FBR51 Latching Compact High Power Relays FCL Components FBR51 Latching Compact High Power Relays for automotive applications are magnetically-latched PCB relays that offer a constant current rating of 30A and an increased ambient temperature range up to +125°C. The components feature two coils with set and reset function. The FBR51 Series power relays from FCL Components are also surface mountable and reflow solderable.