Fuse Application Categories

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🔥 Fuse Application Categories

IEC 60269 fuse classification system. First letter = breaking range, Second letter = application.

Class	Breaking Range	Application	Description	Typical Use
gG	Full range	General purpose	Protection against overload and short-circuit	Cable/line protection, general circuits
gM	Full range	Motor protection	Full-range motor circuit protection	Motor starters, motor feeders
gR	Full range	Semiconductor	Full-range semiconductor protection	Rectifiers, thyristors, diodes
gS	Full range	Semiconductor	Full-range with cable protection capability	Semiconductor + cable protection
gTr	Full range	Transformer	Full-range transformer protection	Distribution transformers
gPV	Full range	Photovoltaic	Full-range PV string protection	Solar panel strings
gB	Full range	Mining	Full-range mining equipment protection	Mining installations
gN	Full range	North American	General purpose (North American style)	General circuits (UL/CSA)
aM	Partial range	Motor protection	Short-circuit only (needs overload relay)	Motor circuits with separate overload
aR	Partial range	Semiconductor	Short-circuit only for semiconductors	Power electronics, drives
gL	Full range	Line protection	Cable and line protection (legacy DIN)	Older German installations
gI	Full range	International	General purpose (IEC harmonized)	International installations

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