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Mean Well RT-125A Power Supply 125W 5V 12V -5V 12A
Overview
RT-125A is the 5V 12V -5V output model of this series: rated current 12A 5.5A 1A, rated power 131W, typical efficiency 77%.
Features
- 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 -5V
- RATED CURRENT
- 12A 5.5A 1A
- CURRENT RANGENote.3
- 0 ~ 12A 0 ~ 6A 0 ~ 1A
- RATED POWERNote.6
- 131W
- RIPPLE & NOISE (max.)Note.2
- 80mVp-p 120mVp-p 80mVp-p
- VOLTAGE ADJ. RANGE
- CH1: 4.75 ~ 5.5V
- VOLTAGE TOLERANCENote.3
- ±2.0% +9,-5% +6,-10%
- LINE REGULATIONNote.4
- ±0.5% ±1.0% ±1.0%
- LOAD REGULATIONNote.5
- ±1.0% ±3.0% ±6.0%
- SETUP, RISE TIME
- 500ms, 20ms/230VAC 1200ms, 30ms/115VAC at full load
- HOLD UP TIME (Typ.)
- 25ms/230VAC 30ms/115VAC at full load
INPUT
- VOLTAGE RANGE
- 88 ~ 132VAC / 176 ~ 264VAC selected by switch 248 ~ 373VDC(Withstand 300VAC surge for 5sec. Without damage)
- FREQUENCY RANGE
- 47 ~ 63Hz
- EFFICIENCY (Typ.)
- 77%
- AC CURRENT (Typ.)
- 3A/115VAC 2A/230VAC
- INRUSH CURRENT (Typ.)
- COLD START 50A/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, 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(Note 9),-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
- 2853.1K hrs min. Telcordia SR-332 (Bellcore) ; 373.6K hrs min. MIL-HDBK-217F (25℃)
- DIMENSION
- 199*98*38mm (L*W*H)
- PACKING
- 0.7Kg; 20pcs/14Kg/0.85CUFT
Test conditions and notes10
- 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. (In order to meet tolerance, it is recommended that CH1 load > 15% rated current for A, B,D type and CH1 load > 20% rated current for C type.)
- 4. Line regulation is measured from low line to high line at rated load.
- 5. Load regulation is measured from 20% to 100% rated load, and other output at 60% rated load.
- 6. Each output can work within current range. But total output power can't exceed rated output power.
- 7. 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 )
- 8. Length of set up time is measured at cold first start. Turning ON/OFF the power supply very quickly may lead to increase of the set up time.
- 9. Testing harmonic current at 85%load.
- 10. 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 I use the RT-125A in an industrial control panel that needs 5V, 12V, and -5V rails?
Yes, this triple-output model provides 5V, 12V, and -5V from one power supply. Its total power rating is 131W, and the main 5V output is rated for 12A, which suits control electronics that need those three DC rails together.
Is the RT-125A a good fit for legacy automation or embedded systems that still require a negative rail?
It can be a fit because this version includes a -5V output along with 5V and 12V. That makes it more relevant for older industrial or embedded designs that cannot run from only positive-voltage rails.
Can the RT-125A power mixed logic and interface circuits in a compact machine build?
Yes, the RT-125A is designed as a triple-output constant-voltage supply in a 199.0 x 98.0 x 38.0 mm package. With 131W total power and 12A on the 5V output, it suits compact machine or automation assemblies that need multiple low-voltage rails in one unit.
Would the RT-125A work for equipment in vibration-prone industrial environments?
It may be suitable where vibration resistance matters because the listed features include withstanding 5G vibration. The operating temperature range of -25°C to +70°C also supports use in equipment exposed to broad indoor temperature swings.
Is the RT-125A suitable for outdoor use or only for protected indoor enclosures?
The published operating temperature range is -25°C to +70°C, which supports a fairly wide thermal range. No IP rating is listed, so it should be treated as a supply for protected indoor or enclosed use rather than direct outdoor exposure.
How does the RT-125A compare with the other RT-125 triple-output models?
In the RT-125 group, RT-125A is 131W with 5V, 12V, and -5V, RT-125B is 132W with 5V, 12V, and -12V, RT-125C is 132.5W with 5V, 15V, and -15V, and RT-125D is 136W with 5V, 24V, and 12V. The listed 5V current ratings are 12A for RT-125A, 12A for RT-125B, 10A for RT-125C, and 8A for RT-125D.
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