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MM1Z39B
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Shandong Jingdao Microelectronics Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MM1Z39B
Shandong Jingdao Microelectronics · Zener Diodes · SOD-123
MM1Z39B from Shandong Jingdao Microelectronics, in a SOD-123. 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 | Cathode | passive | Cathode of the zener diode; MM1Z39B has a 36.72-39.78 V nominal zener voltage range (38.22 V min, 39 V nom) at IZT = 5 mA. |
| 2 | A | passive | Anode of the zener diode; forward voltage is 0.9 V at IF = 10 mA and total power dissipation is max 500 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shandong Jingdao Microelectronics |
| Package | SOD-123 |
| 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 | VZT | 38.22 | 39 | 39.78 | V | at IZT, pulses 20 ms, Ta=25°C | 2 |
| Zener Test Current | IZT | 2.5 | mA | Ta=25°C | 2 | ||
| Dynamic Impedance | ZZT | 100 | Ω | at IZT | 2 | ||
| Zener Voltage Tolerance | -2 | 2 | % | approximately | 1 | ||
| Power Dissipation | Ptot | 500 | mW | Ta=25°C | 1 | ||
| Operating and Storage Temperature Range | Tj, Tstg | -55 | 150 | °C | 1 | ||
| Forward Voltage | VF | 0.9 | V | IF = 10 mA | 1 | ||
| Thermal Resistance Junction to Ambient | RθJA | 340 | °C/W | PCB mounted, 2.0" x 2.0" (5 x 5 cm) copper pads | 1 |
CAD (KiCad official)
- Symbol:
MM1Z39B - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
mm1z39b-etched.step/mm1z39b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mm1z39b.step/mm1z39b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shandong Jingdao Microelectronics datasheet (3 pp, sha256
b0fd93ec2c97a609, 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).
# MM1Z39B
**Shandong Jingdao Microelectronics** · Zener Diodes · SOD-123
MM1Z39B from Shandong Jingdao Microelectronics, in a SOD-123. 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 | Cathode | passive | Cathode of the zener diode; MM1Z39B has a 36.72-39.78 V nominal zener voltage range (38.22 V min, 39 V nom) at IZT = 5 mA. |
| 2 | A | passive | Anode of the zener diode; forward voltage is 0.9 V at IF = 10 mA and total power dissipation is max 500 mW. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shandong Jingdao Microelectronics |
| Package | SOD-123 |
| 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 | VZT | 38.22 | 39 | 39.78 | V | at IZT, pulses 20 ms, Ta=25°C | 2 |
| Zener Test Current | IZT | | 2.5 | | mA | Ta=25°C | 2 |
| Dynamic Impedance | ZZT | | | 100 | Ω | at IZT | 2 |
| Zener Voltage Tolerance | | -2 | | 2 | % | approximately | 1 |
| Power Dissipation | Ptot | | | 500 | mW | Ta=25°C | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -55 | | 150 | °C | | 1 |
| Forward Voltage | VF | | | 0.9 | V | IF = 10 mA | 1 |
| Thermal Resistance Junction to Ambient | RθJA | | 340 | | °C/W | PCB mounted, 2.0" x 2.0" (5 x 5 cm) copper pads | 1 |
## CAD (KiCad official)
- Symbol: `MM1Z39B`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `mm1z39b-etched.step` / `mm1z39b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm1z39b.step` / `mm1z39b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Shandong Jingdao Microelectronics datasheet](docs/mm1z39b-datasheet.pdf) (3 pp, sha256 `b0fd93ec2c97a609`, retrieved 2026-10-23, 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/mm1z39b-datasheet.pdf)