1206 0.91R resistor model parameter comparison
Date：2025-07-29
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For the selection recommendation of 1206 package and 0.91 Ω resistor (excluding table), the following are the main categories and representative models:
1、 Recommended core categories
1. Thick film power up resistor (0.5W)
Features: Low cost, strong universality, suitable for conventional circuits.
Representative model:
Ellon EHP16FUR910JEL：0.5W, 1%, 600ppm
Ellon EHP16JUR910JEL: 0.5W, 5%, 600ppm (can save costs when precision requirements are not high)
Guoju RC1206FR07091RL: 0.5W, 1%, thick film universal type
2. High power metal film resistor (0.5W/1W)
Features: Low temperature float (50ppm), high stability, suitable for precision or temperature sensitive scenarios.
Representative model:
Ellon ELR16FTR910DES: 1W, 1%, 50ppm (preferred for high power)
Ellon ELR16FUR910DES：0.5W, 1%, 50ppm
Tian'er TRL120610FR910P05Z: 1W, 1%, 50ppm (domestic cost-effective alternative)
Vishay CRCW1206910RFKEA: 1W, 1%, metal film (international brand alternative)
3. High reliability thick film resistor (1W)
Features: Achieve 1W power through thick film technology, with better cost-effectiveness than metal film.
Representative model:
ROHM MCR03ERTJ91R: 1W, 5%, 200ppm (Japanese high-power thick film)
2、 Key recommendations for selection
Power priority:
Choose Ellon ELR16FTR910DES or Tian'er TRL120610FR910P05Z (metal film) for 1W;
0.5W and low-cost Ellon EHP16FUR910JEL (thick film) is required.
Accuracy and temperature drift:
Metal film (50ppm) must be selected for precision circuits (such as current detection);
For ordinary applications such as current limiting, thick film (600ppm) can be selected.
Brand substitution:
International brands: Weishi, Panasonic (ERJ series);
Domestic/Taiwanese: Tian'er, Guoju, Wangquan (LR1206 series).
3、 Precautions
1. Heat dissipation design:
The 1W resistor in the 1206 package must strictly follow the PCB heat dissipation layout (such as copper plating and heat dissipation vias).
2. Cost balance:
Metal film is 30%~50% more expensive than thick film, and thick film is optional for non essential scenarios.
3. Inventory situation:
Taiwanese brands such as TAI and Guoju usually have better delivery times than Japanese/American brands.
When selecting the actual model, it is recommended to prioritize confirming the power requirements and temperature drift requirements, and then select the model based on cost and supply. If specific specifications for brand replacement models are required, parameters can be provided for further screening.
