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PCR406
Public Made by Adomby adom
WEIDA Thyristors (SCR)/Modules, SOT-23. Pinout cross-checked by two models against the datasheet, 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
markdownPCR406
WEIDA · Thyristors (SCR)/Modules · SOT-23
PCR406 from WEIDA, in a SOT-23. 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 of the SCR (K(1)); the 0.5A, 600V sensitive SCR's on-state current (IT(RMS) 0.5A) returns through this pin. |
| 2 | A | passive | Anode of the SCR (A(2)); sustains repetitive peak off-state voltage VDRM/VRRM of 600V. |
| 3 | G | input | Gate trigger input (G(3)); IGT is 20µA typ and 200µA max at VD=12V, with peak gate current IGM of 0.2A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WEIDA |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| 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 |
|---|---|---|---|---|---|---|---|
| Gate trigger current | IGT | 20 | 200 | µA | VD=12V, RL=33Ω | 2 | |
| Gate trigger voltage | VGT | 0.6 | 0.8 | V | 2 | ||
| Gate non-trigger voltage | VGD | 0.2 | V | VD=VDRM Tj=110℃ RL=3.3kΩ | 2 | ||
| Holding current | IH | 5 | mA | IT=50mA | 2 | ||
| Latching current | IL | 6 | mA | IG=1.2IGT | 2 | ||
| Critical rate of rise of off-state voltage | dV/dt | 10 | V/µs | VD=0.66×VDRM Tj=110℃ Gate open RGK=1KΩ | 2 | ||
| On-state voltage | VTM | 1.7 | V | ITM=0.6A tp=380μs Tj=25℃ | 2 | ||
| Off-state leakage current | IDRM | 5 | µA | RGK=1KΩ Tj=25℃ | 2 | ||
| Off-state leakage current | IDRM | 100 | µA | Tj=110℃ | 2 | ||
| Storage junction temperature range | Tstg | -40 | 150 | ℃ | 1 | ||
| Operating junction temperature range | Tj | -40 | 110 | ℃ | 1 | ||
| Repetitive peak off-state voltage | VDRM | 600 | V | Tj=25℃ | 1 | ||
| RMS on-state current | IT(RMS) | 0.5 | A | 1 | |||
| Non repetitive surge peak on-state current | ITSM | 6 | A | full cycle, F=50Hz | 1 | ||
| I2t value for fusing | I2t | 0.32 | A2s | tp=10ms | 1 | ||
| Critical rate of rise of on-state current | dI/dt | 50 | A/µs | IG=2×IGT | 1 | ||
| Peak gate current | IGM | 0.2 | A | 1 | |||
| Average gate power dissipation | PG(AV) | 0.1 | W | 1 | |||
| Peak gate power | PGM | 0.5 | W | 1 | |||
| Thermal resistance junction to case (AC) | Rth(j-c) | 80 | ℃/W | junction to case(AC) SOT-23 | 2 |
CAD (KiCad official)
- Symbol:
PCR406 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
pcr406-etched.step/pcr406-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pcr406.step/pcr406.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WEIDA datasheet (4 pp, sha256
8439a2ca621d9b6b, retrieved 2026-10-18, 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).