How do you read a chip resistor value?

Reading a SMD resistor code

1. the first two numbers indicates the significant digits for the resistance, e.g. “22” indicates 22 ohms.
2. the third number will be a multiplier that must be multiplier by the first two numbers, or will indicate how many zeros should be added to the first two numbers.

How do you decode the resistance of a SMD resistor?

Standard-tolerance SMD resistors use a 3-digit code to mark the resistance value on the part. The first two numbers will indicate the significant digits, and the third will be the multiplier. ‘R’ is used to indicate the position of a decimal point.

How do I know what size SMD resistor to use?

SMD Resistor Sizes The size of SMD resistors is indicated by a numerical code, such as 0603. This code contains the width and height of the package. So, the imperial code 0603 indicates a length of 0.060″ and a width of 0.030″.

What does 4R7 mean?

4R7 means 4.7 Ohms. 47K means 47 Kilo Ohms = 47 kΩ = 47000 Ohms. 4K7 means 4.7 Kilo Ohms = 4.7 kΩ = 4700 Ohms.

How are resistor values marked and coded?

Marking Codes used on Chip Resistors Where space allows, chip resistors are marked with value in 3 or 4 characters. The coding is 2 or 3 digits followed by one multiplier expressing the number of zeros. For example 472 = 4700 ohms = 4K7, 1331 = 1330 ohms = 1K33, 330 = 33 ohms = 33R (N.B. not 330R).

How do I identify a 4.7 K ohm resistor?

The 4.7kΩ resistor shown here has color bands of yellow and violet to begin – which have digit values of 4 and 7 (47). The third band of the 4.7kΩ is red, which indicates that the 47 should be multiplied by 102 (or 100). 47 times 100 is 4,700!

How do I read SMD components?

There are two methods to indicate the resistance value on the SMD resistors’ appearance. 1. In Arabic numbers: the first two numbers indicate the absolute numbers of the resistance value, and the last number means the power of 10. For example, 103 means 10000Ω, 391 means 390Ω, 473 means 47000Ω.

How do I find my SMD marking code?

To identify a particular SMD device, first identify the package style and note the ID code printed on the device. Now look up the code in the alphanumeric listing which forms the main part of this book by clicking on the first character shown in the left-menu. Unfortunately, each device code is not necessarily unique.

What is a 47R resistor?

47R wirewound fusible metal film resistor featuring a 1W power rating and non-flammable coating. The resistors are designed to fuse under abnormal conditions including voltage surges and circuit malfunctions. Resistance: 47R.

What is the color code for 3.3 ohm?

3.3 Ohm Resistor Color Code: Orange, Orange, Golden, Golden. Resistance: 3.3 Ohm, Power Rating: 0.25 Watt, Approximate Maximum Current: 275mA .

How do I identify my SMD chip?

What does a 470 ohm resistor look like?

470 Ohm Resistor Color Code The four band 470 resistor is easy to recognize with its’ distinctive pattern of yellow, violet, and brown color bands.

What color is a 4.7 Ohm resistor?

4.7 Ohm Resistor Color Code: Yellow, Violet, Golden, Golden. Resistance: 4.7 Ohm, Power Rating: 0.25 Watt, Approximate Maximum Current: 231mA .

What is the ohmic value of a 4 digit resistor?

Resistor color code guide and handy tables that show the ohmic values for commonly used 3-Digit, 4-Digit (E24 Series), 4-Digit (E96 Series),and EIA-96 series resistors. ”We hope that you find these useful.” 4-digit SMD resistors from 0.1 ohm to 9.76 M ohms.

What is the most commonly used resistor code?

The three- and four-digit systems, as well as an Electronic Industries Alliance (EIA) scheme known as EIA-96, are the most regularly observed codes. Standard tolerance resistors are usually coded using a 3-Digit SMD resistor coding method.

What is the color code for a through-hole resistor?

See also the color code calculator on this page for MELF and standard through-hole resistors. Most chip resistors are marked with a 3-digit or 4-digit code — the numerical equivalent of the familiar color code for through-hole components. Recently, a new coding system (the EIA-96) has appeared on precision SMDs.

What are the ohms of SMD resistors?

4-digit SMD resistors from 0.1 ohm to 9.76 M ohms. marked with the EIA-96 code from 1 ohm to 97.6 Mohms. marked with the EIA-96 code from 1 ohm to 97.6 M ohms.