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MJD112

Public Made by Adom

by adom

Changjing Darlington Transistors, 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
Name Last commit message Last updated
docs mjd112: 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 23d ago
viewers mjd112: viewers · Ray 1mo ago
mjd112-etched.fit.json mjd112: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
mjd112-etched.glb mjd112: 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 23d ago
mjd112-etched.step mjd112: 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 23d ago
mjd112.glb Publish 0.1.0 · Ray 1mo ago
mjd112.kicad_mod Publish 0.1.0 · Ray 1mo ago
mjd112.kicad_sym Publish 0.1.0 · Ray 1mo ago
mjd112.lbr Publish 0.1.0 · Ray 1mo ago
mjd112.step Publish 0.1.0 · Ray 1mo ago
package.json mjd112: 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 23d ago
page.json mjd112: 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 23d ago
README.md mjd112: specified limits as data (metadata.characteristics, 23 rows from the datasheet) · Ray 25d ago

MJD112

Changjing · Darlington Transistors · TO-252-2L

MJD112 from Changjing, in a TO-252-2L. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 BASE input Control input terminal for Darlington NPN transistor; maximum emitter-base voltage 5V, typical base-emitter voltage 2.8V at IC=2A VCE=3V, DC current gain minimum 500 at IC=500mA.
2 COLLECTOR input Main current terminal; maximum collector-emitter voltage 100V, maximum collector-base voltage 100V, maximum continuous collector current 2A, maximum power dissipation 1W.
3 EMITTER output Current return terminal; maximum emitter-base voltage 5V, typical emitter cut-off current 2mA at VEB=5V.

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 V(BR)CEO 100 V IC =30mA,IB=0 1
Emitter-base breakdown voltage V(BR)EBO 5 V IE=5mA,IC=0 1
Collector cut-off current ICBO 20 µA VCB=100V,IE=0 1
Collector-emitter cut-off current ICEO 20 µA VCE=50V,IE=0 1
Emitter cut-off current IEBO 2 mA VEB=5V,IC=0 1
DC current gain hFE(1) hFE(1) 500 VCE=3V,IC=500mA 1
DC current gain hFE(2) hFE(2) 1000 12000 VCE=3V,IC=2A 1
DC current gain hFE(3) hFE(3) 200 VCE=3V,IC=4A 1
Collector-emitter saturation voltage VCE(sat)1 VCE(sat)1 2 V IC=2A,IB=8mA 1
Collector-emitter saturation voltage VCE(sat)2 VCE(sat)2 3 V IC=4A,IB=40mA 1
Base-emitter voltage VBE 2.8 V VCE=3V,IC=2A 1
Transition frequency fT 25 MHz VCE=10V,IC=0.75A,f=1MHz 1
Collector output capacitance Cob 100 pF VCB=10V,IE=0,f=0.1MHz 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 2 A 1
Collector power dissipation PC 1 W 1
Junction temperature TJ 150 ℃ 1
Storage temperature Tstg -55 150 ℃ 1
Thermal resistance, junction to case RθJC 6.25 ℃/W 1
Thermal resistance, junction to ambient RθJA 71.4 ℃/W 1

CAD (KiCad official)

  • Symbol: MJD112
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2L (KiCad packages3D, STEP)
  • 3D model files: mjd112-etched.step / mjd112-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mjd112.step / mjd112.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (4 pp, sha256 56a21527a3aeb20a, retrieved 2026-09-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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