# B59840C0160A070

**TDK** · Sensors, Transducers · Disc

B59840C0160A070 from TDK, in a Disc. 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 lead of the non-polarized PTC thermistor, in series with the protected circuit, for a rated voltage of 110 V DC or AC and a maximum operating voltage of 160 V DC or AC (TA = 60 °C). |
| 2 | 2 | passive | Second lead of the non-polarized PTC thermistor, in series with the protected circuit, with a lead diameter of 0.6 mm for type C840, a minimum lead length of 35 mm and a rated current IR of 400 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TDK |
| Package | Disc |
| 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 |
|---|---|---|---|---|---|---|---|
| Tolerance of RR | ΔRR | -25 |  | 25 | % |  | 2 |
| Operating temperature range (V = 0) | Top | -40 |  | 125 | °C | V = 0 | 2 |
| Operating temperature range (V = Vmax) | Top | 0 |  | 60 | °C | V = Vmax | 2 |
| Max. operating voltage | Vmax |  |  | 160 | V | TA = 60 °C; DC or AC | 2 |
| Rated voltage | VR |  |  | 110 | V | DC or AC | 2 |
| Maximum switching current | ISmax |  |  | 4.1 | A | V = Vmax | 3 |
| Electrical endurance, cycling: resistance change | ΔR25/R25 |  |  | 25 | % | Room temperature, ISmax; Vmax; Number of cycles: 100 | 3 |
| Electrical endurance, constant: resistance change | ΔR25/R25 |  |  | 25 | % | Storage at Vmax and Top,max (@ Vmax); Test duration: 1000 h | 3 |
| Damp heat: resistance change | ΔR25/R25 |  |  | 10 | % | Temperature of air: 40 °C; Relative humidity: 93%; Duration: 56 days | 3 |
| Rapid change of temperature: resistance change | ΔR25/R25 |  |  | 10 | % | T1 = Top,min (0 V), T2 = Top,max (0 V); Number of cycles: 5 | 3 |
| Vibration: resistance change | ΔR25/R25 |  |  | 5 | % | Frequency range: 10 to 55 Hz; Displacement amplitude: 0.75 mm; Duration: 3 × 2 h | 3 |
| Shock: resistance change | ΔR25/R25 |  |  | 5 | % | Acceleration: 500 m/s2; Pulse duration: 11 ms; 6 × 3 pulses | 3 |
| Climatic sequence: resistance change | ΔR25/R25 |  |  | 10 | % | Dry heat T = Top,max (0 V), 16 h; Cold T = Top,min (0 V), 2 h; Damp heat 5 cycles | 3 |
| Rated resistance | RR |  | 6 |  | Ω |  | 3 |
| Minimum resistance | Rmin |  | 3.6 |  | Ω |  | 3 |
| Residual current | Ir |  | 18 |  | mA | V = Vmax | 3 |
| Rated current | IR |  | 400 |  | mA |  | 3 |
| Switching current | IS |  | 800 |  | mA |  | 3 |
| Reference temperature | Tref |  | 160 |  | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `B59840C0160A070`
- Footprint: `Adom_Gen:TDK_B59840`
- 3D model: Disc (KiCad packages3D, STEP)
- 3D model files: `b59840c0160a070-etched.step` / `b59840c0160a070-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `b59840c0160a070.step` / `b59840c0160a070.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_OC_Leaded_110V_C830_C890.pdf) (11 pp, sha256 `9413d0a7b7fa69d1`, 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/b59840c0160a070-datasheet.pdf)