component

BRMMBT5551Q

Public Made by Adom

by adom

Foshan Blue Rocket Elec Bipolar Transistors - BJT, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttriode-mos tube-transistorbrmmbt5551qfactory-2.0.0extractor-text

Verified BRMMBT5551Q

by Ray · last 4 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

4 Nov 2026RayPublished by the parts factory: tier lcsc, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BRMMBT5551Q · SOT-23 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 6-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-limdhdyz/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ brmmbt5551q.kicad_sym✓ brmmbt5551q.kicad_mod✓ brmmbt5551q.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 1d ago
viewers brmmbt5551q: viewers · Ray 1d ago
brmmbt5551q-etched.glb Publish 0.1.0 · Ray 1d ago
brmmbt5551q-etched.step brmmbt5551q: factory component page (tier=lcsc) · Ray 1d ago
brmmbt5551q-hero.glb brmmbt5551q: hero GLB from the etched model (keeps the MPN mark) · Ray 1d ago
brmmbt5551q-hero.overlay.json Publish 0.1.0 · Ray 1d ago
brmmbt5551q.glb Publish 0.1.0 · Ray 1d ago
brmmbt5551q.kicad_mod Publish 0.1.0 · Ray 1d ago
brmmbt5551q.kicad_sym Publish 0.1.0 · Ray 1d ago
brmmbt5551q.lbr Publish 0.1.0 · Ray 1d ago
brmmbt5551q.step Publish 0.1.0 · Ray 1d ago
package.json Publish 0.1.0 · Ray 1d ago
page.json Set visibility: public · Ray 1d ago
README.md Publish 0.1.0 · Ray 1d ago
verification.json Verified: Published by the parts factory: tier lcsc, 3 pins · Ray 1d ago

BRMMBT5551Q

Foshan Blue Rocket Elec · Bipolar Transistors - BJT · SOT-23

BRMMBT5551Q from Foshan Blue Rocket Elec, in a SOT-23. 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 passive Base terminal of the NPN transistor, with absolute maximum base current IB of 300 mA.
2 Emitter passive Emitter terminal of the NPN transistor, with absolute maximum emitter-to-base voltage VEBO of 6.0 V.
3 Collector passive Collector terminal of the NPN transistor, with absolute maximum limits of VCBO 180 V, VCEO 160 V, collector current IC 600 mA and collector power dissipation PC 300 mW.

Key specifications

Parameter Value
Manufacturer Foshan Blue Rocket Elec
Package SOT-23
Category Triode/MOS Tube/Transistor
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 IC 600 mA 2
Base Current IB 300 mA 2
Collector Power Dissipation PC 300 mW 2
Junction Temperature Tj 150 ℃ 2
Storage Temperature Range Tstg -55 150 ℃ 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
DC Current Gain hFE(1) hFE(1) 50 200 400 VCE=5.0V IC=10mA 2
DC Current Gain hFE(2) hFE(2) 20 160 VCE=5.0V IC=50mA 2
DC Current Gain hFE(3) hFE(3) 40 190 VCE=5.0V IC=1.0mA 2
Collector-Emitter Saturation Voltage VCE(sat)(1) VCE(sat)(1) 0.06 0.15 V IC=10mA IB=1.0mA 2
Collector-Emitter Saturation Voltage VCE(sat)(2) VCE(sat)(2) 0.09 0.3 V IC=50mA IB=5.0mA 2
Base-Emitter Saturation Voltage VBE(sat)(1) VBE(sat)(1) 0.7 1 V IC=10mA IB=1.0mA 2
Base-Emitter Saturation Voltage VBE(sat)(2) VBE(sat)(2) 0.8 1 V IC=50mA IB=5.0mA 2
Base-Emitter Voltage VBE 0.68 0.75 V VCE=5.0V IC=10mA 2
Transition Frequency fT 50 110 MHz VCE=10V IC=10mA 2
Collector 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 IB 300 mA Collector Power Dissipation PC 300 mW 2

CAD (KiCad official)

  • Symbol: BRMMBT5551Q
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: brmmbt5551q-etched.step / brmmbt5551q-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); brmmbt5551q.step / brmmbt5551q.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 38a6a67613c4e133, retrieved 2026-11-04, 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