0.0003R Current Shunt Resistor 6W SMD 2512 Resistor Low Inductance

Product Specification

 ESR25F6W0M30M04G: 2512 0.0003R(3mR) 6W 1% Metal Shunt Chip Resistor

 Introduction

The ESR25F6W0M30M04G is a highperformance, lowresistance metal shunt chip resistor designed for precision current sensing applications. This surfacemount device (SMD) belongs to the ELLON (亿能) brand's ESR series and combines a compact 2512 package size with an extremely low resistance value of 0.0003R (0.3mΩ or 300μΩ) and a high power rating of 6W. Its 1% tolerance ensures accurate current measurement, making it suitable for demanding electronic circuits where precise power management is critical.

 Technical Specifications

   Model: ESR25F6W0M30M04G

   Resistance Value: 0.0003Ω (0.3mΩ / 300μΩ)

   Tolerance: ±1%

   Power Rating: 6W

   Package Size: 2512 (6432 metric) (Dimensions: 6.35mm x 3.15mm)

   Temperature Coefficient (TCR): ±100 ppm/°C

   Resistance Material: Manganese Copper (MnCu) alloy

   Construction: Features a fullmetal welded structure for durability and excellent temperature stability.

   Inductance: Typically less than 2 nH, making it suitable for highfrequency applications.

   Thermal EMF: Low thermal electromotive force (EMF), typically less than 3 µV/°C, minimizes measurement errors caused by temperature gradients.

   Operating Temperature Range: 55°C to +175°C.

 Structure and Manufacturing Process

The ESR25F6W0M30M04G 2512 0.0003R(3mR) 6W metal shunt resistor is manufactured using advanced electron beam welding technology. This process ensures high reliability and robust connections between the internal MnCu alloy resistance element and the external terminations. The 2512 package size offers a balance between space savings and power handling capability. The thicklayer construction or metal alloy element within the 2512 footprint is optimized for low resistance and high power dissipation, allowing it to handle up to 6W of power effectively.

 Key Features and Advantages

   High Power Density: The 6W power rating within the compact 2512 package size provides excellent power handling per unit volume, contributing to more efficient and smaller PCB designs.

   Low Resistance Value: The extremely low 0.0003R(3mR) resistance minimizes power loss (I²R loss) and voltage drop during current sensing, improving overall system efficiency.

   High Precision: The 1% tolerance guarantees accurate and consistent current measurement, which is crucial for precision control in power management systems.

   Excellent Temperature Stability: The ±100 ppm/°C temperature coefficient and the properties of the MnCu alloy ensure stable performance across a wide temperature range from 55°C to +175°C.

   Low Inductance and Low Thermal EMF: The design minimizes parasitic inductance (below 2 nH) and thermal EMF (under 3 µV/°C), reducing noise and measurement errors in dynamic switching and temperaturevarying environments.

   High Reliability and Durability: The robust construction, often featuring electron beam welding and fullmetal contacts, ensures resistance to pulse overloads, mechanical stress, and environmental factors, offering longterm stability and automotivegrade reliability (some variants may be AECQ200 compliant).

  RoHS compliant current sensing and voltage division.

  Lead free.

  Excellent Anti-Surge ability.

 Application Fields

The ESR25F6W0M30M04G 2512 0.0003R(3mR) 6W shunt resistor is ideal for various applications requiring precise current monitoring and management:

   Power Management Systems: Used for current feedback in switchmode power supplies (SMPS), voltage regulator modules (VRMs), DCDC converters, and power inverters.

   Automotive Electronics: Suitable for engine control units (ECUs), transmission systems, antilock braking systems (ABS), battery management systems (BMS) in electric vehicles, audio amplifiers, and climate control systems due to its potential for high reliability and stability.

   Industrial Controls and Motor Drives: Employed in inverter controls for HVAC systems, industrial automation, servo drives, and robotics for precise current sensing and overload protection.

   Test and Measurement Equipment: Found in precision measuring instruments and load testing equipment where accurate current measurement is paramount.

   Consumer Electronics and Server Power Supplies: Used in highcurrent power rails within servers, gaming consoles, and other demanding consumer applications.

 Comparison with Other Technologies

Compared to thickfilm or thinfilm resistors of similar size, the ESR25F6W0M30M04G metal shunt resistor offers significantly lower resistance values (down to 0.0003R(3mR)), better temperature stability (±100 ppm/°C), higher power density (6W in 2512), and lower inductance. While thickerfilm resistors in 2512 might offer higher resistances and different TCRs, they cannot achieve such low ohmic values with the same stability and power handling.

 Conclusion

The ESR25F6W0M30M04G 2512 0.0003R(3mR) 6W 1% metal shunt chip resistor is a highquality component that excels in precision current sensing applications. Its combination of an extremely low resistance value of 0.0003R(3mR), a high power rating of 6W, tight 1% tolerance, and excellent thermal performance within the compact 2512 package makes it a reliable and efficient choice for designers working on advanced power management systems in automotive, industrial, and consumer electronics. Its robust construction ensures durability and longterm stability, meeting the demanding requirements of modern electronic circuits.