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BR431

Public Made by Adom

by adom

Foshan Blue Rocket Elec Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BR431

Foshan Blue Rocket Elec · Bipolar (BJT) · TO-92

BR431 from Foshan Blue Rocket Elec, in a TO-92. 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 K passive Cathode of the adjustable shunt regulator, rated for a cathode sink current of 1.0 mA to 100 mA and a continuous cathode current range of -100 to +100 mA.
2 A passive Anode of the adjustable shunt regulator, with a maximum cathode-to-anode voltage rating of 37 V.
3 R input Reference input that sets the output voltage (VO = Vref to 37 V), with a reference voltage of 2.500 V typical and a continuous reference input current range of 0.05 to 10 mA.

Key specifications

Parameter Value
Manufacturer Foshan Blue Rocket Elec
Package TO-92
Category Transistors/Thyristors
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Reference input voltage (A grade, 0.4%) VREF 2.49 2.5 2.51 V VKA=VREF IK=10mA(A=0.4%) 2
Reference input voltage (B grade, 0.8%) VREF 2.48 2.5 2.52 V VKA=VREF IK=10mA(B=0.8%) 2
Off-state cathode current IK(off) 0.05 1 μA VKA=36V VREF=0V 2
Minimum cathode current for regulation IK(min) 0.4 1 mA VKA=VREF 2
Dynamic impedance /ZKA/ 0.15 0.5 Ω VKA=VREF f≤1.0KHz IK=1mA to 100mA 2
Reference input current IREF 1 4 μA IK=10mA R1=10KΩ R2=open 2
Deviation of reference input current over full temperature range ΔIREF/T 0.4 1.2 μA IK=10mA R1=10KΩ, R2=open TA=-40～125℃ 2
Deviation of reference input voltage over temperature ΔVREF/T 4.5 17 mV VKA=VREF IK=10mA TA=-25～85℃ 2
Ratio of change in reference input voltage to change in cathode voltage (10V to VREF) ΔVREF/ΔVKA -1 -2.7 mV/V IK=10mA ΔVKA=10V to VREF 2
Ratio of change in reference input voltage to change in cathode voltage (36V to 10V) ΔVREF/ΔVKA -0.45 -2 mV/V IK=10mA ΔVKA=36V to 10V 2
Cathode to anode voltage VKA 37 V 2
Cathode current range, continuous IK -100 100 mA Continuous 2
Reference input current range, continuous IREF 0.05 10 mA Continuous 2
Power dissipation PD 770 mW Ta=25℃ 2
Operating ambient temperature Tamb -40 125 ℃ 2
Junction temperature Tj 160 ℃ 2
Storage temperature range Tstg -65 150 ℃ 2

CAD (KiCad official)

  • Symbol: BR431
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: br431-etched.step / br431-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); br431.step / br431.glb are the bare package body.

Provenance

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

  • Datasheet: Foshan Blue Rocket Elec datasheet (7 pp, sha256 8412ef2316cede3f, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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