How to choose from the 2512 1R Ever Ohms brand with so many models?

Seeing that you are confused when choosing a 1 ohm resistor in the 2512 package (0603 metric size) with so many models, this is indeed a common problem! The main differences among so many models lie in power, materials, special performance (such as surge resistance, sulfur resistance), and the different series of manufacturers. The choice of which model depends entirely on your specific application scenario and requirements.

Let me help you sort out the key parameters and applicable scenarios of these models:



Core factors to consider when making a choice:

1. Required power (most importantly):
Calculate or estimate the actual power consumption (I ² R or V ²/R) of a resistor in a circuit.
Resistors with nominal power significantly greater than (recommended at least 1.52 times margin) actual power consumption must be selected to ensure reliability and lifespan. When the heat dissipation conditions are poor, a larger margin is required.
For example, if the actual power consumption is 0.8W, choose a model with at least 1.5W or 2W; The actual power consumption is 1.5W, choose a model with at least 3W.
Power sorting reference:` CR2512 (1W)` < `AS2512J1R00E04Z (1.5W), ST2512 (1W)` < `CRH2512, TGL/TRL251220, AS2512J1R00E04H, STH2512 (2W)` < `CUH2512, TRL251230 (3W)` < `TGL251235 (3.5W)` < `CHH2512 (4W)`

2. Environmental requirements:
Surge resistance: Will the resistor withstand transient high current/high-energy pulses such as startup surges, lightning induction, and load switching?
Yes → Select the model with clear indication of surge resistance:` TGL251220F1R00E04Z`, `TRL251230F1R00E04Z`, `TGL251235F1R00E04U`, `AS2512J1R00E04Z/H`。 Metal film resistors (such as TGL/TRL) typically have better surge resistance than thick films.
Anti sulfurization: Does the application environment contain sulfides (such as sulfur-containing air, sulfur released from rubber seals)? This is common in automotive electronics, equipment near industrial areas, or coastal areas.
Yes → Select the models with clear markings for sulfur resistance: 'ST2512J1R00E04A', 'STH2512F1R00E04Z'. They use special sulfur resistant terminals and materials.
High temperature/high humidity: requires extremely high long-term stability? Metal film resistors (TGL/TRL) typically have better temperature coefficients and long-term stability.

3. Accuracy requirements:
Check the precision indicators in the suffix: 'F' usually represents ± 1%, and 'J' usually represents ± 5%.
For example, 'CR2512F1R00E04S' (1%) vs' CR2512J1R00E04S' (5%). For critical applications such as current sampling, a precision of 1% is usually necessary.

4. Cost and availability:
Ordinary thick film resistors (CRH) have the lowest cost and are also the most common.
The cost of metal film resistors (TGL, TRL) is relatively high.
Resistors with special properties such as surge resistance, sulfur resistance, and higher power such as CUH, CHH, and AS have higher costs.
Considering cost-effectiveness and supply channels while meeting the requirements.

For the models you have listed, it is recommended to classify them according to typical application scenarios

Universal, low-cost, medium low power (1W2W):
`CR2512F1R00E04S ` (1W, 1%) is the most basic and commonly used
`CR2512J1R00E04S' (1W, 5%) is commonly used in foundations and has low precision requirements
`CR2512F1R00E04Z '(1W, 1%) is similar to the one above, but the terminals or packaging may be slightly different
`Economic choice for CRH2512F1R00E04S ` (2W, 1%) when 2W power is required
`CRH2512J1R00E04S` (2W, 5%)
`CRH2512J0R00E04Z '(2W, 5%, 0 Ω? Note that' J0R00 'may be a 0 Ω jumper) Please confirm if it is 1 Ω

Need for higher power (3W4W):
`CUH2512F1R00E04Z ` (3W) 3W thick film
`CUH2512J1R00E04Z ` (3W) 3W thick film
`TRL251230F1R00E04Z ` (3W, metal film) 3W metal film for better stability
`TGL251235F1R00E04U ` (3.5W, metal film anti surge) has high power and anti surge capability
`CHH2512J1R00P05Z '(4W) has the highest power (4W). Please note that' P05 'may represent accuracy or other parameters, and specific specifications should be consulted

Need surge resistance capability:
`TGL251220F1R00E04Z ` (2W, metal film anti surge) classic choice
`TRL251230F1R00E04Z ` (3W, metal film) is a higher power metal film that usually has good surge resistance
`TGL251235F1R00E04U ` (3.5W, metal film anti surge) high power+anti surge
`AS2512J1R00E04Z '(1.5W anti surge)
`AS2512J1R00E04H ` (2W anti surge)

Need for sulfur resistance:
`ST2512J1R00E04A '(1W sulfur resistant) basic sulfur resistant
`STH2512F1R00E04Z ` (2W sulfur resistant) Higher power sulfur resistant

Suggested steps for selection:

1. Calculate power: Clearly determine how much power your circuit needs the resistor to withstand, plus enough margin (at least 1.5 times, and the heat dissipation difference should be more than 2 times).
2. Check the environment: Is there a risk of surge? Is there a risk of vulcanization? Is the working temperature very high?
3. Accuracy: Can 1% or 5% meet the requirements?
4. Model selection: Based on the above three points, select the models that meet the criteria from the list.
5. Comparing cost and supply: Compare the price and ease of procurement among models that meet the 13 point criteria.

Important Notice:

Be sure to consult the data manual: The above analysis is based on common naming conventions and typical characteristics. Before making the final selection, it is necessary to find the official datasheet for the specific model you are considering and carefully check the following key parameters:
Rated power and corresponding environmental temperature/derating curve
Resistance and accuracy
Maximum operating voltage/overload voltage
temperature coefficient
Specific indicators of surge resistance capability (such as what standards are met, how much energy/current/time can it withstand)
Testing standards and grades for resistance to sulfurization
Terminal structure (affecting welding and heat dissipation)
Heat dissipation design: The 2512 package achieves 3W and 4W power, with high requirements for PCB heat dissipation design (copper foil area, heat dissipation vias, air circulation). It is necessary to design the heat dissipation according to the requirements of the device specification, otherwise the actual power will not reach the nominal value.

Summary: There is no "best" model, only the model that is "most suitable" for your current application. By clearly defining your power requirements, environmental conditions, and accuracy requirements, you can significantly narrow down your selection range. For critical applications or special environments (high waves, sulfur), do not hesitate to choose models with corresponding characteristics, reliability is more important. The key to selection is to manually calculate power and consult the data manual! I hope these suggestions can help you make a more confident choice.