# B59641A85A62

**TDK** · PTC Thermistors · 0603

B59641A85A62 from TDK, in a 0603. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1 | passive | One of the two symmetric terminations of the SMD PTC thermistor (EIA 0603). Non-polar, bidirectional; connect in series with the circuit being sensed/protected. Max operating voltage 32 V DC. |
| 2 | 2 | passive | Second of the two symmetric terminations of the SMD PTC thermistor (EIA 0603). Non-polar counterpart to pin 1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TDK |
| Package | 0603 |
| Category | Sensor |
| Pins | 2 |

## Ordering variants

- `B59641A85A62B59421A0075A062`
- `B59641A85A62B59421A0085A062`
- `B59641A85A62B59421A0095A062`
- `B59641A85A62B59421A0105A062`
- `B59641A85A62B59421A0115A062`
- `B59641A85A62B59421A0125A062`
- `B59641A85A62B59421A0135A062`
- `B59641A85A62B59641A0075A062`
- `B59641A85A62B59641A0085A062`
- `B59641A85A62B59641A0095A062`
- `B59641A85A62B59641A0095A562`
- `B59641A85A62B59641A0105A062`
- `B59641A85A62B59641A0105A562`
- `B59641A85A62B59641A0115A062`
- `B59641A85A62B59641A0125A062`
- `B59641A85A62B59641A0135A062`
- `B59641A85A62B59641A0145A062`
- `B59641A85A62B59721A0070A062`
- `B59641A85A62B59721A0080A062`
- `B59641A85A62B59721A0090A062`
- `B59641A85A62B59721A0090A562`
- `B59641A85A62B59721A0100A062`
- `B59641A85A62B59721A0100A562`
- `B59641A85A62B59721A0110A062`
- `B59641A85A62B59721A0120A062`
- `B59641A85A62B59721A0130A062`

## CAD (KiCad official)

- Symbol: `B59641A85A62`
- Footprint: `Resistor_SMD:R_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `b59641a85a62-etched.step` / `b59641a85a62-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `b59641a85a62.step` / `b59641a85a62.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TDK datasheet](docs/b59641a85a62-datasheet.pdf) (35 pp, sha256 `509b55d19482c4c6`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/b59641a85a62-datasheet.pdf)