component
S3B
Public Made by Adomby adom
TWGMC Diodes - General Purpose, SMB. 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
markdownS3B
TWGMC · Diodes - General Purpose · SMB
S3B 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; the S3B rectifier blocks up to 100 V maximum DC reverse voltage (VRRM 100 V) and conducts 3 A average forward current. |
| 2 | A | passive | Anode; forward current up to 3 A average with maximum forward voltage of 1.1 V 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 | 100 | V | 1 | |||
| Maximum RMS Voltage | VRMS | 70 | V | 1 | |||
| Maximum DC Blocking Voltage | VDC | 100 | V | 1 | |||
| Maximum Average Forward Rectified Current | IF(AV) | 3 | A | 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 | ||
| Operating and Storage Temperature Range | Tj, Tstg | -55 | 150 | °C | 1 | ||
| Typical Thermal Resistance, junction to ambient | 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, junction to case | RθJC | 16 | °C/W | P.C.B. mounted with 2.0" x 2.0" (5 x 5 cm) copper pad areas | 1 | ||
| Typical Junction Capacitance | Cj | 35 | pF | Measured at 1 MHz and applied reverse voltage of 4 V D.C | 1 |
CAD (KiCad official)
- Symbol:
S3B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
s3b-etched.step/s3b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);s3b.step/s3b.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).