• 300W power capacity with a compact and low-profile design.
• Non-inductive and lightweight construction.
• High stability and reliability.
• Wide resistance range with up to 5KV insulation voltage.
• Virtually vibration-proof.
• Operating temperature range from -55°C to +175°C.
• RoHS compliance as standard.

• Military burn-in/screening and various design modifications available.
• Customizable features such as flexible leads, custom values, markings, and lead/Pb terminations.

Suitable for use with air- or water-cooled heat sinks. The CM300's proprietary flame retardant epoxy insulation provides optimal environmental protection and dielectric strength. Ideal for applications in inverters, power supplies, laser systems, DC-DC converters, X-ray/radio frequency generators, medical equipment, snubber circuits, bypass and coupling circuits, and other high voltage or high power applications.

• Power Rating: 300W at flange temperature <= +25°C.
• Resistance Range and Tolerance: 0.1Ω to 1MΩ; standard tolerances of 2%, 5%, and 10%.
• Temperature Coefficient: ±100ppm from +25°C to +125°C, except optional L in low values.
• Operating Temperature Range: -55°C to +175°C, measured at flange surface.
• Max Working Voltage: 1000V (up to 2000V available).
• Dielectric Strength: 2KVAC (up to 5KV available) for 60 seconds between terminal and flange.
• Load Life Stability: ±1% over continuous power for 1000 hours.
• Moisture Resistance: ±1% at 60°C, 90-95% RH for 1000 hours.
• Insulation Resistance: >1000 Megohms between terminals and flange.
• Derating: 300W at 25°C to 0W at 175°C, derate linearly.
• Thermal Impedance: 0.23W/°C from resistor to flange.

CM300 L - 104 - J W (Type, Optional Insulation Leads, Resistance Code, Tolerance, Termination)