# BFP420H6327

**Infineon Technologies** · Bipolar (BJT) · SOT-343

BFP420H6327 from Infineon Technologies, in a SOT-343. 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 | B | input | Base terminal for biasing and RF signal input; maximum base current 9 mA. |
| 2 | E | power_in | Emitter terminal for DC and RF return path; maximum reverse emitter-base voltage VEBO of 1.5 V. |
| 3 | C | output | Collector terminal for RF signal output; maximum collector current IC of 60 mA at VCEO of 4.5 V open base. |
| 4 | E | power_in | Emitter terminal for DC and RF return path; maximum reverse emitter-base voltage VEBO of 1.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Infineon Technologies |
| Package | SOT-343 |
| Category | Transistors/Thyristors |
| Pins | 4 |

## 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 emitter voltage (open base) | VCEO |  |  | 4.5 | V | Open base | 3 |
| Collector emitter voltage (TA = -55 °C) | VCEO |  |  | 4.1 | V | TA = -55 °C, open base | 3 |
| Collector emitter voltage (E-B short circuited) | VCES |  |  | 15 | V | E-B short circuited | 3 |
| Collector base voltage | VCBO |  |  | 15 | V | Open emitter | 3 |
| Emitter base voltage | VEBO |  |  | 1.5 | V | Open collector | 3 |
| Base current | IB |  |  | 9 | mA |  | 3 |
| Collector current | IC |  |  | 60 | mA |  | 3 |
| Total power dissipation | Ptot |  |  | 210 | mW | TS ≤ 98 °C | 3 |
| Junction temperature | TJ |  |  | 150 | °C |  | 3 |
| Storage temperature | TStg | -55 |  |  | °C |  | 3 |
| Collector emitter breakdown voltage | V(BR)CEO | 4.5 | 5 |  | V | IC = 1 mA, IB = 0, open base | 6 |
| Collector emitter leakage current | ICES |  |  | 10 | μA | VCE = 15 V, VBE = 0, E-B short circuited | 6 |
| Collector base leakage current | ICBO |  |  | 100 | nA | VCB = 5 V, IE = 0, open emitter | 6 |
| Emitter base leakage current | IEBO |  |  | 3 | μA | VEB = 0.5 V, IC = 0, open collector | 6 |
| DC current gain | hFE | 60 | 95 | 130 |  | VCE = 4 V, IC = 20 mA, pulse measured | 6 |
| Transition frequency | fT | 18 | 25 |  | GHz | VCE = 3 V, IC = 30 mA, f = 2 GHz | 6 |
| Collector base capacitance | CCB |  | 0.15 | 0.3 | pF | VCB = 2 V, VBE = 0, f = 1 MHz, emitter grounded | 6 |
| Transducer gain | /S21/² | 14 | 17 |  | dB | IC = 20 mA | 7 |
| Thermal resistance junction - soldering point | RthJS |  | 250 |  | K/W |  | 4 |
| Maximum power gain | Gms |  | 21 |  | dB | IC = 20 mA | 7 |
| Collector emitter capacitance | CCE |  | 0.37 |  | pF | VCE = 2 V, VBE = 0, f = 1 MHz, base grounded | 6 |
| Emitter base capacitance | CEB |  | 0.55 |  | pF | VEB = 0.5 V, VCB = 0, f = 1 MHz, collector grounded | 6 |
| Minimum noise figure | NFmin |  | 1.1 |  | dB | IC = 5 mA | 7 |
| 3rd order intercept point at output | OIP3 |  | 22 |  | dBm | IC = 20 mA, ZS = ZL = 50 Ω | 7 |
| 1 dB gain compression point at output | OP1dB |  | 12 |  | dBm |  | 7 |

## CAD (KiCad official)

- Symbol: `BFP420H6327`
- Footprint: `Package_TO_SOT_SMD:SOT-343_SC-70-4`
- 3D model: SOT-343 (KiCad packages3D, STEP)
- 3D model files: `bfp420h6327-etched.step` / `bfp420h6327-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bfp420h6327.step` / `bfp420h6327.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Infineon Technologies datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757970042510426112) (18 pp, sha256 `d8ef01d0f74643bf`, retrieved 2026-09-23, 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](docs/bfp420h6327-datasheet.pdf)