# V9MLA0402NR

**Littelfuse** · Varistors · 0402

V9MLA0402NR from Littelfuse, 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 | TERMINAL 1 | passive | One metal end termination (Ni barrier, matte tin) of the bidirectional varistor, rated VM(DC) 9.0 V, VM(AC) 6.5 V continuous, with typical leakage <5µA and max <20µA at VM(DC). |
| 2 | TERMINAL 2 | passive | Opposite metal end termination of the bidirectional varistor, interchangeable with the other terminal, with 8/20µs surge rating of 20 A and 10/1000µs energy rating of 0.05 J for the V9MLA0402N. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal Voltage (varistor voltage), min | VN(DC) | 11 |  |  | V | @ 1mA DC | 2 |
| Nominal Voltage (varistor voltage), max | VN(DC) |  |  | 16 | V | @ 1mA DC | 2 |
| Maximum Clamping Voltage | VC |  |  | 30 | V | 8/20µs waveform, VC @ 1A | 2 |
| Maximum Continuous Working Voltage DC | VM (DC) |  |  | 9 | V | 125°C | 2 |
| Maximum Continuous Working Voltage AC RMS | VM (AC) |  |  | 6.5 | V | 125°C | 2 |
| Maximum Non-repetitive Surge Current | ITM |  |  | 20 | A | 8/20µs, 125°C | 2 |
| Maximum Non-repetitive Surge Energy | WTM |  |  | 0.05 | J | 10/1000µs, 125°C | 2 |
| Leakage current at VM(DC) |  |  | 5 | 20 | µA | at VM(DC), 0402 size (printed as <5µA typical, <20µA maximum) | 3 |
| Average power dissipation of transients |  |  |  | 0.03 | W | 0402 size, average power of transients not to exceed | 3 |
| Operating Ambient Temperature Range | TA | -40 |  | 125 | ºC | ML Series | 1 |
| Storage Temperature Range | TSTG | -40 |  | 150 | ºC | ML Series | 1 |
| Temperature Coefficient (αV) of Clamping Voltage | αV |  |  | 0.01 | %/ºC | Clamping voltage (VC) at specified test current; printed as <0.01 | 1 |
| Maximum thermal gradient during reflow |  |  |  | 4 | degrees per second | reflow process, chip not subjected to gradient steeper than | 7 |
| Typical Capacitance | C |  | 120 |  | pF | @ 1MHz | 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 |  | nickel | Lead-free (Pb-free) Soldering Recommendations Littelfuse offers the Nickel Barrier Termination option (see "N" | 7 |

## CAD (KiCad official)

- Symbol: `V9MLA0402NR`
- Footprint: `Resistor_SMD:R_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `v9mla0402nr-etched.step` / `v9mla0402nr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `v9mla0402nr.step` / `v9mla0402nr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590172669573160960) (9 pp, sha256 `86f47e51afa0f923`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/v9mla0402nr-datasheet.pdf)