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 tabs

Unique-Bargains

Unique-Bargains 25W 2.5 Ohm Aluminium Chassis Mount Wirewound Resistors Green 5pcs

SKU CH-4SB0-4X1VV

Five 25 W wirewound resistors rated at 2.5 Ω with aluminium chassis-mount housings for heat dissipation

  • 25 W power rating handles demanding circuits
  • Aluminium housing dissipates heat efficiently
  • Chassis-mount design with 3.5 mm holes secures installation
  • ±5 % tolerance on 2.5 Ω resistance ensures precision
  • Pack of five resistors supports multiple projects

Aluminium Chassis-Mount Wirewound Resistors

These 25 W aluminium-housed wirewound resistors are rated at 2.5 Ω with a ±5 % tolerance. The pack contains five new components intended for engineers, hobbyists and technicians who need reliable power dissipation in industrial or prototype circuits.

Critical Power and Resistance Rating

Each resistor handles 25 W continuous power at 2.5 Ω, so the circuit must not exceed this dissipation or the resistance value required. Buyers who need a different ohmic value, tighter tolerance or higher power rating should select another part.

Thermals, Noise and Power Draw

The aluminium housing measuring 27 × 16 × 15.5 mm with a 3.5 mm mounting hole is designed for chassis mounting against a cooling plate, allowing the 25 W rating to be met in normal operation. Wirewound construction produces no switching noise, and the component draws only the power dictated by the applied voltage across its 2.5 Ω resistance.

Highlights

  • 25 W power rating handles demanding circuits
  • Aluminium housing dissipates heat efficiently
  • Chassis-mount design with 3.5 mm holes secures installation
  • ±5 % tolerance on 2.5 Ω resistance ensures precision
  • Pack of five resistors supports multiple projects

Specifications

BrandUnique Bargains

Questions about this item

How much heat will a 25 W wirewound resistor put out inside my enclosure?

At full 25 W the aluminium chassis-mount body acts as a heatsink; bolt it to a metal panel or cooling plate so the 27 × 15.5 mm housing can shed the heat.

What does the 3.5 mm mounting hole accept for fixing?

The 3.5 mm hole takes an M3 or #4 machine screw; total length is 53 mm including tabs, body is 27 × 16 × 15.5 mm.

How much board space does each 2.5 Ω unit need?

Each green resistor measures 27 mm wide by 15.5 mm high; allow 53 mm overall length for the mounting tabs and 68 g per piece.

Also in this aisle

People compared these

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