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Mean Well RSD-500C-12 DC-DC Converter - 420W 33.6-67.2V DC in 12V out 35A

miniature sizeeconomicalwithstand 5G vibration and 70°C operation

SKU RSD-500C-12

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Overview

RSD-500C-12 is the 12V output model of this series: rated current 35A, rated power 420W, typical efficiency 93%.

RSD-500 series is a 500W enclosed type reliable railway DC-DC converter. This series is compliant with BS EN/EN50155/BS EN/EN45545-2 railway standard, constituting three types of models with 2:1 wide but different input ranges 16.8~33.6V/33.6~67.2V/67.2~154V, suitable for railway and all kinds of transportation systems exploiting the frequently used standard input voltages such as 24V, 36V, 48V, 72V, 96V and 110V.Various output voltages, 12V, 24V and 48V are available for selection. This series has the capability of working under -40~+80℃, low ripple and noise, supreme EMC characteristics, 4KVdc I/O isolation, low enclosure profile 41mm 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
1U low profile 41mm
2:1 wide input range
Fanless design, half encapsulated , cooling by free air convection
-40~+80℃ wide operating temperature
DC output adjustable
Protections: Short circuit / Overload / Over voltage / Over temperature / Input reverse polarity/ Input under voltage protection
4KVdc I/O isolation(Reinforced isolation)
Operating additude up to 5000 meters(Note.5)
LED indicator for power on
3 years warranty

Specifications

RSD-500C-12Specifications from the official datasheet (2026-07-02 edition)

OUTPUT

DC VOLTAGE: 12V
RATED CURRENT: 35A
CURRENT RANGE: 0 ~ 35A
RATED POWER: 420W
RIPPLE & NOISE (max.)^Note.2: 100mVp-p
VOLTAGE ADJ. RANGE: 12 ~ 14V
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 500ms, 60ms
HOLD UP TIME (Typ.): Please refer to page 4 hold up time (Load de-rating curve )

INPUT

VOLTAGE RANGE CONTINUOUS: 33.6 ~ 67.2Vdc
VOLTAGE RANGE 1s^Note.4: 28.8 ~ 33.6Vdc
EFFICIENCY (Typ.): 93%
DC CURRENT (Typ.): 11A @48Vdc
INRUSH CURRENT (Typ.): 30A
INTERRUPTION OF VOLTAGE SUPPLY: EN50155:2021-B/C/D type comply with S1 level (3ms)@ full load; B/C type comply with S2 level (10ms)@ 70% load, D- type comply with S2 level (10ms) @ full load

PROTECTION

OVERLOAD: Constant current limiting 105~135% rated output power with auto-recovery
OVER VOLTAGE: 14.4 ~ 17.5V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, re-power on to recover
REVERSE POLARITY: By internal, MOSFET, no damage, recovers automatically after fault condition is removed
UNDER VOLTAGE LOCKOUT: 48Vin :Power ON≥33.6V , OFF≤33V

ENVIRONMENT

WORKING TEMP.: -40 ~ +80℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 5 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85, 5 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 55℃)
VIBRATION: Component:10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC61373
OPERATING ALTITUDE^Note.5: 5000 meters / OVCⅡ

SAFETY & EMC

SAFETY STANDARDS: UL62368-1, IEC 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 (CISRP32) Class A
Radiated BS EN/EN55032 (CISRP32) Class B
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; criteria A
Radiated BS EN/EN61000-4-3 Level 3, 10V/m; criteria A
EFT / Burst BS EN/EN61000-4-4 Level 3, 2KV; criteria A
Surge BS EN/EN61000-4-5 Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-FG ;criteria A
Conducted BS EN/EN61000-4-6 Level 3, 10V; criteria A
Magnetic Field BS EN/EN61000-4-8 Level 4, 30A/m; criteria A
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 (CISRP32)	Class A
Radiated	BS EN/EN55032 (CISRP32)	Class B
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; criteria A
Radiated	BS EN/EN61000-4-3	Level 3, 10V/m; criteria A
EFT / Burst	BS EN/EN61000-4-4	Level 3, 2KV; criteria A
Surge	BS EN/EN61000-4-5	Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-FG ;criteria A
Conducted	BS EN/EN61000-4-6	Level 3, 10V; criteria A
Magnetic Field	BS EN/EN61000-4-8	Level 4, 30A/m; criteria A

OTHERS

MTBF: 834.7K hrs min. Telcordia SR-332 (Bellcore) ; 99.1K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 237*100*41mm (L*W*H)
PACKING: 1.45Kg;10pcs/15.5Kg/0.8CUFT

Test conditions and notes6

1. All parameters NOT specially mentioned are measured at normal input (B:24Vdc , C:48Vdc , D:110Vdc ) , 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. Derating may be needed under low input voltage. Please check the derating curve for more details.
5. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than2000m(6500ft).
6. The power supply is considered as an independent unit, but the final equipment still need to re-confirm that the whole system complies with the 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 )

Technical drawings

RSD-500C-12 Block Diagram — Block Diagram

RSD-500C-12 Input Under-Voltage Protection — Input Under-Voltage Protection

RSD-500C-12 Efficiency vs Load & Vin Curve — Efficiency vs Load & Vin Curve

RSD-500C-12 Overload Protection — Overload Protection

RSD-500C-12 Derating Curve — Derating Curve

RSD-500C-12 methods are similar and share the same derating curve. — methods are similar and share the same derating curve.

RSD-500C-12 methods are similar and share the same derating curve. (2) — methods are similar and share the same derating curve. (2)

RSD-500C-12 Illustration (page 7) — Illustration (page 7)

RSD-500C-12 Mechanical Specification — Mechanical Specification

Typical applications

Bus,tram,metro or railway system
Industrial control system
Semiconductor fabrication equipment
Factory automation
Electro-mechanical
Wireless network
Telecom or datacom system
Highly vibrotating,highly dusty, extremely low or high temperature harsh environment

Downloads

Datasheet1

RSD-500C-12 datasheetRSD-500-SPEC.PDF · 2026-07-02 edition PDF Download

Certificates3

UL Certificate(RSD-500)(EN) PDF Download

CE Certificate(RSD-500)(EN) PDF Download

CB Certificate(RSD-500)(EN) PDF Download

FAQ

Can I use the RSD-500C-12 to power 12V PLC and industrial control devices from a 33.6-67.2V DC source?

Yes. The RSD-500C-12 accepts 33.6-67.2V DC input and provides a constant 12V output, which fits DC systems that need regulated 12V for control electronics. Its 420W rating and 35A output current support higher-current 12V loads within those limits.

Is this a good fit for 12V embedded systems with heavier current demand?

It is suitable for 12V embedded equipment that needs constant-voltage output and draws up to 35A, with a total power limit of 420W. The compact 237.0 × 100.0 × 41.0 mm housing can also help where enclosure space is limited.

Can the RSD-500C-12 be used in mobile or vibration-prone 12V control equipment?

Yes, for 12V DC loads within 420W and 35A. The specs state 5G vibration resistance and a -40°C to +80°C operating range (full load up to 55°C, or 70°C when mounted on the recommended iron plate), which are relevant for equipment that sees movement or sustained heat. It remains a constant-voltage 12V converter, so the connected load must require regulated 12V output.

Can this converter be used in hot, cold, or outdoor locations?

The published operating range is -40°C to +80°C; full load is rated up to 55°C without an iron mounting plate (derating from 55°C to 80°C), or up to 70°C when installed on the recommended iron plate. That supports use in equipment exposed to broad temperature variation. No IP rating is provided, so the listed specs do not establish direct outdoor or washdown suitability.

How does the RSD-500C-12 compare with the other 12V models in the RSD 500 series?

The 12V models in the 500 series are RSD-500B-12 at 420W, 12V, and 35A, RSD-500C-12 at 420W, 12V, and 35A, and RSD-500D-12 at 420W, 12V, and 35A. On output rating, they are the same. The model distinction in the series is the input range family rather than a different 12V output power level.

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Model	Power	Voltage	Current	IP Rating
Mean Well RSD-500C-48 DC-DC Converter - 460.8W 33.6-67.2V DC in 48V out 9.6A	460.8W	48V	9.6A	IP20	View
Mean Well RSD-500C-24 DC-DC Converter - 460.8W 33.6-67.2V DC in 48V out 19.2A	460.8W	24V	19.2A	IP20	View

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