# B59100C0100A070

**TDK** · Sensors, Transducers · Disc, 4.0mm Dia x 3.5mm W

B59100C0100A070 from TDK, in a Disc, 4.0mm Dia x 3.5mm W. 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 tinned lead of the non-polarized PTC thermistor, 0.5 mm diameter, 25 mm min. length, at 5 mm lead spacing; max. operating voltage 30 V DC (TA = 0 to 40 °C), max. measuring voltage 7.5 V DC. |
| 2 | 2 | passive | Second tinned lead of the non-polarized PTC thermistor, 0.5 mm diameter, 25 mm min. length, at 5 mm lead spacing; max. operating voltage 30 V DC (TA = 0 to 40 °C), max. measuring voltage 7.5 V DC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TDK |
| Package | Disc, 4.0mm Dia x 3.5mm W |
| Category | Sensors, Transducers |
| 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 |
|---|---|---|---|---|---|---|---|
| Rated resistance | RR |  |  | 100 | Ω | VPTC ≤ 2.5 V | 2 |
| Sensing resistance at Tsense minus ∆T | R(Tsense − ∆T) |  |  | 550 | Ω | VPTC ≤ 2.5 V; ∆T = ±5 K | 2 |
| Sensing resistance at Tsense plus ∆T | R(Tsense + ∆T) | 1330 |  |  | Ω | VPTC ≤ 2.5 V; ∆T = ±5 K | 2 |
| Sensing resistance at Tsense plus 15 K | R(Tsense + 15 K) | 4 |  |  | kΩ | VPTC ≤ 7.5 V | 2 |
| Max. operating voltage | Vmax |  |  | 30 | V DC | TA = 0 ... 40 °C | 2 |
| Max. measuring voltage | Vmeas,max |  |  | 7.5 | V DC | For TA see table Electrical specifications | 2 |
| Measuring voltage | Vmeas |  |  | 2.5 | V DC | TA = 40 °C ... Tsense +5 K | 2 |
| Operating temperature range (V = Vmax) | Top | 0 |  | 40 | °C | V = Vmax | 2 |

## CAD (KiCad official)

- Symbol: `B59100C0100A070`
- Footprint: `Adom_Gen:TDK_B59100`
- 3D model: Disc, 4.0mm Dia x 3.5mm W (KiCad packages3D, STEP)
- 3D model files: `b59100c0100a070-etched.step` / `b59100c0100a070-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `b59100c0100a070.step` / `b59100c0100a070.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TDK datasheet](https://www.tdk-electronics.tdk.com/inf/55/db/PTC/PTC_Sensors_B59100_C100.pdf) (10 pp, sha256 `126d815eebb4e7f4`, retrieved 2026-11-03, tier: manufacturer)
- **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/b59100c0100a070-datasheet.pdf)