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1SMB5952B
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EIC Semicon Zener Diodes, SMB(DO-214AA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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1SMB5952B
EIC Semicon · Zener Diodes · SMB(DO-214AA)
1SMB5952B from EIC Semicon, in a SMB(DO-214AA). 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 130 V (nominal VZ at 2.9 mA IZT) zener is reverse biased with this pin positive, with maximum steady-state dissipation of 3.0 W at TL = 75°C. |
| 2 | A | passive | Anode, the end opposite the color band; forward voltage is at most 1.5 V at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | EIC Semicon |
| Package | SMB(DO-214AA) |
| 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 tolerance | VZ | -5 | 5 | % | Suffix B indicates ±5% tolerance | 2 | |
| Maximum Zener Impedance | ZZT | 450 | Ω | @ IZT = 2.9 mA | 2 | ||
| Maximum Zener Knee Impedance | ZZK | 5000 | Ω | @ IZK = 0.25 mA | 2 | ||
| Maximum Reverse Leakage Current | IR | 1 | μA | @ VR = 98.8 V | 2 | ||
| Maximum DC Zener Current | IZM | 11 | mA | 2 | |||
| Maximum Forward Voltage | VF | 1.5 | Volts | IF = 200 mA | 1 | ||
| Maximum Steady State Power Dissipation | PD | 3 | W | TL = 75°C, measured at zero lead length | 1 | ||
| Derating above 75 °C | 40 | mW/°C | Derate above 75 °C | 1 | |||
| Maximum Steady State Power Dissipation | PD | 550 | mW | Ta = 25 °C, measured at zero lead length | 1 | ||
| Derating above 25 °C | 4.4 | mW/°C | Derate above 25 °C | 1 | |||
| Junction Temperature Range | TJ | -65 | 150 | °C | 1 | ||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 1 | ||
| Thermal Resistance Junction to Lead | RθJL | 25 | °C/W | 1 | |||
| Thermal Resistance Junction to Ambient | RθJA | 226 | °C/W | 1 | |||
| Nominal Zener Voltage | VZ | 130 | V | @ IZT = 2.9 mA | 2 | ||
| Zener Test Current | IZT | 2.9 | mA | 2 |
CAD (KiCad official)
- Symbol:
1SMB5952B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
1smb5952b-etched.step/1smb5952b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5952b.step/1smb5952b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: EIC Semicon datasheet (3 pp, sha256
a92bcce9354ab090, 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).
# 1SMB5952B
**EIC Semicon** · Zener Diodes · SMB(DO-214AA)
1SMB5952B from EIC Semicon, in a SMB(DO-214AA). 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 130 V (nominal VZ at 2.9 mA IZT) zener is reverse biased with this pin positive, with maximum steady-state dissipation of 3.0 W at TL = 75°C. |
| 2 | A | passive | Anode, the end opposite the color band; forward voltage is at most 1.5 V at IF = 200 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | EIC Semicon |
| Package | SMB(DO-214AA) |
| 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 tolerance | VZ | -5 | | 5 | % | Suffix B indicates ±5% tolerance | 2 |
| Maximum Zener Impedance | ZZT | | | 450 | Ω | @ IZT = 2.9 mA | 2 |
| Maximum Zener Knee Impedance | ZZK | | | 5000 | Ω | @ IZK = 0.25 mA | 2 |
| Maximum Reverse Leakage Current | IR | | | 1 | μA | @ VR = 98.8 V | 2 |
| Maximum DC Zener Current | IZM | | | 11 | mA | | 2 |
| Maximum Forward Voltage | VF | | | 1.5 | Volts | IF = 200 mA | 1 |
| Maximum Steady State Power Dissipation | PD | | | 3 | W | TL = 75°C, measured at zero lead length | 1 |
| Derating above 75 °C | | | | 40 | mW/°C | Derate above 75 °C | 1 |
| Maximum Steady State Power Dissipation | PD | | | 550 | mW | Ta = 25 °C, measured at zero lead length | 1 |
| Derating above 25 °C | | | | 4.4 | mW/°C | Derate above 25 °C | 1 |
| Junction Temperature Range | TJ | -65 | | 150 | °C | | 1 |
| Storage Temperature Range | Tstg | -65 | | 150 | °C | | 1 |
| Thermal Resistance Junction to Lead | RθJL | | | 25 | °C/W | | 1 |
| Thermal Resistance Junction to Ambient | RθJA | | | 226 | °C/W | | 1 |
| Nominal Zener Voltage | VZ | | 130 | | V | @ IZT = 2.9 mA | 2 |
| Zener Test Current | IZT | | 2.9 | | mA | | 2 |
## CAD (KiCad official)
- Symbol: `1SMB5952B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `1smb5952b-etched.step` / `1smb5952b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1smb5952b.step` / `1smb5952b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [EIC Semicon datasheet](docs/1smb5952b-datasheet.pdf) (3 pp, sha256 `a92bcce9354ab090`, 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/1smb5952b-datasheet.pdf)