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Gold aluminium chassis-mount wirewound resistor, rectangular finned body with mounting tab and two axial leads

Unique-Bargains

Unique-Bargains 25W 30 Ohm Aluminium Chassis Mount Wirewound Resistor Gold

SKU CH-1FDH-8MGZW

A 30 Ω wirewound power resistor rated at 25 W in a gold aluminium chassis-mount housing for heat dissipation

  • Key featuresCool plate Chassis Mount Aluminum Housing resistor;high powe
  • 25 W power rating handles demanding circuits
  • 30 Ω ±5 % tolerance ensures precise resistance
  • Aluminium chassis mount dissipates heat efficiently
  • 5 mm mounting hole simplifies secure installation
  • Compact 28 × 16 × 15.5 mm body fits tight spaces

25 W 30 Ω Wirewound Resistor

This aluminium-housed wirewound resistor is rated at 25 W and 30 Ω with a ±5 % tolerance. It is intended for engineers and technicians who need a chassis-mounted power resistor for industrial or repair work such as doorbell circuits, power supplies or audio equipment.

Chassis mount limits heat dissipation

The component must be screwed to a metal plate or enclosure to shed its 25 W rating; the aluminium body measures 28 × 16 × 15.5 mm and the total footprint including mounting tabs is 53 × 28 × 15.5 mm. Without adequate thermal contact the resistor will exceed its safe operating temperature.

Verify mounting hole and clearance

Check that your chassis provides a 3.5 mm mounting hole and at least 53 mm length by 28 mm width for the full outline. The unit weighs 15 g and uses ceramic and alloy internals, so ensure the mechanical layout and vibration environment match these physical constraints.

How it compares

Measured against everything we stock in Passive Components & Solder Supplies, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 90% of the 265 comparable items (median $9.99).

Specifications

Product
Brand nameUnique Bargains

Questions about this item

How do I decide which power rating to choose for my circuit?

This resistor is rated at 25W. Select it only when your design calls for a 25W wirewound component; lower or higher power ratings would require a different part.

What does the 30 ohm value mean once the resistor is installed?

The 30 ohm resistance with ±5% tolerance sets the current-to-voltage ratio in your circuit. At 25W the body reaches its thermal limit, so the aluminium housing must be mounted to a cooling plate.

What mounting interface does this part use and what does it limit?

It uses a chassis-mount interface with a 3.5mm mounting hole. The single screw fixing limits mechanical vibration resistance and thermal transfer to the surface it is bolted onto.

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