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Mean Well RT-50B Power Supply 50W 5V 12V -12V 4A
Overview
RT-50B is the 5V 12V -12V output model of this series: rated current 4A 2A 0.5A, rated power 50W, typical efficiency 75.5%.
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 CH3
- DC VOLTAGE
- 5V 12V -12V
- RATED CURRENT
- 4A 2A 0.5A
- CURRENT RANGENote.3
- 0 ~ 5A 0 ~ 2.5A 0 ~ 1A
- RATED POWER
- 50W
- RIPPLE & NOISE (max.)Note.2
- 80mVp-p 120mVp-p 120mVp-p
- VOLTAGE ADJ. RANGE
- CH1: 4.75 ~ 5.5V
- VOLTAGE TOLERANCENote.3
- ±2.0% ±8.0% ±3.0%
- LINE REGULATIONNote.4
- ±0.5% ±1.5% ±0.5%
- LOAD REGULATIONNote.5
- ±1.0% ±3.0% ±1.0%
- 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.)
- 75.5%
- 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 (Note 6)
- SAFETY STANDARDS
- UL62368-1, TUV BS EN/EN62368-1, EAC TP TC 004, BIS IS13252(Part1): 2010/IEC 60950-1:2005 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
- 2788.1K hrs min. Telcordia SR-332 (Bellcore) ; 504.7K 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
Certificates8
Test reports1
Catalogues1
FAQ
Can the RT-50B power analog and digital sections in one automation assembly?
Yes, when the assembly needs the RT-50B's triple output combination of 5V, 12V, and -12V. The supply is rated for 50W total and lists 5V at 4A on its main output. That makes it relevant for mixed-signal control or interface hardware that uses both positive and negative low-voltage rails.
Is the RT-50B suitable for instrumentation or signal-conditioning equipment that requires a negative rail?
It can be, because the model specification includes a -12V output alongside 5V and 12V. The unit is constant voltage and rated for 50W total, with the listed 5V rail at 4A. That output set is more aligned with instrumentation and control electronics than a single-rail power supply.
Can I use the RT-50B in a compact embedded or industrial electronics enclosure?
Yes, provided the load stays within the 50W total rating and the 5V draw stays within 4A. The housing measures 99.0 × 97.0 × 36.0 mm and weighs 0.41 kg, so it is sized for smaller enclosures. Its 88-264VAC input also supports use across varied AC input conditions.
Does the RT-50B support indoor industrial environments with vibration or higher ambient temperatures?
The listed operating range is -25°C to +70°C, and the features mention 5G vibration resistance plus 70°C operation. Those specs support indoor industrial use where temperature and vibration are concerns. No IP rating is shown, so the provided data does not confirm outdoor or wet-location suitability.
What are the key differences between the RT-50B and the other RT models listed here?
The RT-50B is a 50W triple-output unit providing 5V (4A), 12V (2A), and -12V (0.5A). It features universal AC input (88-264VAC), free air convection cooling, and protections for short circuit, overload, and overvoltage. The unit measures 99x97x36mm and carries a 3-year warranty. Other models in the RT-50 series vary by output voltage combinations and total wattage (e.g., RT-50A is 46.5W, RT-50D is 51W), but the RT-50B is distinct for its specific 5V/12V/-12V configuration.
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