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Company Profile

Company History

1948 June Established YAMADA Electric Manufactory. Started production and sale of pressure switches and float switches.
1952 Nov Changed organization to YAMADA Electric Manufactory Ltd. Capital: 350,000 yen.
1953 Apr Started production and sale of burnout protectors for small single-phase motors and thermostats.
1957 May Started production and sale of floatless liquid level control relays.
1958 Aug Changed organization to YAMADA Electric Mfg. Co., Ltd. Moved headquarters due to business expansion.
Increased capital to 5 million yen.
1964 Feb Built Inuyama Plant and moved some assembly lines and press sections to the plant.
Apr Started production and sale of burnout protectors for small three-phase motors.
Oct Rebuilt the entire headquarters plant. Increased capital to 30 million yen.
1965 June Developed electric motor protector.
Oct Started production and sale of push-button switches.
1966 Dec Increased capital to 50 million yen.
1967 Apr Started production and sale of thermal overload motor protectors.
1969 Feb Completed the second enlargement of the headquarters plant.
Apr Moved Inuyama Plant to the current location (Sakurakaido).
1972 Jan Built a separate building at headquarters plant. Started production and sale of control panels.
1973 June Extended Inuyama Plant. Established the injection molding department.
1976 Aug Established mass production system for Centrifugal Motor Starting Switches (developed in 1970). Increased capital to 80 million yen.
Dec Increased capital to 100 million yen.
1978 Jan Developed world’s first large capacity (22kw) thermal overload motor protector.
Aug Started full-scale production and sale of low temperature thermostats.
1979 June Developed PTC starting relay combined with thermal overload motor protector.
Developed water suspension relay.
1982 Feb Developed pressure switch for air compressors.
June Provided technical assistance including the exportation of production equipment of thermal overload motor protectors to S.U.E. in Thailand.
1983 Apr Developed thermal overload motor protector for automotive compact DC motors.
Oct Developed PTC adapted delay relay.
1984 Apr Developed vacuum switch.
Aug Developed self-holding type overheat protector.
1985 June Developed lead switch type pressure sensor.
1986 June Developed photo electronics pressure sensor.
1987 Sept Developed CP type small electric current protector.
1988 Dec Developed thermal overload motor protector for temperature rise detection multi-functional air conditioners.
1989 June Enlarged Inuyama Plant due to the extension of the production line for thermal overload motor protectors.
July Developed microcomputer applied system control unit.
Sept Developed fail safe multi-functional thermal overload motor protector.
1990 Nov Developed combination sensor for pumps. Established YAMADA ELECTRIC MFG. (MALAYSIA) SDN. BHD. as an overseas base.
1991 Aug Provided technical assistance including the exportation of production equipment for thermal overload motor protectors to Republic of Belarus (former Soviet Union).
Dec Developed microcomputer pump control unit.
1992 June Developed new rotary switch for air conditioners. Provided technical assistance including the exportation of production equipment of thermal overload motor protectors to Republic of Russia.
1993 Feb Built the new headquarters building in the current location.
March Developed electronic starting relay.
May Developed reversible governor switch.
Dec Developed bubble type water level control device.
1994 June Developed voltage drop detecting relay.
Sept Officially commended by the Minister of Labor for our active employment of people with disabilities.
1995 March YAMADA MALAYSIA plant was selected to be inspected by The Chubu Bureau of International Trade and Industry Overseas Project Mission, and was highly evaluated.
Apr Developed pressure sensor for inverter pump.
1996 Jan Won the Medium and Small Business Research Institute Award.
March Developed start/ normal control integrated pressure switch.
Apr Received the Science and Technology Director Award for developing failsafe multi-functional thermal overload motor protector. Developed humidity resistant type pressure sensor.
Dec Developed overcurrent relay for package air conditioners.
1997 March Developed bubble type water level monitoring device.
July Developed new thermal overload protector for multi-functional air conditioner detecting temperature rise and CFC gas leakage.
Developed electromagnetic flowmeter.
Oct Developed linear output type pressure sensor with semiconductor device.
Dec Developed new thermostat for inverter compressor.
Developed new two-stage thermal protector.
1998 Feb Developed hysteresis switch for air compressor.
Apr Developed pressure switch for handy compressor.
Developed plug in type thermal protector.
1999 Oct Developed pressure switch for press machine.
2000 Apr Developed protect equipment for air pump.
Dec Developed immersion type water level monitor.
Developed bubble digital water level monitor.
Developed submersible pump flood detection equipment.
2001 Jan Established YAMADA ELECTRIC MFG. (WUXI) CO., LTD. in Wuxi, China.
2002 Feb Developed new rotary switch for air conditioner.
Aug Developed pressure sensor for warm water.
2003 Jan Developed integrating flowmeter for water purifier.
March Developed indoor drainage pump unit.
Oct Developed original point sensor for printer.
2004 Aug Developed household pump controller.
Dec Developed immersion type water level monitor.
2005 May Developed accumulator for pump.
2006 March Developed high flow fine sensor.
Apr Developed flow switch for pump for export.
Oct Developed frost prevention irrigation controller.
2007 Nov Developed energy saving starter relay for refrigerator.
2008 Feb Developed circuit board for fire hydrant pump.
June Developed variable thermo for control panel.
July Developed DCBL controller for auxiliary water supply booster pump.
Developed accumulator for auxiliary water supply booster pump.
Developed fine sensor for auxiliary water supply booster pump.
Developed circuit board for booster pump.
2009 Feb Developed thermostat for inverter compressor.
Apr Developed starter switch for submersible pump.
Developed high-sensitivity thermal protector.
2010 Jan Developed circuit board for drainage pump.
2011 March Developed alarm board for pump.
2012 March Developed DCBL motor driver circuit board for pump.
2013 Jan Developed new products related to PTC heater.
Feb Developed pressure switch for export.

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