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FL-CG2 | 300A 75mV DC Shunt Resistor for Ammeter
The FL-CG2 300A 75mV DC shunt resistor for ammeter is designed for accurate current measurement in DC circuits, ideal for use with voltmeters, ammeters, and energy monitoring systems. Manufactured with high-conductivity brass terminals and a manganin resistance strip, this shunt provides stable performance with minimal temperature drift.
ELEHUB’s FL-CG2 series is built to meet demanding industrial requirements, offering 0.2% or 0.5% precision for applications like EV charging, solar systems, and battery monitoring. If you’re seeking a reliable 300A 75mV DC ammeter shunt resistor, this model delivers dependable long-term results.
Specifications
| Specification | DATA |
|---|---|
| Model: | FL-CG2 |
| Current: | 75-200A, 250-300A, 400-1000A |
| Voltage Drop: | 50mV, 60mV, 75mV |
| Material: | Brass & Manganin |
| Accuracy class: | 0.5%, 0.2% |
| Main Application: | Voltage meter, ammeters, and energy monitoring systems |
Dimension Drawing
Applications
The FL-CG2 series shunt resistor for ammeter is suitable for multiple DC current-sensing environments, especially where consistent voltage drop and accuracy are essential:
EV Battery Monitoring
Tracks high-current flow to protect EV battery systems
EV Charging Stations
Measures DC current accurately during vehicle charging
UPS Systems
Monitors battery charge/discharge rates for uninterrupted power
Solar Inverter Systems
Used to monitor current from PV panels to inverter inputs
Industrial Automation Equipment
Supports current control in production lines
Marine Electric Systems
Assists in DC power monitoring for marine propulsion
Why Choose Us as a Shunt Resistor Supplier?
Precision-Engineered for Reliability
We manufacture DC shunt resistors using premium-grade manganin and brass, ensuring high conductivity, thermal stability, and long-term measurement accuracy.
Factory Direct Supply
As an experienced factory exporter, we control cost and quality from raw material to final testing — offering competitive pricing without middlemen.
Customization Services Available
Need different terminals, mounting holes, or ratings? We offer OEM/ODM customization to suit your application — whether it’s EV charging, solar, or automation.
Global Export Experience
We serve OEMs and distributors in Europe, North America, Southeast Asia, and the Middle East, ensuring smooth customs processes and compliance with international standards.
Technical Support for Integration
Our engineering team provides full technical support for product selection, installation guidance, and current sensing integration in your system.
Trusted by Leading Industrial Clients
Our DC components are used in EV infrastructure, renewable energy systems, and automation panels, backed by real-world performance and satisfied clients worldwide.
FAQs
What does a 300A 75mV DC shunt resistor do?
It measures current by producing a small, known voltage drop (75mV) across the resistor when 300A current flows through it. This drop can be read by a meter to calculate current.
Can I use this DC ammeter shunt with a digital meter？
Yes, the FL-CG2 is compatible with both digital and analog meters for current monitoring in DC systems.
Is the shunt resistor heat-resistant?
Yes. Manganin provides strong thermal resistance, and the brass terminals allow safe dissipation in high-current environments.
Can this be customized to other current levels?
Yes. The FL-CG2 model is available in ratings from 75A to 1000A and voltage drops of 50mV or 75mV depending on your needs.
How do shunt resistors improve measurement accuracy?
Shunt resistors improve measurement accuracy by providing a precise, low-resistance path for current, producing a proportional voltage drop that allows voltmeters or ammeters to measure DC current reliably.
Read our article: “Shunt Resistor Current Measurement for Accurate Results” to understand the detailed principles and best practices.
What material is used for the resistor element?
The core resistive element is made of manganin, a material known for low thermal EMF and excellent long-term stability.
How should I install the shunt resistor for ammeter?
It should be mounted securely to a heat-dissipating surface, connected in series with the current path, and wired to the voltage-measuring device.
Is this shunt suitable for EV or solar applications?
Absolutely. It’s widely used in EV charging stations, solar inverters, battery packs, and DC control systems due to its accuracy and durability.
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