KTR18 resistors are 1 / 4W, 500V rated voltage ceramic resistors suitable for power, signal and circuit protection applications. The resistors feature a robust construction that can withstand temperatures up to 155°C.
The KTR18 series are high‑voltage chip resistors (1206 size, 1/4 W) offered by ROHM. They feature a ruthenium‑oxide dielectric for superior reliability and are ISO‑9001 certified.
Key specifications include a power rating of 0.25 W, limiting element voltage of 500 V (up to 1000 V under double rating), operating temperature range from –55 °C to +155 °C, and various resistance tolerances. The resistors are supplied on paper tape reels (4 mm pitch) with a standard reel capacity of 5,000 pieces.
| Power rating | 0.25 W (1/4 W) |
|---|---|
| Limiting element voltage | 500 V |
| Maximum rated voltage (double rating) | 1000 V |
| Operating temperature range | -55 °C to +155 °C |
| Resistance tolerance (F code) | 1 % (41 %) |
| Resistance tolerance (J code) | 5 % (45 %) |
| Package dimensions | 0.30 mm × 0.25 mm |
| Reel packaging quantity | 5,000 pieces per reel |
The KTR18 resistor is rated for 1/4 W (0.25 W) power dissipation.
The limiting element voltage is 500 V, and it can be doubled to 1000 V for short‑duration overloads.
It can operate from –55 °C up to +155 °C.
They are supplied on paper tape reels with a 4 mm pitch, typically 5,000 parts per reel.