component
MMSZ5243BT1G
Public Made by Adomby adom
ON Semiconductor Global Sourcing Parts, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownMMSZ5243BT1G
ON Semiconductor · Global Sourcing Parts · SOD-123
MMSZ5243BT1G from ON Semiconductor, in a SOD-123. 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 Zener diode, marked by the polarity band on the package (SOD-123 Style 1, pin 1 = Cathode). |
| 2 | Anode | passive | Anode terminal of the Zener diode (SOD-123 Style 1, pin 2 = Anode); the datasheet gives no pin-specific electrical limits. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ON Semiconductor |
| Package | SOD-123 |
| Category | Global Sourcing Parts |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage (MMSZ5243BT1G, 5% B suffix) | VZ | 12.35 | 13 | 13.65 | V | @ IZT = 9.5 mA; TA = 25°C; nominal measured at TL = 30°C ±1°C | 3 |
| Zener voltage tolerance (B suffix) | -5 | 5 | % | B suffix, standard tolerance on nominal Zener voltage (Note 3) | 3 | ||
| Maximum Zener impedance | ZZT | 13 | Ω | @ IZT = 9.5 mA; IZ(AC) = 0.1 IZ(dc), f = 1 kHz | 3 | ||
| Maximum Zener impedance | ZZK | 600 | Ω | @ IZK = 0.25 mA; IZ(AC) = 0.1 IZ(dc), f = 1 kHz | 3 | ||
| Reverse leakage current | IR | 0.5 | µA | @ VR = 9.9 V | 3 | ||
| Forward voltage | VF | 0.9 | V | @ IF = 10 mA | 3 | ||
| Total power dissipation on FR-5 board | PD | 500 | mW | FR-5 board (Note 1) @ TL = 75°C | 1 | ||
| Thermal resistance, junction-to-ambient | RθJA | 340 | °C/W | Note 2 (infrared scan method) | 1 | ||
| Thermal resistance, junction-to-lead | RθJL | 150 | °C/W | Note 2 (infrared scan method) | 1 | ||
| Junction and storage temperature range | TJ, Tstg | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5243BT1G - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5243bt1g-etched.step/mmsz5243bt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5243bt1g.step/mmsz5243bt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ON Semiconductor datasheet (7 pp, sha256
dd020fc5576bb75b, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).