BAS21

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BAS21

+BOM

DIODE GEN PURP 250V 200MA SOT23

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Specifications

Attribute Value
Package / Case Tape & Reel (TR),Cut Tape (CT)
Part Status Obsolete
Diode Type Standard
Voltage - DC Reverse (Vr) (Max) 250 V
Current - Average Rectified(Io) 200mA
Voltage - Forward (Vf) (Max) @ If 1.25 V @ 200 mA
Speed Small Signal =< 200mA (Io), Any Speed
Reverse Recovery Time (trr) 50 ns
Current - Reverse Leakage @ Vr 100 nA @ 200 V
Capacitance @ Vr F 5pF @ 0V, 1MHz
Mounting Type Surface Mount
Supplier Device Package SOT-23-3

Overview

Equivalent

The BAS21, a switching diode, has several equivalents:
- 1N4148 (common general-purpose diode)
- 1N914 (similar specs to 1N4148)
- BAV21 (higher voltage rating)
- BAT54 (Schottky alternative for faster switching)
Check datasheets for exact voltage/current ratings. Other options include LL4148 (SMD version of 1N4148) and MMBD4148. Always verify compatibility for your circuit.

Features

The BAS21 is a general-purpose switching diode with the following key features:
- Type: Silicon epitaxial planar diode
- Package: SOD-323 (small surface-mount)
- Max Reverse Voltage (VR): 250V
- Max Forward Current (IF): 200mA
- Forward Voltage (VF): ~1V at 10mA
- Reverse Recovery Time (trr): 4ns (fast switching)
- Applications: High-speed switching, rectification, clamping, and protection circuits
It is commonly used in low-power circuits, signal processing, and high-frequency applications due to its fast response and compact size.

Application

The BAS21 is a high-speed switching diode commonly used in:
1. Signal Demodulation – Extracting signals in RF and communication circuits.
2. Switching Circuits – Fast switching in digital and logic circuits.
3. Protection Circuits – Clamping and transient voltage suppression.
4. Rectification – Low-power AC-to-DC conversion.
5. High-Frequency Applications – Mixers, detectors, and modulators in RF systems.
Its small-signal performance and fast recovery make it suitable for high-speed applications.

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