Mini ISO Automotive Relays - F4 Series. TE Connectivity F4 series Mini ISO automotive relays are available with quick connect plug-in terminals or as PCB mount relays. Protected against dust to IP54, the F4 series are designed for a variety of automotive applications. Features and Benefits. Integrated components. Various contact arrangements and materials. Non-latching (monostable). Applications:. Ignition lock. Lamp load (headlamps). Exhaust emission control. ABS. Fuel pump. Electric Power Steering. Wiper Control. Car Alarm. Blower Fans