2512 1.13R resistor model, characteristics and functions
Date：2025-07-24
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The following is a detailed comparison and selection recommendation for two recommended models of Ellon brand 2512 package and 1.13 Ω (1.13R) metal film surface mount resistors, with comprehensive parameter characteristics and application scenario analysis:
1、 Comparison of core parameters
|Features | EGM25FU1R13DDS | EAM25FS1R13DDS|
|Power | 3.5W (high power) | 2W (regular power)|
|Functional characteristics | High surge resistance (power input/lightning protection) | High sulfide resistance (sulfide corrosion protection)|
|Material/Process | Metal Film, ± 50ppm/℃ Temperature Drift | Metal Film, ± 50ppm/℃ Temperature Drift|
|Accuracy | ± 1% | ± 1%|
|Applicable environment | Voltage mutation and surge impact scenarios (such as power modules) | Sulfide containing environment (industrial areas)|
|Inventory and delivery time | Customization required (minimum order quantity of 5000pcs, long delivery time) | Regular supply (specific details to be checked)|
2、 Core Features and Applicable Scenarios Analysis
1. EGM25FU1R13DDS: designed specifically for extreme voltage surges
Surge resistance: Adopting a reinforced metal film structure, it can withstand instantaneous high voltage impacts (such as lightning protection at the power input end and buffer circuits for switch power supplies).
High power advantage: 3.5W power (top-level in 2512 package), suitable for high current paths (such as motor drive, power conversion), requires heat dissipation design.
Typical scenario:
Input filtering of industrial power PDM module;
Surge absorption resistor for LED driver power supply;
Equipment that requires surge testing according to IEC 6100045.
2. EAM25FS1R13DDS: resistant to chemical corrosion environment
Sulfurization resistance: Special coating prevents the invasion of sulfides (commonly found in environments containing rubber, fuel, or industrial waste gas), avoiding resistance drift or open circuit failure.
Power applicability: 2W meets the requirements of most control circuits, but requires derating (recommended actual load ≤ 1.4W).
Typical scenario:
Automotive electronic ECU module (near engine compartment);
Sensor circuits for chemical/petroleum equipment;
Industrial controllers for high humidity coastal areas.
3、 Selection Decision Suggestions
Prioritize the scene of EGM25FU1R13DDS:
Power input level protection (such as AC/DC converter front-end);
Design that requires a power of over 3W and limited space (such as compact power modules);
Outdoor equipment with high lightning risk, such as photovoltaic inverters and communication base stations.
Prioritize the scenario of EAM25FS1R13DDS:
Automotive electronics or industrial equipment (exposed to sulfur-containing air);
Long term high reliability requirements (such as safety monitoring systems);
Power demand ≤ 2W and cost sensitive projects (with low premium for sulfur resistant models).
Design considerations:
Power derating: It is recommended that the actual power consumption of metal film resistors be ≤ 70% of the nominal value (e.g. 3.5W model load ≤ 2.45W, 2W model ≤ 1.4W);
Heat dissipation enhancement: The 3.5W resistor needs to be equipped with PCB heat dissipation copper foil or thermal conductive via holes;
Sulfurization risk identification: If the equipment is deployed in high sulfur environments such as oil fields and tunnels, EAM series must be selected.
4、 Alternative models and expansion suggestions
If the inventory or delivery time of the above models does not meet the demand (such as customized minimum of 5000pcs for the EGM series), the following alternative solutions of the same brand can be referred to:
