# BUL1102EFP

**STMicroelectronics** · Bipolar (BJT) · TO-220FP

BUL1102EFP from STMicroelectronics, in a TO-220FP. 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 | B | input | Base terminal; the datasheet rates base current at IB 2 A continuous and IBM 4 A peak (tP < 5 ms). |
| 2 | C | passive | Collector terminal; rated at VCES 1100 V (VBE = 0), VCEO 450 V, IC 4 A continuous and ICM 8 A peak (tP < 5 ms). |
| 3 | E | passive | Emitter terminal; the datasheet specifies VEBO 12 V (IC = 0) as the emitter-base limit. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-220FP |
| 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 cut-off current | ICES |  |  | 100 | µA | VCE =1100 V (VBE = 0) | 3 |
| Emitter cut-off current | IEBO |  |  | 1 | mA | VEB = 12 V (IC = 0) | 3 |
| Collector-emitter sustaining voltage (IB=0) | VCEO(sus) | 450 |  |  | V | IC = 100 mA | 3 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 1.5 | V | IC = 2 A, IB = 400 mA | 3 |
| Base-emitter saturation voltage | VBE(sat) |  |  | 1.5 | V | IC = 2 A, IB = 400 mA | 3 |
| DC current gain | hFE | 35 |  | 70 |  | IC = 250 mA, VCE = 5 V | 3 |
| DC current gain (BUL1102EFP) | hFE | 12 |  | 23 |  | IC = 2 A, VCE = 5 V | 3 |
| Avalanche energy | Ear | 6 |  |  | mJ | L = 2 mH, C = 1.8 nF, IBR ≤ 2.5 A, 25 °C < TC < 125 °C | 3 |
| Collector-emitter voltage (VBE = 0) | VCES |  |  | 1100 | V | VBE = 0 | 2 |
| Collector-emitter voltage (IB = 0) | VCEO |  |  | 450 | V | IB = 0 | 2 |
| Emitter-base voltage | VEBO |  |  | 12 | V | IC = 0 | 2 |
| Collector current | IC |  |  | 4 | A |  | 2 |
| Collector peak current | ICM |  |  | 8 | A | tP < 5 ms | 2 |
| Base current | IB |  |  | 2 | A |  | 2 |
| Base peak current | IBM |  |  | 4 | A | tP < 5 ms | 2 |
| BUL1102EFP total dissipation | PTOT |  |  | 30 | W | TC = 25 °C | 2 |
| BUL1102EFP insulation withstand voltage (RMS) | VISO |  |  | 1500 | V | from all three leads to external heatsink | 2 |
| Storage temperature | TSTG | -65 |  | 150 | °C |  | 2 |
| Max. operating junction temperature | TJ |  |  | 150 | °C |  | 2 |
| BUL1203EFP thermal resistance junction-case | RthJC |  |  | 4.2 | °C/W |  | 2 |

## CAD (KiCad official)

- Symbol: `BUL1102EFP`
- Footprint: `Package_TO_SOT_THT:TO-220F-3_Vertical`
- 3D model: TO-220FP (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/bul1102efp.pdf) (13 pp, sha256 `579a0e430565d66a`, retrieved 2026-11-12, tier: manufacturer)
- **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](docs/bul1102efp-datasheet.pdf)