# SMD1210B150TFT

**Brightking** · Resettable Fuses · 1210

SMD1210B150TFT from Brightking, in a 1210. 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 | First terminal of the non-polarized PTC resettable fuse, a solder-plated copper end terminal on the 2.00 mm-gap pad layout (1.00 x 2.50 mm pad); rated Ihold 1.50 A, Itrip 3.00 A, Vmax 6 Vdc, Imax 100 A. |
| 2 | 2 | passive | Second terminal of the non-polarized PTC resettable fuse, a solder-plated copper end terminal on the 2.00 mm-gap pad layout (1.00 x 2.50 mm pad); rated Ihold 1.50 A, Itrip 3.00 A, Vmax 6 Vdc, Imax 100 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Brightking |
| Package | 1210 |
| 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 |
|---|---|---|---|---|---|---|---|
| Hold current (Ihold) | Ihold |  |  | 1.5 | A | 23℃ still air; maximum current device passes without tripping | 2 |
| Trip current (Itrip) | Itrip | 3 |  |  | A | 23℃ still air; minimum current at which device trips | 2 |
| Maximum voltage (Vmax) | Vmax |  |  | 6 | Vdc | At rated current (Imax) | 2 |
| Maximum fault current (Imax) | Imax |  |  | 100 | A | At rated voltage (Vmax) | 2 |
| Power dissipated in tripped state (Pd) | Pd |  | 0.8 |  | W | Tripped state, 23℃ still air, typical | 2 |
| Maximum time to trip | Time To Trip |  |  | 0.3 | Sec. | At current 8.00 A | 2 |
| Minimum resistance (initial, un-soldered) | Rmin | 0.03 |  |  | Ω | Initial (un-soldered) state | 2 |
| Maximum resistance (R1max) | R1max |  |  | 0.12 | Ω | 23℃, measured one hour after tripping or reflow soldering of 260℃ for 20 sec. | 2 |
| Recommended hold current at ambient -40℃ | Ihold |  |  | 2.3 | A | Ambient operation temperature -40℃ (thermal derating chart) | 4 |
| Recommended hold current at ambient -20℃ | Ihold |  |  | 2.02 | A | Ambient operation temperature -20℃ (thermal derating chart) | 4 |
| Recommended hold current at ambient 0℃ | Ihold |  |  | 1.76 | A | Ambient operation temperature 0℃ (thermal derating chart) | 4 |
| Recommended hold current at ambient 23℃ | Ihold |  |  | 1.5 | A | Ambient operation temperature 23℃ (thermal derating chart) | 4 |
| Recommended hold current at ambient 40℃ | Ihold |  |  | 1.24 | A | Ambient operation temperature 40℃ (thermal derating chart) | 4 |
| Recommended hold current at ambient 50℃ | Ihold |  |  | 1.11 | A | Ambient operation temperature 50℃ (thermal derating chart) | 4 |
| Recommended hold current at ambient 60℃ | Ihold |  |  | 1 | A | Ambient operation temperature 60℃ (thermal derating chart) | 4 |
| Recommended hold current at ambient 70℃ | Ihold |  |  | 0.85 | A | Ambient operation temperature 70℃ (thermal derating chart) | 4 |
| Recommended hold current at ambient 85℃ | Ihold |  |  | 0.65 | A | Ambient operation temperature 85℃ (thermal derating chart) | 4 |
| Operating / storage temperature |  | -40 |  | 85 | ℃ | Operating and storage | 7 |
| Maximum device surface temperature in tripped state |  |  |  | 125 | ℃ | Tripped state | 7 |
| Storage temperature (recommended storage condition) |  | 0 |  | 35 | ℃ | Storage, ≤70%RH | 6 |
| Passive aging resistance change |  | -50 |  | 50 | % | +85℃, 1000 hours; typical resistance change (printed ±50%) | 7 |
| Humidity aging resistance change |  | -50 |  | 50 | % | +85℃, 85% R.H., 1000 hours; typical resistance change (printed ±50%) | 7 |
| Thermal shock resistance change |  |  | -50 |  | % | MIL-STD-202 Method 107G, +85℃/-40℃, 20 cycles; typical resistance change | 7 |

## CAD (KiCad official)

- Symbol: `SMD1210B150TFT`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `smd1210b150tft-etched.step` / `smd1210b150tft-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smd1210b150tft.step` / `smd1210b150tft.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Brightking datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588903004690505728) (9 pp, sha256 `02d03e61b9be4912`, retrieved 2026-10-15, 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/smd1210b150tft-datasheet.pdf)