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Mean Well RD-50B Power Supply 50W 5V 24V 4A
Overview
RD-50B is the model of this series: rated power 53.6W, typical efficiency 79%.
Features
- Universal AC input / Full range
- Protections: Short circuit / Overload / Over voltage
- Cooling by free air convection
- LED indicator for power on
- 100% full load burn-in test
- All using 105℃ long life electrolytic capacitors
- Withstand 300VAC surge input for 5 second
- High operating temperature up to 70℃
- Withstand 5G vibration test
- High efficiency, long life and high reliability
- 3 years warranty
Specifications
OUTPUT
- OUTPUT NUMBER
- CH1 / CH2
- DC VOLTAGE CH1
- 5V
- DC VOLTAGE CH2
- 24V
- RATED CURRENT CH1
- 4A
- RATED CURRENT CH2
- 1.4A
- CURRENT RANGE CH1Note.3
- 0 ~ 6A
- CURRENT RANGE CH2Note.3
- 0 ~ 2A
- RATED POWER
- 53.6W
- RIPPLE & NOISE (max.) CH1Note.2
- 80mVp-p
- RIPPLE & NOISE (max.) CH2Note.2
- 150mVp-p
- VOLTAGE ADJ. RANGE
- CH1: 4.75 ~ 5.5V
- VOLTAGE TOLERANCE CH1Note.3
- ±2.0%
- VOLTAGE TOLERANCE CH2Note.3
- ±8%
- LINE REGULATION CH1Note.4
- ±0.5%
- LINE REGULATION CH2Note.4
- ±1.5%
- LOAD REGULATION CH1Note.5
- ±0.5%
- LOAD REGULATION CH2Note.5
- ±3.0%
- SETUP, RISE TIME
- 500ms, 20ms/230VAC 1200ms, 30ms/115VAC at full load
- HOLD UP TIME (Typ.)
- 60ms/230VAC 10ms/115VAC at full load
INPUT
- VOLTAGE RANGE
- 88 ~ 264VAC 125 ~ 373VDC (Withstand 300VAC surge for 5sec. Without damage)
- FREQUENCY RANGE
- 47 ~ 63Hz
- EFFICIENCY(Typ.)
- 79%
- AC CURRENT (Typ.)
- 1.3A/115VAC 0.8A/230VAC
- INRUSH CURRENT (Typ.)
- COLD START 48A/230VAC
- LEAKAGE CURRENT
- <2mA / 240VAC
PROTECTION
- OVERLOAD
- 110 ~ 150% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
- OVER VOLTAGE
- CH1: 5.75 ~ 6.75V Protection type : Hiccup mode, recovers automatically after fault condition is removed
ENVIRONMENT
- WORKING TEMP.
- -25 ~ +70℃ (Refer to "Derating Curve")
- WORKING HUMIDITY
- 20 ~ 90% RH non-condensing
- STORAGE TEMP., HUMIDITY
- -40 ~ +85℃, 10 ~ 95% RH
- TEMP. COEFFICIENT
- ±0.03%/℃ (0 ~ 50℃)on +5V output
- VIBRATION
- 10 ~ 500Hz, 5G 10min./1cycle, period for 60min. each along X, Y, Z axes
SAFETY & EMC
- SAFETY STANDARDS
- UL62368-1, TUV BS EN/EN62368-1, BIS IS 13252(Part 1):2010/IEC 60950-1:2005, EAC TP TC 004 approved
- WITHSTAND VOLTAGE
- I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
- ISOLATION RESISTANCE
- I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
- EMC EMISSION
- Compliance to BS EN/EN55032 (CISPR32) Class B, BS EN/EN61000-3-2,-3, EAC TP TC 020
- EMC IMMUNITY
- Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN55035, BS EN/EN61000-6-2 (BS EN/EN50082-2), heavy industry level, EAC TP TC 020
OTHERS
- MTBF
- 2981.9K hrs min. Telcordia SR-332 (Bellcore) ; 594.2K hrs min. MIL-HDBK-217F (25℃)
- DIMENSION
- 99*97*36mm (L*W*H)
- PACKING
- 0.41Kg; 45pcs/19.5Kg/0.94CUFT
Test conditions and notes7
- 1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
- 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
- 3. Tolerance : includes set up tolerance, line regulation and load regulation, when multi-channel output, it is recommended that CH1 load > 10%.
- 4. Line regulation is measured from low line to high line at rated load.
- 5. Load regulation is measured from 0% to 100% rated load.
- 6. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
- 7. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
Technical drawings
Downloads
FAQ
Can I use the RD-50B for a control cabinet that needs 5V logic and 24V auxiliary power?
Yes, this is a dual output constant voltage power supply with 5V and 24V outputs and a total rated power of 53.6W. The 5V output is rated at 4A, so it fits lighter logic loads while also providing a second output rail. It is better suited to compact controls and auxiliary electronics than to higher-current 5V systems.
Is the RD-50B a good fit for industrial communication or monitoring hardware with moderate 5V demand?
It can be, provided the main 5V load stays within 4A and the total power stays within 53.6W. That makes it more appropriate for lighter 5V electronics than models in the same series with 6A or 8A on the 5V rail. Its 88-264VAC input also helps when the equipment may be used on different AC mains ranges.
Can the RD-50B be used in embedded or automation equipment where space is limited?
Yes, its 99.0 x 97.0 x 36.0 mm size and 0.41 kg weight make it a compact option for enclosure-based equipment. It is a constant voltage design with a 5V 4A main output, so it fits lower-power embedded and automation assemblies rather than larger 5V loads. The dual output design is useful where two DC rails are needed from one supply.
Is the RD-50B suitable for outdoor use or washdown areas?
The operating temperature range is -25C to +70C, which covers a broad indoor industrial temperature range. No IP rating is listed in the provided specs, so it should not be treated as an exposed outdoor or washdown-rated power supply. It is better suited to protected indoor installations or enclosed equipment.
What are the main differences between the RD-50B and other RD series siblings?
The RD-50B is a 53.6W dual output power supply with 5V 4A and 24V 1.4A outputs. It features universal AC input (88-264VAC), free air convection cooling, and protections for short circuit, overload, and over voltage. It operates from -25 to +70°C and carries UL62368-1 and TUV certifications. The unit measures 99x97x36mm and comes with a 3-year warranty.
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