MEAN WELL ERDN20-12 Power Supply Accessory, 12 V, 20 A redundancy module

Overview

What it is

The MEAN WELL ERDN20-12 is a power supply accessory from the ERDN20 series (20 A Enclosed Type Redundancy Module), rated 12 V, 20 A redundancy module.

What it is used for

Joins the outputs of two (or N+1) DC power supplies through MOSFET isolation so the load keeps running if one supply fails, and signals which input has failed. MEAN WELL lists applications such as industrial control systems, semiconductor fabrication equipment, factory automation, electro-mechanical apparatus.

Key features

• Supports 1+1 and N+1 redundancy systems.
• 2 input channels and 1 output.
• For 5 V / 12 V / 24 V / 48 V systems, output current up to 20 A.
• Operating temperature -40 °C to +80 °C (derating above +60 °C).
• Built-in 2 channel DC OK signal and alarm relay contact.
• Cooling by free air convection.

Key Specifications

• Rated Output Current: 0 to 20 A continuous; peak 30 A for 5 s.
• Input Voltage Range: 12 V DC nominal (9 V to 14 V DC), 2 input channels.
• Redundancy: 1+1 redundancy, supports N+1 redundancy.
• Voltage Drop (max.): 0.2 V.
• Operating Temperature: -40 °C to +80 °C (see derating curve).

Buying considerations

Size the unit with headroom above the connected load and check the derating information in the datasheet for high ambient temperature or low input voltage. Other models in the same series are listed on this page.

Installation considerations

MEAN WELL treats this unit as a component of the final equipment, so approvals and EMC performance should be confirmed for the complete installation. Wiring and safety details are in the official datasheet linked below.