RTO 50 is a high power resistor developed by Vishay Sfernice. It is packaged in a TO 220 package and can dissipate 50W of power. The product has a high power density and good overload capability.
The RTO 50 is a 50 W thick‑film power resistor offered by Vishay Sfernice in a TO‑220 package. It features sand‑trimmed resistance adjustment, high power‑to‑size ratio, non‑inductive construction, and RoHS compliance. The device can be supplied with radial leads or as a surface‑mount version and is designed for heatsink mounting.
The datasheet provides mechanical, environmental, and electrical specifications, including temperature range, thermal resistance, voltage limits, and tolerance options. Performance charts detail overload capability, thermal calculations, and recommended heatsink selection. Ordering information and part number coding are also included.
| Power rating | 50 W at 25 °C |
|---|---|
| Thermal resistance (RθJC) | 2.6 °C/W |
| Temperature range | -55 °C to +155 °C |
| Resistance range | 0.010 Ω to 550 kΩ (E24 series) |
| Limiting element voltage | 300 V |
| Dielectric strength | 2000 V rms for 1 min |
| Insulation resistance | >10^8 MΩ |
| Inductance | <0.1 µH |
| Critical resistance | 1.8 kΩ |
The RTO 50 can dissipate up to 50 W at an ambient temperature of 25 °C.
It operates from –55 °C up to +155 °C.
Yes, the device is compliant with the RoHS directive 2002/95/EC.
The limiting element voltage is 300 V.