Unique-Bargains 25W 0.5 Ohm Aluminium Chassis Mount Wirewound Resistors Green 2pcs

25W 0.5 Ohm Wirewound Resistor Pair

These 25W 0.5 ohm wirewound resistors are built for circuits that need reliable power dissipation in a compact aluminium housing. They suit engineers and hobbyists working on power supplies, transducers, audio amplifiers or similar equipment where stable resistance under load is required. The 5% tolerance and non-inductive winding support consistent performance in demanding applications. Supplied as a pack of two.

Aluminium Housing with Chassis Mount

Each resistor measures 53 x 27 x 15.5 mm with a 27 x 16 x 15.5 mm body and a 3.5 mm mounting hole for screw fixation to a chassis or cooling plate. The green anodised aluminium, ceramic and alloy casing provides heat dissipation and high insulation while resisting vibration. Two units weigh 28 g total, making them easy to integrate into tight enclosures without adding bulk.

Power and Thermal Limits

Rated at 25W, these resistors depend on secure mounting to a metal surface to achieve full power handling; free-air operation will reduce the practical dissipation. The 0.5 ohm value with 5% tolerance sets a fixed current-to-voltage ratio, so they cannot replace adjustable or higher-precision components. The wirewound construction adds inductance that may affect very high-frequency circuits despite the non-inductive winding option.