ZK005 Zebra Instruments ZBreaker 24 Volt or 120 Volt 5 Amp Circuit Breaker (includes wires, plug-in terminals & mount) - The same circuit breakers now found on many high-end transformers and systems, but at a great price! Kit includes wires and pre-installed terminals that allow you to easily plug it in to the connectors where a plastic-type fuse existed. 3 Amp Size.