The Nikkohm datasheet details specifications, dimensions, and ordering information for high‑power wire‑wound resistors ranging from 50 W to 500 W…
Nikkohm high‑power wire‑wound resistors are offered in flat‑shaped aluminum‑housed versions with power ratings from 50 W to 500 W. They are suitable for industrial power electronics, switching power supplies, motor‑control braking, and automotive rush‑current protection. The resistors feature a minimum resistance of 1 Ω with tight tolerance and a 10 mm thickness for efficient heat dissipation.
Key specifications include power ratings up to 500 W, resistance tolerances as low as ±0.5 %, operating temperature ranges of –55 °C to +200 °C (cement‑filled) or –55 °C to +150 °C (silicone‑filled), and a compact diameter of 4‑5.3 mm. Ordering information provides part numbers, insulating materials, and lead‑wire options such as 0.75 mm² leads.
| Power rating | 50 W to 500 W |
|---|---|
| Resistance tolerance | ±0.5 % |
| Operating temperature (cement filled) | -55 °C to +200 °C |
| Operating temperature (silicone filled) | -55 °C to +150 °C |
| Body thickness | 10 mm |
| Body diameter | 4‑5.3 mm |
The resistors have a tolerance of ±0.5 % (with some variants up to ±5 %).
Cement‑filled resistors can operate from –55 °C up to +200 °C.
A 0.75 mm² lead wire is available for the IRN100 resistor.
They can tolerate a short‑time overload of ±(1.0 %+0.05 Ω) for 5 times the rating power for 5 seconds.