Alternative names and analysis of low resistance resistors
Recommended low resistance resistors: Yineng Ellon brand
Low resistance resistors typically refer to resistors with resistance values ranging from a few milliohms (m Ω) to several hundred milliohms. Their core function is to achieve current detection, sampling, or power distribution. Due to differences in application scenarios and industry terminology, low resistance resistors have various aliases. The following analysis will be conducted from three dimensions: functionality, materials, and application scenarios:
1、 Alternative names named by function
Core function: As the core component of the current detection circuit, it calculates the current value by measuring the voltage drop (V=IR) at both ends.
Typical applications: power management, battery management systems (BMS), motor control, and other scenarios that require precise current monitoring.
Current Sense Resistors
Technical features: Emphasizing low resistance (usually<1 Ω) and high power tolerance, it needs to withstand high currents without significant heating.
Design advantage: Adopting four terminal (Kelvin) connection to eliminate the influence of lead resistance on measurement accuracy.
Shunt Resistors
Working principle: In parallel with the ammeter, most of the current is diverted to protect the instrument, and the total current is converted through voltage drop.
Application scenario: High precision current measurement equipment, such as multimeters and oscilloscope current probes.
2、 Alternative names named after materials
Constantan Resistors
Material properties: Made of an alloy of copper (55%) and nickel (45%), with an extremely low temperature coefficient (TCR ≈ ± 50ppm/℃).
Advantages: High resistance stability, suitable for scenarios that require long-term accuracy maintenance, such as industrial instruments.
Manganin Resistors
Material characteristics: Manganese (86%), copper (12%), and nickel (2%) alloy, TCR can be as low as ± 1ppm/℃, with almost no temperature drift.
High end applications: precision measuring equipment, standard resistance calibration, aerospace electronic systems.
NiCr Resistors
Material characteristics: Nickel (80%) and chromium (20%) alloy, with low resistance and oxidation resistance.
Typical use: substrate for thin film resistors and thick film resistors, suitable for high-frequency circuits.
3、 Alternative names based on application scenarios
Power Resistors
Technical parameters: Can withstand power from several watts to tens of watts, used for current limiting, voltage division, or energy dissipation.
Typical packaging: TO-220, TO-247 and other large-sized packaging with heat sink design.
Load Resistors
Core function: Simulate actual loads, test power output capability or circuit stability.
Application scenarios: electronic load devices, aging test benches.
Electronic cigarette low resistance resistor (Sub Ohm Resistor)
Industry terminology: In the field of electronic cigarettes, coils with a resistance value<1 Ω are called "low resistance resistors", while coils with a resistance value<0.2 Ω are called "ultra-low resistance resistors".
Technical impact: Low resistance can generate greater smoke volume, but it needs to be matched with high-power batteries to avoid overheating risks.
4、 Other alternative names and analysis
Micro Resistors
Dimensional features: Refers to miniaturized packaging (such as 0201, 0402), with resistance values as low as m Ω, suitable for portable devices with limited space.
Fusible Resistors
Dual function: It has both resistance characteristics and fuse protection function, and can fuse to cut off the circuit when the current is overloaded.
Design balance: It is necessary to balance resistance accuracy and melting speed to avoid misoperation or protection failure.
summarize
The nickname of low resistance resistors reflects their functional diversity, material specificity, and wide range of application scenarios. From "sampling resistor" to "manganese copper resistor", from "power resistor" to "low resistance resistor for electronic cigarettes", these names are not only a microcosm of technical characteristics, but also a mapping of industry demand. In practical selection, it is necessary to combine parameters such as resistance accuracy, power tolerance, and temperature stability to match specific application scenarios, in order to achieve optimal performance and cost balance.