# 1N5355B-TP

**MCC(Micro Commercial Components)** · Zener Diodes · DO-15

1N5355B-TP from MCC(Micro Commercial Components), in a DO-15. 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 end with cathode band) of the 18V, 5W Zener diode; positive terminal in reverse-bias regulation at VZ 18V with test current 65mA. |
| 2 | A | passive | Anode of the 18V, 5W Zener diode; forward voltage maximum 1.2V at IF=1.0A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC(Micro Commercial Components) |
| Package | DO-15 |
| 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 tolerance (B suffix) | VZ | -5 |  | 5 | % | B suffix | 3 |
| Regulator (Zener) Voltage nominal | VZ |  | 18 |  | V | IZ = 65 mA, 25°C | 2 |
| Test Current | IZ |  | 65 |  | mA |  | 2 |
| Maximum Dynamic Impedance | ZZT |  |  | 2.5 | Ω | IZ = 65 mA | 2 |
| Maximum Reverse Current | IR |  |  | 0.5 | µA | VR = 13.7 V | 2 |
| Test Voltage | VR |  | 13.7 |  | V |  | 2 |
| Maximum Regulator Current | IZM |  |  | 264 | mA |  | 2 |
| Maximum Dynamic Knee Impedance | ZZK |  |  | 75 | Ω | @ 1.0 mA | 2 |
| Maximum Forward Voltage | VF |  |  | 1.2 | V | IF = 1.0 A | 1 |
| Power Dissipation | PD |  |  | 5 | W | TL = 75°C | 1 |
| Power Derating |  |  | 67 |  | mW/°C | Above 75°C | 1 |
| Operating Junction Temperature | TJ | -55 |  | 200 | °C | DC max 150°C, 200°C for pulsed low duty or non-repetitive | 1 |
| Storage Temperature | Tstg | -55 |  | 200 | °C |  | 1 |
| Thermal Resistance Junction to Lead | RθJL |  |  | 15 | °C/W | Maximum | 1 |
| Thermal Resistance Junction to Ambient | RθJA |  |  | 83 | °C/W | Maximum | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | Copper |  | Copper Pads to Each Terminal | 5 |

## CAD (KiCad official)

- Symbol: `1N5355B-TP`
- Footprint: `Diode_THT:D_DO-15_P12.70mm_Horizontal`
- 3D model: DO-15 (KiCad packages3D, STEP)

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [MCC(Micro Commercial Components) datasheet](docs/1n5355b-tp-datasheet.pdf) (6 pp, sha256 `38630415efaecd76`, retrieved 2026-10-31, 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/1n5355b-tp-datasheet.pdf)