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Mean Well RDDW08F-05 DC-DC Converter - 8W - 3~36V in ±5V out 800mA
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RDDW08F-05 is the ±5V output model of this series: rated power 8W, typical efficiency 82%.
RSDW08 and RDDW08 series are 8W module type DC-DC reliable railway converter with DIP24 package. It features inter-national standard pins, a high efficiency up to 86%, wide working temperature range -40~+85℃, 1.5KVDC 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 and 18~75V 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 24 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 I/O isolation
- Remote ON/OFF control
- 3 years warranty
Specifications
INPUT
- INPUT VOLTAGE (RANGE)
- Normal 24V (9 ~ 36V)
- INPUT CURRENT NO LOAD
- 10mA
- INPUT CURRENT FULL LOAD
- 406mA
- VOLTAGE RANGE
- 9~36Vdc ,
- SURGE VOLTAGE (100ms max.)
- 24Vin models : 50Vdc, 48Vin models : 100Vdc
- FILTER
- Pi type
- PROTECTION (Typ.)
- Fuse recommended. 24Vin models: 3A delay time Type, 48Vin models: 1.5A delay time Type
- INTERNAL POWER DISSIPATION
- 500mW
OUTPUT
- OUTPUT VOLTAGE
- ±5V
- OUTPUT CURRENT
- ±0 ~ 800mA
- EFFICIENCY (Typ.)
- 82%
- CAPACITOR LOAD (MAX.)
- 800μF (each output)
- VOLTAGE ACCURACY
- ±1.5%
- RATED POWER
- 8W
- RIPPLE & NOISENote.2
- 50mVp-p
- LINE REGULATIONNote.3
- ±0.5%
- LOAD REGULATIONNote.4
- Single output models: ±0.5%, Dual output models:±1%
- CROSS REGULATION
- ±5% @ 25%~100% load
- SWITCHING FREQUENCY (min.)
- 100KHz
PROTECTION
- SHORT CIRCUIT
- Protection type : Continuous, automatic recovery
- OVERLOAD
- 120 ~ 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
- 24Vin: 8.8Vdc, 48Vin: 17Vdc
- UNDER VOLTAGE LOCKOUT Shutdown voltage
- 24Vin: 8Vdc, 48Vin: 16Vdc
FUNCTION
- REMOTE CONTROL
- Power ON: R.C. ~ -Vin >3.5~36Vdc or open circuit ; Power OFF: R.C. ~ -Vin <1.2Vdc or short
ENVIRONMENT
- COOLING
- Free-air convection
- WORKING TEMP.
- -40 ~ +85℃ (Refer to "Derating Curve")
- CASE TEMPERATURE
- +100℃ 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; Mounting: compliance to EN61373(Category 1- Class B)
SAFETY & EMC ( Note.5)
- SAFETY STANDARDS
- EAC TP TC 020/2011(EAC TP TC 004 for 48Vin type only) approved
- WITHSTAND VOLTAGE
- I/P-O/P:1.5KVDC
- 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 A/B with external components Radiated BS EN/EN55032 N/A - 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
- Single: 1500Khrs, Dual: 1300Khrs MIL-HDBK-217F(25℃)
- DIMENSION (L*W*H)
- 31.8*20.3*10.2mm (1.25*0.8*0.4 inch)
- CASE MATERIAL
- Black coated copper with non-conductive base
- PACKING
- 18.4g ; 10pcs/per tube, 700pcs/70 tube/per carton
Test conditions and notes5
- 1.All parameters are specified at normal input(F:24Vdc, G:48Vdc), 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 10% 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
Certificates3
Test reports1
FAQ
Can I use the RDDW08F-05 to generate ±5V rails for signal-conditioning or analog interface circuits?
Yes, this model is aimed at low-power constant voltage conversion where a ±5V output is needed from a 9-36V input range. With an 8W power rating, it is better suited to signal-conditioning, interface, and low-power embedded electronics than to larger control loads.
Is the RDDW08F-05 suitable for embedded systems that need isolated low-power ±5V conversion in a compact space?
Its dimensions are 31.8 × 20.3 × 10.2 mm and its weight is 0.0184 kg, so it is well suited to compact embedded designs where board or enclosure space is tight. The 8W rating keeps it in the low-power class, which matches many embedded support circuits.
Can the RDDW08F-05 be used in industrial electronics that have varying low-voltage input sources?
It is designed for a 9-36V input range, which gives it more flexibility than a narrow-input converter in low-voltage industrial electronics. That makes it a practical choice when the source voltage is not fixed at one level but the load still needs constant ±5V output.
Would the RDDW08F-05 work for automation I/O or instrumentation circuits that need ±5V support power?
It can be a fit for low-power automation I/O or instrumentation support circuits that need a constant ±5V output rather than a higher-voltage rail. The 8W ceiling means it is better for supporting electronics and interfaces than for powering larger field devices.
How does the RDDW08F-05 compare with the other RDDW08F output options?
All three listed RDDW08F versions are 8W converters with the same 9-36V input range, 31.8 × 20.3 × 10.2 mm dimensions, and 18.4g weight. The difference is output: RDDW08F-05 is ±5V and ±800mA, RDDW08F-12 is ±12V and ±333mA, and RDDW08F-15 is ±15V and ±265mA according to the provided sibling specs.
Is the RDDW08F-05 intended for outdoor or extreme-temperature use?
The operating temperature range is -40°C to +85°C, which is broad for industrial and embedded environments. No IP rating is listed in the provided specs, so the product data does not identify it as an outdoor-exposed converter.
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