100A Precision DC Shunt Resistor with Electron Beam Welding
Precision current sensing up to 100A
Low resistance, high efficiency
Stable metal alloy construction
Low TCR (≤50ppm/°C)
Compact open-air design
Ideal for BMS, inverters, DC systems
Description
Product Overview
The 100A Precision DC Shunt Resistor with Electron Beam Welding is engineered for accurate current measurement in high-current DC power systems.
As a DC shunt resistor, it measures current by detecting the voltage drop across a precisely controlled low resistance element.
Electron beam welding ensures a stable metallurgical bond with extremely low contact resistance, minimizing thermal drift under continuous load. This DC shunt resistor delivers high accuracy, excellent repeatability, and long-term reliability in demanding industrial environments.
Feature of DC Shunt Resistor
✅ High accuracy and stability under continuous load
✅ Low temperature coefficient (TCR ≤ 50ppm/°C) ensures precision across wide temperature ranges
✅ Non-inductive design improves high-frequency performance
✅ High overload capacity for demanding electrical systems
✅ Fully compliant with RoHS environmental standards
Dimension
Model D A B F M C (Test screw hole) Thread 100A-75mV 120±2 22±1 100±1 49±1 4±0.2 Φ10.5±0.2 M4 100A-75mV (Alt) 104±2 22±1 85±1 62±1 2±0.2 Φ8.5±0.2 M4 100A-75mV (Alt 2) — — — 49±1 3±0.2 Φ8.5±0.2 M4 200A-75mV 120±2 22±1 100±1 49±1 4±0.2 Φ10.5±0.2 M4 200A-75mV (Alt) 104±2 22±1 85±1 49±1 3±0.2 Φ8.5±0.2 M4 250A-75mV 120±2 22±1 100±1 49±1 4±0.2 Φ8.5±0.2 M4 300A-75mV 120±2 22±1 100±1 49±1 4±0.2 Φ8.5±0.2 M4 300A-75mV (Alt) 120±2 26±1 100±1 55±1 4±0.2 Φ10±0.2 M4 400A-75mV 120±2 29±1 100±1 49±1 4±0.2 Φ10.5±0.2 M4 500A-75mV 120±2 36±1 100±1 49±1 4±0.2 Φ10.5±0.2 M4 600A-75mV 120±2 44±1 100±1 49±1 4±0.2 Φ8.5±0.2 M4 - DC Shunt Resistor Key Specifications
| Product Range | Rated Current | Rated Voltage Drop | Accuracy |
|---|---|---|---|
| FL3 Series | 100A | 75mV | 0.2% / 0.5% / 1% / 2% / 5% |
| 200A | 0.2% / 0.5% / 1% / 2% / 5% | ||
| 250A | 0.2% / 0.5% / 1% / 2% / 5% | ||
| 300A | 0.2% / 0.5% / 1% / 2% / 5% | ||
| 400A | 0.2% / 0.5% / 1% / 2% / 5% | ||
| 500A | 0.2% / 0.5% / 1% / 2% / 5% | ||
| 600A | 0.2% / 0.5% / 1% / 2% / 5% |
Applications in Solar & Industrial Systems
These current sensing resistors are widely used across various industries for precise current detection, monitoring, and circuit protection:
⚡ Power electronics – inverters, converters, SMPS
🔋 Battery management systems (BMS)
🛠️ Motor control and drives
🏭 Industrial automation equipment
📡 Communication, renewable energy, and smart grid systems
Whether you’re designing DC power supplies, electric vehicles, or precision instruments, our metal alloy shunt resistors offer the accuracy, durability, and efficiency your system requires.
For technical standards on shunt resistors and current sensing design, refer to
IEEE Official Website.
Learn More About Precision Current Sensing
