A pass element is a critical semiconductor component in voltage regulators that controls current flow to maintain stable output voltage.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Package Type | TO-220, TO-263, SOT-223, DFN | |
| Current Rating | 0.1A-100A | |
| Voltage Rating | 5V-1000V | |
| Dropout Voltage | 0.5V-3V | |
| Power Dissipation | 1W-500W | |
| Operating Temperature | -40°C to +150°C |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
An electronic component that maintains a constant output voltage level regardless of changes in input voltage or load conditions.
Electronic component that stabilizes and regulates power supply within a Wi-Fi module
An integrated circuit designed to maintain a constant output voltage level regardless of variations in input voltage or load conditions.
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In linear regulators, the pass element operates in its linear region as a variable resistor, dissipating excess power as heat. In switching regulators, the pass element operates as a switch (fully on or off) with much higher efficiency but more complex control circuitry.
Consider input/output voltage difference (dropout voltage), maximum load current, power dissipation requirements, thermal management capabilities, switching frequency (for switching regulators), and package constraints. Always include a safety margin of 20-30% above calculated requirements.
Common causes include thermal overload from insufficient heat sinking, voltage spikes exceeding ratings, current surges beyond specifications, electrostatic discharge (ESD), latch-up conditions, and aging effects in high-temperature environments.
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