component
ZMM5243B
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JSMSEMI Zener Diodes, MiniMELF. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ZMM5243B
JSMSEMI · Zener Diodes · MiniMELF
ZMM5243B 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 terminal, marked by the color band on the glass MINI-MELF case; the zener voltage (VZ 13 V nominal at IZT 9.5 mA for ZMM5243B) is developed with this end positive. |
| 2 | A | passive | Anode terminal at the end opposite the color band of the glass MINI-MELF case. |
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 |
|---|---|---|---|---|---|---|---|
| Nominal zener voltage | VZ | 13 | V | @ IZT = 9.5 mA | 2 | ||
| Zener voltage tolerance | -5 | 5 | % | "B" suffix | 1 | ||
| Test current | IZT | 9.5 | mA | 2 | |||
| Maximum zener impedance | ZZT | 13 | Ω | @ IZT | 2 | ||
| Maximum zener impedance (knee) | ZZK | 600 | Ω | @ IZK | 2 | ||
| Typical temperature coefficient | αVZ | 0.079 | %/°C | 2 | |||
| Maximum reverse leakage current | IR | 0.5 | µA | @ VR = 9.9 V | 2 | ||
| Maximum DC zener current | IZM | 35 | mA | 2 | |||
| 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:
ZMM5243B - 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
667ec1445134e305, 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).
# ZMM5243B
**JSMSEMI** · Zener Diodes · MiniMELF
ZMM5243B 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 terminal, marked by the color band on the glass MINI-MELF case; the zener voltage (VZ 13 V nominal at IZT 9.5 mA for ZMM5243B) is developed with this end positive. |
| 2 | A | passive | Anode terminal at the end opposite the color band of the glass MINI-MELF case. |
## 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 |
|---|---|---|---|---|---|---|---|
| Nominal zener voltage | VZ | | 13 | | V | @ IZT = 9.5 mA | 2 |
| Zener voltage tolerance | | -5 | | 5 | % | "B" suffix | 1 |
| Test current | IZT | | 9.5 | | mA | | 2 |
| Maximum zener impedance | ZZT | | | 13 | Ω | @ IZT | 2 |
| Maximum zener impedance (knee) | ZZK | | | 600 | Ω | @ IZK | 2 |
| Typical temperature coefficient | αVZ | | 0.079 | | %/°C | | 2 |
| Maximum reverse leakage current | IR | | | 0.5 | µA | @ VR = 9.9 V | 2 |
| Maximum DC zener current | IZM | | | 35 | mA | | 2 |
| 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: `ZMM5243B`
- 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/zmm5243b-datasheet.pdf) (3 pp, sha256 `667ec1445134e305`, 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/zmm5243b-datasheet.pdf)