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)

Provenance

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

Datasheet: TDK datasheet (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