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DB3
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STMicroelectronics Diacs Trigger Diode, DO-35. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownDB3
STMicroelectronics · Diacs Trigger Diode · DO-35
DB3 from STMicroelectronics, in a DO-35. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DO-35 |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakover voltage | VBO | 28 | 32 | 36 | V | C = 22nF, connected in parallel with the device; see diagram 1 | 2 |
| Breakover current | IBO | 100 | µA | C = 22nF | 2 | ||
| Leakage current | IB | 10 | µA | VB = 0.5 VBO max; see diagram 1 | 2 | ||
| Breakover voltage symmetry | [I+VBOI-I-VBOI] | -3 | 3 | V | C = 22nF; printed as ± 3V | 2 | |
| Dynamic breakover voltage | I∆V | 5 | V | ∆I = [IBO to IF=10mA]; see diagram 1 | 2 | ||
| Output voltage | VO | 5 | V | see diagram 2 | 2 | ||
| Rise time | tr | 1.5 | µs | see diagram 3 | 2 | ||
| Repetitive peak on-state current | ITRM | 2 | A | tp = 20 µs, F = 100 Hz | 1 | ||
| Power dissipation on printed circuit | P | 150 | mW | L = 10 mm, Ta = 65 °C | 1 | ||
| Storage temperature range | Tstg | -40 | 125 | °C | 1 | ||
| Junction temperature range | Tj | -40 | 125 | °C | 1 | ||
| Junction to ambient thermal resistance | Rth (j-a) | 400 | °C/W | 1 | |||
| Junction to leads thermal resistance | Rth (j-l) | 150 | °C/W | 1 |
CAD (KiCad official)
- Symbol:
DB3 - Footprint:
Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal - 3D model: DO-35 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (4 pp, sha256
e65579e58dddd878, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).