component
5.0SMDJ300A
Public Made by Adomby adom
Zhengxin(正芯) , DO-214AB(SMC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdown5.0SMDJ300A
Zhengxin(正芯) · IC · DO-214AB(SMC)
5.0SMDJ300A from Zhengxin(正芯), in a DO-214AB(SMC). 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 of the unidirectional TVS, marked by the band on the package, connected to the protected line (VRWM 300 V, VBR 335-371 V at 1.0 mA, max clamping 486 V at 10.3 A). |
| 2 | A | passive | Anode terminal of the unidirectional TVS, at the end opposite the cathode band, usually connected to ground (5000 W peak pulse power at 10/1000 μs). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Zhengxin(正芯) |
| Package | DO-214AB(SMC) |
| Category | |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (min) | VBR | 335 | V | @ IT = 1.0 mA | 3 | ||
| Breakdown voltage (max) | VBR | 371 | V | @ IT = 1.0 mA | 3 | ||
| Maximum reverse leakage current | IR | 5 | μA | @ VRWM = 300 V | 3 | ||
| Maximum reverse surge current | IPP | 10.3 | A | 3 | |||
| Maximum clamping voltage | VC | 486 | V | @ IPP | 3 | ||
| Maximum instantaneous forward voltage | VFM | 5 | V | at 100 A, unidirectional only; 5.0 V max for devices with VBR > 85 V | 1 | ||
| Peak power dissipation | PPPM | 5000 | W | 10/1000 μs waveform | 1 | ||
| Power dissipation on infinite heat sink | PD | 6.5 | W | on infinite heat sink at TL = 75 ℃ | 1 | ||
| Peak forward surge current | IFSM | 300 | A | 8.3 ms single half sine-wave, unidirectional only | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| Thermal resistance, junction to ambient | RθJ-A | 75 | ℃/W | junction to ambient | 2 | ||
| Thermal resistance, junction to lead | RθJ-L | 15 | ℃/W | junction to lead | 2 | ||
| Thermal resistance, junction to case | RθJ-C | 13 | ℃/W | junction to case | 2 |
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 | tin | ● Terminals: Tin plated leads, solderable per J-STD002 and JESD22-B102 ● Polarity: For uni-directional types the band denotes | 1 |
CAD (KiCad official)
- Symbol:
5.0SMDJ300A - Footprint:
Diode_SMD:D_SMC - 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
- 3D model files:
5-0smdj300a-etched.step/5-0smdj300a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);5-0smdj300a.step/5-0smdj300a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Zhengxin(正芯) datasheet (5 pp, sha256
b6677432328dd8c0, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).