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Mean Well ERDN20-5 Redundancy Module Power Supply 20A

redundancy modulesupport 1+1 and 1+N redundancyrelay contacts for monitoring power status

SKU ERDN20-5

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Overview

ERDN20-5 is the model of this series: rated current 0~20A per input Continuous, typical efficiency 97%.

The E RDN20 series is a 20A redundancy module that can be used with a power supply to improve overall system operation reliability. Product key features include: 5V/12V/24 V/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°C.

Features

Support 1+1 and N+1 redundancy system
2 channels input and 1 output
Suitable for redundancy operation of 5V/12V/24V/48V system
Output current up to 20A
Cooling by free air convection
-40~+80°C ultra-wide operating temperature ( >+60°C derating)
Built-in 2 channels DC OK signal and alarm relay contact
3 years warranty

Specifications

ERDN20-5Specifications from the official datasheet (2026-03-06 edition)

INPUT

NUMBER OF INPUT: 2 Channels
DC NORMAL VOLTAGE: 5Vdc
DC VOLTAGE RANGE: 4.5~6Vdc
RATED CURRENT: 0~20A per input Continuous
VOLTAGE DROP (Vin-Vout) (max.): 0.2V
PEAK CURRENT: 0~30A per input 5Sec.
EFFICIENCY (Typ.): 97%
INPUT REVERSE CURRENT (max.): 1mA
INPUT REVERSE VOLTAGE (max.): 15Vdc

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: <4V or >6.5V (±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 ALTITUDE^Note.3: 5000 meters/OVC II

SAFETY & EMC

SAFETY STANDARDS: IEC62368-1, UL62368-1, EAC TP TC 004 approved, Design refer to BS EN/EN62368-1
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: Parameter Standard Test Level

Conducted BS EN/EN55032(CISPR32) Class B
Radiated BS EN/EN55032(CISPR32) Class B
EMC IMMUNITY: BS EN/EN55035, BS EN/EN61000-6-2(BS EN/EN50082-2)

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 4, 15KV air; Level 3, 8KV 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-Chassis ;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

Parameter	Standard	Test Level
Conducted	BS EN/EN55032(CISPR32)	Class B
Radiated	BS EN/EN55032(CISPR32)	Class B

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 4, 15KV air; Level 3, 8KV 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-Chassis ;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: 1853.5K hrs min. Telcordia SR-332 (Bellcore) ; 378.7K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 82*99*36mm (W*D*H)
PACKING: 0.206Kg;45psc/10.3Kg/0.76CUFT

Test conditions and notes4

1. All parameters NOT specially mentioned are measured at normal input (5V/12V/24V/48V) , rated load and 25℃ of ambient temperature.
2. Derating may be needed over high ambient temperature. Please check the derating curve for more details.
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. 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

ERDN20-5 20A Enclosed Type Redundancy Module — 20A Enclosed Type Redundancy Module

ERDN20-5 Output Derating VS Input Voltage — Output Derating VS Input Voltage

ERDN20-5 1. 1+1 Redundancy — 1. 1+1 Redundancy

ERDN20-5 2. 1+N Redundancy — 2. 1+N Redundancy

ERDN20-5 Illustration (page 5) — Illustration (page 5)

ERDN20-5 Dimensions (mm) — Dimensions (mm)

ERDN20-5 Function Connector(CN11): TKP DH2I-2X2 or equivalent — Function Connector(CN11): TKP DH2I-2X2 or equivalent

Downloads

Certificates6

Mean Well DRDN20-DRDN40-ERDN20-ERDN40 CB(UL) Certificate PDF Download

Mean Well ERDN20-40 EMC Certificate PDF Download

Mean Well ERDN20-40 CE-dec Certificate PDF Download

Mean Well ERDN20-40 UK-dec Certificate PDF Download

Mean Well E183223 UL Certificate PDF Download

Mean Well EAC Certificate PDF Download

Test reports1

Mean Well ERDN20-5 Test Report PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the ERDN20-5 for redundant 5V logic or embedded control power?

Yes, this model is the 5V version of the redundancy module, with a 4.5~6Vdc input range and a 20A continuous rating. It is suited to 5V systems that need redundant power architecture instead of a single-source design.

Is the ERDN20-5 suitable for 5V industrial computers or controller electronics that require redundancy?

It can be a fit when the equipment runs on 5V and the total load stays within 20A continuous. The listed support for 1+1 and 1+N redundancy is relevant for electronics that need higher uptime on a 5V rail.

Can the ERDN20-5 be used in a 5V automation system that needs alarm or status signaling?

Yes, the feature list includes relay contacts for monitoring power status. For a 5V redundant bus, that allows status monitoring alongside the module's 20A output capability.

How does the ERDN20-5 compare with the 12V, 24V, and 48V ERDN20 models?

The series includes the ERDN20-5 for 5V, ERDN20-12 for 12V, ERDN20-24 for 24V and ERDN20-48 for 48V systems, with each version rated at 20A. ERDN20-5 is the lowest-voltage model, with a 4.5~6Vdc input range and 97% typical efficiency versus 98% on the other versions.

Is the ERDN20-5 meant for outdoor use or temperature-challenging indoor equipment?

The operating temperature range is -40°C to +80°C, with derating above +60°C, which supports demanding indoor temperature conditions. No IP rating is listed, so the provided specs do not indicate outdoor-rated enclosure protection.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
Mean Well ERDN20-24 Redundancy Module Power Supply 20A	480W	24V	20A	IP20	View
Mean Well ERDN20-12 Redundancy Module Power Supply 20A	240W	12V	20A	IP20	View
Mean Well ERDN20-48 Redundancy Module Power Supply 20A	960W	48V	20A	IP20	View

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Mean Well ERDN20-5 Redundancy Module Power Supply 20A

Overview

Features

Specifications

INPUT

OUTPUT

PROTECTION

FUNCTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Technical drawings

Downloads

Certificates6

Test reports1

Catalogues2

FAQ

Payment & Security

Other ERDN20 Models

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Mean Well ERDN20-5 Redundancy Module Power Supply 20A

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