3m Ohm Current Shunt Resistor Low ESR Surface Mount Resistor 5W For Precision Current Sensing
Price:
Negotiable
MOQ:
4000
Delivery Time:
3-5 work days
Brand:
Ellon
Product Description
2512 0.003Ω (3m Ohm) 1% Low ESR Metal Shunt Chip Resistor for Precision Current Sensing
This high-power, precision metal shunt chip resistor features Karma alloy construction with low ESR and high surge immunity. Ideal for current sensing in modern electronics, it is RoHS & REACH compliant for environmental safety.
Part Number Breakdown: ESR25F5WR003K04S
- ESR: Surface Mount Resistor family
- 25: 2512 package size (6.4mm x 3.2mm)
- F: 1% tolerance
- 5W: 5W power rating
- R003: 0.003Ω resistance
- K: Karma alloy material
- 04S: Packaging and termination details
Technical Specifications
| Parameter | Specification |
|---|---|
| Resistance Value | 0.003Ω (3mΩ) |
| Tolerance | ±1% |
| Power Rating | 5W |
| Package Size | 2512 (6.35mm * 3.15mm) |
| Temperature Coefficient (TCR) | ±50 ppm/°C |
| Resistance Material | Manganese Copper (Karma) alloy |
| Operating Temperature | -55°C to +175°C |
Key Features
- Ultra-low 0.003Ω resistance minimizes voltage drop in current sensing
- 5W power rating handles currents up to ~40.8A
- ±1% tolerance for precise current measurement
- Metal strip/shunt construction for stability and low inductance
- Karma alloy provides low TCR and long-term stability
- Excellent surge withstand capability for inrush currents
- Low ESR for high-frequency applications
- RoHS & REACH compliant for environmental safety
Karma Alloy Advantages
The Karma (Nickel-Chromium-Aluminum) alloy construction provides:
- Low Temperature Coefficient of Resistance (TCR) for stable performance across temperatures
- Exceptional resistance to oxidation and degradation
- Minimal thermal EMF for precise low-voltage measurements
- Optimized low-inductance design for accurate sensing in high-frequency applications
Primary Applications
- Power Supply Units (PSUs) for overcurrent protection and load monitoring
- Battery Management Systems (BMS) in electric vehicles and energy storage
- Motor drives and inverters for precise phase current feedback
- Welding equipment and high-current controllers
- Solar inverters and UPS systems for current sensing
PCB Design Recommendations
- Use large copper pours connected to terminals as heatsinks
- Implement thermal vias to transfer heat to inner/bottom PCB layers
- Ensure robust, void-free solder joints
- Follow manufacturer's recommended 2512 land pattern
The 2512 0.003Ω 5W Metal Shunt Chip Resistor delivers exceptional performance for high-current, precision measurement applications. Its Karma alloy construction and robust 2512 package provide stability, low TCR, and reliable power handling - making it ideal for demanding power electronics applications.
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Company
Shenzhen Shun Hai Technology Co., Ltd.
Location
Floor 7, Block B, Building 9, Baoneng Science and Technology Park, Qingxiang Road, Longhua New District, Shenzhen
Contact Person
jimmy