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Mean Well MDS15B-12 DC-DC Converter - 15W - 18~36V in 12V out 1.25A

SKU MDS15B-12

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Overview

MDS15B-12 is the 12V output model of this series: rated power 15W, typical efficiency 87%.

MDS15 series is 15W isolated and regulated module type medical grade DC-DC converter with 2"x1" package. It features international standard pins, a high efficiency up to 88%, wide working temperature range -40~+90℃, 4KVAC I/P-O/P high isolation voltage, compliance with IEC60601-1 medical standard, continuous-mode short circuit protection, etc. The models account for different input voltage 9~18V, 18~36V and 36~75V 2:1 wide input range, and various output voltage 5V/12V/15V/24V, which are suitable for medical systems, ultra low leakage current.

Features

DIP 2"x1" package with international standard pinout
2:1 wide input range
Low patient leakage current <5μA
Wide operating temperature range -40 ~ +90℃
Medical safety approved (2xMOPP) according to IEC60601-1
No minimum load required
Protections: Short circuit (Continuous) / Overload / Input under voltage
4000VAC high I/O isolation (Reinforced isolation)
3 years warranty

Specifications

MDS15B-12Specifications from the official datasheet (2024-04-30 edition)

MODEL SELECTION TABLE

INPUT VOLTAGE (RANGE): Normal 24V (18 ~ 36V)
INPUT CURRENT NO LOAD: 7mA
INPUT CURRENT FULL LOAD: 700mA
OUTPUT VOLTAGE: 12V
OUTPUT CURRENT: 1250mA
EFFICIENCY (Typ.): 87%
CAPACITOR LOAD (MAX.): 1000μF

INPUT

VOLTAGE RANGE: 18~36Vdc
SURGE VOLTAGE (100ms max.): 12Vin models : 25Vdc, 24Vin models : 50Vdc, 48Vin models : 100Vdc
FILTER: Pi type
PROTECTION: Fuse recommended. 12Vin models: 4A delay time Type, 24Vin models: 2A delay time Type, 48Vin models: 1A delay time Type

OUTPUT

VOLTAGE ACCURACY: ±1%
RATED POWER: 15W
RIPPLE & NOISE^Note.2: 60mVp-p
LINE REGULATION^Note.3: ±0.5%
LOAD REGULATION^Note.4: ±0.5%
SWITCHING FREQUENCY (Typ.): 12Vin/24Vin:250KHz, 48Vin:300KHz

PROTECTION

SHORT CIRCUIT: Protection type : Continuous, automatic recovery
OVERLOAD: 110 ~ 185% rated output power Protection type : Recovers automatically after fault condition is removed
UNDER VOLTAGE LOCKOUT: 12Vin: 7.5Vdc, 24Vin: 15Vdc, 48Vin: 33Vdc

ENVIRONMENT

COOLING: Free-air convection
WORKING TEMP.: -40 ~ +90℃ (Refer to "Derating Curve")
CASE TEMPERATURE: +110℃ max.
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -55 ~ +125℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: 0.03% / ℃ (0 ~ 70℃)
SOLDERING TEMPERATURE: 1.5mm from case of 1 ~ 3sec./260℃ max.
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC ( Note.6)

SAFETY STANDARDS: IEC60601-1(LVD) 3rd edition, EAC TP TC 020/2011(EAC TP TC 004 for 48Vin type only) approved
WITHSTAND VOLTAGE: I/P-O/P 4KVAC
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
ISOLATION CAPACITANCE (Typ.): 100pF
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55011 Class A without external components
Radiated BS EN/EN55011 Class A without external components
EMC IMMUNITY: Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 1, ±15KV air, ±8KV contact
Radiated Susceptibility BS EN/EN61000-4-3 Level 1, 10V/m
EFT/Bursts BS EN/EN61000-4-4 Level 1, ±2KV
Surge BS EN/EN61000-4-5 Level 1, ±1KV Line-Line, ±2KV Line-GND
Conducted BS EN/EN61000-4-6 Level 1, 10Vrms(e.m.f.)
Magnetic Field BS EN/EN61000-4-8 Level 2, 10A/m

Parameter	Standard	Test Level
Conducted	BS EN/EN55011	Class A without external components
Radiated	BS EN/EN55011	Class A without external components

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 1, ±15KV air, ±8KV contact
Radiated Susceptibility	BS EN/EN61000-4-3	Level 1, 10V/m
EFT/Bursts	BS EN/EN61000-4-4	Level 1, ±2KV
Surge	BS EN/EN61000-4-5	Level 1, ±1KV Line-Line, ±2KV Line-GND
Conducted	BS EN/EN61000-4-6	Level 1, 10Vrms(e.m.f.)
Magnetic Field	BS EN/EN61000-4-8	Level 2, 10A/m

OTHERS

MTBF: 1060Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): 50.8*25.4*12mm (2*1*0.47 inch)
CASE MATERIAL: UL94V-0 plastic case
PACKING: 30g; 18pcs/per tube, 432pcs/24 tube max./carton

Test conditions and notes6

1.All parameters are specified at normal input(A:12Vdc, B:24Vdc, C:48Vdc), rated load, 25℃ 70% RH ambient.
2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μf & 47μf capacitor.
3.Line regulation is measured from low line to high line at rated load.
4.Load regulation is measured from 0% to 100% rated load.
5.2xMOPP base on a working voltage of 250Vac between Primary to Secondary.
6.The final equipment must be re-confirm that it still meet EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.”(as available on http://www.meanwell.com)

Technical drawings

MDS15B-12 Pin Configuration — Pin Configuration

MDS15B-12 Derating Curve — Derating Curve

Typical applications

Medical devices
Medical oxygen monitor
CT scanning
Medical carts
Oral care equipment

Downloads

Certificates3

Certificate (MDS15-20-EMC)(EN) PDF Download

Certificate (MDS15-20-CE-dec)(EN) PDF Download

Certificate (MDS15-20-UK-dec)(EN) PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the MDS15B-12 for 12V control electronics in industrial or automation equipment?

Yes, it provides constant-voltage 12V output and is rated for 15W with 1.25A available. It is suited to lower-power 12V control loads when the source feeding it is within 18-36Vdc.

Is the MDS15B-12 a good fit for embedded 12V subsystems in larger control assemblies?

It can be used for embedded 12V sections that need a regulated output rather than an unregulated rail. The core limits are 12V output, 15W maximum power, 1.25A output current, and 18-36Vdc input.

Can this converter power small 12V monitoring, relay, or interface boards?

It is intended for low-power 12V electronics and similar auxiliary functions that fit within 15W and 1.25A. The converter is a constant-voltage type, so it is best aligned with loads specified for a steady 12V supply.

Does the MDS15B-12 support harsh indoor environments or outdoor installations?

The listed operating temperature is -40C to +90C (load derating applies at higher ambient temperatures per the derating curve), which supports wide-temperature operation. No IP rating is shown in the provided specs, so the temperature range is defined but outdoor ingress protection is not.

How does the MDS15B-12 compare with the rest of the MDS15B series?

All MDS15B models are 15W units with 18-36Vdc input. Within that family, MDS15B-05 is 5V at 3A, MDS15B-12 is 12V at 1.25A, MDS15B-15 is 15V at 1A, and MDS15B-24 is 24V at 625mA.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
Mean Well MDS15C-24 DC-DC Converter - 15W - 36~75V in 24V out 625mA	15W	24V	625 Milliampere	IP20	View
Mean Well MDS15C-15 DC-DC Converter - 15W - 36~75V in 15V out 1A	15W	15V	1A	IP20	View
Mean Well MDS15C-12 DC-DC Converter - 15W - 36~75V in 12V out 1.25A	15W	12V	1.25A	IP20	View
Mean Well MDS15C-05 DC-DC Converter - 15W - 36~75V in 5V out 3A	15W	5V	3A	IP20	View
Mean Well MDS15B-24 DC-DC Converter - 15W - 18~36V in 24V out 625mA	15W	24V	625 Milliampere	IP20	View
Mean Well MDS15B-15 DC-DC Converter - 15W - 18~36V in 15V out 1A	15W	15V	1A	IP20	View
Mean Well MDS15B-05 DC-DC Converter - 15W - 18~36V in 5V out 3A	15W	5V	3A	IP20	View
Mean Well MDS15A-24 DC-DC Converter - 15W - 9~18V in 24V out 625mA	15W	24V	625 Milliampere	IP20	View
Mean Well MDS15A-15 DC-DC Converter - 15W - 9~18V in 15V out 1A	15W	15V	1A	IP20	View
Mean Well MDS15A-12 DC-DC Converter - 15W - 9~18V in 12V out 1.25A	15W	12V	1.25A	IP20	View
Mean Well MDS15A-05 DC-DC Converter - 15W - 9~18V in 5V out 3A	15W	5V	3A	IP20	View

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