Unique-Bargains 25 Ohm 50W Aluminum Wirewound Resistor Gold Tone

25 Ohm 50 W Aluminium Wirewound Resistor

This 25 ohm wirewound resistor handles a continuous 50 watt power rating with a ± 5 % tolerance. The aluminium housing includes screw tabs for secure chassis or heatsink mounting. It suits audio crossover networks, speaker protection circuits and general test-bench loading where a stable, non-inductive load is required. Builders needing higher power dissipation or different resistance values should select another component.

Sustained 50 W Load Behaviour

The element is rated for 50 W continuous dissipation when the case is firmly bolted to a suitable heatsink using the 1.8 mm mount holes. Without adequate metal-to-metal contact the internal temperature will rise quickly and the resistance value may drift outside the stated tolerance. The wirewound construction maintains a stable ohmic value across the operating temperature range, avoiding the thermal runaway seen in some film types. Applications demanding pulsed peaks well above 50 W are not served by this part.

Thermals, Noise and Power Draw

The aluminium case measures 7.3 x 2.2 x 1.5 cm and weighs 24 g, providing a conductive path to the mounting surface. Silent operation is inherent because there are no moving parts or active cooling. Surface temperature under full rated load will depend entirely on the external heatsink capacity and ambient airflow; the resistor itself adds no acoustic noise. The gold-tone anodised finish resists oxidation without affecting thermal transfer.