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Mean Well

Mean Well RS-50-3.3 Power Supply 50W 3.3V 10A

4.8 (14 reviews)
miniature sizeeconomicalwithstand 5G vibration and 70Β°C operation
SKU RS-50-3.3
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Select model β€” 7 in this family

RS-50-3.3
Available to order
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Overview

RS-50-3.3 is the 3.3V output model of this series: rated current 10A, rated power 33W, typical efficiency 78%.

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-50-3.3Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
10A
CURRENT RANGE
0 ~ 10A
RATED POWER
33W
RIPPLE & NOISE (max.)Note.2
80mVp-p
VOLTAGE ADJ. RANGE
3V ~ 3.6V
VOLTAGE TOLERANCENote.3
Β±3.0%
LINE REGULATIONNote.4
Β±0.5%
LOAD REGULATIONNote.5
Β±2.0%
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.)
78%
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
3.8 ~ 4.45V 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-50-3.3 Mechanical Specification
Mechanical Specification
RS-50-3.3 Block Diagram
Block Diagram
RS-50-3.3 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the RS-50-3.3 for 3.3V logic boards or embedded processor hardware?

Yes, if the load requires constant 3.3V and stays within 10A and 33W. That makes it suitable for 3.3V digital electronics, processor boards, and embedded assemblies that need higher current at a low voltage rail.

Is the RS-50-3.3 suitable for industrial communication modules or low-voltage controller boards?

It can be used for 3.3V constant-voltage electronics up to 10A, with 33W total available output. It is a fit for compact industrial and embedded modules that run directly from a 3.3V DC supply.

Can this model power multiple 3.3V electronics loads in one control system?

It can support multiple 3.3V loads if their combined demand remains within 10A and 33W. The main requirement is that all connected devices are designed for constant 3.3V operation and the total load stays inside the unit's rating.

How does the RS-50-3.3 compare with other 3.3V RS series models?

The listed 3.3V models are RS-15-3.3 at 9.9W and 3A, RS-25-3.3 at 19.8W and 6A, RS-35-3.3 at 35W and 7A, RS-50-3.3 at 33W and 10A, RS-75-3.3 at 49.5W and 15A, RS-100-3.3 at 66W and 20A, and RS-150-3.3 at 99W and 30A. The RS-50-3.3 offers more current than the RS-35-3.3, while remaining below the 49.5W, 66W, and 99W models in total output power.

Is the RS-50-3.3 appropriate for outdoor electronics cabinets or only indoor enclosures?

The specs list -25Β°C to +70Β°C operation and 5G vibration resistance, which supports demanding indoor equipment environments. No IP rating is provided, so the published data does not confirm outdoor or weather-exposed suitability.

Payment & Security

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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-50-3.3 Power Supply 50W 3.3V 10A
Mean Well

Mean Well RS-50-3.3 Power Supply 50W 3.3V 10A

Log in to see price

RS-50-3.3 is the 3.3V output model of this series: rated current 10A, rated power 33W, typical efficiency 78%.

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 3.3V
  • 100W 3.3V
  • 150W 3.3V
  • 25W 3.3V
  • 35W 3.3V
  • 50W 3.3V
  • 75W 3.3V
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