FL-2 DC Ammeter Shunt 75mV 0.5% Accuracy 5A–50A
FL-2 DC Ammeter Shunt 75mV 0.5% Accuracy 5A–50A
FL-2 DC Ammeter Shunt — 75mV, 0.5% Accuracy, 5A to 50A
The FL-2 DC Shunt is a precision current-measurement resistor designed for use with DC ammeters and energy monitors. By dropping exactly 75mV at full rated current, it provides a stable, highly accurate signal for panel meters, data loggers, and monitoring systems. With a class 0.5% accuracy, it delivers reliable readings across a wide range of DC current applications — from small solar arrays and battery banks to motor control panels and industrial equipment.
Key Features
- Rated Current Range: Available in 5A, 10A, 15A, 20A, 30A, and 50A versions
- Output Voltage Drop: 75mV at full rated current
- Accuracy Class: 0.5% — suitable for precise current monitoring
- Type: FL-2 (FL2) standard DC shunt resistor
- Compatible With: DC ammeters, panel meters, energy meters, and data acquisition systems
- Construction: Low-resistance alloy element with sturdy terminal connectors
- Application: Solar power systems, battery charge monitoring, industrial panels, and automotive electrical systems
Specifications
| Model | FL-2 (FL2) |
| Rated Current | 5A / 10A / 15A / 20A / 30A / 50A |
| Rated Voltage Drop | 75mV |
| Accuracy Class | 0.5% |
| Country of Origin | Made in Mainland China |
How a DC Shunt Works
A DC shunt is a precision low-resistance component connected in series with a circuit. As current flows through it, a small, proportional voltage drop is produced across the shunt terminals (75mV at full rated current). A connected ammeter or meter module reads this voltage and displays it as the corresponding current value — providing non-invasive, accurate current measurement without interrupting your circuit significantly.
For further reading on electrical measurement standards and safe wiring practices, visit the OSHA Electrical Safety resource.
Frequently Asked Questions
Q: What is an FL-2 DC shunt and how does it differ from a current transformer?
A: An FL-2 DC shunt is a precision resistor placed in series in a DC circuit. Unlike a current transformer (which only works with AC), a DC shunt works with direct current by generating a small, proportional millivolt signal (75mV at full load) that a panel meter reads as the actual current. It is the standard method for DC current measurement in solar, battery, and industrial systems.
Q: Which ammeter or panel meter is compatible with this FL-2 shunt?
A: This shunt is compatible with any DC ammeter or panel meter designed for a 75mV shunt input — a very common standard. Simply select the meter rated for "75mV external shunt" and pair it with the FL-2 shunt matching your maximum circuit current (e.g., 50A shunt + 50A/75mV meter).
Q: Can I use this shunt for solar panel or battery monitoring?
A: Yes. The FL-2 DC shunt is widely used in solar charge monitoring, battery bank systems, and off-grid setups. Select the shunt rating that meets or slightly exceeds your expected maximum current for accurate and safe operation.
Q: What accuracy can I expect from the FL-2 shunt?
A: The FL-2 shunt is rated at accuracy class 0.5%, meaning the measurement error is within ±0.5% of the full-scale rated current. This level of precision is suitable for most industrial, commercial, and hobbyist DC monitoring applications.