The patented Bourns® MultiStage Protector, or MSP® device, combines the strengths of gas tube and solid-state protectors while eliminating their weaknesses within rated limits. The Bourns® MSP protector series is the synergistic integration of three advanced protection technologies: a sixth generation gas tube, precision-matched MOVs, and a switch-grade fail-short device. The Bourns® MSP product provides faster turn-on, higher reliability than standard GDT protection, lower capacitance, and higher energy handling than typical solid state protection. This is combined with a switch-grade fail-short mechanism to provide superior thermal overload protection. The MSP assembly is Telcordia analyzed to severe environmental requirements simulating 20 years service life with no failures.