75mV 200A Precision Current Ammeter Shunt Resistor
Technical Specs:
Accuracy: 0.5 level (2–4000A), 1.0 level (5000–10000A)
Temp range: -40°C to +60°C; RH ≤95% (at 35°C)
Overload: 120% rated current for 2 hrs
Voltage drop: 50mV, 60mV, 70mV, 75mV, 100mV
Heat: ≤80°C (<50A); ≤120°C (≥50A)
Description
Overview
The 75mV 200A Precision Ammeter Shunt Resistor provides accurate DC current sensing for applications such as battery monitoring, solar power systems, and industrial motor control. It delivers a stable 75mV output at 200A, enabling ammeters to display precise readings in real time.
Unlike ordinary resistors, this shunt features low temperature coefficient and excellent long-term stability, even under heavy load. Thanks to its rugged design and high-conductivity materials, it performs reliably in harsh environments.
Moreover, its compact structure simplifies installation, while optional terminal types allow for flexible integration. Whether you’re upgrading an EV system or building a smart meter, this shunt offers both performance and value.
A lower sampling ratio (mA reading vs actual current in amps) results in better linearity and measurement accuracy.
For deeper insights into shunt resistor working principles, see this tutorial on All About Circuits.
Main Technical Specifications
| Parameter | Value |
|---|---|
| Accuracy Class | 2–4000A: 0.5 level; 5000–10000A: 1 level |
| Temperature Range | -40°C to +60°C |
| Relative Humidity | ≤95% at 35°C |
| Overload Capacity | 120% rated current for 2 hours |
| Voltage Drop Options | 50mV, 60mV, 70mV, 75mV, 100mV |
| Heat Generation | ≤50A: ≤80°C; >50A: ≤120°C |
Typical Applications
- Power supply systems
- Battery monitoring
- Solar energy systems
- Industrial automation
- Electric vehicles
To explore more options, visit our Current Shunt Resistor Catalog or DC Measurement Solutions Page.
How the 75mV Shunt Resistor Works
The 75mV precision shunt resistor is a low-value resistor designed to produce a small voltage drop proportional to the DC current flowing through it. This voltage (typically 75mV) is detected by a precision DC ammeter to ensure accurate current readings.
The resistor follows Ohm’s Law: V = I × R. For example:
- 100A × 0.75mΩ = 75mV
- 50A × 1.5mΩ = 75mV
Shunt Resistor Wiring Diagram
Wiring a 75mV shunt resistor correctly is essential for accuracy. Ensure that the voltage sense lines are connected to the dedicated terminals for minimal contact resistance. For reference diagrams and setup examples, refer to this article on EDN Network.
Shunt wiring diagram
