What is reference designator in Bom?

What is reference designator in Bom?

Reference designators are sequenced comments and instructions that pertain to a component. For example, you may have drawings that clarify the assembly process for certain components, or further instructions for the use of a large quantity of the same component.

Why are reference designations used?

A reference designator is used to identify a component within an electrical schematic or on a printed circuit board (PCB). It consists of one or two letters followed by numbers (e.g., C15, D10, J5, R18).

What is the reference designation of resistor?

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….Standard Reference Designators.

Designator Component Type
R Resistor
RN Resistor network
RT Thermistor
RV Varistor

What does CR mean on a circuit board?

CR often means ‘current rectifier’, translate diode.

What does C mean on a PCB?

For example, the letter R is a reference prefix for the resistors of an assembly, C for capacitors, K for relays.

What does L stand for on a PCB?

Circuit notation and reference designators

More commonly used Circuit Schematic Reference Designators
Reference Designator Component Type
J Connector jack (normally but not always refers to female contact)
L Inductor
LS Loudspeaker

How do you identify circuit board components?

How to Identify Circuit Board Components

  1. Start by identifying the printed circuit board, or PCB.
  2. Identify other “nuts and bolts” electronic circuit components.
  3. Locate the circuit board’s battery, fuses, diodes and transistors.
  4. Locate the processor, or processors.

What is U on a PCB?

Reference designators are very simple: they are printed directly on the surface layer of the PCB to denote specific components. Here is a short list of reference designators on PCBs: U: Integrated circuits. R: Resistors. L: Inductors.

What does J stand for on a PCB?

What is Q on a PCB?

Q. Transistor (all types) R. Resistor.

What is R1 in PCB?

Additionally, what does SW mean on a circuit board? For example your PCB contains a label “R1” meaning the first resistor on the board, followed by the standard symbol for a resistor, followed by the value of the resistor; “10k” (10,000 ohms).