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Mean Well RSD-30G-3.3 DC-DC Converter - 19.8W - 9~36V in 3.3V out 6A

miniature sizeeconomicalwithstand 5G vibration and 70°C operation

SKU RSD-30G-3.3

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Overview

RSD-30G-3.3 is the 3.3V output model of this series: rated current 6A, rated power 19.8W, typical efficiency 84%.

RSD-30 is a 30W enclosed type DC-DC reliable railway converter. This series is compliant with BS EN/EN50155/ IEC60571 railway standard, constituting three types of models with 4:1 wide but different input ranges 9~36V/18~72V/40~160V, suitable for railway and all kinds of transportation systems exploiting the frequently used standard input voltages such as 12V, 24V, 36V, 48V, 72V, 96V and 110V. Various output voltages, 3.3V, 5V, 12V and 24V are available for selection. This series has the capability of working under -40~+70℃, low ripple and noise, supreme EMC characteristics, 4KVDC I/OP-OP, low enclosure profile 25mm and an interior with semi-potted silicone. It does not only well fits the in-car systems or the facilities by rails for railway, trams and buses but also can be used in the harsh environment with high vibration, high dust, extremely low or high temperature, etc.

Features

Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard
Ultra compact and 1U low profile(25mm)
4:1 wide input range
No minimum load required
Protections: Short circuit / Overload / Over voltage / Input reverse polarity
4000VDC I/O isolation (reinforced isolation)
Half encapsulated , cooling by free air convection
-40~+70℃ wide working temperature
Built-in constant current limiting circuit
LED indicator for power on
3 years warranty

Specifications

RSD-30G-3.3Specifications from the official datasheet (2026-07-09 edition)

OUTPUT

DC VOLTAGE: 3.3V
RATED CURRENT: 6A
CURRENT RANGE: 0 ~ 6A
RATED POWER: 19.8W
RIPPLE & NOISE (max.)^Note.2: 70mVp-p
VOLTAGE TOLERANCE^Note.3: ±2.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME: 120ms, 85ms at full load
HOLD UP TIME (Typ.): Please refer to page 5 Hold up Time( Load de-rating curve )

INPUT

VOLTAGE RANGE CONTINUOUS: 9 ~ 36VDC
EFFICIENCY (Typ.): 84%
DC CURRENT (Typ.): 1.1A/24V
INRUSH CURRENT (Typ.): 20A/24VDC
INTERRUPTION OF VOLTAGE SUPPLY: EN50155:2021-Comply with S1 level

PROTECTION

OVERLOAD: 105 ~ 135% rated output power Protection type : Constant current limiting, recovers automatically after fault condition is removed
OVER VOLTAGE: 3.8 ~ 4.5V Protection type : Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: -40 ~ +55℃ (no derating) ; +70℃ @ 60% load by free air convection ; +70℃ (no derating with external base plate)
WORKING HUMIDITY: 5 ~ 95% RH non-condensing
STORAGE TEMP.: -40 ~ +85℃
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes ; Mounting : compliance to IEC61373
OPERATING ALTITUDE: 5000 meters

SAFETY & EMC

SAFETY STANDARDS: IEC 62368-1, UL 62368-1, AS/NZS 62368-1, EAC TP TC 004 approved, Design refer to BS EN/EN62368-1
WITHSTAND VOLTAGE: I/P-O/P:4KVDC I/P-FG:2.5KVDC O/P-FG:2.5KVDC
ISOLATION RESISTANCE: I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032 Class A
Radiated BS EN/EN55032 Class B
Harmonic Current BS EN/EN61000-3-2 -----
Voltage Flicker BS EN/EN61000-3-3 -----
EMC IMMUNITY: BS EN/EN55035

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, ±8KV air; Level 3, ±6KV contact
Radiated Field BS EN/EN61000-4-3 Level X, 20V/m
EFT / Burst BS EN/EN61000-4-4 Level 3, 2KV at power
Surge BS EN/EN61000-4-5 Level 3,1KV Line-Line, Level 3, 2KV Line-Earth
Conducted BS EN/EN61000-4-6 Level 3
RAILWAY STANDARD: Compliance to BS EN/EN45545-2 for fire protection ;BS EN/EN50155 / IEC60571 including IEC61373 for shock & vibration, BS EN/EN50121-3-2 for EMC

Parameter	Standard	Test Level
Conducted	BS EN/EN55032	Class A
Radiated	BS EN/EN55032	Class B
Harmonic Current	BS EN/EN61000-3-2	-----
Voltage Flicker	BS EN/EN61000-3-3	-----

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, ±8KV air; Level 3, ±6KV contact
Radiated Field	BS EN/EN61000-4-3	Level X, 20V/m
EFT / Burst	BS EN/EN61000-4-4	Level 3, 2KV at power
Surge	BS EN/EN61000-4-5	Level 3,1KV Line-Line, Level 3, 2KV Line-Earth
Conducted	BS EN/EN61000-4-6	Level 3

OTHERS

MTBF: 3093.5K hrs min. Telcordia SR-332 (Bellcore) ; 396.9K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 113*60*25mm (L*W*H)
PACKING: 0.25Kg; 56pcs/15Kg/0.81CUFT

Test conditions and notes6

1. All parameters NOT specially mentioned are measured at 24,48VDC input, rated load and 25℃ of ambient temperature.
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. Tolerance : includes set up tolerance, line regulation and load regulation.
4. 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 )
5. Strongly recommended that external output capacitance should not exceed 5000uF.
6. 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

RSD-30G-3.3 Block Diagram — Block Diagram

RSD-30G-3.3 Input Under-Voltage Protection — Input Under-Voltage Protection

RSD-30G-3.3 Efficiency vs Load & Vin Curve — Efficiency vs Load & Vin Curve

RSD-30G-3.3 Parallel and Series Connection — Parallel and Series Connection

RSD-30G-3.3 Overload Protection — Overload Protection

RSD-30G-3.3 Derating Curve — Derating Curve

RSD-30G-3.3 Suitable installation methods are shown as below. Since… — Suitable installation methods are shown as below. Since…

RSD-30G-3.3 b.Operate with additional iron plate — b.Operate with additional iron plate

RSD-30G-3.3 R S D - 3 0 series — R S D - 3 0 series

RSD-30G-3.3 Mechanical Specification — Mechanical Specification

Typical applications

Bus, tram, metro or railway system
Wireless network
Telecom or datacom system
Highly vibrating, highly dusty, extremely low or high temperature harsh environment

Downloads

Certificates7

Mean Well RSD-30-EN50155 Certificate PDF Download

Mean Well RSD-30-CB(UL) Certificate PDF Download

Mean Well RSD-30-EMC Certificate PDF Download

Mean Well RSD-30-CE-dec Certificate PDF Download

Mean Well RSD-30-UK-dec Certificate PDF Download

Mean Well E183223 UL Certificate PDF Download

Mean Well EAC Certificate PDF Download

Test reports1

Mean Well RSD-30G-3.3 Test Report PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the RSD-30G-3.3 to power 3.3V embedded boards or industrial logic circuits?

Yes, it is appropriate for 3.3V constant-voltage electronics when the total load stays within 19.8W and 6A. That makes it relevant for embedded control boards, logic sections, and other low-voltage electronics that need regulated 3.3V output.

Is this a good fit for 3.3V automation electronics powered from a 9-36VDC source?

It can be a fit when the source is within 9-36VDC and the downstream 3.3V load remains at or below 19.8W. The 6A output current is useful for low-voltage electronics that need higher current at 3.3V.

Can the RSD-30G-3.3 be used in mobile or rugged embedded equipment?

Yes, for 3.3V loads up to 19.8W and 6A, it is positioned for embedded equipment use. The specified 5G vibration resistance and -40°C to +55°C full-load operating range (up to +70°C at 60% load, or full load with an external base plate) support more demanding equipment conditions.

Does the RSD-30G-3.3 support outdoor installation?

The temperature range is specified as -40°C to +55°C at full load, extending to +70°C with derating or an external base plate, so thermal capability is defined. However, no IP rating is listed in the provided specs, so exposed outdoor or washdown use is not confirmed here.

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Model	Power	Voltage	Current	IP Rating
Mean Well RSD-30G-5 DC-DC Converter - 30W - 9~36V in 5V out 6A	30W	5V	6A	IP20	View
Mean Well RSD-30G-24 DC-DC Converter - 30W - 9~36V in 24V out 1.25A	30W	24V	1.25A	IP20	View

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