Ever Ohms Metal Film Resistance Series and Parameter Explanation

EVER OHMS is a well-known electronic component manufacturer in Taiwan, China, China. It focuses on the R&D and production of high-performance resistors. Its metal film resistors are famous for their high precision, low temperature coefficient, excellent surge resistance and diversified packaging specifications, and are widely used in automotive electronics, industrial control, consumer electronics and other fields. The following is a detailed analysis of its core series and parameters:

1、 Main series of metal film resistors

Tian Er's metal film resistors cover multiple series, optimized for different application scenarios. The following are representative series and their characteristics:

|Metal film low resistance series | Milliohm resistance (m Ω), high power (up to 5W), ± 1% high precision, strong temperature stability | MA452750FR500FZ (500m Ω± 1%, 5W) | Current detection, power management, new energy vehicle BMS|

|High precision thin-film surface mount resistors (VTR series) | Ultra high precision (± 0.1%), low temperature drift (± 25ppm/℃), small-sized packaging (0402~1206) | TR0402B37R4Q1025Z (37.4 Ω± 0.1%) | Medical equipment, precision instruments, communication circuits|

|Anti surge metal film patch resistor | Enhanced resistance to instantaneous high voltage/current surge, wide resistance range (several Ω~several M Ω), power 1/10W~2W | CRH2512F5R10E04S (5.1 Ω± 1%, 2W) | Power protection, industrial frequency converter, automotive ECU|

|Alloy Sampling Resistance Series | Low Resistance (milliohm level), High Accuracy (± 1%), Low TCR (± 50ppm/℃), High Current Resistance | MA120610FR020FZ (20m Ω± 1%, 1W) | Battery Management System, Motor Control, Charging Circuit|

|Universal Thin Film Resistors (RD Series) | Standard Accuracy (± 1%~± 5%), Temperature Coefficient ± 50ppm/℃, High Cost Performance | RD080510K (10k Ω± 1%, 50ppm) | Consumer Electronics, Home Appliances, Basic Circuit Design|

2、 Detailed explanation of key parameters

The core parameters of Tian Er metal film resistors are optimized for harsh working environments, as follows:

Resistance value and accuracy

Resistance range: Wide coverage, low resistance values (such as 0.5m Ω~1 Ω) are used for current detection, and medium high resistance values (1 Ω~10M Ω) are used for voltage division/current limiting.

Accuracy level: Provides ± 0.1% (precision level), ± 1% (high precision level), ± 5% (universal level) to meet different circuit stability requirements.

Power and Voltage Endurance Capability

Power range: 0.063W (0402 package) to 5W (4527 package), high-power models (such as CRW1218) support industrial high current scenarios.

Surge resistance: Specially designed to withstand instantaneous high voltage/current surges, protecting the core circuit and outperforming ordinary surface mount resistors.

Temperature characteristics

Temperature coefficient (TCR):

Precision series: ± 25ppm/℃ (such as VTR series);

Universal series: ± 50ppm/℃~± 400ppm/℃.

Working temperature range: 55 ℃~+170 ℃ (some models reach+155 ℃), suitable for extreme environments in automobiles/industries.

Packaging and mechanical characteristics

Package sizes: 0201, 0402, 0603, 0805, 1206, 2512, etc., supporting high-density PCB layout.

Insulation resistance:>10 ΩΩ, ensuring safe isolation under high voltage.

Reliability and Certification

Long lifespan, certified by ISO 9001 and IATF 16949 (automotive grade), compliant with RoHS environmental standards.

3、 Application scenarios and selection suggestions

Automotive Electronics: Surge Resistors Used for ECU/Airbag; Alloy resistors are used for BMS current sampling (such as MA series).

Industrial automation: High power resistors (CRH/CRW series) compatible with frequency converters/servo drives; Precision resistors (VTR series) are used for measuring instruments.

Consumer electronics: universal thin film resistors (RD series) used for power/charging management; Low resistance resistors are used for current limiting in fast charging circuits.

Selection criteria: prioritize determining the series based on current size (power/resistance), ambient temperature (TCR), space constraints (packaging), and accuracy requirements, and then match the specific model. For example, new energy vehicle BMS requires the selection of MA series milliohm resistors (± 1%, above 1W), while precision instruments recommend the VTR series (± 0.1%, ± 25ppm/℃).

Tian Er Metal Film Resistors provide highly reliable solutions for various industries through precise combination of parameters and series. For a complete list of models or technical documentation, please refer to [Hua Nian Mall]（ https://www.hnstshop.com )