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Mean Well DCW20W8-12 DC-DC Converter - 20W 9~75V DC in ±12V out 833mA

8:1(9~75VDC) ultra-wide input rangeno minimum load required3KVdc I/O isolation

SKU DCW20W8-12

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Overview

DCW20W8-12 is the ±12V output model of this series: rated power 20W, typical efficiency 87%.

SCW20W8 and DCW20W8 series are 20W isolated and regulated module type DC-DC converter with DIP24 package. It features international standard pins, a high efficiency up to 88%, wide working temperature range -40~+95℃, 3KVdc I/P-O/P isolation voltage, Compliance to BS EN/EN55032 radiated Class A without additional components, continuous-mode short circuit protection, 8:1(9~75V) ultra-wide input range, and various output voltage, 3.3V/5V/12V/15V/24V for single output and ±12V/±15V for dual outputs, which are suitable for all kinds of systems, such as industrial control, telecommunication field, distributed power architecture, and so on.

Features

DIP24 package with industry standard pinout
8:1(9~75Vdc) ultra-wide input range
Operating temperature range -40 ~ +95℃
No minimum load required
Comply to BS EN/EN55032 radiated Class A without additional components
High efficiency up to 88%
Protections: Short circuit (Continuous) / Overload / Over voltage / UVLO
Remote ON/OFF control
3KVdc I/O isolation
3 years warranty

Specifications

DCW20W8-12Specifications from the official datasheet (2025-08-21 edition)

MODEL SELECTION TABLE

INPUT VOLTAGE (RANGE): Nominal 12V, 24V,36V,48V,72V (9 ~ 75V)
INPUT CURRENT NO LOAD: 10mA
INPUT CURRENT FULL LOAD: 958mA
OUTPUT VOLTAGE: ±12V
OUTPUT CURRENT: ±833mA
EFFICIENCY (TYP.): 87%
CAPACITOR LOAD (MAX.)^{* For each output}: *100μF

INPUT

VOLTAGE RANGE: 9~75Vdc
SURGE VOLTAGE (100ms max.): 100Vdc
FILTER: Pi type
PROTECTION (Typ.): 6A Slow-Blow Type

OUTPUT

VOLTAGE ACCURACY: ±2%
RATED POWER: 20W
RIPPLE & NOISE^Note.2: 100mVp-p for 3.3~5V output ; 12~24V for 1% output Vp-p max.
LINE REGULATION^Note.3: ±0.5% for other output, ±1% for 3.3Vo output
LOAD REGULATION^Note.4: ±0.5%
CROSS DEGUIATION: ±5% @ 25%~100% Load only for dual output
SWITCHING FREQUENCY (Typ.): 200KHz

PROTECTION

SHORT CIRCUIT: Protection type : Continuous, automatic recovery
OVERLOAD: 110 ~ 190% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: Protection type : Clamp by TVS diode
UNDER VOLTAGE LOCKOUT (Typ.): Start-up voltage 8.8Vdc Shutdown voltage 8Vdc

FUNCTION

REMOTE CONTROL: Power ON: R.C. ~ -Vin >2.5~30Vdc or open circuit ; Power OFF: R.C. ~ -Vin <1Vdc or short

ENVIRONMENT

COOLING: Free-air convection
WORKING TEMP.: -40 ~ +95℃ (Refer to "Derating Curve")
CASE TEMPERATURE: +110℃ max.
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +125℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.05% / ℃ max. (0 ~ 95℃)
SOLDERING TEMPERATURE: 1.5mm from case of 3 ~ 5sec./260℃ max.
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC (Note.5)

SAFETY STANDARDS: EAC TP TC 020/2011 approved
WITHSTAND VOLTAGE: I/P-O/P:3KVdc
ISOLATION RESISTANCE: I/P-O/P:1000M Ohms / 500Vdc / 25℃/ 70% RH
ISOLATION CAPACITANCE (Typ.): 1000pF
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032 N/A
Radiated BS EN/EN55032 Class A without additional components Class B with additional components
EMC IMMUNITY: Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 2, ±4KV contact
Radiated Susceptibility BS EN/EN61000-4-3 Level 2, 3V/m
EFT/Bursts BS EN/EN61000-4-4 Level 2, 0.5KV
Surge BS EN/EN61000-4-5 Level 1, 0.5KV Line-Line
Conducted BS EN/EN61000-4-6 Level 2, 3V(e.m.f.)
Magnetic field immunity BS EN/EN61000-4-8 Level 1, 1A/m

Parameter	Standard	Test Level
Conducted	BS EN/EN55032	N/A
Radiated	BS EN/EN55032	Class A without additional components Class B with additional components

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 2, ±4KV contact
Radiated Susceptibility	BS EN/EN61000-4-3	Level 2, 3V/m
EFT/Bursts	BS EN/EN61000-4-4	Level 2, 0.5KV
Surge	BS EN/EN61000-4-5	Level 1, 0.5KV Line-Line
Conducted	BS EN/EN61000-4-6	Level 2, 3V(e.m.f.)
Magnetic field immunity	BS EN/EN61000-4-8	Level 1, 1A/m

OTHERS

MTBF (Typ.): >570Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): 31.8*20.3*12.2mm (1.25*0.8*0.48 inch)
CASE MATERIAL: Five-side Metal shielded case
PACKING: 20g ; 15pcs/per tube, 750pcs/50 tube/per carton

Test conditions and notes5

1.All parameters are specified at normal input (24Vdc), 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.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

DCW20W8-12 DIMENSION (L*W*H) 31.8*20.3*12.2mm — DIMENSION (L*W*H) 31.8*20.3*12.2mm

DCW20W8-12 Derating Curve — Derating Curve

DCW20W8-12 Pin Assignment — Pin Assignment

Typical applications

Downloads

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

What is the input voltage range for the Mean Well DCW20W8-12?

The DCW20W8-12 accepts a very wide 9 to 75V DC input range. That 8:1 range makes this model suitable for systems where the DC source can vary across nominal 12V, 24V, 36V, 48V, or 72V inputs.

What output does the DCW20W8-12 provide?

This model provides dual ±12V DC outputs with a 20W power rating. It is designed for applications that need an isolated bipolar DC output from a wide-range DC input source.

Where is the DCW20W8-12 typically used?

The DCW20W8-12 is generally selected for industrial and embedded equipment that needs compact, isolated DC-DC conversion with dual output rails. Its ultra-wide input range and DIP package format make it a practical option for OEM designs, control electronics, and other space-constrained DC power applications.

Is the DCW20W8-12 suitable for harsh temperature environments?

Yes, this converter is rated for operation from -40 to +95 degrees C, subject to the manufacturer's derating guidance. That range makes it better suited than many standard converters for demanding industrial temperature conditions.

What protection and isolation features does the DCW20W8-12 include?

The DCW20W8-12 includes short circuit, overload, over voltage, and under voltage lockout protection. It also provides 3KVdc input-to-output isolation, which is an important specification for designs needing electrical separation between input and output sides.

Payment & Security

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Mean Well DCWN06W8-12 DC-DC Converter - 6W 9~75V DC in ±12V out 250mA	6W	12V	0 Milliampere	IP20	View
Mean Well DCWN06W8-05 DC-DC Converter - 6W 9~75V DC in ±5V out 600mA	6W	5V	0 Milliampere	IP20	View
Mean Well DCWN03W8-15 DC-DC Converter - 3W 9~75V DC in ±15V out 100mA	3W	15V	0 Milliampere	IP20	View
Mean Well DCWN03W8-12 DC-DC Converter - 3W 9~75V DC in ±12V out 125mA	3W	12V	0 Milliampere	IP20	View
Mean Well DCWN03W8-05 DC-DC Converter - 3W 9~75V DC in ±5V out 300mA	3W	5V	0 Milliampere	IP20	View
Mean Well DCWN06C-15 DC-DC Converter - 6W 36~72V DC in 15V out 400mA	6W	15V	0.4A	IP20	View
Mean Well DCWN06C-12 DC-DC Converter - 6W 36~72V DC in 12V out 500mA	6W	12V	0.5A	IP20	View
Mean Well DCWN06C-05 DC-DC Converter - 6W 36~72V DC in 5V out 1.2A	6W	5V	1.2A	IP20	View
Mean Well DCWN06B-15 DC-DC Converter - 6W 18~36V DC in 15V out 400mA	6W	15V	0.4A	IP20	View
Mean Well DCWN06B-12 DC-DC Converter - 6W 18~36V DC in 12V out 500mA	6W	12V	0.5A	IP20	View
Mean Well DCWN06B-05 DC-DC Converter - 6W 18~36V DC in 5V out 1.2A	6W	5V	1.2A	IP20	View
Mean Well DCWN06A-15 DC-DC Converter - 6W 9~18V DC in 15V out 400mA	6W	15V	0.4A	IP20	View
Mean Well DCWN06A-12 DC-DC Converter - 6W 9~18V DC in 12V out 500mA	6W	12V	0.5A	IP20	View
Mean Well DCWN06A-05 DC-DC Converter - 6W 9~18V DC in 5V out 1.2A	6W	5V	1.2A	IP20	View
Mean Well DCWN03E-15 DC-DC Converter - 3W 4.5~9V DC in 15V out 200mA	3W	15V	0.2A	IP20	View
Mean Well DCWN03E-12 DC-DC Converter - 3W 4.5~9V DC in 12V out 250mA	3W	12V	0.25A	IP20	View
Mean Well DCWN03E-05 DC-DC Converter - 3W 4.5~9V DC in 5V out 600mA	3W	5V	0.6A	IP20	View
Mean Well DCWN03C-15 DC-DC Converter - 3W 36~72V DC in 15V out 200mA	3W	15V	0.2A	IP20	View
Mean Well DCWN03C-12 DC-DC Converter - 3W 36~72V DC in 12V out 250mA	3W	12V	0.25A	IP20	View
Mean Well DCWN03C-05 DC-DC Converter - 3W 36~72V DC in 5V out 600mA	3W	5V	0.6A	IP20	View
Mean Well DCWN03B-15 DC-DC Converter - 3W 18~36V DC in 15V out 200mA	3W	15V	0.2A	IP20	View
Mean Well DCWN03B-12 DC-DC Converter - 3W 18~36V DC in 12V out 250mA	3W	12V	0.25A	IP20	View
Mean Well DCWN03B-05 DC-DC Converter - 3W 18~36V DC in 5V out 600mA	3W	5V	0.6A	IP20	View
Mean Well DCWN03A-15 DC-DC Converter - 3W 9~18V DC in 15V out 200mA	3W	15V	0.2A	IP20	View
Mean Well DCWN03A-12 DC-DC Converter - 3W 9~18V DC in 12V out 250mA	3W	12V	0.25A	IP20	View
Mean Well DCWN03A-05 DC-DC Converter - 3W 9~18V DC in 5V out 600mA	3W	5V	0.6A	IP20	View

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