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BFG540

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Slkor SLKORMICRO Elec RF Amplifiers, SOT-143-4. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs bfg540: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
viewers bfg540: viewers · Ray 26d ago
bfg540-etched.fit.json bfg540: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
bfg540-etched.glb bfg540: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
bfg540-etched.step bfg540: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
bfg540.glb Publish 0.1.0 · Ray 26d ago
bfg540.kicad_mod Publish 0.1.0 · Ray 26d ago
bfg540.kicad_sym Publish 0.1.0 · Ray 26d ago
bfg540.lbr Publish 0.1.0 · Ray 26d ago
bfg540.step Publish 0.1.0 · Ray 26d ago
package.json Publish 0.1.0 · Ray 26d ago
page.json Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") · Ray 12d ago
README.md bfg540: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 18d ago

BFG540

Slkor SLKORMICRO Elec · RF Amplifiers · SOT-143-4

BFG540 from Slkor SLKORMICRO Elec, in a SOT-143-4. 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 C passive Collector of NPN transistor. Wide collector lead per SOT143B package. Max IC=120mA, BVCEO=15V, BVCBO=20V.
2 B passive Base of NPN transistor. BVEBO=2.5V. Drives high-gain low-noise RF amplifier operation up to fT=9GHz.
3 E passive Emitter of NPN transistor. Shared with pin 4 (dual emitter leads for improved grounding/thermal performance in SOT143B).
4 E passive Second emitter of NPN transistor, tied internally to pin 3. Dual emitter leads reduce parasitic inductance for microwave LNA use.

Key specifications

Parameter Value
Manufacturer Slkor SLKORMICRO Elec
Package SOT-143-4
Category RF And Wireless
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • BFG540
  • BFG540/X

CAD (KiCad official)

  • Symbol: BFG540
  • Footprint: Package_TO_SOT_SMD:SOT-143
  • 3D model: SOT-143-4 (KiCad packages3D, STEP)
  • 3D model files: bfg540-etched.step / bfg540-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bfg540.step / bfg540.glb are the bare package body.

Provenance

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

  • Datasheet: Slkor SLKORMICRO Elec datasheet (5 pp, sha256 5b47e88954dfd847, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF