Ellon ESR25F5WR002F04G 2512 Metal Shunt Chip Resistor with 0.002R (2mOhm) Ultra

In the field of high-power current sensing and power management, the Ellon-brand ESR25F5WR002F04G model stands out as a preferred shunt device for industrial electronics, automotive electronics, and new energy equipment, thanks to its core parameters of 2512 package, 0.002R (2mOhm) ultra-low resistance, 5W high power, and 1% high precision. Constructed from FeCrAl (Iron-Chromium-Aluminum) alloy material, this resistor combines low temperature drift, high stability, strong surge resistance, and eco-friendly properties, fully complying with RoHS, REACH, and lead-free environmental standards. It delivers a reliable solution for current sampling under harsh operating conditions.

The 2512 package (6.4mm × 3.2mm) is a mainstream specification for high-power chip resistors, striking an optimal balance between compact size and power handling capacity. It accommodates automated surface-mount technology (SMT) assembly, is compatible with both reflow and wave soldering processes, and meets the requirements of high-density PCB layout. The 0.002R (2mOhm) ultra-low resistance design significantly reduces power loss (P=I²R) during current sampling, minimizes interference with the main circuit, and enhances current detection accuracy—especially suitable for precision sampling in high-current (10A+) circuits. With a 5W rated power (at 70°C), it belongs to the high-power category within the 2512 package, capable of withstanding continuous high-current loads and meeting the demands of high-power scenarios such as power modules, motor drives, and battery protection boards. The ±1% high precision tolerance ensures consistent resistance values and long-term stability, avoiding sampling errors caused by resistance deviations and making it ideal for precision current monitoring and closed-loop control systems.

As the core identifier of the product, 2512 0.002R (2mOhm) 5W runs through the entire process of design, production, and application. It is a key feature that distinguishes it from ordinary resistors and a core basis for customer selection, boasting irreplaceable competitiveness in the high-power, low-resistance shunt market.

The Ellon ESR25F5WR002F04G uses FeCrAl (Iron-Chromium-Aluminum) alloy as the core resistive material. Compared with traditional Nickel-Chromium (NiCr) and Manganese-Copper (MnCu) alloys, it delivers superior overall performance.

FeCrAl alloy exhibits an extremely low temperature coefficient of resistance (TCR), typically ±25ppm/℃. Across a wide temperature range of -55℃ to +170℃, its resistance value changes minimally—far better than ordinary alloy resistors (±50 to ±200ppm/℃). This low temperature drift ensures the resistor maintains a stable resistance value even in high-temperature operating environments (e.g., power modules, automotive engine compartments), preventing current sampling distortion caused by temperature drift and enhancing system control accuracy and reliability.

FeCrAl alloy features high resistivity (approx. 1.45μΩ·m), excellent high-temperature oxidation resistance, and mechanical strength, enabling it to withstand instantaneous surge current impacts without burning out or experiencing resistance drift. In scenarios such as power-on, motor startup, and short-circuit protection, surge currents can reach several times the rated current—easily damaging ordinary resistors. In contrast, this product absorbs impact energy effectively thanks to its strong surge resistance, protecting circuit safety and extending service life.

With outstanding high-temperature resistance (maximum operating temperature up to 1400℃), FeCrAl alloy ensures uniform temperature distribution across the resistor body under continuous 5W high-power loads, avoiding local overheating, aging, or resistance drift. Additionally, a dense Al₂O₃ oxide film forms on the FeCrAl alloy surface, isolating it from air and moisture. This provides excellent corrosion resistance and long-term stability, making it suitable for industrial applications requiring prolonged continuous operation.

Committed to green manufacturing, Ellon ensures the ESR25F5WR002F04G strictly complies with EU RoHS directives, REACH regulations, and lead-free environmental requirements. The brand implements full-process control over raw material procurement, production processes, and finished product testing to guarantee eco-friendly compliance.

The product meets RoHS 2.0 (2011/65/EU), free of lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr⁶⁺), polybrominated biphenyls (PBBs), and polybrominated diphenyl ethers (PBDEs). Hazardous substance levels in homogeneous materials are below limits (Pb ≤ 0.1%, Cd ≤ 0.01%, etc.), making it safe for use in electronic and electrical equipment while reducing environmental pollution and health risks.

Certified to REACH regulations, the product contains no SVHC (Substances of Very High Concern) (e.g., phthalates, heavy metal compounds). It complies with EU requirements for chemical registration, evaluation, authorization, and restriction, enabling free circulation in the EU market and meeting high-end customer environmental audit standards.

Using lead-free solder and lead-free electroplating processes, the resistor’s terminals feature pure tin (Sn) plating with zero lead content. The resistor body, packaging materials, and auxiliary components are all lead-free and eco-friendly, with zero lead emissions during production. Aligning with the global lead-free trend, it is suitable for products with environmental certifications (e.g., UL, CE, CCC).

The Ellon ESR25F5WR002F04G adopts Electron Beam (EB) welding + molded encapsulation for a robust structure and stable performance. At its core, a FeCrAl alloy sheet is securely bonded to high-conductivity copper electrodes via electron beam welding, minimizing contact resistance and maximizing heat dissipation efficiency—critical for stable 5W high-power operation. Encapsulated in high-temperature epoxy resin, it offers moisture resistance, dust protection, electrical insulation, and mechanical shock resistance, adapting to harsh conditions (humidity, vibration, dust) and enhancing reliability and service life.

Furthermore, its 4-wire Kelvin terminal design eliminates the influence of lead and contact resistance, further improving current sampling precision for high-accuracy current sensing applications.

Leveraging its integrated advantages of 2512 0.002R (2mOhm) 5W 1%, FeCrAl material, low temperature drift, surge resistance, and eco-friendliness, the Ellon ESR25F5WR002F04G is widely used in:

• Industrial Power Supplies: AC-DC/DC-DC modules, high-power switching power supplies, UPS systems for output current sampling, overcurrent protection, and power monitoring;
• Automotive Electronics: New energy vehicle BMS, on-board chargers (OBC), motor controllers, ABS systems, adapting to harsh automotive temperature and vibration conditions;
• New Energy Equipment: Photovoltaic inverters, energy storage converters (PCS), wind power control systems for high-current loop sampling and protection;
• Industrial Control: Servo drives, frequency converters, PLC power modules, industrial robot control systems for precision current closed-loop control;
• Battery Equipment: Lithium battery protection boards, battery equalizers, fast chargers for monitoring charge/discharge current and ensuring battery safety.

As a benchmark 2512 0.002R (2mOhm) 5W 1% FeCrAl metal shunt chip resistor, the Ellon ESR25F5WR002F04G delivers core advantages of ultra-low resistance, high power, high precision, low temperature drift, strong surge resistance, and eco-friendliness, perfectly meeting current sampling needs in high-power, high-current scenarios. The FeCrAl material provides exceptional temperature stability and impact resistance, while full compliance with RoHS, REACH, and lead-free standards balances performance with sustainability. Its 2512 package supports automated production, reducing assembly costs. A cost-effective choice for industrial electronics, automotive electronics, and new energy equipment, it offers customers a reliable, stable, and efficient current sensing solution.