Reliable Fuse Protection: MainUseool resettable fuse tester kit helps prevent blown fuses during troubleshooting by detecting overload, undervoltage, and short circuits. Simply plug the terminals into the fuse receptacle to test the breaker—after a trip, just press the reset button to continue testing. UL rated for 24V AC/DC and 125/250V AC for safe, professional use
Complete 2-Pack Kit: Includes both 3 Amp and 5 Amp resettable breakers, covering a wide range of HVAC and electrical diagnostic needs. Each breaker comes with a self-adhesive backing for quick, temporary installation. UL Recognized Component File No. E155159
Enhanced Convenience & Portability: Includes 2 waterproof caps for safer outdoor use, 4 spare 3A fuses and 4 spare 5A fuses, all neatly organized in a durable, reusable storage case. Perfect for HVAC technicians and electricians, it keeps everything protected, easy to carry, and ready to use—no interruptions when a fuse blows
OEM Replacement Compatibility: MainUseool 3 Amp fuse tool is fully compatible with and can replace the following models: Zebra ZK003 / ZK-003 POP-3, SPOP-3, Supco POP3 / SPOP3, G33039, and G33-039. The 5 Amp fuse tool is compatible with and replaces: Zebra ZK005 / ZK-005 POP-5, SPOP-5, Supco POP5 / SPOP5, G33040, and G33-040
Universal Compatibility: Fuse tester for circuit breaker works with all HVAC and electrical equipment, including central air conditioners, furnaces, generators, air compressors, marine systems, hot tubs, and any circuit board using ATC 3A or 5A fuses
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