Bosch has been producing relays for vehicles and other applications for more than 40 years - this vast development experience ensures continuous advancement in design features to deliver optimum performance. Bosch Normal Open Mini Relays feature a compact design and are used in a wide range of vehicles to perform switching operations. Make contact or normally open (NO) is a relay contact that is open when a relay is in idle position and closes when the relay moves to the operating position. Bosch relays incorporate only the highest quality materials for reliable, long-term performance and a 100,000 switching cycle capability. Engineered with high corrosion resistance to ensure long term reliability in harsh environments and conditions.