component
MMBD4148SE
Public Made by Adomby adom
ST Semtech Switching Diodes, SOT-23. Pinout reviewed by a person 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
markdownMMBD4148SE
ST Semtech · Switching Diodes · SOT-23
MMBD4148SE from ST Semtech, in a SOT-23. 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 | A | passive | Anode of diode D1 (series chain input); rated V(BR)R1=100V min, VF=1V max at IF=10mA, IFM=300mA max. |
| 2 | K | passive | Cathode of diode D2 (series chain output); rated V(BR)R1=100V min, VRRM=100V, IO=200mA average rectified. |
| 3 | S | passive | Series node - cathode of D1 / anode of D2; internal mid-point of the two series-connected diodes, not bonded to package exterior in all configurations. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| Package | SOT-23 |
| Category | Diodes |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse Breakdown Voltage | V(BR)R1 | 100 | V | IR=100μA | 1 | ||
| Reverse Breakdown Voltage | V(BR)R2 | 75 | V | IR=5μA | 1 | ||
| Forward voltage | VF | 1 | V | IF=10mA | 1 | ||
| Reverse current | IR1 | 5 | μA | VR=75V | 1 | ||
| Reverse current | IR2 | 25 | nA | VR=25V | 1 | ||
| Capacitance between terminals | CT | 4 | pF | VR=0V,f=1MHz | 1 | ||
| Reverse Recovery Time | trr | 4 | ns | IF=IR=10mA, VR=6V, Irr=0.1XIR, RL=100 | 1 | ||
| Non-Repetitive Peak reverse voltage | VRM | 100 | V | 1 | |||
| Peak Repetitive Peak reverse voltage / Working Peak Reverse Voltage / DC Blocking Voltage | VRRM/VRWM/VR | 100 | V | 1 | |||
| RMS Reverse Voltage | VR(RMS) | 53 | V | 1 | |||
| Forward Continuous Current | IFM | 300 | mA | 1 | |||
| Average Rectified Output Current | IO | 200 | mA | 1 | |||
| Peak forward surge current | I | 2 | A | @=1.0μs | 1 | ||
| Peak forward surge current | I | 1 | A | @=1.0s | 1 | ||
| Power Dissipation | PD | 350 | mW | 1 | |||
| Junction temperature | Tj | 150 | 1 | ||||
| Storage temperature | TSTG | -65 | 150 | 1 | |||
| Thermal Resistance Junction to Ambient | RθJA | 357 | /W | 1 |
CAD (KiCad official)
- Symbol:
MMBD4148SE - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbd4148se-etched.step/mmbd4148se-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbd4148se.step/mmbd4148se.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (2 pp, sha256
529c496b4764c6f6, retrieved 2026-10-21, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).