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A power supply is a device that supplies electrical energy to one or more electric loads. In most cases, the power supply controls the output voltage or current to a specific value. This specific value of output voltage or current is held nearly constant despite (small) variations in either the load or the supply.

From the design and construction point of view, power supplies for electronic devices can be broadly divided into linear and switching power supplies. A linear supply is usually a relatively simple design, but relatively bulky, heavy, and less efficient because of the large mains-frequency transformers and heat-sinked. A switched-mode supply of the same rating will be smaller, is usually more efficient, but will be more complex.
From application point of view, most ommercially available power supplies fall into the following categories:

  • Battery
  • DC power supply
  • Programmable power supply
  • Uninterruptible power supply
  • High-voltage power supply
  • Voltage multipliers

A well desgined power supply should include overload protection mechanism such as
  • Fuses
  • Circuit breakers
  • Thermal cutouts
  • Current limiting
 38 companies matched 
50Hz 60Hz Converter Inc
Frequency converter 60Hz to 50Hz, 110v 60Hz to 220v 50Hz converter, 230v 50Hz to 120v 60Hz frequency converter, AC power source, 480v 60Hz to 380v 50Hz Converter
9 To 5 Computer Supply Distrs
Power Supplies Conditioners
A & A Computers, Inc.
Power Supplies Conditioners
A2Z Computers, Inc.
Power Supplies Conditioners
AA Electric
Data Acquisition Signal Conditioning, Data Input Devices, Electrical Distribution Protection Equipment, Enclosure Accessories Services, Fans Electronic Cooling, Power Supplies Conditioners, Switches,...
AC Frequency Converter 50Hz 60Hz 400Hz
Solid state (static) frequency converter 50 Hert to 60 Hertz, 400 Hertz
AC Power Technology, Inc.
Batteries Accessories, Power Supplies Conditioners
Active Electrical Supply Company
Electrical Distribution Protection Equipment, Power Supplies Conditioners
Active Power, Inc.
Power Supplies Conditioners
American Appliance Repair Service
Appliance Repair Service, Washer & Dryer Repair Service, Refrigerator Repair Service, Microwave Oven Repair Service
American Power Conversion Corp. - APC
Batteries Accessories, Power Supplies Conditioners
Bosch (Xiamen) New Energy Co., Ltd.
Floating Solar PV
Cell-Con, Inc
Chroma ATE, Inc.
Power Supplies Conditioners, Machine Vision Equipment, Vacuum Equipment
Eaton Corporation - Powerware
Power Supplies Conditioners
Emerson Network Power - Embedded Power
AC-DC Power Supplies, DC-DC Converters
GC Electronics
Power Supplies Conditioners, Wires, Cables, Accessories, Industrial Assembly, Electrical, Optical, Specialty Materials
Georator Corp.
Power Supplies Conditioners
Golden Knitted Wire Mesh Factory
Our commitment to technology enables Golden Knitted Wire to provide our customers with first-class Knitted Wire Mesh Fabrics and Filters Parts in stainless steel, brass, copper, phosphor bronze and...
High Voltage Power Solutions, Inc.
Power Supplies Conditioners
Hitec Power Protection, Inc.
Power Supplies Conditioners
Intersil Corporation
Power Supplies Conditioners
Liebert Corporation/Emerson Network Power
Power Supplies Conditioners
Marshall E. Campbell Co.
Schneider Electric, Square-D. Bussman, Hoffman
PEACO Support Inc
Motors, Inverters, Generators, Vavles, transformers, voltage regulators, sensors, etc.
PowerContinuity Systems
Rahul Scientific Industries
manufacturer and exporter  of Scientific Instruments, Laboratory ,kitchen system Equipments ,Medical Instruments,electronic,glassware,balance & all type microscope.
Reign Power Co., Ltd
Business field:Switching Power Supply, Din Rail Power Supply, Lead Acid Battery Charger...etc industrial power supply.
Reynolds Industries, Inc.
Power Supplies Conditioners
Sensitron Semiconductor
Power Supplies Conditioners
Power Supplies Conditioners
Solid State Devices, Inc.
Power Supplies Conditioners
Storage Battery Systems, Inc.
Batteries Accessories, Power Supplies Conditioners, Density Specific Gravity Sensors, Product Material Testing
Transtector Systems, Inc.
Power Supplies Conditioners
VFD Manufacturers
The extra cost of the inverter duty motor and inverter are hard to recover for most refrigeration applications if the compressor has an internal unloading system such as a slide valve or cylinder...
Voltage Multipliers, Inc.
Power Supplies Conditioners
Waldom Electronics
Batteries Accessories, Power Supplies Conditioners, Electronics Microelectronics Manufacturing
Yoen Electronic Co., Ltd.