We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Five green aluminium-cased wirewound resistors with mounting tabs

Unique-Bargains

Unique-Bargains 25W 4.5 Ohm Aluminium Chassis Mount Wirewound Resistors Green 5pcs

SKU CH-X6Z9-J0N19

Five chassis-mount wirewound resistors rated 25 W at 4.5 Ω with ±5 % tolerance in aluminium housings for heat dissipation

  • 25W power rating handles high-load circuits
  • 5 Ω ±5 % tolerance gives precise resistance
  • Aluminium chassis mount dissipates heat efficiently
  • 5 resistors per pack covers multiple builds
  • Compact 27 × 16 × 15.5 mm body fits tight spaces

25W 4.5 Ohm Aluminium Chassis Resistors

This pack contains five aluminium-housed wirewound resistors rated at 4.5 ohms with a 5 percent tolerance. Each unit dissipates up to 25 watts when mounted to a chassis or cooling plate. The green anodised aluminium body measures 27 by 16 by 15.5 millimetres with a total length of 53 millimetres including the mounting tabs. A 3.5 millimetre mounting hole accepts standard screws for secure fixing. The pack weighs 68 grams total.

Suits power supply, transducer

Designers needing a 4.5 ohm 25 watt load for power supplies, doorbell circuits, elevator controls or arena audio systems can use these directly. The wirewound construction handles vibration and harsh environments. Buyers who require a different resistance value, a higher or lower power rating, surface-mount packaging or non-inductive winding should select another component.

4.5 ohm 25 watt rating decides fit

The single specification that determines whether this is the correct part is the 4.5 ohm resistance combined with the 25 watt power rating. If your circuit calls for exactly 4.5 ohms at 25 watts in a chassis-mount aluminium package, these five resistors match the requirement. Any other resistance or power need means this pack will not work.

Highlights

  • 25W power rating handles high-load circuits
  • 5 Ω ±5 % tolerance gives precise resistance
  • Aluminium chassis mount dissipates heat efficiently
  • 5 resistors per pack covers multiple builds
  • Compact 27 × 16 × 15.5 mm body fits tight spaces

Specifications

BrandUnique Bargains

Questions about this item

How much heat will a 25 W resistor dump into my chassis?

Each unit is rated to dissipate 25 watts continuously when bolted to a metal surface, so the aluminium housing will transfer that heat directly into the mounting plate.

What does the 3.5 mm mounting-hole spec mean for my panel layout?

The resistor body has a single 3.5 mm clearance hole; use M3 hardware and leave 53 mm overall length for the terminals and flange.

Will the 27 mm body width fit between my existing board standoffs?

The aluminium case measures 27 mm wide and 15.5 mm tall, so check that your standoff spacing and enclosure height clear those dimensions.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.