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Mean Well

Mean Well DCW12B-12 DC-DC Converter - 12W - 18~36V in ±12V out 500mA

SKU DCW12B-12
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Overview

DCW12B-12 is the ±12V output model of this series: rated power 12W, typical efficiency 84%.

Features

  • 2:1 wide input range
  • 1500VDC I/O isolation
  • Built-in remote ON/OFF control
  • Built-in EMI filter
  • Protections: Short circuit / Overload
  • Cooling by free air convection
  • Five-sided shield metal case
  • 100% full load burn-in test
  • Low cost / High reliability
  • 2 years warranty

Specifications

DCW12B-12Specifications from the official datasheet (2024-08-02 edition)

OUTPUT

DC VOLTAGE
±12V
CURRENT RANGE
±100~ ±500mA
RATED POWER
12W
RIPPLE & NOISE (max.)Note.2
60mVp-p
LINE REGULATIONNote.3
±0.5%
LOAD REGULATIONNote.4
±0.5%
VOLTAGE ACCURACY
±2.0%
SWITCHING FREQUENCY
400KHz min.
EXTERNAL CAPACITANCE LOAD (max.)
100uF

INPUT

VOLTAGE RANGE
18 ~ 36VDC
EFFICIENCY (Typ.)
84%
DC CURRENT Full load
625mA
DC CURRENT No load
35mA
FILTER
Pi network
PROTECTION
Fuse recommended

PROTECTION

OVERLOADNote.5
110 ~ 180% rated output load Protection type : Hiccup mode, recovers automatically after fault condition is removed
SHORT CIRCUIT
All output equipped with over current protection Protection type : Hiccup mode, recovers automatically after fault condition is removed

ENVIRONMENT

WORKING TEMP.
-40 ~ +71℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-40 ~ +105℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.05% / ℃ (0 ~ 50℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS
EAC TP TC 020/2011 approved
WITHSTAND VOLTAGE
I/P-O/P:1.5KVDC
ISOLATION RESISTANCE
I/P-O/P: 100M Ohms / 500VDC / 25℃/ 70% RH
ISOLATION CAPACITANCE
2200pF max.
EMC EMISSION
Compliance to BS EN/EN55032 Class A, FCC part 15 Class A , EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8, light industry level, criteria A , EAC TP TC 020

OTHERS

REMOTE CONTROL
Power ON: R.C. ~ -Vin > 4VDC or open ; Power OFF: R.C. ~ -Vin < 1VDC or short
MTBF
600Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
31.8*20.3*12.2mm (L*W*H) or 1.25"*0.80"*0.48" inch (L*W*H)
PACKING
17.5g ; 15 pcs/per tube, 750 pcs/ 50 tube/per carton
Test conditions and notes5
  1. 1.All parameters are specified at normal input, rated load, 25℃ 70% RH ambient.
  2. 2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1uf & 47uf capacitor.
  3. 3.Line regulation is measured from low line to high line at rated load.
  4. 4.Load regulation is measured from 20% to 100% rated load.
  5. 5.Please prevent the converter from operating in overload or short circuit condition for more than 30 seconds.

Technical drawings

DCW12B-12 Mechanical Specification
Mechanical Specification
DCW12B-12 Packing
Packing

Downloads

FAQ

What input and output does the Mean Well DCW12B-12 provide?

The DCW12B-12 is a 12W DC-DC converter with a 2:1 input range of 18 to 36VDC. It provides dual ±12VDC outputs with a rated current of 500mA. This makes it suitable for designs that need regulated positive and negative 12V rails from a 24V nominal DC source range.

Is the DCW12B-12 an isolated DC-DC converter?

Yes. This model provides 1500VDC input-to-output isolation, with isolation resistance rated at 100M Ohms at 500VDC. That isolation can help where separation between the source side and load side is required within the product design.

What protection features are included in the DCW12B-12?

The DCW12B-12 includes short circuit and overload protection. Overload protection is specified at 110% to 180% with auto-recovery, and short circuit protection uses hiccup mode that recovers automatically after the fault is removed. These features help protect the converter during abnormal load conditions.

Can the Mean Well DCW12B-12 be used in demanding temperature conditions?

This converter is rated for operation from -40°C to +71°C, subject to the output derating curve. Its storage temperature range is -40°C to +105°C. Cooling is by free air convection, so it is designed for compact embedded use without forced-air cooling hardware.

What makes the DCW12B-12 suitable for compact equipment designs?

The DCW12B-12 has a compact metal package measuring 31.8 x 20.3 x 12.2mm and weighs about 17.5g. It also uses a five-sided shield metal case and includes a built-in EMI filter. Those characteristics make it a fit for space-constrained DC power conversion applications where shielding and size matter.

What electrical performance can buyers expect from the DCW12B-12?

Voltage set point accuracy is rated at ±2.0%, with line regulation of ±0.5% and load regulation of ±0.5% from 20% to 100% load. Typical efficiency is listed at 84%. For a 12W isolated module, these figures support stable output performance in regulated DC systems.

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Mean Well DCW12B-12 DC-DC Converter - 12W - 18~36V in ±12V out 500mA
Mean Well

Mean Well DCW12B-12 DC-DC Converter - 12W - 18~36V in ±12V out 500mA

Log in to see price

DCW12B-12 is the ±12V output model of this series: rated power 12W, typical efficiency 84%.

Features

  • 2:1 wide input range
  • 1500VDC I/O isolation
  • Built-in remote ON/OFF control
  • Built-in EMI filter
  • Protections: Short circuit / Overload
  • Cooling by free air convection
  • Five-sided shield metal case
  • 100% full load burn-in test
  • Low cost / High reliability
  • 2 years warranty
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