# B59252J140B20

**TDK** · Sensors, Transducers · Radial

B59252J140B20 from TDK, in a Radial. 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 | Non-polarized solder pin of the PTC thermistor (lead spacing LS 10.0 mm nominal), rated for Vmax 780 VRMS and Vlink 1100 VDC at Tamb -40 °C to +85 °C. |
| 2 | 2 | passive | Non-polarized solder pin of the PTC thermistor (lead spacing LS 10.0 mm nominal), rated for Vmax 780 VRMS and Vlink 1100 VDC at Tamb -40 °C to +85 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TDK |
| Package | Radial |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum operating voltage | Vmax |  |  | 780 | VRMS | Tamb = -40 °C to +85 °C | 3 |
| DC link voltage | Vlink |  |  | 1100 | VDC | Tamb = -40 °C to +85 °C | 3 |
| Rated resistance @ +25 °C | R25 | 350 | 500 | 650 | Ω | Tamb = +25 °C ±0.1 °C | 3 |
| Operating temperature range | Top | -40 |  | 125 | °C | V = 0 | 3 |
| Operating temperature range | Top | -40 |  | 85 | °C | V = Vlinkmax | 3 |
| Thermal capacity | Cth |  | 2.3 |  | J/K |  | 3 |
| Thermal time constant | τth |  | 150 |  | s |  | 3 |
| Reference temperature | Tref |  | 140 |  | °C |  | 3 |

## 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 |
|---|---|---|---|---|
| housing | PBT |  | 1 Base PBT+30%GF | 3 |
| contacts |  | tin | ◼ Sn-plated lead-free solder pins ◼ Manufacturer's logo, type designation and date code YYWW (laser-printing) | 2 |

## CAD (KiCad official)

- Symbol: `B59252J140B20`
- Footprint: `Adom_Gen:TDK_B59252`
- 3D model: Radial (KiCad packages3D, STEP)
- 3D model files: `b59252j140b20-etched.step` / `b59252j140b20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `b59252j140b20.step` / `b59252j140b20.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/ds/ptc_icl_in_housing_j252.pdf) (11 pp, sha256 `a08f145cdda5d6c4`, 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/b59252j140b20-datasheet.pdf)