component
SZ155B
Public Made by Adomby adom
EIC Semicon Zener Diodes, DO-214AC(SMA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
SZ155B
EIC Semicon · Zener Diodes · DO-214AC(SMA)
SZ155B from EIC Semicon, in a DO-214AC(SMA). 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 | EIC Semicon |
| Package | DO-214AC(SMA) |
| 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) at IZT | ZZT | 7 | Ω | @ IZT = 49.0 mA | 2 | ||
| Maximum zener impedance (ZZK) at IZK | ZZK | 550 | Ω | @ IZK = 1.0 mA | 2 | ||
| Maximum reverse leakage current | IR | 10 | μA | @ VR = 1.0 V | 2 | ||
| Maximum DC zener current | IZM | 178 | mA | 2 | |||
| Maximum reverse surge current | IRM | 890 | mApk | non-repetitive 8.3 ms pulse width square wave or equivalent sine-wave superimposed on IZT per JEDEC Method (Note 2) | 2 | ||
| DC power dissipation | PD | 1 | W | TL = 75 °C (Note 1); P.C.B. mounted on 0.31x0.31x0.08" (8x8x2mm) copper areas pads | 1 | ||
| Maximum forward voltage | VF | 1.2 | V | IF = 200 mA | 1 | ||
| Junction temperature range | TJ | -55 | 150 | °C | 1 | ||
| Storage temperature range | TS | -55 | 150 | °C | 1 | ||
| Nominal zener voltage tolerance (standard, fourth character 5) | -5 | 5 | % | Standard tolerance on nominal zener voltage per Note (1) | 2 | ||
| Nominal zener voltage | VZ | 5.1 | V | Nominal Zener voltage, test current IZT = 49.0 mA | 2 |
CAD (KiCad official)
- Symbol:
SZ155B - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
sz155b-etched.step/sz155b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sz155b.step/sz155b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: EIC Semicon datasheet (2 pp, sha256
a984d20c4b276f48, 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).
# SZ155B
**EIC Semicon** · Zener Diodes · DO-214AC(SMA)
SZ155B from EIC Semicon, in a DO-214AC(SMA). 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 | EIC Semicon |
| Package | DO-214AC(SMA) |
| 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) at IZT | ZZT | | | 7 | Ω | @ IZT = 49.0 mA | 2 |
| Maximum zener impedance (ZZK) at IZK | ZZK | | | 550 | Ω | @ IZK = 1.0 mA | 2 |
| Maximum reverse leakage current | IR | | | 10 | μA | @ VR = 1.0 V | 2 |
| Maximum DC zener current | IZM | | | 178 | mA | | 2 |
| Maximum reverse surge current | IRM | | | 890 | mApk | non-repetitive 8.3 ms pulse width square wave or equivalent sine-wave superimposed on IZT per JEDEC Method (Note 2) | 2 |
| DC power dissipation | PD | | | 1 | W | TL = 75 °C (Note 1); P.C.B. mounted on 0.31x0.31x0.08" (8x8x2mm) copper areas pads | 1 |
| Maximum forward voltage | VF | | | 1.2 | V | IF = 200 mA | 1 |
| Junction temperature range | TJ | -55 | | 150 | °C | | 1 |
| Storage temperature range | TS | -55 | | 150 | °C | | 1 |
| Nominal zener voltage tolerance (standard, fourth character 5) | | -5 | | 5 | % | Standard tolerance on nominal zener voltage per Note (1) | 2 |
| Nominal zener voltage | VZ | | 5.1 | | V | Nominal Zener voltage, test current IZT = 49.0 mA | 2 |
## CAD (KiCad official)
- Symbol: `SZ155B`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `sz155b-etched.step` / `sz155b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sz155b.step` / `sz155b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [EIC Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590234495719661568) (2 pp, sha256 `a984d20c4b276f48`, 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/sz155b-datasheet.pdf)