2512 0.5R alloy resistor and thick film power up resistor parameter model

The following is a parameter and brand analysis for the 2512 size 0.5 Ω (500m Ω) patch resistor model you provided, sorted by brand:
1、 Tianer brand
TRL251230FR500E04Z
Material: Metal film
Power: 3W (high-power design)
Accuracy: ± 1% (high precision)
Temperature coefficient: 50ppm/℃ (low-temperature drift, excellent stability)
Features: The metal film process provides low noise and long-term stability, suitable for high temperature sensitive scenarios such as precision instruments and power modules.
STE2512M2W0R500F
Material: Metal film
Power: 2W
Accuracy: ± 1%
Temperature coefficient: 50ppm/℃
Features: Same as the former, it is a metal film, but with slightly lower power, suitable for applications with medium power but high stability, such as signal processing circuits.
2、 Ellon brand
EMA25F3W0R500KDG
Material: Alloy
Power: 3W
Accuracy: ± 1%
Temperature coefficient: 50ppm/℃
Characteristics: Alloy resistors have extremely low temperature coefficient of resistance (TCR) and low thermal electromotive force, making them suitable for high-precision measurement scenarios such as current detection and motor control.
EHP25JSR500JDL
Material: Thick film power amplifier
Power: 2W
Accuracy: ± 5% (normal accuracy)
Temperature coefficient: 600ppm/℃ (high temperature drift)
Features: The thick film process has low cost, and the power up design enhances the rated load capacity. It is suitable for scenarios that do not require high accuracy but need to withstand instantaneous overcurrent, such as switching power supplies.
EHP25FSR500JDL
Material: Thick film power amplifier
Power: 2W
Accuracy: ± 1%
Temperature coefficient: 600ppm/℃
Features: Improve accuracy to 1% on the basis of thick film, balance cost and performance, suitable for current sampling in general industrial control or consumer electronics.
Selection suggestion:
High precision/low temperature drift requirements: Priority should be given to choosing Tian'er metal film or Ellon alloy models (TCR 50ppm).
Cost sensitive applications: Ellon thick film power up models (such as EHP25FSR500JDL) reduce costs while ensuring 1% accuracy.
High power scenario: Tian'er TRL251230F (3W) or Ellon EMA25F3W (3W) alloy resistors are more suitable for high load environments.
Note: Alloy resistors are usually more expensive than thick film/metal film, but have better performance; The design of thick film power enhancement improves the rated power through structural optimization, and attention should be paid to its temperature drift characteristics.