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Mean Well

Mean Well RSD-300C-48 DC-DC Converter - 201.6W - 33.6~62.4V in 48V out 5.7A

miniature sizeeconomicalwithstand 5G vibration and 70°C operation
SKU RSD-300C-48
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Overview

RSD-300C-48 is the 48V output model of this series: rated current 6.3A, rated power 302.4W, typical efficiency 92%.

Features

  • Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard
  • 2:1 wide input range
  • Protections: Short circuit / Overload / Over voltage / Over temperature / Input reverse polarity
  • 4000VDC I/O isolation
  • Cooling by free air convection
  • Half encapsulated
  • Built-in constant current limiting circuit
  • 1U low profile 40mm
  • All using 105℃ long life electrolytic capacitors
  • LED indicator for power on
  • 100% full load burn-in test
  • 3 years warranty

Specifications

RSD-300C-48Specifications from the official datasheet (2025-07-18 edition)

OUTPUT

DC VOLTAGE
48V
RATED CURRENT
6.3A
CURRENT RANGE
0 ~ 6.3A
RATED POWER
302.4W
RIPPLE & NOISE (max.)Note.2
180mVp-p
VOLTAGE TOLERANCENote.3
±2.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±1.0%
SETUP, RISE TIME
800ms, 50ms at full load
HOLD UP TIME (Typ.)
Please refer to page 5,6 Hold up Time( Load de-rating curve )

INPUT

VOLTAGE RANGE CONTINUOUS
33.6 ~ 62.4VDC
VOLTAGE RANGE 1 SEC.
28.8 ~ 67.2VDC
EFFICIENCY (Typ.)
92%
DC CURRENT (Typ.)
7.2A/48V
INRUSH CURRENT (Typ.)
45A/48VDC
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
55.2 ~ 64.8V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE
Shut down o/p voltage, recovers automatically after temperature goes down

ENVIRONMENT

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

SAFETY & EMC (Note 5)

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
Compliance to BS EN/EN55032 (CISPR32) Conduction Emission: Class A, Radiation Emission: Class B, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8, BS EN/EN55035, light industry level, EAC TP TC 020
RAILWAY STANDARD
BS EN/EN50155 / IEC60571 including IEC61373 for shock & vibration,BS EN/EN50121-3-2 for EMC;BS EN/EN45545-2 for fire protection

OTHERS

MTBF
1850.1K hrs min. Telcordia SR-332 (Bellcore) ; 130.8K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
216*96.5*40mm (L*W*H)
PACKING
1.19Kg ; 12pcs/15.3Kg/0.97CUFT
Test conditions and notes6
  1. 1. All parameters NOT specially mentioned are measured at 24,48VDC 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 0.1μF & 47μF parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. Strongly recommended that external output capacitance should not exceed 5000uF. (Only for: RSD-300-5 / -12)
  5. 5. 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 )
  6. 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-300C-48 Mechanical Specification
Mechanical Specification
RSD-300C-48 Block Diagram
Block Diagram
RSD-300C-48 Input Under-Voltage Protection
Input Under-Voltage Protection
RSD-300C-48 Hold-up Time
Hold-up Time
RSD-300C-48 Efficiency vs Load & Vin Curve
Efficiency vs Load & Vin Curve
RSD-300C-48 RSD-300E-5
RSD-300E-5
RSD-300C-48 RSD-300E-48
RSD-300E-48
RSD-300C-48 Parallel and Series Connection
Parallel and Series Connection
RSD-300C-48 supplier if you have this kind of application.
supplier if you have this kind of application.
RSD-300C-48 supplier if you have this kind of application. (2)
supplier if you have this kind of application. (2)
RSD-300C-48 Overload Protection
Overload Protection
RSD-300C-48 Derating Curve
Derating Curve
RSD-300C-48 R S D - 3 0 0 series
R S D - 3 0 0 series
RSD-300C-48 R S D - 3 0 0 series (2)
R S D - 3 0 0 series (2)
RSD-300C-48 LOAD(%)
LOAD(%)
RSD-300C-48 Immunity to Environmental Conditions
Immunity to Environmental Conditions

Downloads

FAQ

Can I use the RSD-300C-48 for 48V telecom or networking equipment on a 33.6 to 62.4V DC bus?

Yes. The RSD-300C-48 is a constant-voltage converter with 33.6 to 62.4V input and 48V output. Its 302.4W and 6.3A rating makes it appropriate for 48V communications equipment that stays within those limits.

Is this model appropriate for 48V industrial sensors or automation devices in a higher-voltage DC system?

It can be, provided the load requires regulated 48V DC and draws no more than 6.3A. The converter is rated at 302.4W and is intended for converting a 33.6 to 62.4V DC input to a fixed 48V output.

Can the RSD-300C-48 support embedded or edge computing hardware that uses 48V DC input?

Yes, for 48V hardware that fits within 302.4W and 6.3A. This model is a constant-voltage 48V converter, so it is suited to embedded or edge devices that need stable 48V from a 33.6 to 62.4V source.

Is the RSD-300C-48 a good choice for mobile or vibration-prone industrial systems?

It is designed for harsher motion environments because the specs list 5G vibration resistance with IEC61373 mounting compliance. That makes it a reasonable option for 48V loads in moving industrial equipment as long as the application stays within 302.4W and 6.3A.

Can this converter be used in cold or high-heat environments?

The specified operating temperature range is -40°C to +55°C at full load, up to +70°C at 60% load by free-air convection, or +70°C at full load with an external base plate; -40°C to +85°C is the storage range. The specs do not list an IP rating, so they do not confirm outdoor exposure protection.

What are the main differences between the RSD-300C-48 and the other RSD-300C output options?

The listed RSD-300C versions are RSD-300C-5 at 210W, 5V, 42A, RSD-300C-12 at 300W, 12V, 25A, RSD-300C-24 at 300W, 24V, 12.5A, and RSD-300C-48 at 302.4W, 48V, 6.3A. The differences are the output voltage, current, and listed wattage for each version.

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Mean Well RSD-300C-48 DC-DC Converter - 201.6W - 33.6~62.4V in 48V out 5.7A
Mean Well

Mean Well RSD-300C-48 DC-DC Converter - 201.6W - 33.6~62.4V in 48V out 5.7A

Log in to see price

RSD-300C-48 is the 48V output model of this series: rated current 6.3A, rated power 302.4W, typical efficiency 92%.

Features

  • Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard
  • 2:1 wide input range
  • Protections: Short circuit / Overload / Over voltage / Over temperature / Input reverse polarity
  • 4000VDC I/O isolation
  • Cooling by free air convection
  • Half encapsulated
  • Built-in constant current limiting circuit
  • 1U low profile 40mm
  • All using 105℃ long life electrolytic capacitors
  • LED indicator for power on
  • 100% full load burn-in test
  • 3 years warranty
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