component
MSR05
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MSKSEMI ESD Protection Devices, SOT-143. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MSR05
MSKSEMI · ESD Protection Devices · SOT-143
MSR05 from MSKSEMI, in a SOT-143. 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 | GND | power_in | Ground/return side of the internal TVS diode and steering diodes (zener connects pin 4 to pin 1 in the page 2 drawing), with ESD rated at ±30kV air and contact per IEC 61000-4-2. |
| 2 | I/O | bidirectional | Protected line connected to a steering-diode pair, suited to USB 2.0 data lines, with a 5V working voltage (VRWM) and 1.2pF typical capacitance. |
| 3 | I/O | bidirectional | Protected line connected to a steering-diode pair, suited to USB 2.0 data lines, with a 5V working voltage (VRWM) and 1.2pF typical capacitance. |
| 4 | VCC | power_in | Positive rail of the diode array connected to the TVS diode cathode, with a 5V working voltage (VRWM) and 6V breakdown voltage at 1mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOT-143 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 4 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (min) | VBR | 6 | V | IT = 1 mA (IT column) | 3 | ||
| Clamping voltage (max) | VC | 23 | V | VC @1A column header; test current column printed as 3 (@A) | 3 | ||
| Reverse leakage current (max) | IR | 1 | µA | 3 | |||
| Peak pulse power (8/20µs) | Ppp | 300 | W | 8/20µs | 2 | ||
| ESD per IEC 61000-4-2 (Air) | VESD | -30 | 30 | kV | IEC 61000-4-2 air discharge | 2 | |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 | 30 | kV | IEC 61000-4-2 contact discharge | 2 | |
| Operating temperature range | TJ | -55 | 125 | ℃ | 2 | ||
| Storage temperature range | TSTJ | -55 | 150 | ℃ | 2 | ||
| Operating voltage | VRWM | 5 | V | Listed as operating voltage in Features; VRWM column | 2 |
CAD (KiCad official)
- Symbol:
MSR05 - Footprint:
Package_TO_SOT_SMD:SOT-143 - 3D model: SOT-143 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (5 pp, sha256
451dbdc0bd05afe8, retrieved 2026-11-05, 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).
# MSR05
**MSKSEMI** · ESD Protection Devices · SOT-143
MSR05 from MSKSEMI, in a SOT-143. 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 | GND | power_in | Ground/return side of the internal TVS diode and steering diodes (zener connects pin 4 to pin 1 in the page 2 drawing), with ESD rated at ±30kV air and contact per IEC 61000-4-2. |
| 2 | I/O | bidirectional | Protected line connected to a steering-diode pair, suited to USB 2.0 data lines, with a 5V working voltage (VRWM) and 1.2pF typical capacitance. |
| 3 | I/O | bidirectional | Protected line connected to a steering-diode pair, suited to USB 2.0 data lines, with a 5V working voltage (VRWM) and 1.2pF typical capacitance. |
| 4 | VCC | power_in | Positive rail of the diode array connected to the TVS diode cathode, with a 5V working voltage (VRWM) and 6V breakdown voltage at 1mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOT-143 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 4 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (min) | VBR | 6 | | | V | IT = 1 mA (IT column) | 3 |
| Clamping voltage (max) | VC | | | 23 | V | VC @1A column header; test current column printed as 3 (@A) | 3 |
| Reverse leakage current (max) | IR | | | 1 | µA | | 3 |
| Peak pulse power (8/20µs) | Ppp | | | 300 | W | 8/20µs | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD | -30 | | 30 | kV | IEC 61000-4-2 air discharge | 2 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 | | 30 | kV | IEC 61000-4-2 contact discharge | 2 |
| Operating temperature range | TJ | -55 | | 125 | ℃ | | 2 |
| Storage temperature range | TSTJ | -55 | | 150 | ℃ | | 2 |
| Operating voltage | VRWM | | 5 | | V | Listed as operating voltage in Features; VRWM column | 2 |
## CAD (KiCad official)
- Symbol: `MSR05`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [MSKSEMI datasheet](docs/msr05-datasheet.pdf) (5 pp, sha256 `451dbdc0bd05afe8`, retrieved 2026-11-05, 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/msr05-datasheet.pdf)