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Mean Well

Mean Well RS-50-12 Power Supply 50W 12V 4.2A

4.8 (14 reviews)
miniature sizeeconomicalwithstand 5G vibration and 70Β°C operation
SKU RS-50-12
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Select model β€” 7 in this family

RS-50-12
Available to order
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Overview

RS-50-12 is the 12V output model of this series: rated current 4.2A, rated power 50.4W, typical efficiency 84.5%.

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
  • No load power consumption<0.5W
  • High efficiency, long life and high reliability
  • 3 years warranty

Specifications

RS-50-12Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
12V
RATED CURRENT
4.2A
CURRENT RANGE
0 ~ 4.2A
RATED POWER
50.4W
RIPPLE & NOISE (max.)Note.2
120mVp-p
VOLTAGE ADJ. RANGE
10.8 ~ 13.2V
VOLTAGE TOLERANCENote.3
Β±1.0%
LINE REGULATIONNote.4
Β±0.5%
LOAD REGULATIONNote.5
Β±0.5%
SETUP, RISE TIME
500ms, 30ms/230VAC 1200ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.)
60ms/230VAC 14ms/115VAC at full load

INPUT

VOLTAGE RANGE
88 ~ 264VAC 125 ~ 373VDC (Withstand 300VAC surge for 5sec. Without damage)
FREQUENCY RANGE
47 ~ 63Hz
EFFICIENCY(Typ.)
84.5%
AC CURRENT (Typ.)
1.3A/115VAC 0.8A/230VAC
INRUSH CURRENT (Typ.)
COLD START 33A/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
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
Β±0.03%/℃ (0 ~ 50℃)
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 , AS/NZS 62368.1 , EAC TP TC 004, CCC GB4943.1 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,GB9254 class B,GB17625.1, 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
2956.7K hrs min. Telcordia SR-332 (Bellcore) ; 575.2K 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. 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 0.1ΞΌF & 47ΞΌF 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 0% to 100% rated load.
  6. 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 β€œEMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
  7. 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

RS-50-12 Mechanical Specification
Mechanical Specification
RS-50-12 Block Diagram
Block Diagram
RS-50-12 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the RS-50-12 for a 12V HMI, control panel accessory, or small automation device?

Yes, if the equipment needs a constant 12V supply and draws no more than 4.2A or 50.4W. That makes it appropriate for many compact industrial and automation loads built around a 12V DC input.

Is the RS-50-12 suitable for 12V industrial sensors, relays, or alarm electronics?

It is suitable for 12V constant-voltage devices as long as the total load remains within 4.2A and 50.4W. It fits low-power control and monitoring hardware that is specified for 12V DC operation.

Can this power supply run a 12V embedded or communications device in a machine cabinet?

It can, provided the device requires 12V constant voltage and stays under 4.2A with 50.4W total demand. The wide 88-264VAC input also makes it practical for equipment deployed across different AC mains environments.

How does the RS-50-12 compare with other 12V RS series models?

The listed 12V RS models are RS-15-12 at 15.6W and 1.3A, RS-25-12 at 25.2W and 2.1A, RS-35-12 at 35W and 3A, RS-50-12 at 50.4W and 4.2A, RS-75-12 at 72W and 6A, RS-100-12 at 102W and 8.5A, and RS-150-12 at 150W and 12.5A. The RS-50-12 is the mid-range 12V option between the 35W and 72W models.

Can the RS-50-12 be used in hot, cold, or vibration-prone indoor industrial settings?

The unit is rated for -25Β°C to +70Β°C operation and is specified to withstand 5G vibration. No IP rating is provided, so the specs support use in protected indoor equipment environments rather than open outdoor exposure.

Payment & Security

Payment methods

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Customer reviews

4.8 Reviews verified for authenticity
5 β˜… (12)
4 β˜… (1)
3 β˜… (1)
2 β˜… (0)
1 β˜… (0)

Reviewed by 14 customers across the RS series

  1. Exactly as specced

    By Daniel R.|2026-06-18βœ“ Verified Buyer
    Model: RS-15-24Quantity: 4

    Drop-in replacement, ran cool under full load on our DIN rail. Shipped same day.

  2. Workhorse

    By Maria K.|2026-05-28βœ“ Verified Buyer
    Model: RS-50-24Quantity: 12

    Bought a dozen for a control panel build β€” every one perfect.

  3. Solid little supply

    By Greg T.|2026-04-30βœ“ Verified Buyer
    Model: RS-100-24Quantity: 2

    Does the job. Wish the terminals were a touch bigger.

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Mean Well RS-50-12 Power Supply 50W 12V 4.2A
Mean Well

Mean Well RS-50-12 Power Supply 50W 12V 4.2A

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RS-50-12 is the 12V output model of this series: rated current 4.2A, rated power 50.4W, typical efficiency 84.5%.

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
  • No load power consumption<0.5W
  • High efficiency, long life and high reliability
  • 3 years warranty

Model

  • 15W 12V
  • 100W 12V
  • 150W 12V
  • 25W 12V
  • 35W 12V
  • 50W 12V
  • 75W 12V
View product

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