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ZMM5231
Public Made by Adomby adom
JSMSEMI Zener Diodes, MiniMELF. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ZMM5231
JSMSEMI · Zener Diodes · MiniMELF
ZMM5231 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, marked by the color band on the MINI-MELF glass case; the zener (5.1 V at 20 mA for ZMM5231) is reverse-biased with this end positive. |
| 2 | A | passive | Anode end of the MINI-MELF glass case, opposite the color band cathode end. |
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 |
|---|---|---|---|---|---|---|---|
| Maximum zener impedance | ZZT | 17 | Ω | @ IZT = 20 mA | 2 | ||
| Maximum zener impedance | ZZK | 1600 | Ω | @ IZK | 2 | ||
| Maximum reverse leakage current | IR | 5 | µA | @ VR = 2.0 V | 2 | ||
| Maximum DC zener current | IZM | 89 | mA | 2 | |||
| Power dissipation | Ptot | 500 | mW | Tamb=75°C (Note 1) | 1 | ||
| Junction temperature | TJ | 175 | °C | 1 | |||
| Storage temperature range | TSTG | -55 | 175 | °C | 1 | ||
| Thermal resistance junction to ambient | RTJA | 300 | K/W | Note 1: electrodes kept at ambient temperature | 1 | ||
| Nominal zener voltage | VZ | 5.1 | V | @ IZT = 20 mA | 2 | ||
| Zener test current | IZT | 20 | mA | 2 | |||
| Typical temperature coefficient | αVZ | 0.03 | %/°C | printed as ±0.030 | 2 |
CAD (KiCad official)
- Symbol:
ZMM5231 - 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
427bf4fe79fea6ac, retrieved 2026-10-22, 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).
# ZMM5231
**JSMSEMI** · Zener Diodes · MiniMELF
ZMM5231 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, marked by the color band on the MINI-MELF glass case; the zener (5.1 V at 20 mA for ZMM5231) is reverse-biased with this end positive. |
| 2 | A | passive | Anode end of the MINI-MELF glass case, opposite the color band cathode end. |
## 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 |
|---|---|---|---|---|---|---|---|
| Maximum zener impedance | ZZT | | | 17 | Ω | @ IZT = 20 mA | 2 |
| Maximum zener impedance | ZZK | | | 1600 | Ω | @ IZK | 2 |
| Maximum reverse leakage current | IR | | | 5 | µA | @ VR = 2.0 V | 2 |
| Maximum DC zener current | IZM | | | 89 | mA | | 2 |
| Power dissipation | Ptot | | | 500 | mW | Tamb=75°C (Note 1) | 1 |
| Junction temperature | TJ | | | 175 | °C | | 1 |
| Storage temperature range | TSTG | -55 | | 175 | °C | | 1 |
| Thermal resistance junction to ambient | RTJA | | | 300 | K/W | Note 1: electrodes kept at ambient temperature | 1 |
| Nominal zener voltage | VZ | | 5.1 | | V | @ IZT = 20 mA | 2 |
| Zener test current | IZT | | 20 | | mA | | 2 |
| Typical temperature coefficient | αVZ | | 0.03 | | %/°C | printed as ±0.030 | 2 |
## CAD (KiCad official)
- Symbol: `ZMM5231`
- 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](docs/zmm5231-datasheet.pdf) (3 pp, sha256 `427bf4fe79fea6ac`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/zmm5231-datasheet.pdf)