Power Resistor 30W 8.2Ω

Power Resistor 30W 8.2Ω

The 30 W, 8.2 Ω cement-type power resistor is built around a high-alumina ceramic core and enclosed in a robust cement-coated ceramic case. The resistive element is available as either metal-oxide film or resistance wire, embedded and sealed with silicon resin (silicon cement) to provide mechanical protection and improved heat transfer. Termination is achieved with tinned iron end caps and welded, solderable leads, forming a compact, serviceable package suited for through-hole mounting or wired connections in power circuits.

Rated at 30 W, this resistor’s rated voltage equals √(P×R), which for 30 W × 8.2 Ω is approximately 15.68 V. It is designed for continuous operation at the rated ambient for its class, with a derating curve applied when ambient temperature exceeds the rated point. The part tolerates short-time overloads and pulsed stress within the limits defined by the spec (short-time overload, pulse overload cycles, and specified maximum pulse voltages), giving stable resistance under transient and steady-state thermal loading.

Engineered to meet standard JIS-based reliability tests, the resistor passes solderability and solder-heat resistance checks, dielectric and insulation tests, temperature cycling, humidity load-life, and extended load-life endurance at elevated temperature. Its silicon-cement sealing and ceramic case reduce moisture ingress and mechanical stress, minimizing long-term resistance drift and ensuring predictable performance in demanding industrial and power applications.

Features:

• Cement-coated ceramic housing with high-alumina core.
• Metal-oxide film or resistance-wire element options.
• Silicon cement sealing (UL-94V-0 non-flammable).
• Welded tinned iron end caps with solderable leads.
• Continuous 30 W rating with a manufacturer derating curve for higher ambient temperatures.
• Designed to meet JIS C 5202 reliability and environmental tests.

Specifications:

Pinout Diagram:

Footprint Diagram:

Applications:

• Power Supply Inrush Current Limiting.
• LED Driver Current Regulation.
• Audio Amplifier Load Dummy Load.
• Voltage Divider for High Power Circuits.
• Snubber Network for Surge Suppression.
• Motor Control Dynamic Braking.
• Heat Generation in Temperature Controlled Systems.
• Test Equipment as a Calibration Load.
• Bleeder Resistor for Capacitor Discharge.
• Power Dissipation in Voltage Reference Circuits.

Package Contents:

• 1x Power Resistor 30W 8.2Ω

Datasheet