component
MMSZ5261BT1G
Public Made by Adomby adom
onsemi Zener Diodes, SOD-123. 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
markdownMMSZ5261BT1G
onsemi · Zener Diodes · SOD-123
MMSZ5261BT1G from onsemi, 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 | The cathode is marked by the polarity band on the package and is the Zener regulation terminal, with the device junction rated at a maximum of 150 °C (TJ, Tstg range −55 to +150 °C). |
| 2 | Anode | passive | The anode is the opposite terminal to the cathode, and the device is used as a Zener voltage regulator in reverse bias. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOD-123 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage @ IZT | VZ | 44.65 | 47 | 49.35 | V | @ IZT = 2.7 mA, TA = 25°C; 5% tolerance (B suffix) | 3 |
| Maximum Zener Impedance @ IZT | ZZT | 105 | Ω | @ IZT = 2.7 mA, IZ(AC) = 0.1 IZ(DC), f = 1 kHz | 3 | ||
| Maximum Zener Impedance @ IZK | ZZK | 1000 | Ω | @ IZK = 0.25 mA | 3 | ||
| Reverse Leakage Current @ VR | IR | 0.1 | µA | @ VR = 36 V | 3 | ||
| Forward Voltage @ IF | VF | 0.9 | V | @ IF = 10 mA (5% tolerance FG table header) | 3 | ||
| Total Power Dissipation on FR-5 Board | PD | 500 | mW | @ TL = 75°C, FR-5 board (Note 1) | 1 | ||
| Derating above 75°C | PD | 6.7 | mW/°C | Derated above TL = 75°C | 1 | ||
| Thermal Resistance, Junction-to-Ambient | RJA | 340 | °C/W | Note 2 (infrared scan method) | 1 | ||
| Thermal Resistance, Junction-to-Lead | RJL | 150 | °C/W | Note 2 (infrared scan method) | 1 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
MMSZ5261BT1G - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mmsz5261bt1g-etched.step/mmsz5261bt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmsz5261bt1g.step/mmsz5261bt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (8 pp, sha256
2711e46b01090f07, 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).