPS-120S-CE-dec Certificate PDF Download

Mean Well RPS-120S-UK-dec Certificate PDF Download

Test reports1

Mean Well RPS-120S-12 Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the RPS-120S-12 for a 12V industrial PC or embedded controller?

Yes, if the equipment needs a constant 12V DC input and draws no more than 9.5A. With a 114W rating and 80-264VAC input range, it suits many embedded and industrial control applications powered from AC mains.

Is the RPS-120S-12 suitable for 12V automation peripherals and I/O hardware?

It can be used with 12V automation peripherals or I/O hardware that require a stable constant voltage source. The output is 12V at up to 9.5A, so the total load must remain within 114W.

Can this model power medical 12V electronics?

The product is a medical power supply and carries IEC 60601-1, ANSI/AAMI ES60601-1, and EAC TP TC 004 approvals. It is suitable where the equipment requires 12V constant voltage up to 9.5A and where those approval needs matter.

Is the RPS-120S-12 a good fit for compact equipment designs?

It is notably compact at 76.2 × 50.8 × 28.0 mm and weighs 0.13 kg. That makes it attractive for equipment designs where internal space is limited but the load still needs up to 12V and 9.5A.

Can the RPS-120S-12 handle hot or cold operating environments?

Its operating temperature range is -30°C to +85°C, which is wider than many enclosed power supplies in this wattage range. No IP rating is listed in the provided data, so the specs do not establish outdoor exposure suitability.

How does the RPS-120S-12 compare with the other RPS-120S models?

The RPS-120S family includes RPS-120S-12 at 114W, 12V, 9.5A; RPS-120S-15 at 114W, 15V, 7.6A; RPS-120S-24 at 120W, 24V, 5A; RPS-120S-27 at 119.9W, 27V, 4.44A; and RPS-120S-48 at 120W, 48V, 2.5A. This model is the 12V option within the RPS-120S series.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Please log in to write a review.

{ "id":8431056781611, "variants" :[{ "context":"default", "variant_id": 45664933151019, "sku":"RPS-120S-12", "inventory_qty" : 0, "customer" :false, "custom_html" :"\u003ca class=\"text-current logged-out-price logged-out\" href=\"https:\/\/wellforces.co.nz\/customer_authentication\/redirect?locale=en\u0026region_country=NZ\"\u003e\n \u003cspan \u003ePlease \u003c\/span\u003e \u003cspan class=\"login-text\"\u003eLogin\u003c\/span\u003e \u003cspan\u003e for Pricing\u003c\/span\u003e\n \u003c\/a\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }