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2N5551-B

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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2N5551-B

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

2N5551-B 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 Collector passive Collector terminal of the NPN transistor; the datasheet rates VCBO at 180 V, VCEO at 160 V, and continuous IC at 600 mA.
2 Base passive Base terminal of the NPN transistor; the datasheet rates continuous base current IB at 300 mA and emitter-to-base voltage VEBO at 6.0 V.
3 Emitter passive Emitter terminal of the NPN transistor, the reference for the VEBO 6.0 V emitter-to-base rating.

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
Collector to Base Voltage VCBO 180 V 2
Collector to Emitter Voltage VCEO 160 V 2
Emitter to Base Voltage VEBO 6 V 2
Collector Current - Continuous IC 600 mA 2
Base Current - Continuous IB 300 mA 2
Collector Power Dissipation PC 625 mW 2
Junction Temperature Tj 150 ℃ 2
Storage Temperature Range Tstg -55 150 ℃ 2
DC Current Gain hFE(1) 50 200 400 VCE=5.0V IC=10mA 2
DC Current Gain hFE(2) 20 160 VCE=5.0V IC=50mA 2
DC Current Gain hFE(3) 40 190 VCE=5.0V IC=1.0mA 2
Collector to Emitter Saturation Voltage VCE(sat) (1) 0.06 0.15 V IC=10mA IB=1.0mA 2
Collector to Emitter Saturation Voltage VCE(sat) (2) 0.09 0.3 V IC=50mA IB=5.0mA 2
Base to Emitter Saturation Voltage VBE(sat) (1) 0.7 1 V IC=10mA IB=1.0mA 2
Base to Emitter Saturation Voltage VBE(sat) (2) 0.8 1 V IC=50mA IB=5.0mA 2
Base to Emitter Voltage VBE 0.68 0.75 V VCE=5.0V IC=10mA 2
Collector Cut-Off Current ICBO 0.1 μA VCB=180V IE=0 2
Emitter Cut-Off Current IEBO 0.1 μA VEB=6.0V IC=0 2
Current Gain Bandwidth Product fT 50 110 MHz VCE=10V IC=10mA 2
Output Capacitance Cob 2.2 5 pF VCB=10V IE=0 f=1.0MHz 2
Turn On Time ton 0.3 μs IC=100mA IB1=-IB2=10mA 2
Turn Off Time toff 0.4 μs IC=100mA IB1=-IB2=10mA 2
Storage Time tstg 0.2 μs IC=100mA IB1=-IB2=10mA 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 PC Base Current - Continuous IB 300 mA Collector Power Dissipation PC 625 mW 2

CAD (KiCad official)

  • Symbol: 2N5551-B
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: 2n5551-b-etched.step / 2n5551-b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2n5551-b.step / 2n5551-b.glb are the bare package body.

Provenance

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

  • Datasheet: Foshan Blue Rocket Elec datasheet (6 pp, sha256 0bd23f9c6e012db1, retrieved 2026-10-19, 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