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Mean Well RDDW20G-05 DC-DC Converter - 20W - 18~75V in ±5V out 2A

miniature sizeeconomicalwithstand 5G vibration and 70°C operationdual output

SKU RDDW20G-05

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Overview

RDDW20G-05 is the ±5V output model of this series: rated power 20W, typical efficiency 89%.

RSDW20 and RDDW20 series are 20W module type DC-DC reliable railway converter with 2"x1" package. It features international standard pins, a high efficiency up to 90%, wide working temperature range -40~+85℃, 1.5KVDC(F/G models)/3KVDC(H models) I/P-O/P isolation voltage, compliance with EN50155 railway standard, continuous-mode short circuit protection, etc. The models account for different input voltage 9~36V, 18~75V and 43~160V 4:1 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 railway, trams, buses and also can be used in the harsh environment with high vibration, high dust, extremely low or high temperature, etc.

Features

Compliance with EN50155 railway standard
DIP 2"x1" package with standard pinout
4:1 wide input range
Wide operating temperature range -40 ~ +85℃
No minimum load required
Full encapsulated
Protections: Short circuit (Continuous) / Overload / Over voltage / Input under voltage
1.5KVDC,3KVDC I/O isolation by models
Remote ON/OFF control
3 years warranty

Specifications

RDDW20G-05Specifications from the official datasheet (2024-11-18 edition)

MODEL SELECTION TABLE

INPUT VOLTAGE (RANGE): Normal 48V (18 ~ 75V)
INPUT CURRENT NO LOAD: 45mA
INPUT CURRENT FULL LOAD: 468mA
OUTPUT VOLTAGE: ±5V
OUTPUT CURRENT: ±0 ~ 2000mA
EFFICIENCY (Typ.): 89%
CAPACITOR LOAD (MAX.)^{* For each output}: *2000μF

INPUT

VOLTAGE RANGE: 18~75Vdc ,
SURGE VOLTAGE (100ms max.): 24Vin models : 50Vdc, 48Vin models : 100Vdc, 110Vin models : 200Vdc
FILTER: Pi type
PROTECTION: Fuse recommended. 24Vin models: 4A delay time Type, 48Vin models: 2A delay time Type, 110Vin models: 0.8A delay time Type

OUTPUT

VOLTAGE ACCURACY: ±1.5%
RATED POWER: 20W
RIPPLE & NOISE^Note.2: 60mVp-p
LINE REGULATION^Note.3: ±0.2%
LOAD REGULATION^Note.4: Single output models: ±0.5%, Dual output models:±1%
CROSS REGULATION: ±5% @ 25%~100% load
SWITCHING FREQUENCY (Typ.): F/G: Single output 350KHz, Dual output 400KHz H: 250KHz
EXTERNAL TRIM ADJ. RANGE (Typ.): ±10% (Single output model only)

PROTECTION

SHORT CIRCUIT: Protection type : Continuous, automatic recovery
OVERLOAD: 110 ~ 160% rated output power Protection type : Recovers automatically after fault condition is removed
OVER VOLTAGE: Protection type : Clamp by diode
UNDER VOLTAGE LOCKOUT Start-up voltage: 24Vin: 8.8Vdc, 48Vin: 17Vdc, 110Vin: 40Vdc
UNDER VOLTAGE LOCKOUT Shutdown voltage: 24Vin: 8Vdc, 48Vin: 16Vdc, 110Vin: 38Vdc

FUNCTION

REMOTE CONTROL: Power ON: >5.5~75Vdc or open circuit (F/G models) ; >3.5~75Vdc or open circuit (H models) Power OFF: <1.2Vdc or short (F/G/H models)

ENVIRONMENT

COOLING: Free-air convection
WORKING TEMP.: -40 ~ +85℃ (Refer to "Derating Curve")
CASE TEMPERATURE: +105℃ max.
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -55 ~ +125℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: 0.03% / ℃ (0 ~ 71℃)
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(EAC TP TC 004 for 48Vin/110Vin type only) approved
WITHSTAND VOLTAGE: F/G: I/P-O/P 1.5KVDC, H: I/P-O/P 3KVDC
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
ISOLATION CAPACITANCE (Typ.): 1000pF
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032 Class B with external components
Radiated BS EN/EN55032 Class B with external 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 1, 0.5KV Line-Line
Conducted BS EN/EN61000-4-6 Level 2, 3V(e.m.f.)
RAILWAY STANDARD: EN50155 including EN61373 for shock & vibration, EN50121-3-2 for EMC

Parameter	Standard	Test Level
Conducted	BS EN/EN55032	Class B with external components
Radiated	BS EN/EN55032	Class B with external 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 1, 0.5KV Line-Line
Conducted	BS EN/EN61000-4-6	Level 2, 3V(e.m.f.)

OTHERS

MTBF: F/G: 720Khrs ; H: 880Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): 50.8*25.4*10.2mm (2*1*0.4 inch)
CASE MATERIAL: Black coated copper with Non-Conductive Base
PACKING: 35g ; 12pcs/per tube, 300pcs/25 tube/per carton

Test conditions and notes5

1.All parameters are specified at normal input(F:24Vdc, G:48Vdc, H:110Vdc), 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

RDDW20G-05 Mechanical Specification — Mechanical Specification

RDDW20G-05 Derating Curve — Derating Curve

RDDW20G-05 H models(43~160Vin) — H models(43~160Vin)

RDDW20G-05 ※Required external componets to meet BS… — ※Required external componets to meet BS…

Typical applications

Bus, tram, metro or railway system
Telecom/datacom system
Wireless network
Industrial control facility
Instrument
Analyzer
Highly vibrating, heavily dusty, extremely low or high temperature harsh environment

Downloads

Certificates3

Mean Well RSDW20-RDDW20-EMC Certificate PDF Download

Mean Well RSDW20-RDDW20-CE-dec Certificate PDF Download

Mean Well RSDW20-RDDW20-UK-dec Certificate PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the RDDW20G-05 to generate ±5V rails from a 24V, 48V, or 72V DC bus in industrial equipment?

Yes, the key advantage of this model is its wide 18-75VDC input range paired with a constant ±5V output. That makes it suitable for embedded and automation electronics fed from higher-voltage bus systems, as long as the load stays within 20W and 2A.

Is the RDDW20G-05 a good fit for telecom, transport, or distributed control electronics that run from a wide-input power rail?

It is better aligned with those environments than the narrower-input RDDW20F version because it accepts 18-75VDC. The ±5V output and 20W rating suit lower-power logic, interface, and control sections that need regulated dual rails.

Can this converter be used in compact embedded hardware where board space and weight matter?

Yes, the converter is small at 50.8 × 25.4 × 10.2 mm and light at 0.035 kg, which helps in compact industrial and embedded designs. It is still a 20W constant-voltage model with ±5V output, so the application must match those limits.

Is the RDDW20G-05 suitable for outdoor cabinets or wide-temperature field enclosures?

The operating temperature range is -40°C to +85°C, which supports use in equipment exposed to wide ambient swings. No IP rating is listed, so the specs support installation inside a protected enclosure rather than unprotected outdoor exposure.

What are the differences between the RDDW20G-05, RDDW20G-12, and RDDW20G-15?

All RDDW20G models share 20W power, 18-75VDC input, constant-voltage operation, 50.8 × 25.4 × 10.2 mm dimensions, 0.035 kg weight, and a -40°C to +85°C operating range. The outputs differ by model: RDDW20G-05 is ±5V at 2A, RDDW20G-12 is ±12V at 835mA, and RDDW20G-15 is ±15V at 666mA.

Payment & Security

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