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Mean Well RT-125B Power Supply 125W 5V 12V -12V 12A
Overview
RT-125B is the 5V 12V -12V output model of this series: rated current 12A 5A 1A, rated power 132W, typical efficiency 78%.
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 -12V
- RATED CURRENT
- 12A 5A 1A
- CURRENT RANGENote.3
- 0~ 12A 0 ~ 6A 0 ~ 1A
- RATED POWERNote.6
- 132W
- RIPPLE & NOISE (max.)Note.2
- 80mVp-p 120mVp-p 120mVp-p
- VOLTAGE ADJ. RANGE
- CH1: 4.75 ~ 5.5V
- VOLTAGE TOLERANCENote.3
- ±2.0% +9,-5% ±6.0%
- 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.)
- 78%
- 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-125B for industrial electronics that need 5V, 12V, and -12V outputs from one supply?
Yes, this model is built for that kind of multi-rail requirement because it provides 5V, 12V, and -12V outputs. It is rated for 132W total power, and the 5V output is rated at 12A.
Is the RT-125B suitable for analog or interface boards that need a -12V rail?
It can be appropriate because the RT-125B specifically includes a -12V output in addition to 5V and 12V. That makes it a stronger match than models that provide -5V, -15V, or no negative rail at all.
Can the RT-125B be used in embedded test equipment or bench electronics with several low-voltage rails?
Yes, the triple-output design is useful where one supply needs to serve multiple DC rails at once. Its 132W rating and 199.0 x 98.0 x 38.0 mm size make it practical for compact embedded or electronic equipment builds.
Would the RT-125B make sense in a control cabinet exposed to vibration and elevated temperature?
The listed features include 5G vibration resistance and operation up to 70°C. Combined with the -25°C to +70°C operating range, that supports use in demanding indoor industrial cabinets.
Can the RT-125B be used outside a sealed enclosure?
The temperature range is -25°C to +70°C, but no IP rating is listed in the provided specifications. Because of that, it is better suited to protected indoor equipment or enclosed housings than open outdoor exposure.
What is the difference between RT-125B and the other RT-125 models?
RT-125B is the 132W version with 5V, 12V, and -12V outputs. The related models are RT-125A at 131W with 5V, 12V, and -5V, RT-125C at 132.5W with 5V, 15V, and -15V, and RT-125D at 136W with 5V, 24V, and 12V; their 5V current ratings are 12A, 10A, and 8A respectively for A, C, and D.
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