Replacement fuses are available for use with a variety of electronic systems for the purpose of circuit protection. Cartridge fuses are fabricated either from ceramic or glass. 3AB cartridge fuses are constructed with a ceramic body that can tolerate higher temperatures and offers higher interrupting and voltage ratings than the 3AG fuse. 3AG fuses are constructed with a glass body and are less expensive than the 3AB fuse. Both models are offered in fast-acting or time-delayed versions.