component
MVR1812-390G
Public Made by Adomby adom
DOWO Varistors, 1812. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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.
README
markdownMVR1812-390G
DOWO · Varistors · 1812
MVR1812-390G from DOWO, in a 1812. 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 | Terminal 1 of an unpolarised resistor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised resistor; either orientation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | 1812 |
| 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 |
|---|---|---|---|---|---|---|---|
| Varistor voltage (measured at 1mA DC) | VB | 35 | 39 | 42 | V | Measured at 1mA DC | 1 |
| Maximum allowable continuous DC voltage | VDC | 30 | V | 1 | |||
| Maximum allowable continuous AC voltage | VRMS | 24 | V | AC voltage at 50~60Hz | 1 | ||
| Typical capacitance value tolerance | -40 | 40 | % | Typical capacitance value tolerance (printed ±40 %) | 1 | ||
| Typical capacitance value | C | 950 | pF | Measured at f=1MHz, Vrms=0.5V | 1 | ||
| Maximum clamping voltage | VC | 65 | V | Measured at 10A by 8/20µs pulse | 1 | ||
| Rated peak single pulse transient current | I P | 500 | A | Measured by 8/20µs pulse | 1 | ||
| Maximum energy absorption | E | 5 | J | 10/1000µs | 1 | ||
| Response time | T rise | 5 | ns | Printed as <5 ns | 1 | ||
| Leakage current at VDC (initial state) | IL | 50 | µA | Leakage current at VDC (At initial state) | 1 | ||
| Leakage current at VDC (after reliability test) | ILA | 100 | µA | Leakage current at VDC (After reliability Test) | 1 | ||
| Operating ambient temperature | -40 | 125 | ℃ | 1 | |||
| Storage temperature | -40 | 125 | ℃ | 1 | |||
| Varistor voltage change after high temperature storage | -10 | 10 | % | 125℃ for 1000 hours, no load | 3 | ||
| Varistor voltage change after temperature cycle | -10 | 10 | % | Five temperature cycles between -40℃ and 125℃ | 3 | ||
| Varistor voltage change after high temperature load | -10 | 10 | % | 85℃, 1000 hours, maximum allowable voltage applied | 3 | ||
| Varistor voltage change after damp heat load | -10 | 10 | % | 40℃, 90 to 95%RH, 1000 hours, maximum allowable voltage applied | 3 | ||
| Varistor voltage change after low temperature storage | -10 | 10 | % | -40℃, no load, 1000 hours | 3 |
CAD (KiCad official)
- Symbol:
MVR1812-390G - Footprint:
Resistor_SMD:R_1812_4532Metric - 3D model: 1812 (KiCad packages3D, STEP)
- 3D model files:
mvr1812-390g-etched.step/mvr1812-390g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mvr1812-390g.step/mvr1812-390g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DOWO datasheet (5 pp, sha256
9ef29e0dc937565f, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal 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).