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Mean Well

Mean Well RS-75-3.3 Power Supply 75W 3.3V 15A

4.8 (14 reviews)
miniature sizeeconomicalwithstand 5G vibration and 70Β°C operation
SKU RS-75-3.3
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Select model β€” 7 in this family

RS-75-3.3
Available to order
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Overview

RS-75-3.3 is the 3.3V output model of this series: rated current 15A, rated power 49.5W, typical efficiency 75%.

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-75-3.3Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
15A
CURRENT RANGE
0 ~ 15A
RATED POWER
49.5W
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.)
75%
AC CURRENT (Typ.)
2A/115VAC 1.2A/230VAC
INRUSH CURRENT (Typ.)
COLD START 40A/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 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, 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
2918.8K hrs min. Telcordia SR-332 (Bellcore) ; 569.6K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
129*98*38mm (L*W*H)
PACKING
0.41Kg; 30pcs/13.3Kg/0.86CUFT
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-75-3.3 Mechanical Specification
Mechanical Specification
RS-75-3.3 Block Diagram
Block Diagram
RS-75-3.3 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the RS-75-3.3 to power 3.3V industrial control boards or logic circuits?

Yes, this model is a constant-voltage 3.3V power supply with up to 15A output current and 49.5W rated power. It fits industrial control boards, logic sections, and other 3.3V DC loads that need more current than small board-level adapters can provide.

Is the RS-75-3.3 suitable for embedded systems or single-board electronics that need a regulated 3.3V rail?

It can be a fit when the equipment requires a fixed 3.3V DC supply and the total load stays within 15A and 49.5W. The wide 88-264VAC input also makes it usable in equipment that may be deployed across different AC mains regions.

Can this 3.3V power supply be used for factory test fixtures or bench equipment?

For fixed 3.3V DC test loads, the RS-75-3.3 can work well because it provides constant-voltage output at 3.3V with up to 15A available. Its compact 129.0 x 98.0 x 38.0 mm size can also help where enclosure space is limited.

Would the RS-75-3.3 work in automation cabinets that need a low-voltage auxiliary rail?

It is suited to automation or control enclosures that need a dedicated 3.3V auxiliary supply, as long as the connected devices stay within 49.5W total and 15A maximum output current. The unit is rated for operation from -25C to +70C and is specified to withstand 5G vibration.

Is the RS-75-3.3 intended for outdoor or washdown environments?

This model does not list an IP rating, so it is better treated as an enclosed power supply for protected indoor equipment rather than exposed outdoor or washdown use. Its published operating temperature range is -25C to +70C, which addresses temperature capability but not water or dust ingress protection.

How does the RS-75-3.3 compare with the other RS-75 output options?

Within the RS-75 group, the available outputs are RS-75-3.3 at 49.5W, 3.3V, 15A; RS-75-5 at 60W, 5V, 12A; RS-75-12 at 72W, 12V, 6A; RS-75-15 at 75W, 15V, 5A; RS-75-24 at 76.8W, 24V, 3.2A; and RS-75-48 at 76.8W, 48V, 1.6A. The main selection difference is the required DC output voltage, with current and wattage changing accordingly across the series.

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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-75-3.3 Power Supply 75W 3.3V 15A
Mean Well

Mean Well RS-75-3.3 Power Supply 75W 3.3V 15A

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RS-75-3.3 is the 3.3V output model of this series: rated current 15A, rated power 49.5W, typical efficiency 75%.

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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