component
KSMD0402E5R5N180T
Public Made by Adomby adom
KUU Varistors, 0402. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownKSMD0402E5R5N180T
KUU · Varistors · 0402
KSMD0402E5R5N180T from KUU, in a 0402. 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 | 1 | passive | Non-polarized terminal electrode (Ag inside, Ni-Sn plated outside) of the chip varistor, rated 18.0 VDC / 12.7 VAC max working voltage with 31.0-38.0 V varistor voltage at 1mA DC. |
| 2 | 2 | passive | Second non-polarized terminal electrode of the chip varistor, interchangeable with the other terminal, with 58 V max clamping voltage at 8/20μs and 1 A peak surge current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| Package | 0402 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Max. clamping voltage (footnote *1) | VC*1 | 58 | V | 8/20μs | 1 | ||
| Max. clamping voltage (footnote *2) | VC*2 | 70 | V | ESD | 1 | ||
| Peak current | IP | 1 | A | 8/20μs | 1 | ||
| Rated single pulse transient energy | ET | 0.003 | J | 10/1000μs | 1 | ||
| Max. working voltage DC | VWDC | 18 | V | DC | 1 | ||
| Max. working voltage AC RMS | VWAC | 12.7 | V | AC RMS | 1 | ||
| Leakage current | IL | 20 | μA | Measuring voltage: maximum DC working voltage | 2 | ||
| Operating and storage temperature range (individual chip without packing) | -55 | 125 | °C | Individual chip without packing | 1 | ||
| Storage temperature range (packaging conditions) | -10 | 40 | °C | Packaging conditions, RH 70% max | 1 | ||
| Varistor voltage change after resistance to soldering heat | -10 | 10 | % | 260±3°C, 5 s, Sn/3.0Ag/0.5Cu | 3 | ||
| Varistor voltage change after thermal shock | -10 | 10 | % | -55°C 30 min to 125°C 30 min, 100 cycles | 3 | ||
| Varistor voltage change after resistance to low temperature | -10 | 10 | % | -55±2°C, 1000+24 hours | 3 | ||
| Varistor voltage change after resistance to high temperature | -10 | 10 | % | 125±2°C, 1000+24 hours | 3 | ||
| Varistor voltage change after damp heat (steady state) | -10 | 10 | % | 60±2°C, 90 to 95% RH, 1000+24 hours | 3 | ||
| Varistor voltage change after loading under damp heat | -10 | 10 | % | 60±2°C, 90 to 95% RH, 1000+24 hours, DC working voltage | 4 | ||
| Varistor voltage change after loading at high temperature (life test) | -10 | 10 | % | 125±2°C, 1000+24 hours, DC working voltage | 4 | ||
| Varistor voltage change after maximum surge current | -10 | 10 | % | IEC61000-4-5, 8/20μs, applied maximum surge current IP | 4 | ||
| Varistor voltage change after maximum surge energy | -10 | 10 | % | IEC61000-4-5, 10/1000μs, applied maximum surge energy ET | 4 | ||
| Varistor voltage change after ESD life | -10 | 10 | % | IEC61000-4-2 contact discharge, 10 times within 10 s | 4 | ||
| Varistor voltage change after ESD test | -10 | 10 | % | IEC61000-4-2 air discharge, 10 times within 10 s | 4 | ||
| Typical capacitance | C | 5 | pF | @0.5Vrms, 1MHz | 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 | tin | Ĺ-1 Terminal electrode: Inside (Ag) Ĺ-2 Outside (Electro-plating Ni-Sn) | 1 |
CAD (KiCad official)
- Symbol:
KSMD0402E5R5N180T - Footprint:
Resistor_SMD:R_0402_1005Metric - 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files:
ksmd0402e5r5n180t-etched.step/ksmd0402e5r5n180t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ksmd0402e5r5n180t.step/ksmd0402e5r5n180t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KUU datasheet (5 pp, sha256
5eeeaa2046b151ee, 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).