What the 25 A average rating means for your power supply
The GBPC25005-E4/51: The GBPC25005-/51 is a Vishay single-phase bridge rectifier rated for 25 A average rectified output current (Io) at a 50 V peak reverse voltage (VRRM). For a bulk capacitor-fed supply, the 25 A rating assumes the diode conduction angle and the resulting I²R heating in the die — the actual ripple current the capacitor sees will be higher than the DC output, so the thermal margin in the GBPC package matters. Forward voltage drop is specified at 1.1 V typical at 12.5 A (half the rated current), which gives a conduction loss of about 13.75 W per leg at full load — the GBPC package's large copper tab and box-style body are designed to sink that heat into the chassis or heatsink. Reverse leakage is 5 µA at the rated 50 V, negligible until the junction temperature climbs above 100°C, where it doubles per the typical diode curve.
Package and mounting — GBPC with QC terminals
The GBPC25005-/51 comes in the 4-Square GBPC package with quick-connect (QC) terminals, not solder pins. The QC tab width is standard 0.250-inch (6.3 mm) — mates with the common Molex or TE crimp receptacle found in power distribution blocks. The four terminals are clearly marked AC input (two) and DC output (+ and -), with the polarity stamped on the case. Mounting is through the centre hole in the GBPC package — a single M3 or #6 screw through the chassis provides both mechanical retention and thermal conduction. The package back is electrically isolated (the die is mounted on an alumina substrate inside the epoxy case), so no insulating pad is needed between the bridge and the grounded chassis.
Active lifecycle and compliance status
The -55°C low end suits outdoor equipment in cold climates; the 150°C TJ(max) is typical for a standard silicon rectifier — derate the output current above 100°C ambient per the datasheet curve.
Sourcing and availability
The GBPC25005-/51 is a standard Vishay catalog item, so lead times are generally consistent with the GBPC series production schedule.