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Mean Well RDDW20UW-12 Ultra-wide input DC/DC LED Driver 20W 12 and -12V - Heavy Duty, Dual Output 833mA
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Mean Well RDDW20UW-12 Ultra-wide input DC/DC LED Driver 20W 12 and ...
Overview
RDDW20UW-12 is the ±12V output model of this series: rated power 20W, typical efficiency 88%.
RSDW20UW and RDDW20UW series are 20W module type DC-DC reliable railway converter with 2"x1" package. It features international standard pins, a high efficiency up to 89%, wide working temperature range -40~+95℃, 3KVAC I/P-O/P isolation voltage, meet EN50155 with external circuits, continuous-mode short circuit protection, etc. The models account for 8.5~160VDC 18:1 ultra-wide input range, and various output voltage, 5V/12V/15V for single output and ±12V/±15V/±24V 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 railway standard EN50155
- DIP 2"x1" package with standard pinout
- 18:1(8.5~160Vdc) ultra-wide input range
- Wide operating temperature range -40 ~ +95℃
- No minimum load required
- Full encapsulated
- Protections: Short circuit (Continuous) / Overload / Over Voltage / Input under voltage
- 3KVAC I/O isolation
- Operating altitude up to 5000 meters (Note.5)
- Remote ON/OFF control
- 3 years warranty
Specifications
MODEL SELECTION TABLE
- INPUT VOLTAGE (RANGE)
- Normal 12V,24V,48V,72V,96V,110V (8.5 ~ 160V)
- INPUT CURRENT NO LOAD
- 8mA
- INPUT CURRENT FULL LOAD
- 312mA
- OUTPUT VOLTAGE
- ±12V
- OUTPUT CURRENT
- ±0 ~833mA
- EFFICIENCY (Typ.)
- 88%
- CAPACITOR LOAD (MAX.)* For each output
- *820μF
INPUT
- VOLTAGE RANGE
- 8.5 ~ 160Vdc
- SURGE VOLTAGE (100ms max.)
- 200Vdc
- FILTER
- Pi type
- PROTECTION
- 4A fast acting fuse
OUTPUT
- VOLTAGE ACCURACY
- ±1.0%
- RATED POWER
- 20W
- RIPPLE & NOISENote.2
- 100mVp-p
- LINE REGULATIONNote.3
- ±0.2%
- LOAD REGULATIONNote.4
- Single output models: ±0.3%, Dual output models:±1%
- CROSS REGULATION
- ±5% @ 25%~100% load
- SWITCHING FREQUENCY (Typ.)
- 200KHz
- EXTERNAL TRIM ADJ. RANGE (Typ.)
- -20% ~ +15% (Single output model only)
PROTECTION
- SHORT CIRCUIT
- Protection type : Continuous, automatic recovery
- OVERLOAD
- 110 ~ 180% 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
- 9Vdc
- UNDER VOLTAGE LOCKOUT Shutdown voltage
- 8Vdc
FUNCTION
- REMOTE CONTROL
- Power ON: >4.0~160Vdc or open circuit Power OFF: <1.2Vdc or short
ENVIRONMENT
- COOLING
- Free-air convection
- WORKING TEMP.
- -40 ~ +95℃ (Refer to "Derating Curve")
- CASE TEMPERATURE
- +105℃ max. (+110℃ thermal shutdown)
- WORKING HUMIDITY
- 20% ~ 90% RH non-condensing
- STORAGE TEMP., HUMIDITY
- -55 ~ +125℃, 10 ~ 95% RH non-condensing
- TEMP. COEFFICIENT
- 0.03% / ℃ (0 ~ 95℃)
- 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
- OPERATING ALTITUDENote.5
- 5000 meters
SAFETY & EMC ( Note.6)
- SAFETY STANDARDS
- UL62368-1, EAC TP TC 004 approved
- WITHSTAND VOLTAGE
- I/P-O/P:3KVAC
- ISOLATION RESISTANCE
- I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
- ISOLATION CAPACITANCE (Typ.)
- 20pF
- EMC EMISSION
-
Parameter Standard Test Level Conducted BS EN/EN50121-3-2 Class A/B with external components Radiated BS EN/EN50121-3-2 N/A - EMC IMMUNITY
-
Parameter Standard Test Level ESD BS EN/EN61000-4-2 Level 3, ±8KV air, ±6KV contact Radiated Susceptibility BS EN/EN61000-4-3 Level 3, 80~1000MHz, 20V/m EFT/Bursts BS EN/EN61000-4-4 Level 3, On power input port,±2KV external input capacitor required Surge BS EN/EN61000-4-5 Level 4, Line to earth, ±4KV Line to Line, ±2KV Conducted BS EN/EN61000-4-6 Level 3, 0.15~80MHz, 10V - RAILWAY STANDARD
- EN50155 including EN61373 for shock & vibration, EN50121-3-2 for EMC
OTHERS
- MTBF
- 1570Khrs 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 notes6
- 1.All parameters are specified at normal input(72Vdc), 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 ambient temperature derating of 3.5℃/1000m for operating altitude higher than 2000m(6500ft).
- 6.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
Certificates5
FAQ
Can I use the RDDW20UW-12 for ±12V control electronics in equipment with a very wide input range?
Yes. This model provides dual ±12V constant-voltage output with 20W power and an 8.5~160Vdc input range, making it suitable for low-power control and analog electronics in designs with widely varying input conditions. Its ultra-wide input range is a key differentiator in that type of application.
Is the RDDW20UW-12 a fit for embedded industrial electronics that need split rails and compact size?
It can be. The converter offers dual ±12V output in a 50.8 × 25.4 × 10.2 mm package and weighs 35g, which helps in dense embedded assemblies. The 20W rating suits internal electronics with moderate power requirements.
Would this model work for analog measurement or signal-conditioning sections in heavy-duty equipment?
Yes, where the electronics are designed for ±12V constant-voltage rails. The 20W power level is appropriate for low-power analog sections, and the listed 2G vibration capability supports use in heavier-duty equipment.
Can the RDDW20UW-12 handle demanding temperature conditions in protected equipment?
The published operating range is -40°C to +95°C, which is broader than many compact converters. The specs do not list an IP rating, so the temperature capability is strong, but outdoor exposure suitability is not established by the provided data.
How does the RDDW20UW-12 compare with the other RDDW20UW versions?
All listed RDDW20UW models are 20W converters with 8.5~160Vdc input. The RDDW20UW-12 is ±12V at ±833mA, the RDDW20UW-15 is ±15V at ±667mA, and the RDDW20UW-24 is ±24V at ±417mA. The main difference across the series is the output voltage and corresponding output current.
Payment & Security
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Other RDDW20UW Series Models
2 other models| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well RDDW20UW-24 Ultra-wide input DC/DC LED Driver 20W 24 and -24V - Heavy Duty, Dual Output 417mA | 20W | 24V | 0.417A | IP20 | $58.58 | View |
| Mean Well RDDW20UW-15 Ultra-wide input DC/DC LED Driver 20W 15 and -15V - Heavy Duty, Dual Output 667mA | 20W | 15V | 0.667A | IP20 | $58.58 | View |
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