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Mean Well DCWN03W8-05 DC-DC Converter - 3W 9~75V DC in ±5V out 300mA

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

SKU DCWN03W8-05

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Overview

DCWN03W8-05 is the ±5V output model of this series: rated power 3W, typical efficiency 79%.

SCWN03W8 and DCWN03W8 series are 3W isolated and regulated module type DC-DC converter with DIP24 package. It features intermationaional standard pins, a high efficiency up to 84%, wide working temperature range -40~+95℃, 3KVdc I/P-O/P isolation voltage, Compliance to BS EN/EN55032 radiated Class B 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 for single output and ±5V/±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 B without additional components
High efficiency up to 84%
Protections: Short circuit (Continuous) / Overload / Over voltage / UVLO
Remote ON/OFF control (Optional)
3KVdc I/O isolation
3 years warranty

Specifications

DCWN03W8-05Specifications from the official datasheet (2025-07-17 edition)Download datasheet PDF

INPUT

INPUT VOLTAGE (RANGE): Nominal 12V, 24V,36V,48V,72V (9 ~ 75V)
INPUT CURRENT NO LOAD: 7mA
INPUT CURRENT FULL LOAD: 80mA
VOLTAGE RANGE: 9~75Vdc
SURGE VOLTAGE (100ms max.): 100Vdc
FILTER: Pi type
PROTECTION (Typ.): 1A Fast-Acting Type

OUTPUT

OUTPUT VOLTAGE: ±5V
OUTPUT CURRENT: ±300mA
EFFICIENCY (TYP.): 79%
CAPACITOR LOAD (MAX.): *300μF (for each output)
VOLTAGE ACCURACY: ±2% for 3.3Vo, ±1.5% for others
RATED POWER: 3W
RIPPLE & NOISE^Note.2: 100mVp-p
LINE REGULATION^Note.3: ±0.5%
LOAD REGULATION^Note.4: Single output models:±0.5% ; Dual output models:±1.0%
CROSS DEGUIATION: ±5% @ 25%~100% Load only for dual output
SWITCHING FREQUENCY (Typ.): 200KHz

PROTECTION

SHORT CIRCUIT: Protection type : Continuous, automatic recovery
OVERLOAD: 110 ~ 230% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: Protection type : Clamp by zener diode
UNDER VOLTAGE LOCKOUT (Typ.) Start-up voltage: 8.8Vdc
UNDER VOLTAGE LOCKOUT (Typ.) Shutdown voltage: 8Vdc

ENVIRONMENT

COOLING: Free-air convection
WORKING TEMP.: -40 ~ +95℃ (Refer to "Derating Curve")
CASE TEMPERATURE: +115℃ max.
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +125℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.05% / ℃ max. (0 ~ 85℃)
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.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 Class A without additional components Class B with additional components
Radiated BS EN/EN55032 Class B without additional components
EMC IMMUNITY: Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 2, ±8KV air, ±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 2, 1KV Line-Line
Conducted BS EN/EN61000-4-6 Level 2, 3V(e.m.f.)

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

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 2, ±8KV air, ±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 2, 1KV Line-Line
Conducted	BS EN/EN61000-4-6	Level 2, 3V(e.m.f.)

OTHERS

MTBF (Typ.): 2500Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): 31.8*20.3*10.2mm (1.25*0.8*0.4 inch)
CASE MATERIAL: Non-Conductive black plastic (UL 94V-0 rated)
PACKING: 12.5g ; 10pcs/per tube, 600pcs/60 tube/per carton

Test conditions and notes5

1.All parameters are specified at normal input (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.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

DCWN03W8-05 DIMENSION (L*W*H) 31.8*20.3*10.2mm — DIMENSION (L*W*H) 31.8*20.3*10.2mm

DCWN03W8-05 Derating Curve — Derating Curve

DCWN03W8-05 Pin Assignment — Pin Assignment

Typical applications

Downloads

Datasheet1

DCWN03W8-05 datasheetSCWN03W8_DCWN03W8_Spec_Sheet.pdf · 2025-07-17 edition PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

What kind of applications is the Mean Well DCWN03W8-05 suited for?

The DCWN03W8-05 is a 3W isolated DC-DC converter designed for equipment that needs regulated ±5V output from a very wide DC input range. Its 9 to 75V DC input window makes it relevant for industrial, control, and distributed power applications where supply voltage can vary across 12V, 24V, 36V, 48V, or 72V nominal systems.

What input range does the DCWN03W8-05 support?

This model supports an ultra-wide 8:1 input range of 9 to 75V DC. That allows one converter model to cover multiple nominal DC bus voltages, including 12V, 24V, 36V, 48V, and 72V systems.

Does the DCWN03W8-05 provide isolation between input and output?

Yes. The DCWN03W8-05 provides 3KV DC input-to-output isolation, which is an important specification in systems that need electrical separation between the source side and the powered circuitry. This can help in designs where noise isolation or protection between stages is required.

Can the DCWN03W8-05 be used in demanding temperature conditions?

This converter is rated for operation from -40°C to +95°C, subject to the product's derating curve. That wide operating range makes it a stronger fit for industrial environments than products limited to room-temperature use.

What protection features are included in the DCWN03W8-05?

The DCWN03W8-05 includes short circuit, overload, over voltage, and under-voltage lockout protection. Short circuit protection is continuous with automatic recovery, and overload protection operates in hiccup mode with automatic recovery after the fault is removed.

How does the DCWN03W8-05 differ from a narrower-input DC-DC converter?

Its main differentiator is the 9 to 75V DC ultra-wide input range in a compact DIP package. Compared with narrower-input models, it gives more flexibility when the source voltage may vary across different DC systems while still providing 3W output, 79% typical efficiency, and 3KV DC isolation.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
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 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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