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SZP6SMB20CAT3G
Public Made by Adomby adom
Littelfuse TVS, SMB. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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SZP6SMB20CAT3G
Littelfuse · TVS · SMB
SZP6SMB20CAT3G from Littelfuse, in a SMB. 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 | Littelfuse |
| Package | SMB |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage (bidirectional, 20C) | VBR | 19 | 20 | 21 | V | @ IT = 1 mA; TA = 25°C (Note 7) | 4 |
| Maximum Reverse Leakage Current | IR | 5 | µA | @ VRWM | 4 | ||
| Peak Power Dissipation | PPK | 600 | W | TL = 25°C, Pulse Width = 1 ms, 10/1000 µs non-repetitive (Note 1) | 1 | ||
| DC Power Dissipation @ TL = 75°C | PD | 3 | W | Measured Zero Lead Length (Note 2) | 1 | ||
| DC Power Dissipation @ TA = 25°C | PD | 0.55 | W | FR-4 board, Littelfuse minimum recommended footprint (Note 3) | 1 | ||
| Operating and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Clamping Voltage @ IPP | VC | 27.7 | V | @ IPP = 22 A (Note 8) | 4 | ||
| Temperature coefficient of breakdown voltage | 0.09 | %/°C | 4 | ||||
| Typical Junction Capacitance | C | 490 | pF | Bias Voltage = 0 V, F = 1 MHz, TJ = 25°C (Note 9) | 4 | ||
| Working Peak Reverse Voltage | VRWM | 17.1 | V | 4 | |||
| Thermal Resistance from Junction-to-Lead | RθJL | 25 | °C/W | Measured Zero Lead Length (Note 2) | 1 | ||
| Derate Above 75°C (DC power, TL) | 40 | mW/°C | Above TL = 75°C | 1 | |||
| Derate Above 25°C (DC power, TA) | 4.4 | mW/°C | Above TA = 25°C | 1 | |||
| Thermal Resistance from Junction-to-Ambient | RθJA | 226 | °C/W | FR-4 board, Littelfuse minimum recommended footprint (Note 3) | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | and the terminal finish material is tin(Sn) (IPC/ | 1 |
CAD (KiCad official)
- Symbol:
SZP6SMB20CAT3G - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
szp6smb20cat3g-etched.step/szp6smb20cat3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);szp6smb20cat3g.step/szp6smb20cat3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (7 pp, sha256
baf561fbcd6cd66c, retrieved 2026-10-28, 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).
# SZP6SMB20CAT3G
**Littelfuse** · TVS · SMB
SZP6SMB20CAT3G from Littelfuse, in a SMB. 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 | Littelfuse |
| Package | SMB |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage (bidirectional, 20C) | VBR | 19 | 20 | 21 | V | @ IT = 1 mA; TA = 25°C (Note 7) | 4 |
| Maximum Reverse Leakage Current | IR | | | 5 | µA | @ VRWM | 4 |
| Peak Power Dissipation | PPK | | | 600 | W | TL = 25°C, Pulse Width = 1 ms, 10/1000 µs non-repetitive (Note 1) | 1 |
| DC Power Dissipation @ TL = 75°C | PD | | | 3 | W | Measured Zero Lead Length (Note 2) | 1 |
| DC Power Dissipation @ TA = 25°C | PD | | | 0.55 | W | FR-4 board, Littelfuse minimum recommended footprint (Note 3) | 1 |
| Operating and Storage Temperature Range | TJ, Tstg | -65 | | 150 | °C | | 1 |
| Clamping Voltage @ IPP | VC | | 27.7 | | V | @ IPP = 22 A (Note 8) | 4 |
| Temperature coefficient of breakdown voltage | | | 0.09 | | %/°C | | 4 |
| Typical Junction Capacitance | C | | 490 | | pF | Bias Voltage = 0 V, F = 1 MHz, TJ = 25°C (Note 9) | 4 |
| Working Peak Reverse Voltage | VRWM | | 17.1 | | V | | 4 |
| Thermal Resistance from Junction-to-Lead | RθJL | | 25 | | °C/W | Measured Zero Lead Length (Note 2) | 1 |
| Derate Above 75°C (DC power, TL) | | | 40 | | mW/°C | Above TL = 75°C | 1 |
| Derate Above 25°C (DC power, TA) | | | 4.4 | | mW/°C | Above TA = 25°C | 1 |
| Thermal Resistance from Junction-to-Ambient | RθJA | | 226 | | °C/W | FR-4 board, Littelfuse minimum recommended footprint (Note 3) | 1 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | and the terminal finish material is tin(Sn) (IPC/ | 1 |
## CAD (KiCad official)
- Symbol: `SZP6SMB20CAT3G`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `szp6smb20cat3g-etched.step` / `szp6smb20cat3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `szp6smb20cat3g.step` / `szp6smb20cat3g.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Littelfuse datasheet](docs/szp6smb20cat3g-datasheet.pdf) (7 pp, sha256 `baf561fbcd6cd66c`, retrieved 2026-10-28, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/szp6smb20cat3g-datasheet.pdf)