Silicon power diode 5A, (U) 50V, blocking diode. For accessory rear lights or taillight / turn signal combinations, it may happenthat a small leak current flows on the brake line as soon as the tail light cable is connected.This can lead to malfunctions, eg with LoFs as soon as a trailer is connected.To prevent this, a 5A blocking diode is connected in series to the brake light cable, and so,that the current can flow to the tail light but not back. LOCK DIRECTION: if the diode is placed in front of you and the silver bar on the diode is on the right, the current can only flow from left to right.