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Mean Well SCW08W8-09 DC-DC Converter - 8W 9~75V DC in 9V out 889mA

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

SKU SCW08W8-09

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Overview

SCW08W8-09 is the 9V output model of this series: rated power 8W, typical efficiency 85%.

SCW08W8 and DCW08W8 series are 8W isolated and regulated module type DC-DC converter with DIP24 package. It features international standard pins, a high efficiency up to 86%, wide working temperature range -40~+90℃, 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/9V/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 ~ +90℃
No minimum load required
Comply to BS EN/EN55032 radiated Class A without additional components
High efficiency up to 86%
Protections: Short circuit (Continuous) / Overload / Over voltage / UVLO
Remote ON/OFF control (Optional)
3KVdc I/O isolation
3 years warranty

Specifications

SCW08W8-09Specifications from the official datasheet (2025-07-17 edition)Download datasheet PDF

MODEL SELECTION TABLE

INPUT VOLTAGE (RANGE): Nominal 12V, 24V,36V,48V,72V (9 ~ 75V)
INPUT CURRENT NO LOAD: 10mA
INPUT CURRENT FULL LOAD: 392mA
OUTPUT VOLTAGE: 9V
OUTPUT CURRENT: 889mA
EFFICIENCY (TYP.): 85%
CAPACITOR LOAD (MAX.)^{* For each output}: 680μF

INPUT

VOLTAGE RANGE: 9~75Vdc
SURGE VOLTAGE (100ms max.): 100Vdc
FILTER: Pi type
PROTECTION (Typ.): Fuse recommended. 3A Slow-Blow Type

OUTPUT

VOLTAGE ACCURACY: ±2%
RATED POWER: 8W
RIPPLE & NOISE^Note.2: 100mVp-p
LINE REGULATION^Note.3: ±0.5%
LOAD REGULATION^Note.4: ±1% for 3.3Vo, ±0.5% for others
CROSS DEGUIATION: ±5% @ 25%~100% Load only for dual output
SWITCHING FREQUENCY (Typ.): 300KHz

PROTECTION

SHORT CIRCUIT: Protection type : Continuous, automatic recovery
OVERLOAD: 200 ~ 300% 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
UNDER VOLTAGE LOCKOUT (Typ.) Shutdown voltage: 8Vdc

ENVIRONMENT

COOLING: Free-air convection
WORKING TEMP.: -40 ~ +90℃ (Refer to "Derating Curve")
CASE TEMPERATURE: +110℃ max.
WORKING HUMIDITY: 5% ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -55 ~ +125℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: 0.05% / ℃ (0 ~ 85℃)
SOLDERING TEMPERATURE: 1.5mm from case of 3 ~ 5sec./265℃ 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, ±8KV air, ±4KV contact
Radiated Susceptibility BS EN/EN61000-4-3 Level 2, 3V/m
EFT/Bursts BS EN/EN61000-4-4 Level 1, 0.5KV
Surge BS EN/EN61000-4-5 Level 2, 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, ±8KV air, ±4KV contact
Radiated Susceptibility	BS EN/EN61000-4-3	Level 2, 3V/m
EFT/Bursts	BS EN/EN61000-4-4	Level 1, 0.5KV
Surge	BS EN/EN61000-4-5	Level 2, 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.): >860Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): 31.8*20.3*12.2mm (1.25*0.8*0.48 inch)
CASE MATERIAL: Non-Conductive black plastic (UL 94V-0 rated)
PACKING: 17.5g ; 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

SCW08W8-09 DIMENSION (L*W*H) 31.8*20.3*12.2mm — DIMENSION (L*W*H) 31.8*20.3*12.2mm

SCW08W8-09 Derating Curve — Derating Curve

SCW08W8-09 Pin Assignment — Pin Assignment

Typical applications

Downloads

Datasheet1

SCW08W8-09 datasheetSCW08W8_DCW08W8_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 SCW08W8-09 designed for?

The SCW08W8-09 is an 8W isolated DC-DC converter intended for equipment that needs a regulated 9V DC output from a very wide DC source range. Its 9-75V DC input range makes it suitable for industrial, embedded, and mobile-powered systems where input voltage can vary significantly. It is positioned as a compact module for B2B equipment integration rather than a consumer plug-in power supply.

What input voltage range does the SCW08W8-09 support?

This model accepts 9V to 75V DC input, which Mean Well describes as an 8:1 ultra-wide input range. That allows one converter model to cover multiple nominal DC bus levels, including 12V, 24V, 36V, 48V, and 72V systems. For buyers standardizing across mixed DC platforms, that wide range is one of the main differentiators of this unit.

Is the SCW08W8-09 suitable for harsh temperature environments?

Yes. This model is specified for operation from -40°C to +90°C (refer to the derating curve), which supports use in demanding industrial temperature conditions. Buyers should still validate the full equipment thermal design, but the converter itself is rated for a wide operating range.

What protection and isolation features does the SCW08W8-09 include?

The SCW08W8-09 includes short circuit protection with continuous behavior, plus overload, over-voltage, and UVLO protection. It also provides 3KVdc input-to-output isolation. Those features make it better suited to electrically noisy or protection-sensitive equipment than a basic non-isolated converter.

How does the SCW08W8-09 compare with a fixed-input DC-DC converter?

Compared with a fixed-input converter, the SCW08W8-09 is designed for much greater input flexibility because it accepts 9-75V DC instead of a narrow nominal range. It also uses a compact DIP package and offers a typical efficiency of 85%. For OEMs managing several DC bus voltages, that can reduce the need to qualify multiple converter variants.

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