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Mean Well RSDW20G-12 DC-DC Converter - 20W - 18~75V in 12V out 1.67A
Mean Well RSDW20G-12 DC-DC Converter - 20W - 18~75V in 12V out 1.67A
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RSDW20G-12 is the 12V output model of this series: rated power 20W, typical efficiency 90%.
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 48V (18 ~ 75V)
- INPUT CURRENT NO LOAD
- 25mA
- INPUT CURRENT FULL LOAD
- 465mA
- OUTPUT VOLTAGE
- 12V
- OUTPUT CURRENT
- 1670mA
- EFFICIENCY (Typ.)
- 90%
- CAPACITOR LOAD (MAX.)* For each output
- 1800μF
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 & 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
Datasheet1
Certificates3
FAQ
Can I use the RSDW20G-12 for 12V automation and control devices?
Yes, it delivers a constant 12V output rated at up to 1.67A, with 20W total output power. It is suitable for 12V automation, control, and embedded devices that stay within those output limits.
Is the RSDW20G-12 a fit for converting a wide industrial input range to 12V?
Yes, the converter accepts 18-75Vdc input and provides a regulated 12V output. That makes it useful for industrial or embedded systems that need a 12V rail from a source within that input range.
Can this model be used in railway or transit electronics that require 12V power?
It is intended for rugged transport-related use because the datasheet lists compliance with the EN50155 railway standard, including EN61373 for shock and vibration and EN50121-3-2 for EMC. The -40°C to +85°C operating temperature and 1.5KVDC input-to-output isolation further support use in demanding electronic environments.
Is the RSDW20G-12 suitable for compact embedded equipment with limited mounting space?
Yes, the unit measures 50.8 × 25.4 × 10.2 mm and weighs 0.035 kg, which helps in compact enclosures. Its 2" × 1" package with a 10.2 mm height is also relevant for dense industrial and embedded layouts.
What are the output differences between the RSDW20G-12 and its sibling models?
Each listed RSDW20G version is rated at 20W, but the voltage and current combinations are different. The RSDW20G-03 is 3.3V at 5.5A, the RSDW20G-05 is 5V at 4A, the RSDW20G-12 is 12V at 1.67A, and the RSDW20G-15 is 15V at 1.33A.
Can the RSDW20G-12 be used where temperatures swing widely?
The specified operating range is -40°C to +85°C, so it is rated for very cold and hot conditions. No IP rating is included in the provided specifications, so ingress protection for outdoor exposure is not stated here.
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