component
S3G
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TWGMC Diodes - General Purpose, SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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S3G
TWGMC · Diodes - General Purpose · SMB
S3G from TWGMC, 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 | Cathode | passive | Cathode terminal of the unipolar rectifier diode; device blocks up to 50 to 1000 V reverse voltage depending on S3A to S3M grade. |
| 2 | A | passive | Anode terminal of the rectifier diode; passes up to 3 A average forward rectified current with 1.1 V maximum forward voltage at 3 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| Package | SMB |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM | 400 | V | 1 | |||
| Maximum RMS Voltage | VRMS | 280 | V | 1 | |||
| Maximum DC Blocking Voltage | VDC | 400 | V | 1 | |||
| Maximum Average Forward Rectified Current | IF(AV) | 3 | A | Single phase half-wave 60 Hz, resistive or inductive load | 1 | ||
| Peak Forward Surge Current | IFSM | 90 | A | 8.3 ms single half sine wave superimposed on rated load | 1 | ||
| Maximum Instantaneous Forward Voltage | VF | 1.1 | V | at 3 A | 1 | ||
| Maximum DC Reverse Current | IR | 5 | μA | Ta=25 °C, at rated DC blocking voltage | 1 | ||
| Maximum DC Reverse Current | IR | 100 | μA | Ta=125 °C, at rated DC blocking voltage | 1 | ||
| Typical Junction Capacitance | Cj | 35 | pF | Measured at 1 MHz and applied reverse voltage of 4 V D.C | 1 | ||
| Typical Thermal Resistance | RθJA | 48 | °C/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper pad areas | 1 | ||
| Typical Thermal Resistance | RθJC | 16 | °C/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper pad areas | 1 | ||
| Operating and Storage Temperature Range | Tj, Tstg | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
S3G - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
s3g-etched.step/s3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);s3g.step/s3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TWGMC datasheet (3 pp, sha256
35cda62c85c96b30, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-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).
# S3G
**TWGMC** · Diodes - General Purpose · SMB
S3G from TWGMC, 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 | Cathode | passive | Cathode terminal of the unipolar rectifier diode; device blocks up to 50 to 1000 V reverse voltage depending on S3A to S3M grade. |
| 2 | A | passive | Anode terminal of the rectifier diode; passes up to 3 A average forward rectified current with 1.1 V maximum forward voltage at 3 A. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| Package | SMB |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM | | | 400 | V | | 1 |
| Maximum RMS Voltage | VRMS | | | 280 | V | | 1 |
| Maximum DC Blocking Voltage | VDC | | | 400 | V | | 1 |
| Maximum Average Forward Rectified Current | IF(AV) | | | 3 | A | Single phase half-wave 60 Hz, resistive or inductive load | 1 |
| Peak Forward Surge Current | IFSM | | | 90 | A | 8.3 ms single half sine wave superimposed on rated load | 1 |
| Maximum Instantaneous Forward Voltage | VF | | | 1.1 | V | at 3 A | 1 |
| Maximum DC Reverse Current | IR | | | 5 | μA | Ta=25 °C, at rated DC blocking voltage | 1 |
| Maximum DC Reverse Current | IR | | | 100 | μA | Ta=125 °C, at rated DC blocking voltage | 1 |
| Typical Junction Capacitance | Cj | | 35 | | pF | Measured at 1 MHz and applied reverse voltage of 4 V D.C | 1 |
| Typical Thermal Resistance | RθJA | | 48 | | °C/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper pad areas | 1 |
| Typical Thermal Resistance | RθJC | | 16 | | °C/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper pad areas | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -55 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `S3G`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `s3g-etched.step` / `s3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s3g.step` / `s3g.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [TWGMC datasheet](docs/s3g-datasheet.pdf) (3 pp, sha256 `35cda62c85c96b30`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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/s3g-datasheet.pdf)