TCTR0805F100KF4000T from RESI, in a 0805. 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	Terminal 1 of the NTC thermistor. Two-terminal chip resistor-style device; polarity is not defined. Connects to one end of the sintered NTC element via end electrodes (inner electrode + outer plating).
2	2	passive	Terminal 2 of the NTC thermistor. Opposite end electrode of the two-terminal 0805 chip NTC. Non-polarized.

Key specifications

Parameter	Value
Manufacturer	RESI
Package	0805
Category	Sensor
Pins	2

Ordering variants

Same part, different packaging or reel option.

TCTR0805F100KF4000T
TCTR0603
TCTR0402

CAD (KiCad official)

Symbol: TCTR0805F100KF4000T
Footprint: Resistor_SMD:R_0805_2012Metric
3D model: 0805 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tctr0805f100kf4000t.step`	40 KB	You want the bare part, or you mark your own boards.
`tctr0805f100kf4000t-etched.step`	3.3 MB	You want the part with `TCTR0805F100KF4000T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 797 faces against 26 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: RESI datasheet (9 pp, sha256 59f3ac30436c02a2, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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