The precise correspondence between SMT resistor packaging and size and power

With the rapid development of electronic technology, SMT resistors, as a commonly used electronic component, play an important role in various electronic products. In order to meet the needs of different application scenarios, various types of SMT resistor packaging have been launched in the market. This article will provide a detailed introduction to the precise correspondence between SMT resistor packaging and size and power, helping you make the selection process easier

1、 Types and characteristics of SMT resistor packaging

1 Four terminal SMT resistor (4-Way)

A four terminal patch resistor is a common surface mount resistor with four pins. Due to its compact structure, it is suitable for applications with limited space on circuit boards. The accuracy of four terminal SMT resistors is relatively high, usually around 0.05%

2 Two terminal SMT resistor (2-Way)

Two terminal SMT resistor is a common surface mount resistor with two pins. Due to its simple structure and low cost, it is widely used in various electronic products. The accuracy of two terminal SMT resistors is generally 1% to 2%

3 Single terminal SMT resistor (1-Way)

A single terminal SMT resistor has only one pin and is typically used to replace other types of resistors. Although its accuracy is low, it is still widely used in some specific application scenarios due to its low cost

2、 The relationship between the size and power of SMT resistor packaging

When choosing SMT resistor packaging, in addition to considering the type of packaging, attention should also be paid to the correspondence between its size and power. The following is a common table for the correspondence between the size and power of SMT resistor packaging:

|Package size | minimum rated power（ μ W) Maximum rated power（ μ W)|

|-------- | -------- | --------|

|1608 | 10 | 50|

|2012 | 20 | 100|

|2512 | 50 | 250 |
(* Note: The actual rated power needs to be determined based on the specific model)|

|3216 | 100 | 500 |
(* Note: The actual rated power needs to be determined based on the specific model)|

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By referring to the above table, we can understand the minimum and maximum rated power corresponding to different sizes of SMT resistor packaging. In practical applications, we need to choose the appropriate SMT resistor packaging and its rated power based on the requirements of circuit design and the heat dissipation capacity of the equipment

Understanding the precise correspondence between SMT resistor packaging and size and power is of great significance for us to have a clearer understanding of product performance indicators in the selection process. I hope this article can provide you with useful information and contribute to your journey in electronic technology