| Advanced Protection Technologies: Manufactures surge suppressors for the home and industry. |
| Airpax: Thermal protection, electronic packaging and power protection products. |
| Airpax Power Protection Products: Designs and manufactures magnetic circuit breakers and related products for telecommunications, industrial, power conditioning, HVAC, and information processing applications. |
| Arc Fault detection: Information site about Arcfault detection systems, the site providing information on the causes and prevention thereof. |
| Arc flash calculator, short circuit analysis.: Power distribution system balanced symmetrical and unbalanced short circuit analysis needed for arc flash protection boundary, incident energy calculation, selection of electrical equipment, circuit protection devices. Bolted 3-phase, line to earth, double phase to ground, phase to phase, single phase open faults through zero and above zero impedance can be resolved. |
| Bender Inc.: Industrial protection for measuring voltage, current, phase loss, phase reversal, frequency and other conditions in AC and DC systems up to 690V. |
| Bill Switchgear: Manufactures circuit breakers, circuit protection and control. |
| BONEGA Velkoobchod spol. s.r.o.: Development, production and distribution of electrical installation devices, miniature circuit breakers, residual current devices, and switches. |
| Circuit Breaker Industries Ltd - CBI: Manufacturer of miniature and moulded case circuit breakers for overload and short circuit protection. From South Africa. |
| Controlab Inc.: Canadian manufacturer of phase failure and ground fault monitors. |
| Cutler-Hammer, Inc: Manufacturer of circuit breakers, conductors, interrupters, surge protectors and breaker boxes. |
| Den Mar Industrial Fuses: Transformer, semiconductor, cable limiter and japanese fuses. |
| Dianxing Electrical Appliance Industry Co., Ltd.: AC voltage regulator manufacturer and exporter in China that supplies AC voltage regulators. |
| EFEN Engineers: Manufacturer of electrical, power and industrial fuses. |
| EL-CO: Manufacturer of ceramic fuses, holders, household ceramic based sockets, plugs and connectors. |
| Electrical Designer's Reference: Fault current calculator, motor circuit design and protection. |
| Electromotor Protection Co.,Ltd: Manufacturing electric protection unit control, for circuit, transformer and electromotor protection, electric transducer and bus monitor control. |
| Erik Larsen Pty Ltd: Cirlock for circuit breakers and Fuselock for fuse holders are a great safety lockout systems. |
| Ferraz Shawmut, Inc.: Develops and manufactures fuses, blocks and switches. Product specifications, news, and details of employment opportunities. |
| Fuse Holders Corp: Manufacturer of various fuse holders and clips. |
| FuseOne: Sells fuses for electric circuit protection from overstock and surplus supplies. |
| Fusetek: Canadian fuse manufacturer. |
| Gamma Fuses: Distributor based in Florida USA, Gamma is a specialist fuse supplier of industrial fuses, and accessories. |
| Hepol Electric Enterprise: Manufacturer of circuit breakers, concators, fuses, relays, distribution boards and sockets plugs. from China. |
| Hi-Tech Fuses, Inc.: Manufacturer of high-voltage current-limiting fuses, including backup and full-range types, for protecting electrical distribution equipment. |
| Hinode Electric co., Ltd.: Manufacturer of semiconductor fuses. |
| Horstmann Gmbh: Manufacture of faulted circuit indicators, earth fault indicators, voltage detectors and phase comparators. |
| Inter-Cel: Manufacturer of thermal circuit breakers, thermal switches, bimetal thermostats, high temperature regulators, thermal protectors. |
| Jaker Electric Co., Ltd.: Manufacturer of load break switch, power fuse mounting base. From Taiwan. |
| Jensen Devices AB: Manufacturer of gas discharge tubes. |
| Kusum Engineering Works: Manufacturer based in India, of circuit breakers, switchgear, fusegear, and motor control gear. |
| Lexor Electronic Laboratories Ltd.: Delay line and filter network manufacturers. |
| LG Industrial Systems: Korean manufacturer of circuit breakers. |
| Littelfuse Circuit Protection: Manufacturing and designing circuit protection including fuses, PTC and circuit breakers for automotive, electrical and electronic applications. |
| Loresco International: Manufacturer of carbon backfill and related products for the cathodic protection and electrical grounding industries. |
| Luhfser: Expulsion fuse links protect high voltage transformers against fault currents, reduce loss during energy transmission. From Colombia. |
| MD Semiconductor, Inc.: High current surge, transient voltage suppression device manufacturer. |
| Mechanical Products Co.: Manufacturer of circuit breakers. |
| MEM Low Voltage Products: Manufacturers of circuit breakers, switchgear, fusegear, low voltage switchboards, capacitors, TVSS and motor control gear. |
| Merlin Gerin: The electrical distribution information website for Merlin Gerin brand of Schneider Electric. |
| Miami Breaker, Inc.: Manufactures replacement circuit breakers and automatic and manual transfer switches and is a distributor of motor controls, remanufactured breakers, GFI receptacles and electronic ballasts. From Florida, USA. |
| National Fuse Products: US supplier of domestic and foreign fuses, blocks, switches, and OEM/MRO accessories. |
| Ningbo Final Best Co., LTD: China manufacturer and distributor of fuses, fuse holders,switches and rocker switches |
| Ningbo Switchgear Electric Co.,Ltd: Manufacture of low voltage fuses, switch-fuse combination, thermal over-load relays and a complete set of switch equipment. |
| Orion Italia: Manufacturer of electrical measure and protection relays. |
| Poco Sales Inc.: US distributor of circuit breakers by Airpax, CBI, Eaton, ETA, Carlingswitch, Heinemann, Schurter. Featuring circuit breaker specifications, engineering drawings and design guides. |
| Portex.: Manufacturers and exporters of thermal and current controls of electrical equipment. |
| Precision Controls Company: Manufacturer of circuit breakers, motor protectors and thermal discs. |
| Rebeck Enterprise Co., Ltd.: Manufacturer of motor, circuit breaker, contactor, transformer, electrical/ HVAC components, relay, motor starter. |
| Reuter Hanney, Inc.: Provider of electrical testing, power quality studies, system design and coordination services to commercial, industrial and institutional facilities throughout the mid-Atlantic region. |
| Rowe Hankins Components Ltd: Distributor of circuit protection devices, switches,hydraulic,magnetic circuit breakers, switchgear, traction components and measuring systems. |
| Safe Line S.L.: Manufactures protection devices for overvoltage, low voltage, surge arrester and lightning. From Spain. |
| Safety Design, Inc.: US supplier of a lockout system that can be retrofitted to any electrical panel or circuit breaker. |
| Sankosha USA: Manufacturer of gas tube surge arresters and gas discharge tubes for over voltage surge protection from lightning and other transient voltages. |
| Schurter, Inc.: Manufacturer of circuit protection devices including fuses, holders, circuit breakers for equipment, connectors, power entry modules, cordsets and switches. |
| Shenzhen Ampron Sensitive Components Co., Ltd.: Manufacturer of PTC thermistor. From China. |
| Sleek Co., LTD: Manufacturer of fuses, micro fuses and resetable fuses. |
| Sri Venkateswara Precision Components: Manufacturer of the final pole assemblies, cluster assemblies, isolating contacts and mechanism assemblies of breakers. |
| Stanley Switch Gear Products: Manufacturing switchgears for industrial, heavy industries and for agricultural pumps. |
| Taiwan Switch Co., Ltd.: Switch manufacturer; producing molded case circuit breakers, earth leakage circuit breakers, magnetic starters, fuses, control switches and sensitive devices. |
| Tyco Electronics: Raychem Division: Manufacturer of overcurrent resettable devices, thyristor surge protectors, protected power switches and magnetics products. |
| Vimar Spa: Manufacturer from Italy of Circuit Breakers, RCBOs,interlocked socket-outlets, fuses, fuse holders and transient voltage suppressors. |
| Wickmann: Manufacturer of miniature, subminiature, surface mount (SMT) and automotive fuses, protectors and circuit protection components. |
| Wujin Zhenhui Electronic Co.,Ltd.: Manufacturer based in China supplying fuses, fuse holders, automotive fuses and thermal fuses. |
| Yueh Jyh Metal Industrial Co., Ltd.: Manufacturer based in Taiwan of fuses, circuit breakers, fuse holders and fuse blocks. |
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