Ever Ohms Alloy Resistance MA Series Advantageous Supply

Analysis Report on the Advantage Supply of Tian Er Alloy Resistance MA Series
1、 Technical parameter advantages
1. Ultra low resistance and high power density
Resistance range: covering 0.5m Ω to 100m Ω, suitable for high current sampling scenarios (such as power modules and motor drives).
Typical model: MA251230F0m50SZ (0.5m Ω, 3W), suitable for high-frequency switching environments, reducing heat loss.
Power specifications: Supports 2W, 3W, 4W, with 2512 package (6.35mm × 3.2mm) being the preferred choice for high power density.
Reduced rating design: When the ambient temperature is 70 ℃, the power needs to be reduced to 80% of the rated value, in conjunction with PCB copper foil heat dissipation (recommended area ≥ 100mm ², with ≥ 4 vias).
2. High precision and low-temperature drift
Accuracy level: Provides four levels of accuracy: ± 0.5%, ± 1%, ± 2%, and ± 5%. The ± 0.5% high-precision model is suitable for battery management systems (BMS).
Temperature Coefficient (TCR): Typical values range from ± 25ppm/℃ to ± 50ppm/℃. Low temperature drift models (such as ± 25ppm/℃) are suitable for wide temperature range scenarios (-55 ℃ to+170 ℃).
Stability test: After 1000 hours of high temperature and high humidity (85 ℃/85% RH) testing, the resistance change rate is ≤± 1%.
3. Packaging and heat dissipation
Mainstream packages: 1206, 2512, 2725, 2728, 4527, with 2512 package supporting 3W power and 4527 package supporting 5W (requiring additional PCB area).
Current path design: Recommended four terminal Kelvin connection method to eliminate lead resistance errors (such as SFCA series).
2、 Advantages in application fields
1. High precision current detection
Power module and BMS: Combining ultra-low resistance (such as 1m Ω) with high precision to achieve precise current sampling. For example, a 1m Ω resistor generates a voltage drop of 100mV at 100A current, which requires the use of a high-precision ADC.
Medical equipment: Low temperature drift model (such as ± 25ppm/℃) to avoid long-term drift affecting accuracy.
2. Overcurrent protection and power module
Industrial equipment and charging stations: wide temperature range stability (-55 ℃~+170 ℃) and surge resistance, providing reliable overcurrent protection.
New energy and frequency converter: Balancing high power and low resistance with low resistance (0.1 Ω~1 Ω), suitable for servo motors, stepper motor drives, and DC-DC converters.
3. Automotive electronics and high-end fields
Vehicle specification certification: MA251220JR000CZ has passed AEC-Q200 certification, with high temperature resistance (55 ℃~170 ℃), sulfur resistance, and is suitable for new energy vehicle circuits.
Precision instrument: Ultra low temperature float (± 15ppm/℃) is suitable for testing instruments and sensor signal conditioning.
3、 Supplier and market advantages
1. Official authorized channels
Huanian Mall: Tian'er Deep Cooperation Platform, providing original product guarantee, full range product coverage, and professional technical support.
Shunhai Technology: Tian'er's core agent, focusing on the distribution of alloy resistors, with over 5000 models in stock, supporting one-stop supply and customized solutions.
2. Cost effectiveness and delivery advantages
Thick film series: The unit price of CRH/CR models is less than ¥ 0.3, suitable for consumer electronics.
Alloy series: MA model unit price is ¥ 1.5~2.5, with better durability. Core agents have long-term stock available, supporting small batch sample procurement and emergency replenishment.
3. Certification and Reliability
Certification support: AEC-Q200, RoHS and other certifications, suitable for high-end fields such as medical equipment and automotive electronics.
Alternative solution: If out of stock, Vishay WSL25121L000FEA (1W thick film) or TT Electronics LRZ2512R000 (2W alloy, 35A rated current) can be used.
4、 Compare the advantages of competitors
1. Material and Performance
Alloy material: Temperature drift ≤ 50ppm/℃, far superior to thick film resistors (± 100ppm/℃), with better stability in high temperature environments.
Low temperature drift characteristic: MA251220JR000CZ has a resistance drift rate of ≤± 1% under high temperature load, suitable for precision instruments.
2. Certification and reliability
Vehicle certification: The MA series has passed AEC-Q200, and competitors such as Ellon's EHP25JS0R00VDJ need to verify certification information.
Sulfurization resistance: Suitable for new energy vehicle circuits, competitors need to handle vulcanization issues separately.
5、 Summary
The MA series of Tian Er alloy resistors has demonstrated significant advantages in power management, automotive electronics, industrial control, and other fields due to its ultra-low resistance value, high precision, and low-temperature drift technology. By supplying through official authorized channels such as Huanian Mall and Shunhai Technology, we provide original product guarantee, full range coverage, and customized support. Combined with cost-effectiveness and fast delivery time, we have become the preferred solution for high-end electronic design.