# SRT40U150CT

**YFW** · Schottky Diodes · TO-220AB

SRT40U150CT from YFW, in a TO-220AB. 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 | A1 | passive | Anode of the first Schottky diode leg (20 A per leg, 150 V VRRM). |
| 2 | K | passive | Common cathode of both diode legs, also connected to the mounting tab; total average forward current 40 A. |
| 3 | A2 | passive | Anode of the second Schottky diode leg (20 A per leg, 150 V VRRM). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | TO-220AB |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM |  |  | 150 | V |  | 1 |
| Working Peak Reverse Voltage | VRWM |  |  | 105 | V |  | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 150 | V |  | 1 |
| Maximum Average Forward Rectified Current | IO |  |  | 20 | A | Per Leg | 1 |
| Maximum Average Forward Rectified Current | IO |  |  | 40 | A | Total | 1 |
| Peak Forward Surge Current | IFSM |  |  | 300 | A | 8.3 ms single half sine-wave, superimposed on rated load (JEDEC method) | 1 |
| Operating Temperature Range | TJ | -50 |  | 150 | °C |  | 1 |
| Storage Temperature Range | TSTG | -50 |  | 150 | °C |  | 1 |
| Maximum Reverse Current | IR |  | 5 | 20 | µA | VR=150V, TA=25°C | 1 |
| Maximum Reverse Current | IR |  | 5 |  | mA | VR=150V, TA=125°C | 1 |
| Typical Thermal Resistance, junction to case | RθJC |  | 2 |  | °C/W | Per leg, mounted on heatsink; printed as 2/4 for TO-220AB,TO-263/TO-220F; value 2 applies to TO-220AB (this MPN) | 1 |
| Forward Voltage Drop | VF |  | 0.57 |  | V | IF=5A, TA=25°C | 1 |
| Forward Voltage Drop | VF |  | 0.5 |  | V | IF=5A, TA=125°C | 1 |
| Forward Voltage Drop | VF |  | 0.73 |  | V | IF=10A, TA=25°C | 1 |
| Forward Voltage Drop | VF |  | 0.6 |  | V | IF=10A, TA=125°C | 1 |
| Forward Voltage Drop | VF |  | 0.7 |  | V | IF=20A, TA=125°C | 1 |

## CAD (KiCad official)

- Symbol: `SRT40U150CT`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220AB (KiCad packages3D, STEP)
- 3D model files: `srt40u150ct-etched.step` / `srt40u150ct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `srt40u150ct.step` / `srt40u150ct.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590919850778968064) (4 pp, sha256 `1540dcfc7ce13f56`, retrieved 2026-10-19, 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/srt40u150ct-datasheet.pdf)