# 1206T3A63V

**Walter Elec** · Disposable Fuses · 1206

1206T3A63V from Walter Elec, in a 1206. 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 fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Walter Elec |
| Package | 1206 |
| 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 |
|---|---|---|---|---|---|---|---|
| Pre-arcing time at 1.0In |  | 4 |  |  | hrs | I=1.0In; 25℃; rated current 1A to 10A | 4 |
| Pre-arcing time at 2.0In |  | 1 |  | 120 | sec | I=2.0In; 25℃; rated current 1A to 10A | 4 |
| Pre-arcing time at 3.0In |  | 0.1 |  | 3 | sec | I=3.0In; 25℃; rated current 1A to 10A | 4 |
| Pre-arcing time at 8.0In |  | 2 |  | 50 | ms | I=8.0In; 25℃; rated current 1A to 10A | 4 |
| Pre-arcing time at 10.0In |  | 0.2 |  | 20 | ms | I=10.0In; 25℃; rated current 1A to 10A | 4 |
| Resistance change after soldering heat | ΔR | -15 |  | 15 | % | T=250±5℃, t=30±5 s; MIL-STD-202 Method 210F Condition K | 6 |
| Resistance change after thermal shock | ΔR | -10 |  | 10 | % | -65℃ 15min ~ 25℃ 5min ~ +125℃ 15min; 100 cycles; MIL-STD-202 Method 107G Condition B-3 | 6 |
| Resistance change after mechanical shock | ΔR | -10 |  | 10 | % | a=100G for 11ms, 5 pulses; MIL-STD-202 Method 213B | 6 |
| Solder coverage |  | 95 |  |  | % | T=245±5℃, t=5s±0.5s; MIL-STD-202 Method 208 | 6 |
| Storage temperature |  | 10 |  | 40 | ℃ | Airtight, relative humidity ≤75%, storage up to 2 years | 7 |
| Operating temperature |  | -55 |  | 150 | ℃ |  | 7 |
| Soldering time above 220℃ |  |  |  | 60 | sec | Soldering phase, min. 220℃ | 8 |
| Time at maximum reflow temperature |  |  |  | 10 | sec | Maximum temperature 260±5℃ | 8 |
| Nominal resistance |  |  | 0.025 |  | Ω | Measured with <10% rated current; 3A rating (MPN 1206T3A63V) | 3 |
| Nominal melting I2t |  |  | 2.332 |  | A2s | Measured at 10 ms opening time; 3A rating | 3 |
| Rated current |  |  | 3 |  | A | 3A rating (marking T1) | 3 |
| Rated voltage |  |  | 63 |  | VDC | 63V rating | 3 |

## CAD (KiCad official)

- Symbol: `1206T3A63V`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `1206t3a63v-etched.step` / `1206t3a63v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1206t3a63v.step` / `1206t3a63v.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Walter Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905607860793344) (12 pp, sha256 `e88573310eecb119`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal convention` (convention), consensus `off` (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/1206t3a63v-datasheet.pdf)