component

BCR421UW6-7

Public Made by Adom

by adom

Diodes Incorporated LED Drivers, SOT-26. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentdisplay modules - led drivers - display driversbcr421uw6-7factory-2.0.0extractor-text
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3D Model

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Symbol & Footprint

Schematic Symbol

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Datasheet

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Contents

README

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BCR421UW6-7

Diodes Incorporated · LED Drivers · SOT-26

BCR421UW6-7 from Diodes Incorporated, in a SOT-26. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 EN input Enable for biasing the transistor; on the BCR421U it is rated 18V max, draws 1.2mA typ at VEN = 3.3V, and accepts PWM dimming up to 25kHz.
2 OUT passive Regulated output current (LED current sink), rated 40V max and 500mA max, with a 1.4V minimum output voltage.
3 OUT passive Regulated output current (LED current sink), rated 40V max and 500mA max, with a 1.4V minimum output voltage.
4 GND power_in Power ground.
5 OUT passive Regulated output current (LED current sink), rated 40V max and 500mA max, with a 1.4V minimum output voltage.
6 REXT passive Optional external resistor for adjusting the output current from the 10mA preset up to 350mA.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-26
Category Display Modules / LED Drivers / Display Drivers
Pins 6

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Collector-Emitter Breakdown Voltage BVCEO 40 V IC = 1mA 3
DC Current Gain hFE 200 350 500 IC = 50mA; VCE = 1V 3
Internal Resistor RINT 85 105 Ω IRINT = 10mA 3
Output Current (BCR421U) IOUT 9 10 11 mA VOUT = 1.4V; VEN = 3.3V 3
Voltage Drop (VREXT) VDROP 0.85 0.95 1.05 V IOUT = 10mA 3
Enable Voltage (BCR421U) VEN 18 V relative to GND, TA = +25°C 2
Output Current IOUT 500 mA TA = +25°C 2
Output Voltage VOUT 40 V TA = +25°C 2
Reverse Voltage Between all Terminals VR 0.5 V TA = +25°C 2
Power Dissipation (Note 5) PD 1190 mW OUT leads on 50mm x 50mm 1oz copper, TA = +25°C 2
Power Dissipation (Note 6) PD 912 mW OUT leads on 25mm x 25mm 1oz copper, TA = +25°C 2
Thermal Resistance, Junction to Ambient (Note 5) RθJA 105 °C/W 50mm x 50mm 1oz copper 2
Thermal Resistance, Junction to Ambient (Note 6) RθJA 137 °C/W 25mm x 25mm 1oz copper 2
Thermal Resistance, Junction to Lead RθJL 50 °C/W Note 7 2
Recommended Operating Junction Temperature Range TJ -55 150 °C 2
Maximum Operating Junction and Storage Temperature Range TJ, TSTG -65 150 °C 2
ESD Human Body Model (BCR421U) HBM 1000 V JEDEC Class 1C 2
ESD Machine Model (BCR421U) MM 400 V JEDEC Class C 2
Enable Current (BCR421U) IEN 1.2 mA VEN = 3.3V 3
Bias Resistor (BCR421U) RB 1.5 kΩ 3
Output Current at REXT = 5.1Ω (BCR421U) IOUT 150 mA VOUT > 2.0V; VEN = 3.3V 3
Minimum Output Voltage VOUT(MIN) 1.4 V IOUT > 18mA 3
Output Current Change vs. Temperature (BCR421U) ΔIOUT/IOUT -0.2 %/°C VOUT > 2.0V; VEN = 3.3V 3
Output Current Change vs. Supply Voltage (BCR421U) ΔIOUT/IOUT 1 %/V VOUT > 2.0V; VEN = 3.3V 3

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Finish - Matte Tin Plated Leads. Solderable per MIL￾STD-202, Method 208  Weight: 0.018 grams (Approximate) 1

CAD (KiCad official)

  • Symbol: BCR421UW6-7
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-26 (KiCad packages3D, STEP)
  • 3D model files: bcr421uw6-7-etched.step / bcr421uw6-7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bcr421uw6-7.step / bcr421uw6-7.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Diodes Incorporated datasheet (13 pp, sha256 1effe8208a803680, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF