Ballasts (390 companies)
Ballasts are electrical devices that condition the line voltage (amplitude, amperage and waveform) to operate fluorescent and HID lamps. Basically they serve two functions: to provide the starting kick, and to limit the current to the proper value for a particular lamp.
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DC Power Supplies (1035 companies)
DC power supplies accept an input power and output the desired form of DC power. Common types of DC power supplies include linear power supplies, switching power supplies, DC-DC converters, and silicon controlled rectifier (SCR) type power supplies.
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DC-AC Inverters (383 companies)
DC to AC inverters are used for converting direct current (DC) into alternating current (AC). They are also known as DC to AC converters.
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Power Distribution Units (PDU) (287 companies)
Power distribution units (PDUs) have an electrical input and several outputs, often as electrical outlets, for powering multiple devices. 
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Power Frequency Converters (79 companies)
Power frequency converters take electrical input power at one frequency and voltage and provide electrical output power at a different frequency and at a different or equal voltage.
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Power Rectifiers (232 companies)
Power rectifiers are electrical devices that convert alternating current (AC) to direct current (DC). They are an integral part of telecom rectifiers for the telecommunications industry, and in battery chargers, DC power systems, and other power system devices.
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Power Supplies (2173 companies)
Power supplies are devices that produce AC or DC power.  This grouping includes current sources, DC power supplies, AC-DC adapters, DC-DC converters, AC power sources, and DC-AC inverters.
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Programmable Power Supplies (82 companies)
Programmable power supplies are digitally controlled power sources that provide accurate and adjustable levels of voltage, current, and frequency. They include a processor, voltage/current programming circuits, current shunt, and voltage/current read-back circuits.
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SCR Power Supplies (27 companies)
SCR power supplies use silicon controlled rectifier (SCR) topology to provide well-regulated voltage and current output. Learn more about SCR Power Supplies

Single Phase Uninterruptible Power Supplies (UPS) (587 companies)
Single phase uninterruptible power supplies (UPS) sit between an AC outlet and an electronic device to provide power conditioning, back-up protection, and distribution for electronic equipment loads. They also prevent power disturbances from affecting the performance and life of the electronic device and vital data. 
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Three Phase Uninterruptible Power Supplies (UPS) (326 companies)
Three phase uninterruptible power supplies (UPS) operate in conjunction with existing electrical systems to provide power conditioning, back-up protection, and distribution for electronic equipment loads that use three-phase power. 
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Uninterruptible Power Supplies (UPS) (643 companies)
Uninterruptible power supplies (UPS) are backup batteries that provide emergency power to electrical systems in case power becomes unavailable. They are connected between a power source (such as an electrical outlet) and the equipment to protect (such as a motor or computer).
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