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 Micro Relays feature a compact design and are used in a wide range of vehicles to perform switching operations. Bosch relays incorporate only premium quality materials for reliable, long-term performance and a 100,000 switching cycle capability. Engineered to withstand temperatures ranging from -40°F to up to +212°F (-40°C to up to +100°C).