CB1A-D-12V is an automotive relay featuring a 12V DC nominal coil voltage with an integrated diode inside and 1 Form A contact arrangement. The relay incorporates ISO (International Organization for Standardization) terminal arrangement with solder-plated terminals, and is designed with a compact form factor of 22 × 26 mm base area. It delivers high switching capacity of 40 A at resistive loads and operates reliably across a wide ambient temperature range. The integrated diode provides transient suppression, making it suitable for automotive engine compartment applications and other harsh environments where electromagnetic switching protection is essential.