# HSM15.TCT

**HXY MOSFET** · Electrostatic And Surge Protection (TVS/ESD) · SOT-23

HSM15.TCT from HXY MOSFET, 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 | I/O1 | passive | Protected line 1 (cathode of one TVS diode in the circuit diagram); working voltage 15V, can protect one bidirectional line with pin 2 or be used as a unidirectional line. |
| 2 | I/O2 | passive | Protected line 2 (cathode of the second TVS diode in the circuit diagram); working voltage 15V, can protect one bidirectional line with pin 1 or be used as a unidirectional line. |
| 3 | COMMON | passive | Common node joining the anodes of both diodes in the circuit diagram, typically tied to ground for unidirectional protection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | SOT-23 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Working Voltage | VRWM |  |  | 15 | V |  | 2 |
| Reverse Breakdown Voltage | VBR | 16.7 |  |  | V | IT = 1mA | 2 |
| Reverse Leakage Current | IR |  |  | 1 | μA | VRWM = 15V | 2 |
| Clamping Voltage | VC |  |  | 24 | V | IPP = 1A, tp = 8/20μs | 2 |
| Clamping Voltage | VC |  |  | 38 | V | IPP = 10A, tp = 8/20μs | 2 |
| Junction Capacitance | CJ |  | 60 | 85 | pF | VR = 0V, f = 1MHz | 2 |
| Peak Pulse Power | PPP |  |  | 350 | W | tp = 8/20μs | 1 |
| Maximum lead temperature for soldering | TL |  |  | 260 | °C | during 10s | 1 |
| Storage Temperature Range | Tstg | -55 |  | 155 | °C |  | 1 |
| Operating Temperature Range | Top | -40 |  | 125 | °C |  | 1 |
| Maximum junction temperature | Tj |  |  | 150 | °C |  | 1 |
| ESD air discharge | IEC61000-4-2 | -30 |  | 30 | KV | air discharge | 1 |
| ESD contact discharge | IEC61000-4-2 | -30 |  | 30 | KV | contact discharge | 1 |
| EFT | IEC61000-4-4 |  |  | 40 | A | 5/50 ns | 1 |

## CAD (KiCad official)

- Symbol: `HSM15.TCT`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `hsm15-tct-etched.step` / `hsm15-tct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hsm15-tct.step` / `hsm15-tct.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HXY MOSFET datasheet](docs/hsm15-tct-datasheet.pdf) (4 pp, sha256 `9f87438fb1ad970b`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/hsm15-tct-datasheet.pdf)