2512 1.07R metal film resistor recommended Ellon brand model
Date：2025-07-24
Viewed：3
Regarding the two Ellon brand 2512 packaged 1.07 Ω metal film resistor models you listed, the following is a clear analysis and recommended recommendations:
Comparison of key parameters
|Parameters | EGM25FU1R07SDS | EAM25FS1R07SDS|
|Power | 3.5W (higher) | 2W|
|Functional Features | High Surge Resistance | High Sulfurization Resistance|
|Applicable scenarios | Power supply/high current impact environment | Sulfur containing corrosive environment|
|Core advantages | Resistance to instantaneous overload | Long term chemical stability|
Selection recommendation logic
1. Priority given to power demand
If the circuit power is close to or exceeds 2W (especially for switch mode power supply/power circuit), EGM25FU1R07DDS (3.5W) is a must-have, leaving enough margin to avoid overheating failure.
2. Priority given to environmental characteristics
Sulfur containing environments (automotive electronics, industrial sites, coastal areas): Choose EAM25FS1R07DDS, whose special coating can resist resistance drift or open circuit caused by hydrogen sulfide corrosion.
High wave scenario (power input stage, motor drive): Choose EGM25FU1R07SDS, which can withstand transient impacts such as startup surges and lightning induced currents.
3. Cost and redundancy design
If the power demand is ≤ 1.5W and there are no special environmental risks, EAM25FS (2W) is more cost-effective; If pursuing ultimate reliability (such as medical/military), the power redundancy of EGM25FU (3.5W) is safer.
final recommendation
Main power circuit, inverter, motor drive: Priority EGM25FU1R07DDS (3.5W anti surge) to ensure stability under high temperature/impact.
Automotive electronics, chemical instruments, outdoor equipment: Choose EAM25FS1R07DDS (2W sulfur resistant) to prevent early failure caused by sulfide corrosion.
Ordinary consumer electronics: If the power consumption is less than 1.5W, EAM25FS1R07DDS has a higher cost-effectiveness; If the layout is compact and the heat dissipation is poor, it is still recommended to use EGM25FU.
>Practical tips:
>Even if choosing a 3.5W resistor, it is necessary to ensure that the PCB design has sufficient heat dissipation copper foil (refer to IPC2152 standard), as the surface temperature of the 2512 package may exceed 150 ℃ at 3.5W power! Anti sulfurization models can increase their lifespan by more than 10 times in sulfur-containing environments, but cannot replace sealing processes.
