component
ULC0502M3Q
Public Made by Adomby adom
Leiditech ESD Protection Devices, SOT-723. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
ULC0502M3Q
Leiditech · ESD Protection Devices · SOT-723
ULC0502M3Q from Leiditech, in a SOT-723. 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 | I/O1 | passive | Protected line 1 (steering-diode input) for a 5V working-voltage line, 100 W peak pulse power (8/20µs), 0.3 pF typical capacitance. |
| 2 | I/O2 | passive | Protected line 2 (steering-diode input) for a 5V working-voltage line, 100 W peak pulse power (8/20µs), 0.3 pF typical capacitance. |
| 3 | GND | power_in | Common ground/reference pin connected to the TVS diode, with VRWM of 5V for the protected lines. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | SOT-723 |
| Category | TVS/Fuse/Board Level Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off (working) voltage | VRWM | 5 | V | 2 | |||
| Reverse breakdown voltage | VBR | 6 | V | IT = 1 mA | 2 | ||
| Reverse leakage current | IR | 1 | μA | 2 | |||
| Clamping voltage | Vc | 25 | V | @ 4 A | 2 | ||
| Clamping voltage @1A | VC | 12 | V | @1A | 2 | ||
| Capacitance | C | 0.3 | pF | 2 | |||
| Peak pulse power | Ppp | 100 | W | tp=8/20μs | 1 | ||
| ESD per IEC 61000-4-2 (Air) | VESD | -15 | 15 | kV | Tamb=25°C | 1 | |
| ESD per IEC 61000-4-2 (Contact) | VESD | -8 | 8 | kV | Tamb=25°C | 1 | |
| Operating temperature range | TJ | -55 | 125 | °C | 1 | ||
| Storage temperature range | TSTJ | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
ULC0502M3Q - Footprint:
Package_TO_SOT_SMD:SOT-723 - 3D model: SOT-723, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.5 mm nominal SOT-723 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Leiditech datasheet (6 pp, sha256
1d194c2435ca75d3, retrieved 2026-10-30, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).
# ULC0502M3Q
**Leiditech** · ESD Protection Devices · SOT-723
ULC0502M3Q from Leiditech, in a SOT-723. 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 | I/O1 | passive | Protected line 1 (steering-diode input) for a 5V working-voltage line, 100 W peak pulse power (8/20µs), 0.3 pF typical capacitance. |
| 2 | I/O2 | passive | Protected line 2 (steering-diode input) for a 5V working-voltage line, 100 W peak pulse power (8/20µs), 0.3 pF typical capacitance. |
| 3 | GND | power_in | Common ground/reference pin connected to the TVS diode, with VRWM of 5V for the protected lines. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | SOT-723 |
| Category | TVS/Fuse/Board Level Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off (working) voltage | VRWM | | | 5 | V | | 2 |
| Reverse breakdown voltage | VBR | 6 | | | V | IT = 1 mA | 2 |
| Reverse leakage current | IR | | | 1 | μA | | 2 |
| Clamping voltage | Vc | | | 25 | V | @ 4 A | 2 |
| Clamping voltage @1A | VC | | 12 | | V | @1A | 2 |
| Capacitance | C | | 0.3 | | pF | | 2 |
| Peak pulse power | Ppp | | | 100 | W | tp=8/20μs | 1 |
| ESD per IEC 61000-4-2 (Air) | VESD | -15 | | 15 | kV | Tamb=25°C | 1 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -8 | | 8 | kV | Tamb=25°C | 1 |
| Operating temperature range | TJ | -55 | | 125 | °C | | 1 |
| Storage temperature range | TSTJ | -55 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `ULC0502M3Q`
- Footprint: `Package_TO_SOT_SMD:SOT-723`
- 3D model: SOT-723, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.5 mm nominal SOT-723 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Leiditech datasheet](docs/ulc0502m3q-datasheet.pdf) (6 pp, sha256 `1d194c2435ca75d3`, retrieved 2026-10-30, 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/ulc0502m3q-datasheet.pdf)