# MURB1040CT

**Suzhou Good Ark Elec** · Fast Recovery / High Efficiency Diodes · TO-263-2

MURB1040CT from Suzhou Good Ark Elec, in a TO-263-2. 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 diode (PIN 1); this leg is rated 5 A average forward current at Tc=105°C and 400 V VRRM. |
| 2 | A2 | passive | Anode of the second diode (PIN 2); this leg is rated 5 A average forward current at Tc=105°C and 400 V VRRM. |
| TAB | K | passive | Common cathode of both diodes, connected to the heatsink tab (labelled K and HEATSINK); the device is rated 10 A total. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Suzhou Good Ark Elec |
| Package | TO-263-2 |
| 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 |  |  | 400 | V |  | 1 |
| Working peak reverse voltage | VRWM |  |  | 400 | V |  | 1 |
| Maximum DC blocking voltage | VDC |  |  | 400 | V |  | 1 |
| Maximum average forward rectified current | IF(AV) |  |  | 10 | A | Tc=105°C, total device | 1 |
| Maximum average forward rectified current | IF(AV) |  |  | 5 | A | Tc=105°C, per diode | 1 |
| Peak forward surge current | IFSM |  |  | 90 | A | 8.3ms single half sine-wave superimposed on rated load, per diode | 1 |
| Voltage rate of change (rated VR) | DV/dt |  |  | 10000 | V/us | rated VR | 1 |
| Operating junction temperature range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage temperature range | TSTG | -55 |  | 150 | °C |  | 1 |
| Lead temperature for soldering purposes |  |  |  | 260 | °C | for 10 sec | 1 |
| Maximum reverse recover time | Trr |  |  | 35 | ns | If=0.5Amp, IR=1.0Amp, Irec=0.25Amp | 1 |
| Maximum instantaneous forward voltage per leg | VF |  |  | 1.4 | V | IF=5A, TC=25°C | 1 |
| Maximum instantaneous forward voltage per leg | VF |  |  | 1.3 | V | IF=5A, TC=125°C | 1 |
| Maximum reverse current per leg at working peak reverse voltage | IR |  |  | 10 | uA | TJ=25°C | 1 |
| Maximum reverse current per leg at working peak reverse voltage | IR |  |  | 500 | uA | TJ=100°C | 1 |
| Thermal resistance, junction to case per leg | RθJC |  | 2 |  | °C/W | per leg | 1 |
| Thermal resistance, junction to ambient per leg | RθJA |  | 62.5 |  | °C/W | per leg | 1 |

## CAD (KiCad official)

- Symbol: `MURB1040CT`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: TO-263-2 (KiCad packages3D, STEP)
- 3D model files: `murb1040ct-etched.step` / `murb1040ct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `murb1040ct.step` / `murb1040ct.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Suzhou Good Ark Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586206616287264768) (4 pp, sha256 `178a70524d3308ff`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/murb1040ct-datasheet.pdf)