The U.S. aircraft register, updated daily
Parts

Cb

No failure report names the cb. 6 FAA approvals let 3 companies make a replacement cb, Thales Avionics INC holding the most (4).

Approved replacement parts 6 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a cb and sell it as an approved part for the models named. These are the companies holding such approvals for a cb:

For these models most: Airbus A320 (3), Airbus A321 (2), Textron Aviation Inc 700 (1).

MakerPartReplacesFitsGrantedStatus
Db Integrations, LLCCB Assembly 756-0284-500-4Modification ArticleTextron Aviation Inc. 7002024-02-01current
Thales Avionics INCCB, RELAY, SWITCH AND MODULE INSTALLATION 320N3302-101Modification PartAirbus A320-2322018-08-03current
Thales Avionics INCCB, Relay and Module Installation Kit 320S3601-101ModificationAirbus A320-111, -211, -2122018-04-26current
Thales AvionicsCB, RELAY, SWITCH AND MODULE INSTALLATION 320N3302-101Modification PartAirbus A320-2322018-04-25current
Thales Avionics INCCB, Relay, Switch and Module Install, LD 321M3302-103Modification PartAirbus A321-200 Series2018-04-07current
Thales Avionics INCCB, Relay, Switch and Module Install, HD 321M3302-101Modification PartAirbus A321-200 Series2018-04-07current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.