# MBR3045CS

**YFW** · Schottky Diodes · TO-252

MBR3045CS from YFW, in a TO-252. 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 (15 A per leg average forward current, 45 V maximum repetitive peak reverse voltage). |
| 2 | K | passive | Common cathode of both Schottky legs, also connected to the mounting tab (45 V maximum DC blocking voltage, 30 A total average forward current). |
| 3 | A2 | passive | Anode of the second Schottky diode leg (15 A per leg average forward current, 45 V maximum repetitive peak reverse voltage). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | TO-252 |
| 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 |
|---|---|---|---|---|---|---|---|
| Forward Voltage Drop, IF=10A, TA=25°C (max) | VF |  |  | 0.61 | V | IF=10A, TA=25°C; pulse test 300 µs, 1% duty (Note2) | 1 |
| Forward Voltage Drop, IF=15A, TA=25°C (max) | VF |  |  | 0.7 | V | IF=15A, TA=25°C; pulse test 300 µs, 1% duty (Note2) | 1 |
| Maximum Reverse Current, TA=25°C (max) | IR |  |  | 50 | µA | VR=45V, TA=25°C | 1 |
| Maximum Repetitive Peak Reverse Voltage | VRRM |  |  | 45 | V |  | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 45 | V |  | 1 |
| Maximum Average Forward Rectified Current, per leg | Io |  |  | 15 | A | Per Leg | 1 |
| Maximum Average Forward Rectified Current, total | Io |  |  | 30 | A | Total | 1 |
| Peak Forward Surge Current | IFSM |  |  | 300 | A | 8.3ms Single Half Sine-wave | 1 |
| Operating Temperature Range | TJ |  |  | 150 | °C |  | 1 |
| Storage Temperature Range | TSTG | -40 |  | 150 | °C |  | 1 |
| Typical Thermal Resistance, junction to ambient (RθJA), printed as '2/4' for RθJA/RθJC | RθJA |  | 2 |  | °C/W | Printed under TO-220AB,TO-263,TO-252,TO-251 (value cell '2/4' shared with TO-220F); positional reading | 1 |
| Typical Thermal Resistance, junction to case (RθJC), printed as '2/4' for RθJA/RθJC | RθJC |  | 4 |  | °C/W | Junction to case per leg mounted on heatsink (Note1); printed under TO-220AB,TO-263,TO-252,TO-251 (value cell '2/4' shared with TO-220F); positional reading | 1 |

## CAD (KiCad official)

- Symbol: `MBR3045CS`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `mbr3045cs-etched.step` / `mbr3045cs-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mbr3045cs.step` / `mbr3045cs.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/8590922124796243968) (5 pp, sha256 `fbb7584da5282308`, retrieved 2026-10-18, 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/mbr3045cs-datasheet.pdf)