component
ZMM5258B
Public Made by Adomby adom
JSMSEMI Zener Diodes, MiniMELF. 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
markdownZMM5258B
JSMSEMI · Zener Diodes · MiniMELF
ZMM5258B from JSMSEMI, in a MiniMELF. 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 end marked with the color band; the zener voltage for ZMM5258B is 36 V nominal at IZT = 3.4 mA with a 0.5 W (Ptot) rating. |
| 2 | A | passive | Anode, the end opposite the color band; the forward voltage is 1.1 V maximum at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | MiniMELF |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage tolerance (B suffix) | VZ | -5 | 5 | % | Standard tolerance with B suffix | 1 | |
| Nominal zener voltage | VZ | 36 | V | @ IZT | 2 | ||
| Zener test current | IZT | 3.4 | mA | 2 | |||
| Maximum zener impedance | ZZT | 70 | Ω | @ IZT | 2 | ||
| Maximum zener impedance (knee) | ZZK | 700 | Ω | @ IZK | 2 | ||
| Typical temperature coefficient of zener voltage | αVZ | 0.093 | %/°C | 2 | |||
| Maximum reverse leakage current | IR | 0.1 | µA | @ VR = 27 V | 2 | ||
| Reverse voltage for leakage test | VR | 27 | V | 2 | |||
| Maximum DC zener current | IZM | 12.6 | mA | 2 | |||
| Forward voltage | VF | 1.1 | V | IF=200mA | 1 | ||
| Power dissipation | Ptot | 500 | mW | Tamb=75°C (Note 1) | 1 | ||
| Thermal resistance junction to ambient | RθJA | 300 | K/W | Note 1 | 1 | ||
| Junction temperature | TJ | 175 | °C | 1 | |||
| Storage temperature range | TSTG | -55 | 175 | °C | 1 |
CAD (KiCad official)
- Symbol:
ZMM5258B - Footprint:
Diode_SMD:D_MiniMELF - 3D model: MiniMELF (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JSMSEMI datasheet (3 pp, sha256
89f66f59e02dfcfe, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).