SMD 0402 Jumper

Derating Curve

1.What is the difference between zero euro resistance and ordinary resistance in use?

There are the following differences in the use of zero ohm resistors and ordinary resistors:

Resistance value: The resistance value of a zero ohm resistor is very low, usually between 0.1 Ω and 1 Ω, while the resistance value range of a regular resistor is wide, ranging from tens of ohms to tens of megaohms. Therefore, in situations where lower resistance values are required, such as bridging, protective circuits, etc., zero ohm resistors can be used; In situations where high resistance values are required, such as voltage division, current limiting, etc., ordinary resistors should be used.

Function: Zero ohm resistors are mainly used for bridging, protection, and single point grounding on circuit boards, while ordinary resistors play a role in voltage division, current limiting, filtering, and load in circuits. Therefore, in circuit design, it is necessary to choose appropriate resistors based on actual needs.

Current resistance: Zero ohm resistors have weaker current resistance and can only withstand smaller currents, while ordinary resistors have stronger current resistance and can withstand larger currents. Therefore, in high current situations, ordinary resistors should be used; In low current situations, zero ohm resistors can be used.

Temperature coefficient: The temperature coefficient of zero ohm resistance is relatively large, which means its resistance value is greatly affected by temperature; The temperature coefficient of ordinary resistors is relatively small, and their resistance value is less affected by temperature. Therefore, when working in high temperature environments, resistors with smaller temperature coefficients should be selected.

Packaging: Zero ohm resistors and ordinary resistors have their own packaging forms. Zero ohm resistors are usually packaged in small packages such as 0603 and 0805, while ordinary resistors come in various packaging forms, ranging from small to large. When selecting resistors, it is necessary to choose the appropriate packaging form based on the space and heat dissipation requirements of the circuit board.

Price: The price of zero ohm resistors is higher than that of ordinary resistors. Therefore, in circuit design, suitable resistors should be selected based on actual needs and cost considerations.

2.Precautions for zero ohm resistance?

Zero ohm resistance, also known as 0 ohm resistance, is a type of resistor with extremely low resistance values. In circuit design, there are the following precautions for zero ohm resistance:

Circuit protection: Zero ohm resistance can be used as circuit protection, serving as a low-cost fuse. When a short circuit or overcurrent fault occurs in the circuit, the zero ohm resistor can be melted first, thereby disconnecting the circuit and preventing larger accidents from occurring.

Single point grounding for analog and digital grounds: In cases where a single point connection is required for analog and digital grounds, a zero ohm resistor can be used for connection, rather than directly connecting the two grounds together. This can avoid ground circuit and reduce noise interference.

Current resistance: Although zero ohm resistance has a lower resistance value, its ability to withstand current is weaker. Therefore, when using a zero ohm resistor, it is necessary to ensure that it operates within a safe current range to avoid damaging the resistor.

3.The advantages of SMD 0402 jumper resistance?

Package size: 0402 Package is a commonly used form of SMT resistor packaging, with a size of 1.016mm × 0.508mm (length × Width), height is approximately 0.794mm. This packaging form has a small volume and is suitable for high-density circuit board design.

Resistance value: The nominal resistance value of the zero ohm resistor in the 0402 package is usually low, such as 50 milliohms, 100 milliohms, etc. Its resistance value is very small, mainly used for bridging and single point grounding on circuit boards.

Current resistance: The zero ohm resistor in the 0402 package has weak current resistance and can only withstand small currents. In practical applications, it is necessary to ensure that it operates within a safe current range to avoid damaging the resistor.

Temperature coefficient: The temperature coefficient of zero ohm resistance is relatively large, meaning its resistance value is greatly affected by temperature. When working in high temperature environments, it is necessary to choose a zero ohm resistor with a smaller temperature coefficient.

Price: The price of zero ohm resistors packaged in 0402 is higher than that of ordinary resistors. When designing circuits, appropriate resistors should be selected based on actual needs and cost considerations.

Application scenario: The 0402 packaged zero ohm resistor is suitable for circuit board designs with limited space, such as mobile phones, tablets, wearable devices, and other electronic products. Among these products, the space on the circuit board is very valuable, so small packaged zero ohm resistors are needed.

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