The Marinco 50A RV Surge Module attaches to the detachable power cord to provide surge protection. The compact size increases protection from inclement weather.• Model No. RSM-50• Power Rating: 50A• Surge Rating: 45, 000A max spike / 2, 030 joules• Contains surge protection indicator alerting user when depleted Surge protection indicator alerts user when depleted 50A power rating Surge Rating: 45, 000A max spike / 2, 030 joules | Marinco RSM-50 RV Surge Module, 50A