AFD-01 LITTELFUSE | Alldatasheet
Document overview
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Technical content
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
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 Specifications Relevant Product Standard IEC 62606 Minimum Series Arc Fault Detection Level 2.5 A DC Regulated Supply Voltage 5V ± 1% Current consumption < 10 mA Rated Load Current Up to 40 A Fault Signal Output Pulse (Imax = 5 mA) to trip PMR or SCR Environmental Operating Conditions -25 ºC to +85 ºC Size (Width x Length x Height) 15 mm x 28 mm x 15 mm Sensor Board Weight < 6 g Dimensions (Millimeters) Handling Instructions Care should be taken to ensure the correct connection of the AFD-01. Miswiring the product may cause permanent damage. ESD Caution PCBA contains ESD (electrostatic discharge) sensitive devices. Damage may occur on devices subjected to high-energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality Wiring Diagram AFD-01 SYSTEM CONNECTION PIN NO. NAME DESCRIPTION 5 +5 V DC Regulated Power Supply
4 GND Ground
3 OUT Trip Output Voltage
2 LED “Fault” LED Output
1 Vin/Test Mains Input (via divider) / Test Buttom
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 Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for Standards Conformity & Certifications Product Safety Certifications Products tested, compliant and certified to the following standards that states the requirements for electrical products to ensure they are safe for consumers to use. CERTIFICATION BODY MARK CERTIFICATION BODY NAME CERTIFICATION DESCRIPTION STANDARDS COVERED BY THE CERTIFICATION IEC Conformity with the international standard for arc fault detection devices (AFDDs) for household and similar uses, intended to be used in ac circuits for rated voltages not exceeding 440 V ac with rated frequencies of 50 Hz, 60 Hz, or 50/60 Hz and rated currents not exceeding 63 A. IEC 62606
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