These devices are used for the primary function of any equipment. Like batteries supply DC power for operation in any battery operated equipment. Batteries are widely used as a source of direct-current electrical energy in automobiles, boats, aircraft, ships, portable electric/electronic equipment, and lighting equipment. Capacitors are widely used as reservoir of power charges and have wider applications in industrial RF induction heating process like dental, jewellery and for radio transmitters, plasma and RF generators, medical RF areas as MRI, cat scanners, RF surgery, and high power particle accelerators. Inductors are used in many electrical applications ranging electric vehicles, computer peripherals. Electromagnetic accessories and components like clutches, brakes, coils and vibrators have wide applications including industrial, chemical, construction, pharmaceutical, concrete, mining, textile, ceramics, petrochemical, steel, sand and gravel etc. Lighting equipment provided with capacious accessories for wide applications. Wire and cable accessories used to bundle, clip, clamp, label, guide, and protect. They are used for audio, camera or imaging, computer, military, medical, networking, telecommunications, video etc.

A wide range of electrical accessories and components is manufactured by host of manufacturers.