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Mean Well RDDW20F-05 DC-DC Converter - 20W - 9~36V in ±5V out 2A
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RDDW20F-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
MODEL SELECTION TABLE
- INPUT VOLTAGE (RANGE)
- Normal 24V (9 ~ 36V)
- INPUT CURRENT NO LOAD
- 70mA
- INPUT CURRENT FULL LOAD
- 945mA
- OUTPUT VOLTAGE
- ±5V
- OUTPUT CURRENT
- ±0 ~ 2000mA
- EFFICIENCY (Typ.)
- 89%
- CAPACITOR LOAD (MAX.)* For each output
- *2000μF
INPUT
- VOLTAGE RANGE
- 9~36Vdc ,
- 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 & NOISENote.2
- 60mVp-p
- LINE REGULATIONNote.3
- ±0.2%
- LOAD REGULATIONNote.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
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
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
FAQ
Can I use the RDDW20F-05 to generate ±5V rails for embedded control boards in a 12V or 24V system?
Yes, this model is intended for constant-voltage conversion from a 9-36VDC input to a ±5V output. Its 20W rating and 2A output make it a fit for compact embedded or industrial control electronics that need regulated ±5V rails within that power limit.
Is the RDDW20F-05 suitable for industrial sensor and interface circuits that need dual 5V output?
It can be a good fit where the equipment requires a dual ±5V constant-voltage supply and the total load stays within 20W. The miniature 50.8 × 25.4 × 10.2 mm package also makes it easier to place in dense embedded or automation assemblies.
Can this DC-DC converter be used in vibration-prone mobile or machine-mounted electronics?
The series is compliant with the EN50155 railway standard, including EN61373 for shock and vibration, which makes it more appropriate for equipment exposed to movement than a basic enclosed board-level supply. It is still a 20W dual-output converter, so the application needs to match the ±5V output and 2A rating.
Is the RDDW20F-05 suitable for outdoor or harsh-temperature installations?
The specified operating temperature range is -40°C to +85°C, so it supports very wide temperature conditions. No IP rating is listed in the provided specs, so it is better treated as a converter for protected enclosures rather than exposed outdoor mounting.
How does the RDDW20F-05 compare with the other RDDW20F models?
All three RDDW20F models share 20W power, 9-36VDC input, constant-voltage operation, 50.8 × 25.4 × 10.2 mm dimensions, 35g weight, and a -40°C to +85°C operating range. The difference is output: RDDW20F-05 is ±5V at 2A, RDDW20F-12 is ±12V at 835mA, and RDDW20F-15 is ±15V at 666mA.
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