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Mean Well RSD-30L-3.3 DC-DC Converter - 19.8W - 18~72V in 3.3V out 6A

miniature sizeeconomicalwithstand 5G vibration and 70°C operation

SKU RSD-30L-3.3

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Overview

RSD-30L-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 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/P-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 EN50155 and 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-30L-3.3Specifications from the official datasheet (2020-08-27 edition)Download datasheet PDF

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: 18 ~ 72VDC
EFFICIENCY (Typ.): 84%
DC CURRENT (Typ.): 0.52A/48V
INRUSH CURRENT (Typ.): 20A/48VDC
INTERRUPTION OF VOLTAGE SUPPLY: EN50155:2007- G type comply with S1 level(3ms) @ full load,S2 level(10ms) @80% load ; L type comply with S2 level ( 10 ms ) @ full load EN50155:2017-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
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^{Note 4}: Parameter Standard Test Level

Conducted EN55032 Class A
Radiated EN55032 Class B
Harmonic Current EN6100-3-2 Class A
Voltage Flicker EN6100-3-3 -----
EMC IMMUNITY^{Note 4}: Parameter Standard Test Level

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

Parameter	Standard	Test Level
Conducted	EN55032	Class A
Radiated	EN55032	Class B
Harmonic Current	EN6100-3-2	Class A
Voltage Flicker	EN6100-3-3	-----

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

OTHERS

MTBF: 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 0.1uf & 47uf 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 http://www.meanwell.com)
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-30L-3.3 Block Diagram — Block Diagram

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

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

RSD-30L-3.3 Overload Protection — Overload Protection

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

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

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

RSD-30L-3.3 EN45545-2 Fire Test Conditions — EN45545-2 Fire Test Conditions

RSD-30L-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

Datasheet1

RSD-30L-3.3 datasheetRSD_30.pdf · 2020-08-27 edition PDF Download

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-30L-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-30L-3.3 for 3.3V embedded controllers, logic boards, or industrial communication electronics?

This converter is intended for constant-voltage 3.3V loads and can supply up to 6A, with a total power rating of 19.8W. That makes it suitable for 3.3V embedded electronics that need higher current at low voltage. Its 18-72V input range also suits systems fed from a wide DC source.

Is this a fit for powering 3.3V processors or FPGA-based control boards from a higher-voltage DC source?

It can be used where the equipment needs a fixed 3.3V output and stays within 6A and 19.8W. The constant-voltage output is aligned with boards that expect a regulated 3.3V rail. It is not a higher-power option, so the load has to stay within the published 19.8W limit.

Can the RSD-30L-3.3 be used in compact industrial or transportation electronics with vibration?

The converter is described as miniature in size at 113.0 x 60.0 x 25.0 mm and 0.25 kg, which helps in compact equipment. Its features also specify 5G vibration resistance, which supports use in moving or vibration-prone systems. The electrical fit still depends on needing 3.3V at up to 6A.

Will this converter handle cold or hot control cabinet conditions?

The operating temperature range is -40C to +70C, so it is specified for both low-temperature and elevated-temperature environments. No IP rating is listed in the provided specs, so the data does not confirm outdoor exposure or direct moisture resistance. It is best matched to protected installations where the temperature range is the main concern.

What are the differences between the RSD-30L-3.3 and the other RSD-30L output versions?

The RSD-30L-3.3 is rated at 19.8W with 3.3V output at 6A. The other listed RSD-30L versions are RSD-30L-5 at 30W, 5V, 6A, RSD-30L-12 at 30W, 12V, 2.5A, and RSD-30L-24 at 30W, 24V, 1.25A. In the provided data, they share the same 113.0 x 60.0 x 25.0 mm dimensions and 0.25 kg weight.

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Model	Power	Voltage	Current	IP Rating
Mean Well RSD-30L-5 DC-DC Converter - 30W - 18~72V in 5V out 6A	30W	5V	6A	IP20	View
Mean Well RSD-30L-24 DC-DC Converter - 30W - 18~72V in 24V out 1.25A	30W	24V	1.25A	IP20	View
Mean Well RSD-30L-12 DC-DC Converter - 30W - 18~72V in 12V out 2.5A	30W	12V	2.5A	IP20	View

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