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BAS21 on a board, in 3D

BAS21

Nexperia

1.25V@200mA 100nA@100V 200mA 250V 9A Independent SOT-23 Diodes - General Purpose ROHS

Extended
DatasheetJLCPCBLCSCnexperia/BAS21
Category
Switching Diodes
Package
SOT-23
Pins
3

Overview

The BAS21 is a switching Diode made by Nexperia in a SOT-23 package with 3 pins. 1.25V@200mA 100nA@100V 200mA 250V 9A Independent SOT-23 Diodes - General Purpose ROHS.

PCBKit's library has its KiCad symbol (Diode:BAS21, from KiCad's library) and its footprint (Package_TO_SOT_SMD:SOT-23, from KiCad's library), ready for a KiCad board. 28,515 are in stock at JLCPCB (part C8661). 20 open-source boards in 19 repositories on GitHub use it.

Symbol

Diode:BAS21From KiCad's library

Footprint

123
Package_TO_SOT_SMD:SOT-23From KiCad's library

From the datasheet

8
Reverse voltage, most
200 V · VR, continuous reverse voltage, absolute max · p. 3
Forward current, most
200 mA · IF, continuous, absolute max · p. 3
Forward voltage
1 V · IF = 100 mA, Tj = 25 °C, max · p. 1
Forward voltage
1.25 V · IF = 200 mA, Tj = 25 °C, max · p. 1
Works from
-55 °C · Tamb, ambient temperature, min · p. 3
Works up to
150 °C · Tamb, ambient temperature, max · p. 3
Junction, hottest
150 °C · Tj, junction temperature, absolute max · p. 3
Junction to air (SOT23)
500 K/W · Junction to ambient, FR4 printed-circuit board, max · p. 3

Parameters

12
Current - Rectified
200mA
Diode Configuration
Standalone
Junction Temperature(Max)
150℃
Non-Repetitive Peak Forward Surge Current
9A
Operating Junction Temperature Range
-55℃~+150℃
Pd - Power Dissipation
250mW
Reverse Leakage Current (Ir)
100nA@200V
Reverse Recovery Time (trr)
50ns
Thermal Resistance(Junction to Ambient)
500℃/W
Voltage - DC Reverse(Vr)
200V
Voltage - Forward(Vf)
1V
Voltage - Forward(Vf@If)
1.25V@200mA

Order codes

2

Pinout

3
The pins of the BAS21
PinNameType
1APassive
2NCNot connected
3KPassive

Open-source boards using it

All 20
  • 2 layers50 × 50 mmFilmolino, the printed circuit board in 3D

    Filmolino

    filmolino/SlideScanner

    The Filmolino SlideScanner is a device that makes it easy to scan slides in magazines fully automated using a modified slide projector and a digital camera.

    37 parts28GPL-3.0
  • 2 layers80 × 38.1 mmMotor v3, the printed circuit board in 3D

    Motor v3

    UoM-Robotics-Society/ROV-project

    Software, mechanical design and hardware for ROV

    92 parts14
  • 4 layers252 × 152 mmCTA control board, the printed circuit board in 3D

    CTA control board

    PySpice-org/eda-rw

    Python library to read/write KiCad and LibrePCB Sexpr file format

    619 parts9
  • 2 layers83.5 × 97.5 mmTeleprinterHat, the printed circuit board in 3D

    TeleprinterHat

    MattisLind/teleprinterHat

    A RaspberryPi HAT that interfaces a old school teleprinter

    145 parts6
  • 4 layers240 × 90.5 mmBILLEE Rover Control Module V1, the printed circuit board in 3D

    BILLEE Rover Control Module V1

    BILLEE-BroncoSTAR/billee-hardware-2027

    Hardware and firmware Repository for BILLEE URC 2027

    276 parts1MIT
  • 2 layers95 × 80 mmElectrolumino rev0, the printed circuit board in 3D

    Electrolumino rev0

    cl0rm/ElectroLumino

    Portable Mulit-Channel programmable EL wire driver featuring PWM

    90 parts1GPL-3.0
  • 2 layers91 × 87 mmHarmonic jerkulator, the printed circuit board in 3D

    Harmonic jerkulator

    Randagodron/harmonic-jerkulator

    Fuzz stompbox for electric guitar

    45 parts1
  • 6 layers105.6 × 100.9 mmSimpleCarrier, the printed circuit board in 3D

    SimpleCarrier

    alexian79/simpleCarrier

    146 partsBSD-2-Clause

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Questions

Is there a KiCad symbol and footprint for the BAS21?

Yes. The symbol is Diode:BAS21 and the footprint Package_TO_SOT_SMD:SOT-23, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the BAS21?

SOT-23, with 3 pins. Its footprint is drawn on this page.

Where is the BAS21 datasheet?

Nexperia publishes it: the Datasheet link on this page opens it.

Where can I order the BAS21?

JLCPCB lists it as part C8661, with 28,515 in stock; the sellers' links on this page open their listings.

What can replace the BAS21?

Parts like it in the library: the BAS21-QR by Nexperia, the MMBD1503A by Jiangsu Changjing Electronics Technology (CJ), the BAV23S by Nexperia and the BAS21 by Diodes Incorporated. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the BAS21?

20 boards in 19 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8