Comparison of Manganese Copper Alloy Resistors and Copper Alloy Resistors

Manganese copper alloy resistors and constantan alloy resistors are two common types of alloy resistors, each with unique performance characteristics and application scenarios. The following is a detailed comparison of the resistance of these two alloys:

Manganese copper alloy resistor and constantan alloy resistor
Main components: copper, manganese, nickel, copper, nickel
High and low resistivity
The temperature coefficient of resistance is very small, and the resistance value changes little with temperature. It is lower, but higher than that of manganese copper alloy
The thermoelectric potential of copper is relatively low and high, about 20-40 times that of manganese copper alloy
Easy to weld with slightly poor weldability, requiring the use of special soldering flux
Resistors with excellent stability have good long-term stability, but slightly inferior to manganese copper alloys
The working temperature range is moderate and wide, reaching below 480 degrees Celsius
Application scenarios: Precision measurement, standard resistors, shunt resistors, universal resistors, conductive connectors in high temperature environments, and resistance components
Relatively high and moderate cost

Manganese copper alloy resistor
Characteristics: Manganese copper alloy resistors have a very small temperature coefficient of resistance, and the resistance value changes very little with temperature. They also have low thermoelectric potential for copper and excellent long-term resistance stability. These characteristics make it the main material for making standard resistors, resistive elements, and shunt resistors.
Application: Manganese copper alloy resistors are widely used in the measurement technology of electrical instruments and as reference units for resistors, especially in situations that require high precision and stability.
Copper alloy resistor
Characteristics: Copper alloy resistors have a low temperature coefficient of resistance and a wide operating temperature range (up to below 480 degrees), good processing performance, and certain strength and wear resistance. However, compared to manganese copper alloy resistors, constantan alloy resistors have a slightly higher temperature coefficient of resistance, a greater thermoelectric potential on copper, and slightly poorer weldability.
Application: Copper alloy resistors are widely used in electrical, electronic, instrumentation and other fields, especially suitable for manufacturing electronic components such as current transformers, resistors, temperature sensors, as well as conductive connectors and resistance components in high-temperature environments.
summary
Manganese copper alloy resistors and constantan alloy resistors each have their own advantages and disadvantages. The choice of which type of resistor to use depends on the specific application scenario and requirements. In situations where high precision and stability are required, such as precision measurement and standard resistor manufacturing, manganese copper alloy resistors are a better choice. In situations where there is a certain requirement for cost and the working environment temperature is high or a certain degree of wear resistance is required, constantan alloy resistors have more advantages.