Overview
The BAT54ST is a surface-mount Schottky barrier diode produced by onsemi (formerly part of Diodes Incorporated and Fairchild Semiconductor). This diode is known for its ultra-small SOT523 package, making it ideal for space-constrained applications. It is designed to offer low forward voltage drop, fast switching times, and robust protection against transient and ESD events. The BAT54ST is fully RoHS compliant, lead-free, and halogen- and antimony-free, aligning with environmental regulations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT523 | - |
| Forward Voltage Drop (VF) | - | mV |
| Reverse Leakage Current (IR) | 2.0 | µA |
| Total Capacitance (CT) | 10 | pF |
| Reverse Recovery Time (tRR) | 5.0 | ns |
| Moisture Sensitivity Level | 1 | - |
| Lead Finish | Matte Tin Plated | - |
| Weight | 0.002 | grams |
Key Features
- Ultra-small surface-mount package (SOT523)
- Low forward voltage drop
- Fast switching times
- PJ junction guard ring for transient and ESD protection
- Totally lead-free and fully RoHS compliant
- Halogen- and antimony-free, 'Green' device
- Matte tin plated leads, solderable per MIL-STD-202, Method 208
- UL flammability classification rating 94V-0
Applications
The BAT54ST Schottky barrier diode is suitable for a variety of applications where low forward voltage drop and fast switching are critical. These include:
- Power management circuits
- Switch-mode power supplies
- Rectifier circuits
- ESD protection circuits
- Automotive and industrial electronics (with the appropriate automotive-compliant version)
Q & A
- What is the package type of the BAT54ST diode?
The BAT54ST diode comes in an ultra-small SOT523 surface-mount package.
- Is the BAT54ST diode RoHS compliant?
Yes, the BAT54ST diode is fully RoHS compliant, lead-free, and halogen- and antimony-free.
- What is the typical forward voltage drop of the BAT54ST diode?
The forward voltage drop is typically low, but the exact value can be found in the detailed datasheet.
- What is the reverse leakage current of the BAT54ST diode?
The reverse leakage current (IR) is 2.0 µA at VR = 25V.
- What is the reverse recovery time of the BAT54ST diode?
The reverse recovery time (tRR) is 5.0 ns.
- Is the BAT54ST diode suitable for high-temperature applications?
The diode can operate over a range of temperatures, but specific high-temperature limits should be checked in the datasheet.
- What is the moisture sensitivity level of the BAT54ST diode?
The moisture sensitivity level is 1 per J-STD-020.
- What is the lead finish of the BAT54ST diode?
The leads are matte tin plated and solderable per MIL-STD-202, Method 208.
- Is the BAT54ST diode used in automotive applications?
Yes, an automotive-compliant version is available under a separate datasheet.
- What are the typical applications of the BAT54ST diode?
Typical applications include power management circuits, switch-mode power supplies, rectifier circuits, and ESD protection circuits.
