Schottky rectifier in a common-cathode DPAK
The Schottky barrier gives it fast recovery — under 500 ns at currents above 200 mA — making it suited for high-frequency switching in power supplies, polarity protection, and OR-ing circuits where low forward drop reduces conduction losses.
Obsolete — planning your BOM move
The STPS1545CB-TR is listed as obsolete. For new designs or production builds that need this footprint and rating, you will be sourcing through the surplus and broker channel. The base product number is STPS1545, and the common-cathode DPAK variant may have a direct successor in ST's current Schottky portfolio — but no official replacement order code is recorded here. A cross-reference search against ST's active 45 V, 7.5 A dual Schottky list is the practical next step for the BOM.
What the forward voltage and current ratings mean for the supply rail
The 570 mV forward voltage at 7.5 A per diode is the headline efficiency number. In a 12 V output rectifier stage, that drop represents about 4.8% loss at full load per diode — acceptable for many industrial and telecom supplies, but worth comparing against a lower-Vf Schottky if the design is thermally constrained. The 7.5 A rating is per diode, so the common-cathode pair can handle a total of 15 A if the load splits evenly; in practice, derate for the junction temperature and the 175°C maximum junction limit. The 100 µA reverse leakage at 45 V is typical for this voltage class and should be factored into standby power budgets.
If you are filling a BOM line or qualifying a replacement, send the RFQ with your target quantity and required date code range.