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MJL3281AG

Public Made by Adom

by adom

onsemi Bipolar Transistors - BJT, TO-264-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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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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MJL3281AG

onsemi · Bipolar Transistors - BJT · TO-264-3

MJL3281AG from onsemi, in a TO-264-3. 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 BASE input Base terminal of the MJL3281A NPN device, with continuous base current rated at 1.5 A.
2 COLLECTOR passive Collector terminal, rated for 15 A continuous collector current and 25 A peak (pulse width 5 ms, duty cycle below 10%).
3 EMITTER passive Emitter terminal, with emitter-base voltage rated at 5.0 V.

Key specifications

Parameter Value
Manufacturer onsemi
Package TO-264-3
Category Transistors
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
Collector-Emitter Voltage VCEO 260 Vdc 1
Collector-Base Voltage VCBO 260 Vdc 1
Emitter-Base Voltage VEBO 5 Vdc 1
Collector Current - Continuous IC 15 Adc 1
Collector Current - Peak ICM 25 Adc Note 1 1
Base Current - Continuous IB 1.5 Adc 1
Total Power Dissipation PD 200 Watts TC = 25°C 1
Derate Above 25°C PD 1.43 W/°C Derate above 25°C 1
Operating and Storage Junction Temperature Range TJ, Tstg -65 150 °C 1
Thermal Resistance, Junction-to-Case RθJC 0.625 °C/W 1
Collector-Emitter Sustaining Voltage VCEO(sus) 260 Vdc IC = 100 mAdc, IB = 0 2
Collector Cutoff Current ICBO 50 μAdc VCB = 260 Vdc, IE = 0 2
Emitter Cutoff Current IEBO 5 μAdc VEB = 5 Vdc, IC = 0 2
Second Breakdown Collector with Base Forward Biased IS/b 4 Adc VCE = 50 Vdc, t = 1 s (non-repetitive) 2
Second Breakdown Collector with Base Forward Biased IS/b 1 Adc VCE = 100 Vdc, t = 1 s (non-repetitive) 2
DC Current Gain hFE 75 150 IC = 500 mAdc, VCE = 5 Vdc 2
DC Current Gain hFE 45 IC = 8 Adc, VCE = 5 Vdc 2
Collector-Emitter Saturation Voltage VCE(sat) 3 Vdc IC = 10 Adc, IB = 1 Adc 2
Current-Gain - Bandwidth Product fT 30 MHz IC = 1 Adc, VCE = 5 Vdc, ftest = 1 MHz 2
Output Capacitance Cob 600 pF VCB = 10 Vdc, IE = 0, ftest = 1 MHz 2

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
housing pet Second Breakdown Collector with Base Forward Biased (VCE = 50 Vdc, t = 1 s (non−repetitive) 2

CAD (KiCad official)

  • Symbol: MJL3281AG
  • Footprint: Package_TO_SOT_THT:TO-264-3_Vertical
  • 3D model: TO-264-3 (KiCad packages3D, STEP)
  • 3D model files: mjl3281ag-etched.step / mjl3281ag-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mjl3281ag.step / mjl3281ag.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (5 pp, sha256 961136ac9597cd9a, retrieved 2026-10-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), 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