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Mean Well

Mean Well RS-100-3.3 Power Supply 100W 3.3V 20A

4.8 (14 reviews)
miniature sizeeconomicalwithstand 5G vibration and 70Β°C operation
SKU RS-100-3.3
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Select model β€” 7 in this family

RS-100-3.3
In stock
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Overview

RS-100-3.3 is the 3.3V output model of this series: rated current 20A, rated power 66W, typical efficiency 74%.

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
  • High efficiency, long life and high reliability
  • 3 years warranty

Specifications

RS-100-3.3Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
20A
CURRENT RANGE
0 ~ 20A
RATED POWER
66W
RIPPLE & NOISE (max.)Note.2
80mVp-p
VOLTAGE ADJ. RANGE
3.2V ~ 3.5V
VOLTAGE TOLERANCENote.3
Β±3.0%
LINE REGULATIONNote.4
Β±0.5%
LOAD REGULATIONNote.5
Β±2.0%
SETUP, RISE TIME
500ms, 20ms/230VAC 1200ms, 30ms/115VAC at full load
HOLD UP TIME (Typ.)
95ms/230VAC 17ms/115VAC at full load

INPUT

VOLTAGE RANGE
88 ~ 264VAC 125 ~ 373VDC (Withstand 300VAC surge for 5sec. Without damage)
FREQUENCY RANGE
47 ~ 63Hz
EFFICIENCY (Typ.)
74%
AC CURRENT (Typ.)
2.5A/115VAC 1.5A/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 (Note 6)

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
3196.6K hrs min. Telcordia SR-332 (Bellcore) ; 526.7K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
159*97*38mm (L*W*H)
PACKING
0.6Kg; 24pcs/15.4Kg/0.83CUFT
Test conditions and notes8
  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. 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. 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.
  8. 8. 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-100-3.3 Mechanical Specification
Mechanical Specification
RS-100-3.3 Block Diagram
Block Diagram
RS-100-3.3 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the RS-100-3.3 for 3.3V logic, FPGA, or processor-heavy embedded hardware?

Yes, it is a constant-voltage 3.3V supply rated for 20A and 66W. That makes it relevant for embedded or digital hardware that needs a high-current 3.3V rail in an enclosed system.

Is the RS-100-3.3 suitable for industrial electronics that run on a 3.3V bus?

It can fit industrial electronics designed for 3.3V constant voltage, as long as the total draw remains within 20A and 66W. Its 88-264VAC input also supports equipment intended for a broad AC input range.

Can this model power multiple 3.3V control or communications boards in one enclosure?

It is suited to grouped 3.3V loads in a protected enclosure when the combined requirement stays within 20A and 66W. The compact 159.0 Γ— 97.0 Γ— 38.0 mm package helps where internal equipment space is tight.

Is the RS-100-3.3 rated for indoor or outdoor conditions?

The listed operating temperature range is -25Β°C to +70Β°C, and the features note 5G vibration resistance. No IP rating is provided, so the available specs support protected indoor industrial use rather than direct outdoor exposure.

How does the RS-100-3.3 compare with the other RS-100 models?

The RS-100-3.3 is rated for 66W at 3.3V 20A. Other models in the series include RS-100-5 (80W, 5V 16A), RS-100-12 (102W, 12V 8.5A), RS-100-15 (105W, 15V 7A), RS-100-24 (108W, 24V 4.5A), and RS-100-48 (110.4W, 48V 2.3A).

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-100-3.3 Power Supply 100W 3.3V 20A
Mean Well

Mean Well RS-100-3.3 Power Supply 100W 3.3V 20A

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RS-100-3.3 is the 3.3V output model of this series: rated current 20A, rated power 66W, typical efficiency 74%.

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
  • 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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