component
BAS21A_R1_00001
Public Made by Adomby adom
PANJIT International Switching Diodes, 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
markdownBAS21A_R1_00001
PANJIT International · Switching Diodes · SOT-23
BAS21A_R1_00001 from PANJIT International, 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 | K1 | passive | Cathode of the first diode in the BAS21A common-anode dual (250 V max reverse voltage, 0.2 A average rectified current). |
| 2 | K2 | passive | Cathode of the second diode in the BAS21A common-anode dual (250 V max reverse voltage, 0.2 A average rectified current). |
| 3 | A | passive | Common anode of both diodes, shown as the single terminal on the opposite side of the package from the two cathodes. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | PANJIT International |
| Package | SOT-23 |
| 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 reverse voltage | VR | 250 | V | 1 | |||
| Peak reverse voltage | VRRM | 250 | V | 1 | |||
| Average rectified current | IO | 0.2 | A | at temp=25 oC | 1 | ||
| Non-repetitive peak forward surge current | IFSM | 4 | A | t=1s | 1 | ||
| Power dissipation | PTOT | 250 | mW | 1 | |||
| Typical thermal resistance, junction to ambient | RθJA | 357 | oC/W | Note 1: Mounted on a FR-4 PCB, single-sided copper, mini pad | 1 | ||
| Typical thermal resistance, junction to case | RθJC | 250 | oC/W | Note 2: Mounted on a FR-4 PCB, single-sided copper, with 100cm2 copper pad area | 1 | ||
| Typical thermal resistance, junction to lead | RθJL | 285 | oC/W | Note 2: Mounted on a FR-4 PCB, single-sided copper, with 100cm2 copper pad area | 1 | ||
| Junction temperature range | TJ | 150 | oC | 1 | |||
| Storage temperature range | TSTG | -55 | 150 | oC | 1 | ||
| Reverse breakdown voltage | V(BR) | 250 | V | IR=100A | 2 | ||
| Reverse current | IR | 0.1 | A | VR =200V | 2 | ||
| Reverse current | IR | 100 | A | VR =200V TJ=150oC | 2 | ||
| Forward voltage | VF | 0.7 | V | IF=1mA | 2 | ||
| Forward voltage | VF | 1 | V | IF=100mA | 2 | ||
| Maximum junction capacitance | CJ | 5 | pF | VR=0V,f=1MHz | 2 | ||
| Reverse recovery time | TRR | 50 | ns | IF = IR=30mA RL=100 | 2 |
CAD (KiCad official)
- Symbol:
BAS21A_R1_00001 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bas21a-r1-00001-etched.step/bas21a-r1-00001-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bas21a-r1-00001.step/bas21a-r1-00001.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: PANJIT International datasheet (5 pp, sha256
f02cd511da461f80, retrieved 2026-10-17, 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).