What are the series of Ever Ohms metal film resistors?

Complete analysis of the Ever Ohms metal film resistor series: the reliable cornerstone of high-precision circuits
On circuit boards that require precise current sampling and voltage division, a compact Tian'er metal film resistor often carries the key task of ensuring the stable operation of the entire system.
Since its establishment in 1988, Tian'er Technology has focused on the research and manufacturing of electronic components. The metal film resistor series adopts vacuum evaporation or sputtering technology to deposit metal thin films such as nickel chromium alloy on ceramic substrates, which has the characteristics of strong stability, low temperature coefficient, low noise, and good high-frequency characteristics.
This type of resistor has become an indispensable basic component in fields such as automotive electronics, industrial control, medical equipment, and precision instruments.
01 Enterprise Background
As a well-known electronic component manufacturer in Taiwan, China, EVER OHMS's product line focuses on high-precision resistors, covering various types of resistors and peripheral components.
The company has passed quality management system certifications such as ISO9001 and IATF 16949, and complies with the AECQ200 automotive electronics standard.
Tian Er metal film resistors are widely used in industries such as industrial control, medical equipment, consumer electronics, instrumentation, and new energy vehicles, with high consistency and excellent electrical performance.
02 Product Series Detailed Explanation
Tian'er Metal Film Resistors have formed multiple targeted product series based on different application requirements and technical characteristics.
The Universal Metal Film Resistors series is the foundation of Tian'er Metal Film Resistors product line, and model names usually include the "TRM" symbol. This series offers a wide range of resistance options, ranging from 10 Ω to 2M Ω.
In terms of precision level, these resistors offer multiple options ranging from ± 0.1% to ± 5%, with high-precision models (± 0.1%) being particularly suitable for applications with strict requirements for circuit accuracy.
The TRL series is a metal film surface mount resistor designed specifically for high-precision current detection. This series adopts special metal resistive elements and suitable barrier layer structures, effectively extending the service life of the terminals.
The TRL series offers a resistance range from 0.0005 Ω to 10 Ω, almost covering the needs of most current detection applications. The resistance tolerance can be selected as ± 1%, ± 3%, or ± 5%, with a temperature coefficient as low as ± 50ppm/° C.
The anti surge metal film patch resistor series has specially enhanced its anti surge characteristics and can withstand surge currents of up to tens of amperes. This feature effectively prevents resistance damage caused by transient high currents, greatly improving the stability and safety of the entire electronic system.
This series of products offers various size specifications such as 0402, 0603, 0805, 1206, etc., with a rated power range generally between 0.1W and 1W.
03 Key Technical Parameters
Understanding the key technical parameters of Tian Er metal film resistors is crucial for correct selection and application.
Resistance accuracy is an important indicator for measuring resistance performance. Tian'er Metal Film Resistors offer multiple precision levels, ranging from high precision of ± 0.1% to standard precision of ± 5%.
In practical applications, for high-precision scenarios such as analog amplification and filtering circuits, it is recommended to choose metal film resistors with a range of 0.1% to 0.5%; Ordinary signal paths can use products with a precision level of 1% and 5%.
The temperature coefficient characterizes the stability of the resistance value with temperature variation. The typical temperature coefficients of Tian'er metal film resistors include multiple levels such as ± 100ppm/℃, ± 50ppm/℃, and ± 25ppm/℃.
For circuits operating in high or low temperature environments, high stability models with low temperature coefficients should be selected. For example, the temperature coefficient of the TRL series can be as low as ± 50ppm/° C, ensuring stability at various environmental temperatures.
The rated power and packaging size directly affect the power handling capability and spatial applicability of resistors. The power range of Tian'er metal film resistors varies from 0.1W to 3W, and the package size covers multiple options from 0402 to 2512.
Taking the TRL series as an example, the resistance power of the 2512 package can reach 2.53.0W, the power of the 2010 package is 1.02.0W, and the power of the 1206 package is 1.0W.
04 Application Fields
Tian Er metal film resistors play an important role in multiple industries due to their excellent performance.
In the field of automotive electronics, these resistors are widely used for current detection in battery management systems (BMS). They can accurately monitor the battery charging and discharging current, provide reliable data for battery state estimation, and ensure the safe and efficient operation of the power system of electric and hybrid vehicles.
Industrial control is another important application field of Tian Er metal film resistors. In the field of industrial automation, these resistors are widely used in power circuits, sensor circuits, and control circuits.
Its high precision and low-temperature drift characteristics ensure the long-term stability of industrial equipment in harsh environments, improving the reliability of the entire system.
In precision instruments and medical equipment, there are extremely high requirements for the reliability and accuracy of electronic components. The low noise characteristics of Tian'er metal film resistors are beneficial for maintaining high fidelity audio signals and are very suitable for use in audio equipment.
In medical equipment, high reliability is required and it is suitable to use 0.1% high-precision products.
05 Selection and Procurement Guide
Choosing the appropriate Tian Er metal film resistor requires comprehensive consideration of various requirements in circuit design.
The ratio of resistance and power is the primary consideration for selection. In circuit design, it is essential to choose a rated power that meets the requirements for current flow and power consumption. For example, when the power consumption on the resistor is 0.15W, a model with a power consumption of ≥ 0.25W should be selected, with a safety margin of 20% to 30%.
Accuracy and temperature drift requirements should be evaluated based on specific application scenarios. For high-precision applications such as analog amplification and filtering circuits, it is recommended to choose 0.1% 0.5% metal film resistors; The normal signal path can use 1% and 5%.
For circuits operating in high or low temperature environments, high stability models with low temperature coefficients (such as 25ppm/℃) should be selected.
The working environment directly affects material selection and series determination. Standard series can be used in ordinary environments, while in harsh environments such as automotive electronics or industrial control, vehicle grade or special series should be selected.
For application environments containing sulfides, models with sulfur resistant treatment should be selected.
In actual procurement, for small and medium-sized batch needs, purchases can be made through officially authorized electronic component stores such as Lichuang Mall and Huaqiang Electronic Network.
If there is a need for large quantities or customization, it is recommended to directly contact the original factory or agency channels of Tian'er Electronics to obtain more cost-effective quotations and technical support.
The application scenarios of Tian Er metal film resistors are constantly expanding. In the control system of new energy vehicles, they ensure the accuracy of current sampling; In the RF units of 5G base stations, they maintain the stability of signal transmission.
With the advancement of digitalization of medical equipment and Industry 4.0, the demand for high-precision and high stability resistors in the market continues to grow. Through continuous research and technological innovation, Tian'er Technology continuously improves product performance to meet the development needs of these cutting-edge fields.