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Littelfuse.com/AFD-01

©2025 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: 11/12/2025

Circuit Protection & Interrupter Subassemblies

AFD-01 Series

Description

The AFD-01 is a compact, low-power sensor designed for detecting arc fault currents in 230 V ac, 50 Hz installations,

compliant with IEC 62606. It also provides programmable overvoltage protection via external resistors, meeting EN

50550 standards.

Engineered for integration into 18 mm-wide circuit breakers, the AFD-01 operates from a 5 V regulated dc supply and

supports load currents up to 40 A. It features a fault signal output that activates a PMR or SCR, along with an LED

indicator for visual fault confirmation. The sensor includes a continuous automatic self-test to ensure reliable operation,

and a manual test function is available via the Vin/Test pin for additional diagnostics.

Features & Benefits

FEATURES

BENEFITS

Arc Fault Detection

Fast response per IEC 62606 for enhanced safety

Overvoltage Protection

Programmable via external resistors; compliant with EN 50550

Compact Footprint

Designed for integration into 18 mm-wide circuit breakers

Applications

• Switchgear

• Motor Control Centres

Ordering Information

CATALOG #

DESCRIPTION

90165

AFD-01 AC Arc Fault Current Detector

AC Arc Fault Detector