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BAT54S-MS
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MSKSEMI Schottky Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BAT54S-MS
MSKSEMI · Schottky Diodes · SOT-23
BAT54S-MS from MSKSEMI, 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 | A1 | passive | Anode of the first Schottky diode, which is in series with the second diode (BAT54S-MS, marking KL4); the datasheet gives 30 V peak repetitive reverse voltage and 200 mA forward continuous current. |
| 2 | K2 | passive | Cathode of the second Schottky diode in the series pair (BAT54S-MS, marking KL4); the datasheet gives 30 V reverse voltage and 200 mA forward continuous current. |
| 3 | K1/A2 | passive | Common midpoint node joining the cathode of the first diode to the anode of the second diode in the BAT54S-MS series configuration. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Breakdown Voltage | V(BR)R | 30 | V | IR=100μA | 3 | ||
| Forward voltage | VF1 | 0.24 | V | IF=0.1mA | 3 | ||
| Forward voltage | VF2 | 0.32 | V | IF=1mA | 3 | ||
| Forward voltage | VF3 | 0.4 | V | IF=10mA | 3 | ||
| Forward voltage | VF4 | 0.5 | V | IF=30mA | 3 | ||
| Forward voltage | VF5 | 1 | V | IF=100mA | 3 | ||
| Reverse current | IR | 2 | μA | VR=25V | 3 | ||
| Diode Capacitance | D | 10 | F | VR=1V,f=1MHz | 3 | ||
| Reverse Recovery Time | trr | 5 | nS | IF=IR=10mA, Irr=0.1XIR, RL=100Ω | 3 | ||
| Peak Repetitive Reverse Voltage / Working Peak Reverse Voltage / DC Reverse Voltage | VRRM, VRWM, VR | 30 | V | 3 | |||
| Forward Continuous Current | IFM | 200 | mA | 3 | |||
| Power Dissipation | PD | 200 | mW | 3 | |||
| Storage temperature | TSTG | -55 | 150 | ℃ | 3 |
CAD (KiCad official)
- Symbol:
BAT54S-MS - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bat54s-ms-etched.step/bat54s-ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bat54s-ms.step/bat54s-ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (6 pp, sha256
f30c979f9c0b1fac, 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).
# BAT54S-MS
**MSKSEMI** · Schottky Diodes · SOT-23
BAT54S-MS from MSKSEMI, 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 | A1 | passive | Anode of the first Schottky diode, which is in series with the second diode (BAT54S-MS, marking KL4); the datasheet gives 30 V peak repetitive reverse voltage and 200 mA forward continuous current. |
| 2 | K2 | passive | Cathode of the second Schottky diode in the series pair (BAT54S-MS, marking KL4); the datasheet gives 30 V reverse voltage and 200 mA forward continuous current. |
| 3 | K1/A2 | passive | Common midpoint node joining the cathode of the first diode to the anode of the second diode in the BAT54S-MS series configuration. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Breakdown Voltage | V(BR)R | 30 | | | V | IR=100μA | 3 |
| Forward voltage | VF1 | | | 0.24 | V | IF=0.1mA | 3 |
| Forward voltage | VF2 | | | 0.32 | V | IF=1mA | 3 |
| Forward voltage | VF3 | | | 0.4 | V | IF=10mA | 3 |
| Forward voltage | VF4 | | | 0.5 | V | IF=30mA | 3 |
| Forward voltage | VF5 | | | 1 | V | IF=100mA | 3 |
| Reverse current | IR | | | 2 | μA | VR=25V | 3 |
| Diode Capacitance | D | | | 10 | F | VR=1V,f=1MHz | 3 |
| Reverse Recovery Time | trr | | | 5 | nS | IF=IR=10mA, Irr=0.1XIR, RL=100Ω | 3 |
| Peak Repetitive Reverse Voltage / Working Peak Reverse Voltage / DC Reverse Voltage | VRRM, VRWM, VR | | | 30 | V | | 3 |
| Forward Continuous Current | IFM | | | 200 | mA | | 3 |
| Power Dissipation | PD | | | 200 | mW | | 3 |
| Storage temperature | TSTG | -55 | | 150 | ℃ | | 3 |
## CAD (KiCad official)
- Symbol: `BAT54S-MS`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bat54s-ms-etched.step` / `bat54s-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat54s-ms.step` / `bat54s-ms.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590184411971805184) (6 pp, sha256 `f30c979f9c0b1fac`, retrieved 2026-10-17, 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/bat54s-ms-datasheet.pdf)