RESISTORS

Introduced: September 1968

Description

Resistors and resistive elements used in electrical circuits and electronic devices. This subclass covers fixed and variable resistors, thermistors, varistors, and resistive films or coatings, including their construction, materials (such as carbon, wire-wound, or metal film), and manufacturing processes. Related technologies include resistor networks, resistor arrays, and hybrid resistive assemblies integrated with other components. Adjacent classes cover resistor applications within specific circuit configurations (H01L for semiconductors) and resistive heating elements designed primarily for thermal rather than electrical control purposes.

IPC and CPC are identically structured here. All 8 subcodes exist in both systems.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

H01C 1/00 Details IPC+CPC Available in IPC and CPC
H01C 10/00 Adjustable resistors since 1974 +1 CPC IPC+CPC Available in IPC and CPC
H01C 11/00 Non-adjustable liquid resistors IPC+CPC Available in IPC and CPC
H01C 13/00 Resistors not provided for elsewhere IPC+CPC Available in IPC and CPC
H01C 17/00 Apparatus or processes specially adapted for manufacturing resistors (providing fillings for housings or enclosures H01C1/02; reducing insulation surrounding a resistor to powder H01C1/03; manufacture of thermally variable resistors H01C7/02, H01C7/04) +2 CPC IPC+CPC Available in IPC and CPC
H01C 3/00 Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids +1 CPC IPC+CPC Available in IPC and CPC
H01C 7/00 Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material (consisting of loose powdered or granular material H01C8/00; resistors having potential barriers, e.g. field-effect resistors, H10D1/40 - H10D1/43, H10K10/10; semiconductor devices sensitive to electromagnetic or corpuscular radiation, e.g. photoresistors, H10F30/00; magnetic field controlled resistors H10N50/10; bulk negative resistance effect devices H10N80/00) +4 CPC IPC+CPC Available in IPC and CPC
H01C 8/00 Non-adjustable resistors consisting of loose powdered or granular conducting, or powdered or granular semi-conducting material since 1974 IPC+CPC Available in IPC and CPC