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- Reference_designator abstract "A reference designator unambiguously identifies a component in an electrical schematic or on a printed circuit board. The reference designator usually consists of one or two letters followed by a number, e.g. R13, C1002. The number is sometimes followed by a letter, indicating that components are grouped or matched with each other, e.g. R17A, R17B.IEEE 315 contains a list of Class Designation Letters to use for electrical and electronic assemblies. For example, the letter R is a reference prefix for the resistors of an assembly, C for capacitors, K for relays.IEEE 200-1975 or \"Standard Reference Designations for Electrical and Electronics Parts and Equipments\" is a standard that was used to define referencing naming systems for collections of electronic equipment. IEEE 200 was ratified in 1975. The IEEE renewed the standard in the 1990s, but withdrew it from active support shortly thereafter. This document also has an ANSI document number, ANSI Y32.16-1975.This standard codified information from, among other sources, a United States military standard MIL-STD-16 which dates back to at least the 1950s in American industry.To replace IEEE 200-1975, ASME, a standards body for mechanical engineers, initiated the new standard ASME Y14.44-2008.This standard, along with IEEE 315-1975, provide the electrical designer with guidance on how to properly reference and annotate everything from a single circuit board to a collection of complete enclosures.It breaks down a system into units, and then any number of sub-assemblies. The unit is the highest level of demarcation in a system and is always a numeral. Subsequent demarcation are called assemblies and always have the Class Letter \"A\" as a prefix following by a sequential number starting with 1. Any number of sub-assemblies may be defined until finally reaching the component. Note that IEEE-315-1975 defines separate class designation letters for separable assemblies (class designation 'A') and inseparable assemblies (class designation 'U'). Inseparable assemblies—i.e., \"items which are ordinarily replaced as a single item of supply\"—are typically treated as components in this referencing scheme.Examples: 1A12A2R3 - Unit 1, Assembly 12, Sub-assembly 2, Resistor 3 1A12A2U3 - Unit 1, Assembly 12, Sub-assembly 2, Inseparable Assembly 3Especially valuable is the method of referencing and annotating cables plus their connectors within and outside assemblies.Examples: 1A1A44J5 - Unit 1, Assembly 1, Sub-Assembly 44, Jack 5 (J5 is a connector on a box referenced as A44) 1A1A45J333 - Unit 1, Assembly 1, Sub-Assembly 45, Jack 333 (J333 is a connector on a box referenced as A45)A cable connecting these two might be: 1A1W35 - In the assembly A1 is a cable called W35.Connectors on this cable would be designated: 1A1W35P1 1A1W35P2ASME Y14.44-2008 continues the convention of Plug P and Jack J when assigning references for electrical connectors in assemblies where a J (or jack) is the more fixed and P (or plug) is the less fixed of a connector pair, without regard to the gender of the connector contacts.The construction of reference designators is covered by IEEE 200-1975/ANSI Y32.16-1975 (replaced by ASME Y14.44-2008) and IEEE-315-1975. The table below lists designators commonly used, and does not necessarily comply with the standard.".
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- Reference_designator wikiPageLength "8648".
- Reference_designator wikiPageOutDegree "99".
- Reference_designator wikiPageRevisionID "697660725".
- Reference_designator wikiPageWikiLink ASME.
- Reference_designator wikiPageWikiLink Antenna_(radio).
- Reference_designator wikiPageWikiLink Attenuator_(electronics).
- Reference_designator wikiPageWikiLink Battery_(electricity).
- Reference_designator wikiPageWikiLink Buzzer.
- Reference_designator wikiPageWikiLink Capacitor.
- Reference_designator wikiPageWikiLink Category:Electronic_engineering.
- Reference_designator wikiPageWikiLink Cathode_ray_tube.
- Reference_designator wikiPageWikiLink Ceramic_resonator.
- Reference_designator wikiPageWikiLink Circuit_breaker.
- Reference_designator wikiPageWikiLink Circuit_diagram.
- Reference_designator wikiPageWikiLink Circulator.
- Reference_designator wikiPageWikiLink Contactor.
- Reference_designator wikiPageWikiLink Crystal_oscillator.
- Reference_designator wikiPageWikiLink Delay_line_memory.
- Reference_designator wikiPageWikiLink Digital_signal_processor.
- Reference_designator wikiPageWikiLink Diode.
- Reference_designator wikiPageWikiLink Diode_bridge.
- Reference_designator wikiPageWikiLink Disconnector.
- Reference_designator wikiPageWikiLink Display_device.
- Reference_designator wikiPageWikiLink Electric_generator.
- Reference_designator wikiPageWikiLink Electric_motor.
- Reference_designator wikiPageWikiLink Electrical_connector.
- Reference_designator wikiPageWikiLink Electronic_component.
- Reference_designator wikiPageWikiLink Electronic_oscillator.
- Reference_designator wikiPageWikiLink Electronic_symbol.
- Reference_designator wikiPageWikiLink Ferrite_bead.
- Reference_designator wikiPageWikiLink Fiducial_marker.
- Reference_designator wikiPageWikiLink Field-effect_transistor.
- Reference_designator wikiPageWikiLink Filter_(signal_processing).
- Reference_designator wikiPageWikiLink Fuse_(electrical).
- Reference_designator wikiPageWikiLink Gas-filled_tube.
- Reference_designator wikiPageWikiLink Gender_of_connectors_and_fasteners.
- Reference_designator wikiPageWikiLink Household_hardware.
- Reference_designator wikiPageWikiLink Inductor.
- Reference_designator wikiPageWikiLink Integrated_circuit.
- Reference_designator wikiPageWikiLink JFET.
- Reference_designator wikiPageWikiLink Jumper_(computing).
- Reference_designator wikiPageWikiLink Light-emitting_diode.
- Reference_designator wikiPageWikiLink Lightning_arrester.
- Reference_designator wikiPageWikiLink Liquid-crystal_display.
- Reference_designator wikiPageWikiLink Loudspeaker.
- Reference_designator wikiPageWikiLink MOSFET.
- Reference_designator wikiPageWikiLink Microphone.
- Reference_designator wikiPageWikiLink Neon_lamp.
- Reference_designator wikiPageWikiLink Oscillation.
- Reference_designator wikiPageWikiLink Photoresistor.
- Reference_designator wikiPageWikiLink Potentiometer.
- Reference_designator wikiPageWikiLink Power_dividers_and_directional_couplers.
- Reference_designator wikiPageWikiLink Power_supply.
- Reference_designator wikiPageWikiLink Printed_circuit_board.
- Reference_designator wikiPageWikiLink Programmable_logic_controller.
- Reference_designator wikiPageWikiLink Relay.
- Reference_designator wikiPageWikiLink Resistor.
- Reference_designator wikiPageWikiLink Silicon_controlled_rectifier.
- Reference_designator wikiPageWikiLink Switch.
- Reference_designator wikiPageWikiLink Test_point.
- Reference_designator wikiPageWikiLink Thermistor.
- Reference_designator wikiPageWikiLink Thermocouple.
- Reference_designator wikiPageWikiLink Thin-film-transistor_liquid-crystal_display.
- Reference_designator wikiPageWikiLink Thyristor.
- Reference_designator wikiPageWikiLink Transformer.
- Reference_designator wikiPageWikiLink Transient-voltage-suppression_diode.
- Reference_designator wikiPageWikiLink Transistor.
- Reference_designator wikiPageWikiLink Tuner_(radio).
- Reference_designator wikiPageWikiLink Vacuum_fluorescent_display.
- Reference_designator wikiPageWikiLink Vacuum_tube.
- Reference_designator wikiPageWikiLink Valve.
- Reference_designator wikiPageWikiLink Variable_capacitor.
- Reference_designator wikiPageWikiLink Varistor.
- Reference_designator wikiPageWikiLink Video_camera_tube.
- Reference_designator wikiPageWikiLink Zener_diode.
- Reference_designator wikiPageWikiLinkText "Reference designator".
- Reference_designator wikiPageWikiLinkText "reference designator".
- Reference_designator wikiPageUsesTemplate Template:Columns-list.
- Reference_designator wikiPageUsesTemplate Template:Portal.
- Reference_designator wikiPageUsesTemplate Template:Reflist.
- Reference_designator subject Category:Electronic_engineering.
- Reference_designator comment "A reference designator unambiguously identifies a component in an electrical schematic or on a printed circuit board. The reference designator usually consists of one or two letters followed by a number, e.g. R13, C1002. The number is sometimes followed by a letter, indicating that components are grouped or matched with each other, e.g. R17A, R17B.IEEE 315 contains a list of Class Designation Letters to use for electrical and electronic assemblies.".
- Reference_designator label "Reference designator".
- Reference_designator sameAs Q831990.
- Reference_designator sameAs Betriebsmittel_(Elektrotechnik).
- Reference_designator sameAs m.043p0pr.
- Reference_designator sameAs Q831990.
- Reference_designator wasDerivedFrom Reference_designator?oldid=697660725.
- Reference_designator isPrimaryTopicOf Reference_designator.