component

2SD1857L-Q-T92-B

Public Made by Adom

by adom

UTC Unisonic Tech Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistors-thyristors2sd1857l-q-t92-bfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 7d ago
viewers 2sd1857l-q-t92-b: viewers · Ray 7d ago
2sd1857l-q-t92-b-etched.glb Publish 0.1.0 · Ray 7d ago
2sd1857l-q-t92-b-etched.step 2sd1857l-q-t92-b: factory component page (tier=lcsc) · Ray 7d ago
2sd1857l-q-t92-b-hero.glb 2sd1857l-q-t92-b: hero GLB from the etched model (keeps the MPN mark) · Ray 7d ago
2sd1857l-q-t92-b-hero.overlay.json Publish 0.1.0 · Ray 7d ago
2sd1857l-q-t92-b.glb Publish 0.1.0 · Ray 7d ago
2sd1857l-q-t92-b.kicad_mod Publish 0.1.0 · Ray 7d ago
2sd1857l-q-t92-b.kicad_sym Publish 0.1.0 · Ray 7d ago
2sd1857l-q-t92-b.lbr Publish 0.1.0 · Ray 7d ago
2sd1857l-q-t92-b.step Publish 0.1.0 · Ray 7d ago
package.json Publish 0.1.0 · Ray 7d ago
page.json Set visibility: public · Ray 7d ago
README.md Publish 0.1.0 · Ray 7d ago

2SD1857L-Q-T92-B

UTC Unisonic Tech · Bipolar (BJT) · TO-92

2SD1857L-Q-T92-B from UTC Unisonic Tech, 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 E passive Emitter terminal of the NPN transistor; the datasheet rates emitter-base voltage VEBO at 5 V max and BVEBO at 5 V (IE=50µA).
2 C passive Collector terminal of the NPN transistor; rated VCEO 120 V and VCBO 120 V, continuous IC 2 A, peak ICP 3 A, and TO-92 collector power dissipation PC 0.625 W.
3 B passive Base terminal of the NPN transistor; DC current gain hFE is 82 to 390 at VCE=5V, IC=0.1A, with rank Q at 120-270.

Key specifications

Parameter Value
Manufacturer UTC Unisonic Tech
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
Collector-Base Breakdown Voltage BVCBO 120 V IC=50µA 3
Collector-Emitter Breakdown Voltage BVCEO 120 V IC=1mA 3
Emitter-Base Breakdown Voltage BVEBO 5 V IE=50µA 3
Collector Cut-Off Current ICBO 1 µA VCB=100V 3
Emitter Cut-Off Current IEBO 1 µA VEB=4V 3
DC Current Transfer Ratio hFE 82 390 VCE=5V, IC=0.1A 3
Collector-Emitter Saturation Voltage VCE(SAT) 0.4 V IC=/IB=1A/0.1A (Note) 3
Transition Frequency fT 80 MHz VCE=5V, IE= -0.1A, f=30MHz. 3
Output Capacitance COB 20 pF VCB=10V, IE=0A, f=1MHz (Note) 3
Collector-Base Voltage VCBO 120 V 3
Collector-Emitter Voltage VCEO 120 V 3
Emitter-Base Voltage VEBO 5 V 3
Collector Current IC 2 A 3
Collector Current (pulse) ICP 3 A 3
Collector Power Dissipation PC 0.625 W TO-92 3
Junction Temperature TJ 150 °C 3
Storage Temperature TSTG -40 150 °C 3

CAD (KiCad official)

  • Symbol: 2SD1857L-Q-T92-B
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: 2sd1857l-q-t92-b-etched.step / 2sd1857l-q-t92-b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2sd1857l-q-t92-b.step / 2sd1857l-q-t92-b.glb are the bare package body.

Provenance

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

  • Datasheet: UTC Unisonic Tech datasheet (4 pp, sha256 3f19025064c70e0a, 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