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Mean Well

Mean Well RID-125-1205 AC-DC Dual output enclosed power supply 125W 3A

miniature sizeeconomicalwithstand 5G vibration and 70°C operationisolated dual output
SKU RID-125-1205
$40.91 USD
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Overview

RID-125-1205 is the CH1: 12V / CH2: 5V output model of this series: rated current CH1: 9.2A / CH2: 3A, rated power 125.4W, typical efficiency 80%.

Features

  • Isolated output & GND for CH1,CH2
  • AC input range selectable by switch
  • Withstand 300VAC surge input for 5 seconds
  • Protections: Short circuit / Overload / Over voltage
  • 170% peak load for CH1
  • All using 105℃ long life electrolytic capacitors
  • Withstand 5G vibration test
  • LED indicator for power on
  • 100% full load burn-in test
  • High realibility
  • 3 years warranty

Specifications

RID-125-1205Specifications from the official datasheet (2025-12-19 edition)

OUTPUT

OUTPUT NUMBER
CH1 / CH2
DC VOLTAGE
CH1: 12V / CH2: 5V
RATED CURRENT
CH1: 9.2A / CH2: 3A
CURRENT RANGENote.6
CH1: 0 ~ 10.5A / CH2: 0 ~ 3A
PEAK LOADNote.9
CH1: 15.6A / CH2: 3A
RATED POWER
125.4W
RIPPLE & NOISE (max.)Note.2
CH1: 120mVp-p / CH2: 80mVp-p
VOLTAGE ADJ. RANGE
CH1: 11.4 ~ 13.2V
VOLTAGE TOLERANCENote.3
CH1: ±2.0% / CH2: ±3.0%
LINE REGULATIONNote.4
CH1: ±0.5% / CH2: ±0.5%
LOAD REGULATIONNote.5
CH1: ±1.0% / CH2: ±2.0%
SETUP, RISE TIME
500ms, 20ms/230VAC 1200ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.)
35ms/230VAC 30ms/115VAC at full load

INPUT

VOLTAGE RANGE
88 ~ 132VAC / 176 ~ 264VAC selected by switch 248 ~ 373VDC(300VAC peak 5sec., no damage)
FREQUENCY RANGE
47 ~ 63Hz
EFFICIENCY(Typ.)
80%
AC CURRENT (Typ.)
3A/115VAC 2A/230VAC
INRUSH CURRENT (Typ.)
COLD START 50A/230VAC
LEAKAGE CURRENT
<2mA / 240VAC

PROTECTION

OVERLOAD
>165% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
CH1: 13.8 ~ 16.2V 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 CH1 output
VIBRATION
10 ~ 500Hz, 5G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC (Note 7)

SAFETY STANDARDS
UL62368-1, TUV BS EN/EN62368-1, 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(Note 10),-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
218.2Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
199*98*38mm (L*W*H)
PACKING
0.59Kg; 20pcs/12.85Kg/0.85CUFT
Test conditions and notes11
  1. 1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
  2. 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. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. Line regulation is measured from low line to high line at rated load.
  5. 5. Load regulation is measured from 20% to 100% rated load, and other output at 60% rated load.
  6. 6. Each output can work within current range. But total output power can't exceed rated output power.
  7. 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. 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. 9. 10% duty cycle maximum within every second. Average output power should not exceed the rated power.
  10. 10. Testing harmonic current at 85%load.
  11. 11. 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

RID-125-1205 Mechanical Specification
Mechanical Specification
RID-125-1205 Block Diagram
Block Diagram
RID-125-1205 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the RID-125-1205 for 5V industrial control electronics inside a machine cabinet?

It can suit 5V control electronics where the load stays within its 3A output current and 125W power rating. The enclosed format and isolated dual output also make it relevant for industrial control assemblies rather than open-board bench use.

Is the RID-125-1205 suitable for embedded systems or low-voltage IT hardware that runs on 5V?

Yes, this model is aligned with 5V embedded or IT hardware because its output is 5V at 3A. Buyers should match it to equipment that needs a 5V supply and stay within the listed 125W rating.

Can the RID-125-1205 power 5V automation interfaces or monitoring modules?

It is a reasonable fit for 5V automation modules, interface boards, or monitoring electronics that need a regulated low-voltage supply. The 3A output current makes it better suited to moderate 5V loads than to heavier-current systems.

Is the RID-125-1205 meant for indoor or outdoor environments?

The operating temperature range is -25°C to +70°C, so the unit is specified for a fairly broad indoor equipment environment. No IP rating is listed in the provided specs, so outdoor exposure or washdown use is not confirmed by this data.

How does the RID-125-1205 compare with the other RID family options listed here?

The listed siblings are RID-125-1224 at 133.2W, 12V/24V; RID-125-1248 at 138W, 12V/48V; RID-125-2448 at 144W, 24V/48V; and RID-125-2405 at 125.4W, 24V/5V. Compared with those, the RID-125-1205 is the 125.4W, 12V/5V option in the series.

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Mean Well RID-125-1205 AC-DC Dual output enclosed power supply 125W 3A
Mean Well

Mean Well RID-125-1205 AC-DC Dual output enclosed power supply 125W 3A

$40.91 USD

RID-125-1205 is the CH1: 12V / CH2: 5V output model of this series: rated current CH1: 9.2A / CH2: 3A, rated power 125.4W, typical efficiency 80%.

Features

  • Isolated output & GND for CH1,CH2
  • AC input range selectable by switch
  • Withstand 300VAC surge input for 5 seconds
  • Protections: Short circuit / Overload / Over voltage
  • 170% peak load for CH1
  • All using 105℃ long life electrolytic capacitors
  • Withstand 5G vibration test
  • LED indicator for power on
  • 100% full load burn-in test
  • High realibility
  • 3 years warranty
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