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Mean Well

Mean Well DCW12B-05 DC-DC Converter - 12W - 18~36V in ±5V out 1.2A

SKU DCW12B-05
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Overview

DCW12B-05 is the ±5V output model of this series: rated power 12W, typical efficiency 80%.

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-05Specifications from the official datasheet (2024-08-02 edition)

OUTPUT

DC VOLTAGE
±5V
CURRENT RANGE
±240 ~ ±1200mA
RATED POWER
12W
RIPPLE & NOISE (max.)Note.2
50mVp-p
LINE REGULATIONNote.3
±0.5%
LOAD REGULATIONNote.4
±0.5%
VOLTAGE ACCURACY
±2.0%
SWITCHING FREQUENCY
400KHz min.
EXTERNAL CAPACITANCE LOAD (max.)
670uF

INPUT

VOLTAGE RANGE
18 ~ 36VDC
EFFICIENCY (Typ.)
80%
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-05 Mechanical Specification
Mechanical Specification
DCW12B-05 Packing
Packing

Downloads

FAQ

What are the key electrical specs of the Mean Well DCW12B-05?

The DCW12B-05 is a 12W DC-DC converter with a 2:1 input range of 18 to 36V DC. It provides a ±5V output and has a rated current of 1.2A. Mean Well specifies voltage set point accuracy up to ±2.0% max.

What kinds of equipment is the DCW12B-05 commonly suited for?

This model is generally suited to OEM and industrial applications that need compact isolated DC-DC conversion from a nominal 24V-class input range. Its 18 to 36V input window, built-in EMI filter, and shielded metal case make it a practical fit for embedded power designs where stable low-power conversion is required. Final suitability depends on the load requirements and the system's voltage range.

Is the Mean Well DCW12B-05 an isolated DC-DC converter?

Yes. Mean Well specifies 1500V DC input-to-output isolation for the DCW12B-05. The unit also has input-to-output isolation resistance of 100M Ohms at 500V DC under the stated test conditions.

Can the DCW12B-05 be used in demanding temperature environments?

It is rated for operation from -40°C to +71°C, subject to the output derating curve. Storage temperature is specified from -40°C to +105°C. Those ratings make it suitable for many industrial and enclosed equipment environments where wide temperature tolerance is required.

What protection features does the DCW12B-05 include?

The DCW12B-05 includes short circuit and overload protection. Mean Well specifies overload protection at 110% to 180% with auto-recovery, and short circuit protection uses hiccup mode that recovers automatically after the fault is removed.

How compact is the Mean Well DCW12B-05 for space-constrained designs?

This converter is compact at 31.8 x 20.3 x 12.2 mm and weighs about 17.5 g. It also uses a five-sided shield metal case, which helps when a small footprint and mechanical robustness are important. That makes it easier to consider for dense power assemblies and embedded equipment layouts.

What compliance and reliability features are specified for the DCW12B-05?

Mean Well lists EMC compliance to EN55032 Class A, EN61000-4-2, -3, -4, -5, -6, -8, and FCC Part 15 Class A. The converter also includes a built-in EMI filter and is 100% full-load burn-in tested. Mean Well backs this model with a 2-year warranty.

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Mean Well DCW12B-05 DC-DC Converter - 12W - 18~36V in ±5V out 1.2A
Mean Well

Mean Well DCW12B-05 DC-DC Converter - 12W - 18~36V in ±5V out 1.2A

Log in to see price

DCW12B-05 is the ±5V output model of this series: rated power 12W, typical efficiency 80%.

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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