Overview
The Littelfuse IDSR-5 is a Class RK5 cartridge-style indicator fuse rated for 5 amperes at 600VAC/600VDC. This dual-element, time-delay fuse combines solid-state design reliability with a patented visual trip indicator window, allowing maintenance technicians to quickly identify a blown fuse at a glance without circuit testing.
Key Features
- Dual-element time-delay (Slo-Blo) design tolerates inrush currents from motors and transformers
- Visual trip indicator for immediate fault identification without testing
- Solid-state construction rated for both AC and DC applications
- 600VAC/600VDC rated for DC-heavy industrial circuits
- UL Class RK5 classified for broad protection coverage
- Cartridge-style construction for standard fuse holders
Technical Specifications
- Ampere Rating: 5A
- Voltage Rating: 600VAC/600VDC
- Class: RK5
- Type: Time-Delay (Slo-Blo)
- Interrupting Rating: 20 kA @ 600VDC
- Construction: Dual-Element, Cartridge
- Indication: Built-in visual trip indicator
- Certifications: UL, CSA, cUL
- Manufacturer: Littelfuse
Typical Applications
The IDSR-5 is suitable for general-purpose circuits and equipment with moderate inrush currents:
- Motor circuits and motor starters
- Transformer primaries and secondaries
- Solenoid-operated devices
- Industrial lighting and fluorescent circuits
- Control circuits in automation cabinets
- DC power distribution systems
Compatibility & Replacements
Compatible With
- Standard cartridge fuse holders rated for Class RK5
- Industrial control panels and motor starters
- DC power supplies and battery chargers
- Transformer protection circuits
- Standard North American electrical systems
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The IDSR-5 is a direct replacement for other Class RK5, 5A fuses in standard cartridge holders, but specific cross-reference requires confirmation of holder type and voltage rating.
Works With
- Standard North American fuse cartridge holders and blocks
- Industrial control systems and switchboards
- UL/CSA-compliant electrical distribution equipment
- AC and DC circuit protection applications
