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Mean Well

Mean Well DRDN20-48 Redundancy Module Power Supply 20A - DIN Rail

redundancy modulesupport 1+1 and N+1 redundancyrelay contacts for monitoring power status
SKU DRDN20-48
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Overview

DRDN20-48 is the model of this series: rated current 0~20A per input Continuous, typical efficiency 98%.

The DRDN20 series is a 20A redundancy module that can be used with a power supply to improve overall system operation reliability. Product key features include:12V/24V/48V input voltage for selection, support N+1 and 1+1 redundancy systems,built-in two rails DC input contacts and single output. The MOSFET technology implemented can reduce heat loss and reduce the voltage difference between the input and output voltages, built-in 2 channels DC OK relay contacts for monitoring output status, ultra-wide operating temperature of -40 to +80℃ and narrow width (32mm).

Features

  • Support 1+1 and N+1 redundancy system
  • 2 channels input and 1 output
  • Suitable for redundancy operation of 12V/24V/48V system
  • Output current up to 20A
  • Cooling by free air convection
  • -40~+80℃ ultra-wide operating temperature ( >+60℃ derating)
  • 32mm slim width
  • Built-in 2 channels DC OK signal and alarm relay contact
  • Installed on DIN Rail TS35/7.5 or 15
  • 3 years warranty

Specifications

DRDN20-48Specifications from the official datasheet (2026-03-31 edition)

MODEL

MODEL
DRDN20-48

INPUT

NUMBER OF INPUT
2 Channels
DC NORMAL VOLTAGE
48Vdc
DC VOLTAGE RANGE
36~60Vdc
RATED CURRENT
0~20A per input Continuous
VOLTAGE DROP (Vin-Vout) (max.)
0.25V
PEAK CURRENT
0~30A per input 5Sec.
EFFICIENCY (Typ.)
98%
INPUT REVERSE CURRENT (max.)
1mA
INPUT REVERSE VOLTAGE (max.)
65Vdc

OUTPUT

RATED CURRENT
0~20A, Continuous
PEAK CURRENT (max.)
30A, 5Sec.
CAPACITANCE(Typ.)
320uF
STANDBY POWER LOSSES(Typ.)
1.5W

PROTECTION

OVERLOAD
<30A,5Sec. No damage
SHORT CIRCUIT
<30A,5Sec. No damage

FUNCTION

REDUNDANCY
For 1+1 redundancy ,and support N+1 redundancy
BOTH INPUTS VOLTAGE ALARM
<34.2V or >63V (±5%)
RELAY
30Vdc/1A resistive load
LED STATUS DISPLAY
Green LED OK

ENVIRONMENT

COOLING
Free air convection
WORKING TEMP.Note.2
-40 ~ +80℃ (Refer to "Derating Curve")
WORKING HUMIDITY
5 ~ 95% RH non-condensing
STORAGE TEMP.
-40 ~ +85℃
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 60℃ )
VIBRATION
Component:10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC61373
OPERATING ALTITUDENote.3
5000 meters/OVC II

SAFETY & EMC

SAFETY STANDARDS
IEC62368-1, UL62368-1, EAC TP TC 004 approved
WITHSTAND VOLTAGE
IP/OP - Chassis : 0.5KVac ; IP/OP- Relay : 0.5KVac ; Relay - Chassis : 0.5KVac
ISOLATION RESISTANCE
IP/OP - Chassis, IP/OP- Relay, Relay - Chassis:>100M Ohms / 500Vdc / 25℃/ 70% RH
EMC EMISSION
ParameterStandardTest Level
ConductedBS EN/EN55032(CISPR32)Class B
RadiatedBS EN/EN55032(CISPR32)Class B
Voltage Flicker----------
Harmonic Current----------
EMC IMMUNITY

BS EN/EN55035, BS EN/EN61000-6-2(BS EN/EN50082-2)

ParameterStandardTest Level
ESDBS EN/EN61000-4-2Level 4, 15KV air; Level 3, 8KV contact; criteria A
RadiatedBS EN/EN61000-4-3Level 3, 10V/m; criteria A
EFT / BurstBS EN/EN61000-4-4Level 3, 2KV; criteria A
SurgeBS EN/EN61000-4-5Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-Chassis ;criteria A
ConductedBS EN/EN61000-4-6Level 3, 10V; criteria A
Magnetic FieldBS EN/EN61000-4-8Level 4, 30A/m; criteria A

OTHERS

MTBF
1836.0K hrs min. Telcordia SR-332 (Bellcore) ; 482.1K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
32*125.2*102mm (W*H*D)
PACKING
0.35Kg;28psc/10.8Kg/1.23CUFT
Test conditions and notes4
  1. 1. All parameters NOT specially mentioned are measured at normal input (12V/24V/48V), rated load and 25℃ of ambient temperature.
  2. 2. Derating may be needed over high ambient temperature. Please check the derating curve for more details.
  3. 3. 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).
  4. 4. 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

DRDN20-48 Derating Curve
Derating Curve
DRDN20-48 Typical Application Notes
Typical Application Notes
DRDN20-48 Mechanical Specification
Mechanical Specification

Typical applications

  • Industrial control system
  • Semiconductor fabrication equipment
  • Factory automation
  • Electro-mechanical apparatus

Downloads

FAQ

Can I use the DRDN20-48 in a 48V industrial automation panel with redundant DC power?

Yes, this model is suited to 48V control-power architectures with a 36-60Vdc input range and is rated for 20A continuous. It supports 1+1 and N+1 redundancy, which is useful in industrial automation panels where redundant 48V power distribution is required.

Is the DRDN20-48 appropriate for telecom-style or networked control cabinets that run on 48V?

It can be a fit for enclosed 48V control cabinets when the redundant power path stays within 20A continuous. The DIN rail format and 125.2 x 102.0 x 32.0 mm dimensions also support organized cabinet layouts.

Can this redundancy module be used in a building management panel that standardizes on 48V control power?

Yes, if the panel uses 48V control power, this model matches that voltage and supports redundant configurations through 1+1 and N+1 operation. Its relay contacts provide a straightforward way to monitor power status at the panel level.

Is the DRDN20-48 suitable for a narrow DIN rail cabinet where space is limited?

Yes, the housing measures 125.2 x 102.0 x 32.0 mm, so it keeps a slim 32.0 mm profile on DIN rail. That makes it easier to place in narrow control cabinets while still supporting 48V systems up to 20A continuous.

What are the differences between the DRDN20-48 and the lower-voltage DRDN20 versions?

The DRDN20-48 is the 48V version with a 36-60Vdc input range and a 65Vdc max. input reverse voltage. The DRDN20-24 is the 24V version with 19-29Vdc input, and the DRDN20-12 is the 12V version with 9-14Vdc input, both with 40Vdc max. input reverse voltage. Across the series, current is 20A continuous, dimensions stay 125.2 x 102.0 x 32.0 mm, weight is 0.35 kg, operating temperature is -40°C to +80°C (with derating), and approvals are IEC62368-1, UL62368-1 and EAC TP TC 004.

Can the DRDN20-48 be used in a control cabinet exposed to harsh temperatures?

The specified operating range is -40°C to +80°C, with load derating at high ambient temperatures per the derating curve, so it is designed for wide-temperature cabinet environments. Since no IP rating is listed, it is best treated as a control cabinet or enclosure component rather than an exposed-environment device.

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Mean Well DRDN20-48 Redundancy Module Power Supply 20A - DIN Rail
Mean Well

Mean Well DRDN20-48 Redundancy Module Power Supply 20A - DIN Rail

Log in to see price

DRDN20-48 is the model of this series: rated current 0~20A per input Continuous, typical efficiency 98%.

The DRDN20 series is a 20A redundancy module that can be used with a power supply to improve overall system operation reliability. Product key features include:12V/24V/48V input voltage for selection, support N+1 and 1+1 redundancy systems,built-in two rails DC input contacts and single output. The MOSFET technology implemented can reduce heat loss and reduce the voltage difference between the input and output voltages, built-in 2 channels DC OK relay contacts for monitoring output status, ultra-wide operating temperature of -40 to +80℃ and narrow width (32mm).

Features

  • Support 1+1 and N+1 redundancy system
  • 2 channels input and 1 output
  • Suitable for redundancy operation of 12V/24V/48V system
  • Output current up to 20A
  • Cooling by free air convection
  • -40~+80℃ ultra-wide operating temperature ( >+60℃ derating)
  • 32mm slim width
  • Built-in 2 channels DC OK signal and alarm relay contact
  • Installed on DIN Rail TS35/7.5 or 15
  • 3 years warranty

Typical applications

  • Industrial control system
  • Semiconductor fabrication equipment
  • Factory automation
  • Electro-mechanical apparatus
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