TE Connectivity Mini ISO PI Automotive Relays. TE Connectivity Mini ISO series automotive relays feature a non-latching coil with a high expected life cycle. The VF4 series is available in a variety of mounting and terminal types, suitable for automotive applications including headlamps, ignition load etc. Features and Benefits. 12V / 24V variants available. Plated brass terminals PCB pin or plug in QC terminal options socket, through hole, and chassis mount options