ZTX550STOB

Single Bipolar Transistors Overview

The ZTX550STOB is an obsolete PNP medium power transistor in the E-Line package, superseded by the ZTX551. It features a collector-emitter breakdown voltage (BVCEO) of -45V and a continuous collector current (IC) of -1A. The device supports a peak pulse current (ICM) of -2A and operates with junction temperatures up to +200°C. Power dissipation is rated at 1W under standard mounting conditions. The component is totally lead-free, fully RoHS compliant, and halogen and antimony free.

Single Bipolar Transistors Feature Summary

• High-temperature operation capability with junction temperature ratings up to +200°C
• Totally lead-free construction that is fully RoHS compliant and halogen/antimony free
• Qualified to JEDEC standards for high reliability applications

Single Bipolar Transistors Applications

• LCD backlight converters
• Emergency lighting systems
• DC-DC converters

Single Bipolar Transistors Procurement Notes

Verify current availability status as the ZTX550 series is listed as obsolete. Confirm replacement with the ZTX551 model for new designs. Ensure sourcing channels are authorized to avoid counterfeit components. Check specific packaging requirements if legacy stock is required for maintenance purposes.

Single Bipolar Transistors Selection Notes

Select the ZTX551 as the direct functional replacement for the obsolete ZTX550. Verify that the higher breakdown voltage of the ZTX551 (-65V vs -45V) meets circuit requirements. Ensure thermal management strategies align with the 1W power dissipation rating in the E-Line package.

Single Bipolar Transistors Part Context

This component belongs to the ZTX550/ZTX551 family of PNP transistors manufactured by Diodes Incorporated. It utilizes the E-Line (TO-92 compatible) plastic molded package. The part is designed for general-purpose switching and amplification tasks requiring medium power handling capabilities.

Single Bipolar Transistors Replacement Considerations

Use ZTX551 or ZTX551STZ as the official replacement. The ZTX551 offers improved voltage ratings while maintaining similar current and package characteristics.