Our ISF Series provides reliable overcurrent protection for intrinsic safety barrier applications, with fuse options covering a wide range of ratings and hazardous location requirements.
The ISF Series includes a comprehensive selection of intrinsic safety fuses designed for use in barrier circuits across hazardous location environments. Each range – including ISF001, ISF003, ISF011, ISF012 and ISF021 – has been developed to support different current ratings, performance requirements and industry applications.
Browse the ranges below to view full specifications and available fuse values for each series.
The ISF001 Series is designed for intrinsic safety applications where reliable overcurrent protection is essential. Manufactured using high-quality Littelfuse components, this range supports low-current barrier circuits typically found in hazardous location environments.
The ISF001 fuses provide stable, fast-acting protection and are suitable for a wide variety of certified IS systems. Full specifications and available fuse values can be found within this range.
The ISF003 Series is designed for intrinsic safety applications where reliable overcurrent protection is essential. Manufactured using high-quality Littelfuse components, this range supports low-current barrier circuits typically found in hazardous location environments.
The ISF003 fuses provide stable, fast-acting protection and are suitable for a wide variety of certified IS systems. Full specifications and available fuse values can be found within this range.
The ISF011 Series is engineered for intrinsic safety applications requiring precise, low-current overcurrent protection within hazardous area systems. Designed for dependable integration into certified intrinsically safe circuits, this range supports stable and consistent current limitation in control and instrumentation environments.
Manufactured to meet stringent safety standards, ISF011 fuses deliver fast-acting protection and reliable performance across a defined range of current ratings. Full technical specifications and available fuse values are detailed within this series.
The ISF012 Series is developed for intrinsically safe installations where compact, dependable overcurrent protection is critical. Suited to low-power barrier circuits and hazardous location equipment, this range ensures controlled fault response and system integrity under abnormal conditions.
Built for reliability in demanding industrial environments, ISF012 fuses provide consistent fast-acting performance across multiple current ratings. Complete electrical characteristics and available fuse options are outlined within this range.
The ISF021 Series is designed for intrinsic safety systems requiring robust and stable overcurrent protection across certified hazardous area applications. Optimised for use within IS barrier networks and low-energy circuits, this range offers precise current interruption to maintain system safety and compliance.
Manufactured to rigorous quality standards, ISF021 fuses deliver dependable fast-response protection and are available in a comprehensive selection of current ratings. Detailed technical specifications and available fuse values can be found within this series.