# MURA140T3G

**onsemi** · Fast Recovery / High Efficiency Diodes · SMA

MURA140T3G from onsemi, in a SMA. 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 | CATHODE | passive | Cathode lead, marked by the polarity band on the package (per Style 1: Pin 1 = Cathode, polarity band); the datasheet states the polarity band indicates the cathode lead. |
| 2 | ANODE | passive | Anode lead, the opposite terminal of the rectifier to the polarity-banded cathode (per Style 1: Pin 2 = Anode). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SMA |
| Category | Diodes |
| Pins | 2 |

## 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 Instantaneous Forward Voltage (TJ = 150°C) | vF |  |  | 0.8 | V | iF = 1.0 A, TJ = 150°C | 2 |
| Maximum Instantaneous Forward Voltage (TJ = 25°C) | vF |  |  | 1.1 | V | iF = 1.0 A, TJ = 25°C | 2 |
| Maximum Instantaneous Reverse Current (TJ = 150°C) | iR |  |  | 150 | μA | Rated DC Voltage, TJ = 150°C | 2 |
| Maximum Instantaneous Reverse Current (TJ = 25°C) | iR |  |  | 5 | μA | Rated DC Voltage, TJ = 25°C | 2 |
| Maximum Reverse Recovery Time | trr |  |  | 65 | ns | iF = 1.0 A, di/dt = 50 A/μs | 2 |
| Peak Repetitive Reverse Voltage (MURA140T3G column) | VRRM |  |  | 400 | V |  | 2 |
| Working Peak Reverse Voltage (MURA140T3G column) | VRWM |  |  | 400 | V |  | 2 |
| DC Blocking Voltage (MURA140T3G column) | VR |  |  | 400 | V |  | 2 |
| Average Rectified Forward Current | IF(AV) |  |  | 1 | A | TL = 150°C | 2 |
| Average Rectified Forward Current | IF(AV) |  |  | 2 | A | TL = 125°C | 2 |
| Non-Repetitive Peak Surge Current | IFSM |  |  | 35 | A | Surge applied at rated load conditions, halfwave, single phase, 60 Hz | 2 |
| Operating Junction Temperature Range | TJ | -65 |  | 175 | °C |  | 2 |
| Thermal Resistance, Junction-to-Lead | PsiJL |  |  | 24 | °C/W | TL = 25°C (Note 1) | 2 |
| Thermal Resistance, Junction-to-Ambient | RθJA |  |  | 216 | °C/W | Surface mounted on minimum pad size recommended, PC Board FR-4 (Note 1) | 2 |

## CAD (KiCad official)

- Symbol: `MURA140T3G`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA (KiCad packages3D, STEP)
- 3D model files: `mura140t3g-etched.step` / `mura140t3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mura140t3g.step` / `mura140t3g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588879977916219392) (5 pp, sha256 `7f1031618918f987`, retrieved 2026-10-14, tier: lcsc)
- **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/mura140t3g-datasheet.pdf)