component
ZMM5250B
Public Made by Adomby adom
JSMSEMI Zener Diodes, MiniMELF. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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ZMM5250B
JSMSEMI · Zener Diodes · MiniMELF
ZMM5250B 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
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) | -5 | 5 | % | B suffix ±5% | 1 | ||
| Maximum zener impedance | ZZT | 25 | Ω | @ IZT = 6.2 mA | 2 | ||
| Maximum DC zener current | IZM | 23 | mA | 2 | |||
| Maximum zener impedance | ZZK | 600 | Ω | @ IZK | 2 | ||
| Maximum reverse leakage current | IR | 0.1 | µA | @ VR = 15 V | 2 | ||
| Power dissipation | Ptot | 500 | mW | Tamb=75°C (Note 1) | 1 | ||
| Maximum thermal resistance junction to ambient | RJA | 300 | K/W | Note 1 | 1 | ||
| Junction temperature | TJ | 175 | °C | 1 | |||
| Storage temperature range | TSTG | -55 | 175 | °C | 1 | ||
| Forward voltage | VF | 1.1 | V | @ IF = 200 mA | 1 | ||
| Nominal zener voltage | VZ | 20 | V | @ IZT = 6.2 mA | 2 | ||
| Typical temperature coefficient | ΔVZ | 0.086 | %/°C | 2 |
CAD (KiCad official)
- Symbol:
ZMM5250B - 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
bdb9f5e4ac8d524a, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).
# ZMM5250B
**JSMSEMI** · Zener Diodes · MiniMELF
ZMM5250B 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
## 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) | | -5 | | 5 | % | B suffix ±5% | 1 |
| Maximum zener impedance | ZZT | | | 25 | Ω | @ IZT = 6.2 mA | 2 |
| Maximum DC zener current | IZM | | | 23 | mA | | 2 |
| Maximum zener impedance | ZZK | | | 600 | Ω | @ IZK | 2 |
| Maximum reverse leakage current | IR | | | 0.1 | µA | @ VR = 15 V | 2 |
| Power dissipation | Ptot | | | 500 | mW | Tamb=75°C (Note 1) | 1 |
| Maximum thermal resistance junction to ambient | RJA | | | 300 | K/W | Note 1 | 1 |
| Junction temperature | TJ | | | 175 | °C | | 1 |
| Storage temperature range | TSTG | -55 | | 175 | °C | | 1 |
| Forward voltage | VF | | | 1.1 | V | @ IF = 200 mA | 1 |
| Nominal zener voltage | VZ | | 20 | | V | @ IZT = 6.2 mA | 2 |
| Typical temperature coefficient | ΔVZ | | 0.086 | | %/°C | | 2 |
## CAD (KiCad official)
- Symbol: `ZMM5250B`
- 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](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590191685952040960) (3 pp, sha256 `bdb9f5e4ac8d524a`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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).
[Datasheet PDF](docs/zmm5250b-datasheet.pdf)