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 chassis-mount wirewound resistors with mounting holes

Unique-Bargains

Unique-Bargains 25W 4 Ohm Aluminium Housing Chassis Mount Wirewound Power Resistors Green 5pcs

SKU CH-5A6E-4EDGW

A pack of five chassis-mount wirewound resistors rated 25 W at 4 Ω with aluminium housings for heat dissipation

  • 25W power rating handles demanding circuits
  • 4 Ω ±5% tolerance ensures precise resistance
  • Aluminium chassis dissipates heat efficiently
  • Chassis-mount design with 3.5 mm holes simplifies installation
  • Pack of five supports multi-point deployments

25W Chassis-Mount Wirewound Resistors

This pack supplies five 4-ohm, 25-watt wirewound resistors with aluminium housings for chassis mounting. The green ceramic-alloy casings measure 27 by 16 by 15.5 mm and weigh 69 g in total. They are designed for high-power dissipation in industrial equipment, power supplies and audio systems. Buyers needing multiple identical loads for parallel or series networks will find the quantity convenient.

Verify Resistance, Power Rating and Mounting Holes

Confirm that your circuit requires exactly 4 ohms with a five-per-cent tolerance and can accommodate a 25-watt continuous rating. The mounting holes are 3.5 mm in diameter, so your chassis or cooling plate must provide matching clearance and screw threads. Total footprint including tabs is 53 by 27 mm, so check available board or panel space before ordering. Ensure the operating environment stays within the component's thermal limits without additional forced-air cooling.

Aluminium Housing Enables Direct Chassis Cooling

The aluminium body acts as a heat sink, allowing the resistor to transfer heat directly to a metal mounting surface or cooling plate. This construction supports operation in harsh environments with vibration and high ambient temperature. No extra thermal paste, insulating washers or specialised connectors are included in the pack. The standard screw-mount tabs provide multiple connection options for simple integration into existing assemblies.

Highlights

  • 25W power rating handles demanding circuits
  • 4 Ω ±5% tolerance ensures precise resistance
  • Aluminium chassis dissipates heat efficiently
  • Chassis-mount design with 3.5 mm holes simplifies installation
  • Pack of five supports multi-point deployments

Specifications

BrandUnique Bargains

Questions about this item

What comes in the package and is any mounting hardware included?

The pack contains five aluminium-housed 4 Ω 25 W wirewound resistors; mounting screws are not supplied.

All five resistors share the same 4 Ω 25 W rating — is there any reason to pick one over another?

Every unit is identical at 4 Ω ±5 % and 25 W, so any of the five can be used interchangeably.

Will a 25 W rating on a 53 × 27 × 15.5 mm body actually handle continuous load in a chassis?

Yes — the aluminium housing is designed for chassis mounting and heat-sink contact, allowing the resistor to dissipate its full 25 W when bolted to a metal surface.

Also in this aisle

People compared these

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