What do the letters on a circuit board mean? A reference designator unambiguously identifies a component within an electrical schematic or on a printed circuit board . The number is sometimes followed by a letter , indicating that components are grouped or matched with each other, e.g. R17A, R17B.
What do the numbers on a circuit board mean?
The second number is the function number of the circuit, such as “1” for the motherboard circuit, “2” for the power circuit and so on, which is determined by the circuit designer himself; The third and fourth digits represent the serial Numbers of similar devices on the circuit board. R117: resistance on the main board, serial number 17.
What is the meaning of the letters in the circuit diagram?
Generally, the first letter identifies the device category, such as R for resistor, C for capacitor, D for diode and Q for three-stage tube.
What are the markings on a circuit board called?
The technical term for the markings is "reference designators" (aka "refdes") and there are a few standards can define them. For schematic components, most EDA tools start off with one or few alphabets and then a sequential number. For example, R1 for the first resistor, C1 for the first capacitor, IC1 for the first IC and so on.
What do the different markings on a PCB mean?
In addition to that, you will also find other markings on the PCB. These are done by the fab house and are used to show UL certification numbers, UL standards that the PCB conforms to, sometimes showing RoHS compliance, and sometimes even a logo of the fab house. These can be done in silkscreening process, or anti-soldermask processes.
What is a T101 transformer?
What is the second number on a circuit board?
What is Rx in a circuit?
How do you read a circuit board label?
Label all the components on the drawing by the first letter of their type and a number. For example, the first capacitor you see should be labeled C1, the second C2, and so on. List in a column the labels of all the parts and their values found on the board.
What does V mean on a circuit board?
valveU: integrated circuit. V: valve (tube)
What does J mean on a PCB?
J: Connectors. T: Transformers. TP: Test points. P: Pads or pin headers.
What do the symbols on a circuit drawing mean?
Electrical circuit diagram symbols Electrical symbols are the most commonly used symbols in circuit diagramming. Amplifiers (denoted by triangle shapes) increase the output signal in your circuit. Capacitors (parallel lines) store energy in your system, while resistors (zigzag lines) reduce current flow.
What is F on a circuit board?
Diode. F. Fuse. IC. Integrated circuit - an alternative widely used non-standard abbreviation.
What does G mean in electrical terms?
ConductanceG – Conductance, the inverse of electrical resistance (R) GFCI – Ground Fault Circuit Interrupter, a type of circuit breaker. H – Gross Head, determining the maximum power that can be produced. h – Net Head, also known as effective head. Hz – Hertz, the SI unit of frequency, defined as one cycle per second.
What does E stand for in circuits?
What is Ohm's Law?QuantityOhm's Law symbolIn case you're wondering:VoltageEE = electromotive force (old-school term)CurrentII = intensityResistanceRΩ = Greek letter omega
What is U in a circuit?
Good question - "U" stands for: inseparable assembly integrated-circuit package microcircuit micromodule photon-coupled isolator. I think the U was picked because these are all classed as "Unrepairable", since they are all in sealed packages.
What does M stand for in electronics?
Milliampere, or milliamp: 1/1000 of an Ampere. Ampere is the basic unit for measuring electrical current.
What are the 5 electrical symbols?
There are five commonly used symbols in Electrical – Switch, Wire, Contactor, Motor, Transformer. These symbols can be used in any electrical drawings. Switches are used for ON/OFF any control circuit.
What is K in a circuit?
K for relays and contactors. V for tubes and semiconductors. (Consider “V” for “vacuum tube”.) Q for “switching devices for power circuits”, i.e. circuit breakers.
What is U and V in electrical?
I = current (ampere, A) U = electrical potential (volts, V) R = resistance (ohms, Ω)
Circuit Board Glossary of Terms - PCB Manufacturing and Fabrication
America's Oldest. A History of Innovation. Over the past 70 years, the electronics manufacturing industry has changed dramatically as the industry continues to adapt to evolving demands and technology.
PCB Production Terms | PCB Definitions | SFCircuits
Edge Bevel: A bevel operation performed on edge connectors to improve their wear and ease of installation. Edge Dip Solderability: Test A solderability test performed by taking a specially prepared specimen, fluxing it with a non-activated rosin flux, and then immersing it into a pot of molten solder at a predetermined rate of immersion for a predetermined dwell time, and then withdrawing it ...
What does R102 mean on a schematic?
On a schematic you will also see a electrical components symbol next to it will have a identification number next to its abbreviation (ie. You will see the symbol for a resistor. The abbreviation for a resistor "R" followed by a number to identify it on a PCB "R102". Next to the symbol you will also see its value "2.2K".
Do you see symbols on a PCB?
On a PCB is a completely different story. Sometimes you will not have any abbreviations, and Most of the time you will not see any symbols. Most of the time you will see a components next to a letter with a number next to it (ie.
Circuit Symbols of Electronic Components
There are so many electronic components that it is not possible to mention symbols of all the components in this one single tutorial. Hence, I have enlisted symbols of only the basic and mostly components.
Conclusion
I hope this tutorial on Electronic Components Name Abbreviations and Symbols was useful and helpful for you. Do share with others so that everyone can gain knowledge.
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Santosh, founder of this Electronics Tutorial Website, is an Electronics Geek, Blogger and Young Entrepreneur. He possesses vast experience in the field of electronics , electronic components , PCB , Soldering , SMT , Telecommunication, ESD Safety, and PCB Assembly Tools, Equipment and Consumables.
What is a T101 transformer?
T101: transformer on the main board. “If R117 is a resistance, both ends should be connected with a multimeter.” it is not scientific to directly measure the resistance on the circuit board. The measurement result will be smaller than the actual value, or even much smaller.
What is the second number on a circuit board?
The second number is the function number of the circuit, such as “1” for the motherboard circuit, “2” for the power circuit and so on, which is determined by the circuit designer himself; The third and fourth digits represent the serial Numbers of similar devices on the circuit board.
What is Rx in a circuit?
Rx is the resistance, there’s a lot of resistance in the circuit diagram, R1, R2….
