Pre-biased NPN in a SOT-23 — what the integrated resistors save
The Infineon BCR505E6327HTSA1 is an NPN pre-biased transistor in a PG-SOT23 package. It integrates a 2.2 kOhms base resistor (R1) and a 10 kOhms emitter-base resistor (R2), eliminating two external passives per switching or driver stage. Collector current is rated to 500 mA with a VCEO of 50 V, and transition frequency reaches 100 MHz. Typical applications include relay drivers, small-signal switching, and logic-level interface circuits where board space is tight.
Last-time-buy — plan your final order
This part carries a Last Buy lifecycle status. That means Infineon has announced end-of-life and the final order window is open. Once the last-time-buy window closes, the only channel will be surplus or broker inventory. If this transistor is qualified on an active BOM, lock in the lifetime buy quantity now.
500 mA collector current — what it handles
The 500 mA maximum collector current defines the load this transistor can switch. For a relay or solenoid driver, that covers many 12 V automotive and industrial loads up to about 6 W (50 V * 0.5 A derated). The saturation voltage is 300 mV at 50 mA, so dissipation in the on-state stays low for logic-level loads. The 330 mW package power limit is the binding constraint for continuous duty — at 500 mA the device must be pulsed or the ambient kept low.