component
BZV49-C18
Public Made by Adomby adom
Nexperia Zener Diodes, SOT-89-3. 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
markdownBZV49-C18
Nexperia · Zener Diodes · SOT-89-3
BZV49-C18 from Nexperia, in a SOT-89-3. 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 | anode | passive | Anode of the BZV49-C18 voltage regulator diode; total device power dissipation is limited to max. 1 W at Tamb = 25 °C (device mounted on a ceramic substrate of 2.5 cm²). |
| 2 | cathode | passive | Cathode of the voltage regulator diode, which is also the collector pad for heat transfer on the SOT89 package; storage temperature is −65 to +150 °C and junction temperature is max. 150 °C. |
| 3 | anode | passive | Anode of the BZV49-C18 voltage regulator diode; non-repetitive peak reverse power dissipation is max. 40 W for tp = 100 µs at Tj = 25 °C prior to surge. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-89-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Working voltage (nominal typ; VZ min/max at IZtest) | VZ | 16.8 | 18 | 19.1 | V | IZtest = 5 mA | 5 |
| Working voltage tolerance (E24 series) | -5 | 5 | % | Series tolerance, stated as approx. | 3 | ||
| Differential resistance | rdif | 10 | 45 | Ω | at IZtest = 5 mA | 5 | |
| Temperature coefficient | SZ | 12.4 | 14.4 | 16 | mV/K | at IZtest = 5 mA; see Figs 4 and 5 | 5 |
| Diode capacitance | Cd | 70 | pF | f = 1 MHz; VR = 0 V | 5 | ||
| Reverse current | IR | 0.05 | μA | VR = 12.6 V | 5 | ||
| Non-repetitive peak reverse current | IZSM | 1.5 | A | tp = 100 μs; square wave; Tj = 25 °C prior to surge; Tamb = 25 °C | 5 | ||
| Continuous forward current | IF | 250 | mA | 4 | |||
| Total power dissipation | Ptot | 1 | W | Tamb = 25 °C; note 1 | 4 | ||
| Non-repetitive peak reverse power dissipation | PZSM | 40 | W | tp = 100 μs; square wave; Tj = 25 °C prior to surge; see Fig.2 | 4 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| Junction temperature | Tj | 150 | °C | 4 | |||
| Forward voltage | VF | 1 | V | IF = 50 mA; see Fig.3 | 4 | ||
| Thermal resistance, junction to tie-point | Rth(j-tp) | 15 | K/W | 7 | |||
| Thermal resistance, junction to ambient | Rth(j-a) | 125 | K/W | note 1: ceramic substrate; area = 2.5 cm2; thickness = 0.7 mm | 7 |
CAD (KiCad official)
- Symbol:
BZV49-C18 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
bzv49-c18-etched.step/bzv49-c18-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzv49-c18.step/bzv49-c18.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (11 pp, sha256
d11cb65034cc8cae, 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).