VARIAC Variable Transformers

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Part	Manufacturer	Transformer Type	Mounting Feature	Manufacturer Series	Approvals (V)	Output Current-1	Dimensions	Maximum Operating Temperature	Minimum Operating Temperature	Maximum Output Voltage	Height	Width	Diameter	Nominal Input Voltage (V)	Minimum Input Voltage (V)	Length	Maximum Input Voltage (V)
221-B	Staco Systems	VARIAC	PANEL MOUNT	221-B		2.5 A	D74.68XH53.85 (mm)				53.85 mm		74.68 mm				120
MC28F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			28 A				270 V	160 mm	300 mm		240		300 mm
SQ1020	Staco Energy Products	VARIAC	CHASSIS MOUNT			3.5 A				240 V	105.5685 mm	107.95 mm		240		135.7122 mm
ESS103	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			3.15 A		45 Cel		250 V	84 mm	147 mm		230		159 mm
MCCMV6X-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			6 A					125 mm	165 mm				165 mm
ESS108	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			8 A		45 Cel		250 V	118 mm	185 mm		230		197 mm
MCCMV3E-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			3 A					160 mm	130 mm				160 mm
MCCMSE10	Spc Technology/ Multicomp	VARIAC				10 A											240
SQ1210	Staco Energy Products	VARIAC	CHASSIS MOUNT			12 A				120 V	105.5685 mm	107.95 mm		120		135.7122 mm
ESS110	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT		EAC	10 A		45 Cel		250 V	118.11 mm	184.912 mm		230		197.104 mm
MCCMV8E-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			8 A					170 mm	175 mm				175 mm
MCCMV4X-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			4 A					120 mm	165 mm				165 mm
ESS104	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			4 A		45 Cel		250 V	84 mm	147 mm		230		159 mm
MCCMV8X-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			8 A					140 mm	165 mm				165 mm
MC3F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			3 A				270 V	115 mm	110 mm		240		110 mm
ESS9008	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			.8 A		45 Cel		230 V	58 mm	94.5 mm		230		98 mm
MC20F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			20 A				270 V	145 mm	225 mm		240		225 mm
ESS102	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			2 A		45 Cel		250 V	84 mm	125 mm			230	137 mm
ESS303	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			3.15 A		45 Cel		260 V	84 mm	147 mm		230		159 mm
MC1F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			1 A				270 V	99 mm	83 mm		240		99 mm
MC2F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			2 A				270 V	95 mm	110 mm		240		110 mm
MCCMSE5	Spc Technology/ Multicomp	VARIAC				5 A											240
ESS106	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT		EAC	6.3 A		45 Cel		250 V	103.124 mm	147 mm		230		159 mm
MCCMV5E-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			5 A					170 mm	175 mm				175 mm
ESS118	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			18 A		45 Cel		250 V	121 mm	231 mm		230		243 mm
HSN260/4.5	Metrel Dd	VARIAC	CHASSIS MOUNT			4.5 A		40 Cel	-5 Cel	260 V	155 mm	170 mm		230		220 mm
ESS302	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT		EAC	1.8 A		45 Cel		260 V	84.074 mm	124.968 mm		230		136.906 mm
MC10F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			10 A				270 V	135 mm	175 mm		240		175 mm
MCCMV15E-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			15 A					190 mm	225 mm				225 mm
ESS318	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT		EAC	18 A		45 Cel		260 V	120.904 mm	230.886 mm		230		243.078 mm
MCCMCTV5	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			5 A					270 mm	200 mm				210 mm	240
MC6F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			6 A				270 V	110 mm	175 mm		240		175 mm
MCCMV2E-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			2 A					160 mm	130 mm				160 mm
CMSE3	Carroll & Meynell Transformers	VARIAC	CHASSIS MOUNT	CMSE3		3 A	L230.0XB140.0XH160.0 (mm)				160 mm	140 mm				230 mm	230
ESS9013	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			1.25 A		45 Cel		230 V	58 mm	94.5 mm		230		95 mm
MCCMV0.7E-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			.7 A					160 mm	130 mm				160 mm
ESS120	Block Transformatoren-elektronik	VARIAC	CHASSIS MOUNT			20 A		45 Cel		250 V	121 mm	231 mm		230		243 mm
SQ1010	Staco Energy Products	VARIAC	CHASSIS MOUNT			10 A				120 V	105.5685 mm	107.95 mm		120		135.7122 mm
MC15F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			15 A				270 V	135 mm	225 mm		240		225 mm
MCCMV1X-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			1 A					105 mm	86 mm				100 mm
MCCMV1.5X-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			1.5 A					127 mm	113 mm				130 mm
MCCMV28E-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			28 A					225 mm	300 mm				300 mm
MCCMV20E-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			20 A					190 mm	225 mm				225 mm
MC8F-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			10 A				270 V	130 mm	175 mm		240		175 mm
MCCMCTV10	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			10 A					270 mm	200 mm				210 mm	240
MCCMV2X-1	Spc Technology/ Multicomp	VARIAC	CHASSIS MOUNT			2 A					127 mm	113 mm				130 mm
CMV8X-1	Carroll & Meynell Transformers	VARIAC	CHASSIS MOUNT	CMV8X-1		8 A	L180.0XB166.0XH140.0 (mm)				140 mm	166 mm				180 mm	240
SQ1220	Staco Energy Products	VARIAC	CHASSIS MOUNT			5 A				240 V	105.5685 mm	107.95 mm		240		135.7122 mm

VARIAC variable transformers, also known as variable autotransformers, are a type of transformer used to vary the output voltage of an AC power source. They are commonly used in applications such as testing equipment, lighting control, and voltage regulation.

The basic principle of a VARIAC transformer is to use a movable brush or wiper to tap into a single winding, allowing the output voltage to be varied between the minimum and maximum levels. The VARIAC transformer is essentially an autotransformer, meaning that the primary and secondary windings are connected in series, and the output voltage is a function of the position of the wiper along the winding.

VARIAC transformers are designed to handle high currents and voltages, and have a low leakage inductance and low output distortion. They are typically used in applications that require precise and continuous voltage control, such as motor speed control, heat treatment, and lighting dimming.

VARIAC transformers are available in various sizes and configurations, ranging from a few hundred watts to several kilowatts. They are designed to operate at frequencies of 50 Hz or 60 Hz, and are available in single-phase or three-phase versions, depending on the application.

Proper selection and use of VARIAC transformers are critical to ensure safe and reliable operation. They are subject to various standards and regulations, such as UL (Underwriters Laboratories) and CE (Conformité Européenne), to ensure their safety and performance. VARIAC transformers should be operated within their rated voltage and current limits, and should be properly grounded and protected from overloading and short-circuiting.