# SDUR1640CT

**SMC Sangdest Microelectronicstronic Nanjing** · Fast Recovery / High Efficiency Diodes · TO-220AB

SDUR1640CT from SMC Sangdest Microelectronicstronic Nanjing, 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 rectifier leg, rated 8 A average forward current per leg and 400 V VRRM. |
| 2 | K | passive | Common cathode of both legs, also connected to the base/tab, rated 16 A average forward current per device. |
| 3 | A2 | passive | Anode of the second rectifier leg, rated 8 A average forward current per leg and 400 V VRRM. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SMC Sangdest Microelectronicstronic Nanjing |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Repetitive Reverse Voltage (VRRM / VRWM / VR) | VRRM |  |  | 400 | V |  | 1 |
| Average Rectified Forward Current (Per Leg) | IF (AV) |  |  | 8 | A | 50% duty cycle @Tc=105°C, rectangular wave form | 1 |
| Average Rectified Forward Current (Per Device) | IF (AV) |  |  | 16 | A | 50% duty cycle @Tc=105°C, rectangular wave form | 1 |
| Peak One Cycle Non-Repetitive Surge Current (Per Leg) | IFSM |  |  | 80 | A | 8.3ms, Half Sine pulse | 1 |
| Forward Voltage Drop (Per Leg) | VF1 |  | 1.01 | 1.3 | V | @8A, Pulse, TJ = 25C | 1 |
| Forward Voltage Drop (Per Leg) | VF2 |  | 0.92 | 1.2 | V | @8A, Pulse, TJ = 125C | 1 |
| Reverse Current (Per Leg) | IR1 |  | 0.06 | 10 | μA | @VR = rated VR TJ = 25C | 1 |
| Reverse Current (Per Leg) | IR2 |  | 7 | 500 | μA | @VR = rated VR TJ = 125C | 1 |
| Reverse Recovery Time (Per Leg) | trr |  | 34 | 45 | ns | IF=500mA, IR=1A, and Irm=250mA | 1 |
| Junction Temperature | TJ | -55 |  | 150 | C |  | 2 |
| Storage Temperature | Tstg | -55 |  | 150 | C |  | 2 |
| Typical Thermal Resistance Junction to Case | RJC |  | 5 |  | C/W | DC operation | 2 |

## CAD (KiCad official)

- Symbol: `SDUR1640CT`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220AB (KiCad packages3D, STEP)
- 3D model files: `sdur1640ct-etched.step` / `sdur1640ct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sdur1640ct.step` / `sdur1640ct.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SMC Sangdest Microelectronicstronic Nanjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588891224959307776) (4 pp, sha256 `ae6d9e23b91b4207`, retrieved 2026-10-15, 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/sdur1640ct-datasheet.pdf)