Switch Mode Transformers Specifications

Performance Specifications


	Operating Frequency Range		The frequency range for which transformers meet all guaranteed specifications.
	Search Logic:		User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.

	Input Voltage		The input voltage range of the transformer.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Output Voltage		The output voltage range of the transformer.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Power Rating		The output power range that the transformer can produce.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	DCR		Direct current resistance (DCR) is the resistance of the transformer winding measured using DC current. The DCR is most often minimized in the design of a transformer and specified as a maximum rating.
	Search Logic:		All matching products will have a value less than or equal to the specified value.

	Isolation / Hipot Level		Isolation or hipot (high potential) level is the maximum voltage that can be applied to the transformer without breaking the winding of the transformer or the dielectric.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Duty Cycle		The duty cycle is the ratio between the on and off time of the output voltage of the transformer. It measures efficiency.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Operating Temperature		Full required range of ambient operating temperature.
	Search Logic:		User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.

	Number of Outputs
	Your choices are...
	1		The transformer has only one output
	2		The transformer has two outputs.
	3		The transformer has three outputs.
	More than 3		The transformer has more than three outputs.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Package / Standards


	Core Type
	Your choices are...
	EE		Devices have a standard E-shaped core with a bobbin structure.
	EER		Devices have a standard E-shaped core with a bobbin structure.
	EFD		Devices have a standard E-shaped core with a bobbin structure.
	ET		Devices have a standard E-shaped core with a bobbin structure.
	EP		Devices have a standard E-shaped core with a bobbin structure.
	EPS		Devices have a standard E-shaped core with a bobbin structure.
	ETD		Devices have a standard E-shaped core with a bobbin structure.
	PQ		The PQ core is a standard core designed for high heat dissipation due to its large core surface area.
	RM		The RM core is a standard ferrite core for transformers and inductors.
	Other		Other unlisted or proprietary core types.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Standards / Compliance
	Your choices are...
	RoHS Compliant		Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polybrominated diphenyl ether. RoHS will become effective on July 1, 2006.
	ANSI		The American National Standards Institute (ANSI) is the administrator and coordinator of the U.S. private-sector voluntary standardization system. It includes nearly 1000 company, organization, government agency, institutional, and international members.
	CSA		Products that bear a CSA Mark have been tested by the Canadian Standards Association (CSA) and meet applicable standards for safety and/or performance. These standards are written and administered by organizations such as the American National Standards Institute (ANSI), Underwriters Laboratories (UL), and CSA International. CSA Marks may appear alone or with indicators. CSA Marks that appear alone are used with products certified primarily for the Canadian market, to the applicable Canadian standards. CSA Marks that appear with the indicators “C” and “US” or “NRTL/C” is used with products certified for both the U.S. and Canadian markets, to the applicable U.S. and Canadian standards.
	IEC		The International Electrotechnical Commission (IEC) is a global, non-profit organization that develops and maintains voluntary quality, safety, and performance standards for electrical materials, products, and systems The IEC also publishes standards for the electronics and telecommunications industries. The IEC’s membership consists of the electrotechnical standards organizations from each of its 51 member nations. The American National Standards Institute (ANSI) represents the United States.
	MIL-STD		Transformers are manufactured and tested according to U.S. military standards (MIL-STD).
	UL		Underwriters Laboratories (UL) is a non-profit organization that tests components, systems, and materials according to its published standards for safety. Products that receive UL approval bear a UL Mark.
	TUV		TÜV Rheinland/Berlin-Brandenberg provides third-party product testing, system assessment, and certification services. TÜV Rheinland of North America is a member of the TÜV Rheinland Group and accredited by national organizations such as the American National Standards Institute (ANSI) and the Standards Council of Canada (SCC). Products that bear the TUVus Mark are certified for the U.S. market. Products that bear the cTUV Mark are certified for both the U.S. and Canadian markets.
	VDE		Verband Deutscher Elektrotechniker (VDE), the Association of German Electrical Engineers, is a non-profit testing institute that publishes standards and certifies electrical and electronic components. The VDE Mark indicates conformity with VDE, European Union (EU), and internationally harmonized standards. It confirms compliance with the protective requirements of the applicable EU directives.
	WEEE Compliant		Waste Electrical and Electronics Equipment (WEEE) is a European Union (EU) directive regarding the reuse, recycling and recovery of electrical and electronic equipment. WEEE establishes requirements and criteria for collection, treatment, recycling and recovery activities. It also makes producers responsible for financing these efforts. Retailers and distributors must provide consumers with a way to return used or obsolete equipment at no charge.
	Other		Other agencies that test or certify electrical, electronic or electrotechnical products.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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