OHMITE 89 Aluminum Housed Wirewound Resistors
OHMITE 89 Aluminum Housed Wirewound Resistors are designed for reliable operation in demanding environments. These molded construction resistors offer a high power to size ratio, exceptional stability, and resistance to vibration and mechanical shock. The 89 aluminum resistors have a maximum operating temperature of +275°C and a maximum power rating of 50W. These components have tolerances of ±1% and ±5% and a dielectric withstanding voltage of 1000VAC (5W, 10W) and 2250VAC (25W, 50W). Typical applications include power conversion systems, defense electronics, and transportation systems.
Features
- Aluminum housing
- Chassis mountable
- Heat sink capable
- High power density
- High stability
- RoHS compliant
Applications
- Aerospace and defense electronics
- Industrial automation equipment
- Motor drives and controls
- Power conversion systems
- Power distribution equipment
- Railway and transportation systems
- Test and measurement equipment
- UPS and power supply systems
Technical Specifications
| Parameters | Values | |
|---|---|---|
| Maximum Operating Temperature | +275°C | |
| Dielectric Withstanding Voltage | 1000Vac (5W, 10W) and 2250Vac (25W, 50W) | |
| Tolerance | ±1% and ±5% | |
| Maximum Power Rating | 50W | |
| Temperature coefficient | Under 1Ω | ±90 ppm/°C |
| 1 to 9.99Ω | ±50 ppm/°C | |
| 10Ω and over | ±20 ppm/°C | |
