Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well DCWN03W8-12 DC-DC Converter - 3W 9~75V DC in ±12V out 125mA

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

SKU DCWN03W8-12

Log in to see price Trade pricing & online ordering for account holders

Available to order

Overview

DCWN03W8-12 is the ±12V output model of this series: rated power 3W, typical efficiency 84%.

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

DCWN03W8-12Specifications 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: 9mA
INPUT CURRENT FULL LOAD: 75mA
VOLTAGE RANGE: 9~75Vdc
SURGE VOLTAGE (100ms max.): 100Vdc
FILTER: Pi type
PROTECTION (Typ.): 1A Fast-Acting Type

OUTPUT

OUTPUT VOLTAGE: ±12V
OUTPUT CURRENT: ±125mA
EFFICIENCY (TYP.): 84%
CAPACITOR LOAD (MAX.): *250μF (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

DCWN03W8-12 DIMENSION (L*W*H) 31.8*20.3*10.2mm — DIMENSION (L*W*H) 31.8*20.3*10.2mm

DCWN03W8-12 Derating Curve — Derating Curve

DCWN03W8-12 Pin Assignment — Pin Assignment

Typical applications

Downloads

Datasheet1

DCWN03W8-12 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 applications is the Mean Well DCWN03W8-12 designed for?

The DCWN03W8-12 is a 3W isolated DC-DC converter module suited to embedded and industrial electronics that need regulated DC conversion from a very wide input range. Its DIP package, 3KVdc isolation, and broad 9 to 75V DC input range make it useful in systems with varying DC bus voltages.

What input voltage range does the DCWN03W8-12 support?

This model supports an ultra-wide 8:1 input range of 9 to 75V DC. The specification lists nominal use across 12V, 24V, 36V, 48V, and 72V DC systems within that range.

What output does the DCWN03W8-12 provide?

The DCWN03W8-12 provides a ±12V DC output and is rated for 3W total power. It is intended for applications that need isolated dual-voltage DC output from a wide-range DC source.

Is this DC-DC converter suitable for harsh temperature environments?

Yes. The rated operating temperature range is -40°C to +95°C, with load derating at higher temperatures per the derating curve, which supports use in demanding industrial environments where ambient conditions can vary significantly.

What protection features are included in the DCWN03W8-12?

This model includes short circuit protection with continuous automatic recovery, overload protection, over voltage protection, and under voltage lockout. The overload protection operates in hiccup mode and recovers automatically after the fault is removed.

How does the DCWN03W8-12 compare with narrower-input DC-DC modules?

A key difference is its 8:1 ultra-wide 9 to 75V DC input range, which gives it more flexibility than converters built for only one narrow input band. It also offers 84% typical efficiency and 3KVdc input-to-output isolation in a compact DIP package.

What compliance and physical format details should buyers know?

The DCWN03W8-12 uses a DIP package and measures 31.8 x 20.3 x 10.2mm. It is approved to EAC TP TC 020/2011 and is specified to comply with BS EN/EN55032 radiated Class B without additional components.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

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

Please log in to write a review.

{ "id":14812938764654, "variants" :[{ "context":"default", "variant_id": 52705268138350, "sku":"DCWN03W8-12", "inventory_qty" : 0, "customer" :false, "custom_html" :"\u003ca class=\"text-current logged-out-price logged-out\" href=\"https:\/\/wellforces.co.nz\/customer_authentication\/redirect?locale=en\u0026region_country=NZ\"\u003e\n \u003cspan \u003ePlease \u003c\/span\u003e \u003cspan class=\"login-text\"\u003eLogin\u003c\/span\u003e \u003cspan\u003e for Pricing\u003c\/span\u003e\n \u003c\/a\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }