component
RB521SM-40T2R
Public Made by Adomby adom
ROHM Semicon Schottky Barrier Diodes (SBD), SOD-523. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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
markdownRB521SM-40T2R
ROHM Semicon · Schottky Barrier Diodes (SBD) · SOD-523
RB521SM-40T2R from ROHM Semicon, in a SOD-523. 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 | ROHM Semicon |
| Package | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Forward voltage | VF1 | 0.16 | 0.26 | 0.3 | V | IF=10mA | 1 |
| Forward voltage | VF2 | 0.31 | 0.39 | 0.45 | V | IF=100mA | 1 |
| Forward voltage | VF3 | 0.41 | 0.49 | 0.54 | V | IF=200mA | 1 |
| Reverse current | IR1 | 3.5 | 20 | μA | VR=10V | 1 | |
| Reverse current | IR2 | 13 | 90 | μA | VR=40V | 1 | |
| Repetitive peak reverse voltage | VRM | 45 | V | Duty≦0.5 | 1 | ||
| Reverse voltage | VR | 40 | V | Reverse direct voltage | 1 | ||
| Average rectified forward current | Io | 200 | mA | Glass epoxy mounted, 60Hz half sin waveform, resistive load | 1 | ||
| Peak forward surge current | IFSM | 1 | A | 60Hz half sinwaveform, Non-repetitive, one cycle, Ta=25℃ | 1 | ||
| Junction temperature | Tj | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
RB521SM-40T2R - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files:
rb521sm-40t2r-etched.step/rb521sm-40t2r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rb521sm-40t2r.step/rb521sm-40t2r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ROHM Semicon datasheet (8 pp, sha256
4e6efdc8cacdf878, retrieved 2026-10-21, tier: manufacturer) - 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).