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MJD31C

Public Made by Adom

by adom

Changjing Bipolar (BJT), TO-252-2L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs mjd31c: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
viewers mjd31c: viewers · Ray 24d ago
mjd31c-etched.glb mjd31c: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
mjd31c-etched.step mjd31c: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
mjd31c-hero.glb mjd31c: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
mjd31c-hero.overlay.json mjd31c: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
mjd31c.glb Publish 0.1.0 · Ray 24d ago
mjd31c.kicad_mod Publish 0.1.0 · Ray 24d ago
mjd31c.kicad_sym Publish 0.1.0 · Ray 24d ago
mjd31c.lbr Publish 0.1.0 · Ray 24d ago
mjd31c.step Publish 0.1.0 · Ray 24d ago
package.json mjd31c: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
page.json mjd31c: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 17d ago
README.md mjd31c: specified limits as data (metadata.characteristics, 18 rows from the datasheet) · Ray 17d ago

MJD31C

Changjing · Bipolar (BJT) · TO-252-2L

MJD31C from Changjing, in a TO-252-2L. 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 NPN transistor; the datasheet gives no separate base current limit, and the emitter-base breakdown voltage V(BR)EBO is specified at 5 V minimum.
2 COLLECTOR passive Collector terminal of the NPN transistor, rated for a collector-base voltage VCBO of 100 V, a collector-emitter voltage VCEO of 100 V, and continuous collector current IC of 3 A.
3 EMITTER passive Emitter terminal of the NPN transistor, with the emitter-base voltage VEBO rated at 5 V.

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-252-2L
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
Collector-base breakdown voltage V(BR)CBO 100 V IC= 1mA, IE=0 1
Collector-emitter breakdown voltage VCEO(sus) 100 V IC= 30mA, IB=0 1
Emitter-base breakdown voltage V(BR)EBO 5 V IE= 1mA, IC=0 1
Collector cut-off current ICES 20 μA VCE=100V, VEB=0 1
Collector cut-off current ICEO 50 μA VCE= 60V, IB= 0 1
Emitter cut-off current IEBO 1 mA VEB=5V, IC=0 1
DC current gain hFE(1) 25 VCE= 4V, IC= 1A 1
DC current gain hFE(2) 15 75 VCE=4 V, IC= 3A 1
Transition frequency fT 3 MHZ VCE=10V , IC=0.5A,fT=1KHz 1
Collector-emitter saturation voltage VCE(sat) 1.2 V IC=3A, IB=0.375A 1
Base-emitter voltage VBE(on) 1.8 V VCE= 4V, IC=3A 1
Collector-Base Voltage VCBO 100 V 1
Collector-Emitter Voltage VCEO 100 V 1
Emitter-Base Voltage VEBO 5 V 1
Collector Current -Continuous IC 3 A 1
Collector Power Dissipation PC 1.25 W 1
Junction Temperature TJ 150 ℃ 1
Storage Temperature Tstg -65 150 ℃ 1

CAD (KiCad official)

  • Symbol: MJD31C
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2L (KiCad packages3D, STEP)
  • 3D model files: mjd31c-etched.step / mjd31c-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mjd31c.step / mjd31c.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (3 pp, sha256 943fe0022b98e97a, retrieved 2026-10-09, 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