0.25 W zener — the thermal ceiling for the BOM
The HZ5BLLRE-E is a 0.25 W zener diode from Renesas, rated for 0.25 W power dissipation. That 0.25 W sets the derating limit: at elevated ambient temperatures the allowable power drops, so the series resistor and load current must be sized to keep junction temperature within the safe operating area.
Active production — no phase-out risk
It is ROHS3 compliant.
Bulk packaging — pick-and-place note
For automated assembly, the feeder setup will need a bulk-to-tape conversion or manual placement. Confirm the packaging format with the order quantity; bulk can be cost-effective for low-volume or prototype runs.
