Off-Board
Our official sales partner: Shivalik Bimetal Controls Ltd.
Shivalik Bimetal Controls Ltd. specializes in bonding materials through processes such as diffusion bonding, cladding, electron beam bonding, soldering and resistance welding and offers a wide range of products for various industries.
Through this partnership, we can offer our customers access to a wide range of state-of-the-art technologies and products - from current sense resistors (also known as shunt resistors) for efficient energy measurement to customized solutions for industrial applications and consumer electronics.
Through this partnership, we can offer our customers access to a wide range of state-of-the-art technologies and products - from current sense resistors (also known as shunt resistors) for efficient energy measurement to customized solutions for industrial applications and consumer electronics.
Product range of our off-board current sense
Our off-board current sense resistors from Shivalik Bimetal Controls Ltd. are the ideal solution for applications with high currents and demanding environmental conditions. Their excellent heat dissipation, low power losses and high resistance stability ensure reliable and efficient current measurement.
Below you will find an overview of our products with detailed specifications and data sheets to help you find the right solution for your requirements.
Below you will find an overview of our products with detailed specifications and data sheets to help you find the right solution for your requirements.
Off-Board
| Resistance | 0,05-0,1 - 0.2 mΩ, 0,1 mΩ, 0,05 - 0.1 mΩ, 0,04 - 1 mΩ, 0,5 mΩ. 0.05 mΩ. 0.1 mΩ, 0,03 - 0.100 mΩ |
| Size | 3515-7036, 8420/8518 |
| Power | 3-36 W, 36 - 7 W |
| Resistance Tolerance | 5%, 5%, 10% (+/-10% for 0.025 mΩ) |
Off-board current measuring resistors for industrial applications
Buy off-board shunt resistors
- High efficiency - Minimizes energy losses
- Less heat - Longer service life
- Wide range of applications - current monitoring in electronics and industry
- Reliable - Quality from Rotima & Shivalik
Customized off-board shunt modules - development with Rotima
Rotima offers you the opportunity to jointly develop customized shunt modules that are optimally tailored to your specific requirements. Thanks to our expertise in working with leading suppliers and our experience in the field of precision components, we develop individual solutions for a wide range of applications, for example in the power supply, measurement technology and automotive industries.
Our development processes are geared towards precisely meeting technical requirements such as resistance value, tolerances, thermal load capacity and design. By working closely with our customers, we guarantee reliable and efficient implementation of your projects.
Contact us to find out more about the development of customized shunt modules and to design innovative solutions for your challenges together.
Our development processes are geared towards precisely meeting technical requirements such as resistance value, tolerances, thermal load capacity and design. By working closely with our customers, we guarantee reliable and efficient implementation of your projects.
Contact us to find out more about the development of customized shunt modules and to design innovative solutions for your challenges together.
Do you have any questions about our offer?
Off-Board
Current measuring resistor
Off-Board
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Off-Board
Off-board shunt modules - for current measurement
Off-board shunt modules enable precise and reliable current measurement in high-current systems by recording the voltage drop with minimal power losses. Their optimized design with excellent heat dissipation makes them ideal for demanding industrial and automotive applications.
Thanks to electron beam welded resistor alloys and high-quality copper connections, these modules offer extreme long-term stability and low temperature drift. This ensures that precise measurement accuracy is maintained even with high currents and changing environmental conditions.
Off-board shunt modules are particularly suitable for high-performance energy measurement systems, industrial control systems and battery storage solutions. Thanks to the possibility of customer-specific adaptation in terms of resistance value, geometry and thermal load capacity, they offer maximum flexibility for a wide range of applications.
Thanks to electron beam welded resistor alloys and high-quality copper connections, these modules offer extreme long-term stability and low temperature drift. This ensures that precise measurement accuracy is maintained even with high currents and changing environmental conditions.
Off-board shunt modules are particularly suitable for high-performance energy measurement systems, industrial control systems and battery storage solutions. Thanks to the possibility of customer-specific adaptation in terms of resistance value, geometry and thermal load capacity, they offer maximum flexibility for a wide range of applications.
Our range of other current measuring resistors:
On-Board
The on-board shunt resistors from Shivalik Bimetal Controls Ltd. are characterized by maximum measurement accuracy and minimal energy loss. The electron beam welded technology and excellent heat dissipation make them ideal for applications in battery management systems (BMS), intelligent battery systems (IBS) and energy measurement systems.
Do you have any questions about our offer?
Off-Board
Design and function of off-board current measuring resistors
An off-board current measuring resistor is an external resistor that reliably measures high currents. It is placed outside the actual circuit to effectively dissipate heat and improve measurement accuracy. Thanks to its special design with precise resistor elements made of copper and resistance alloys, it delivers stable measurement results, even under high loads.
During measurement, a small voltage is generated that is proportional to the flowing current. This can be evaluated to determine the exact current. An off-board current measuring resistor is often used in energy management systems, industrial systems or high-performance batteries.
Rotima AG offers customized solutions for various applications. Our resistors are characterized by durable materials and precise manufacturing. An off-board current measuring resistor ensures reliable, accurate current monitoring and helps to increase the efficiency of your systems.
During measurement, a small voltage is generated that is proportional to the flowing current. This can be evaluated to determine the exact current. An off-board current measuring resistor is often used in energy management systems, industrial systems or high-performance batteries.
Rotima AG offers customized solutions for various applications. Our resistors are characterized by durable materials and precise manufacturing. An off-board current measuring resistor ensures reliable, accurate current monitoring and helps to increase the efficiency of your systems.
What can we do for you?
Contact our product experts
What can we do for you?
Contact our product experts
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Off-Board
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Further information on off-board current sense resistors
Here you will find comprehensive answers to the most important aspects of off-board current sense resistors. Whether it's functionality, advantages, areas of application or product selection - our FAQ section will help you to find the optimum solution for your requirements. If you have any further questions, please do not hesitate to contact us personally.
How does an off-board shunt resistor differ from an on-board shunt resistor?
The main difference between off-board and on-board shunt resistors lies in their design and area of application. On-board shunt resistors are mounted directly on the circuit board of a system and enable compact and integrated current measurement. They are often used in applications with medium to low currents, for example in battery management systems (BMS), switching power supplies and automotive controls, where a space-saving and thermally optimized solution is required.
Off-board shunt resistors, on the other hand, are positioned as separate modules outside the main circuit and are specially designed for high-current applications. They enable better heat dissipation as they are not directly integrated into the board layout and can use larger heat sinks or housings. These resistors are often found in high-performance energy measurement systems, battery storage solutions and industrial control systems where high currents need to be detected with maximum precision.
Another difference lies in the mechanical load capacity and the possible resistance values. While on-board shunt resistors often have very low resistance values in the milliohm range in order to minimize power losses, off-board variants offer larger designs that are designed for extremely high currents. Their more robust design and better cooling options make them particularly suitable for continuous operation in high-performance applications.
Off-board shunt resistors, on the other hand, are positioned as separate modules outside the main circuit and are specially designed for high-current applications. They enable better heat dissipation as they are not directly integrated into the board layout and can use larger heat sinks or housings. These resistors are often found in high-performance energy measurement systems, battery storage solutions and industrial control systems where high currents need to be detected with maximum precision.
Another difference lies in the mechanical load capacity and the possible resistance values. While on-board shunt resistors often have very low resistance values in the milliohm range in order to minimize power losses, off-board variants offer larger designs that are designed for extremely high currents. Their more robust design and better cooling options make them particularly suitable for continuous operation in high-performance applications.
What materials and manufacturing techniques are used for off-board current sense resistors?
Off-boardshunt resistors are made of specialized resistor alloys that are characterized by high temperature resistance, low resistance tolerance and minimal thermal drift. The most commonly used materials include manganin (copper-manganese-nickel alloy), nichrome (nickel-chromium) and special stainless steel compounds. These materials offer high long-term stability, as the resistance value hardly changes even with temperature changes.
The manufacturing techniques for high-precision off-board shunts include electron beam welding, diffusion bonding and laser cutting. Electron beam welding bonds copper to the resistor alloy to create an extremely strong and durable joint. This technique reduces the formation of unwanted thermoelectric effects (thermo-EMF) that could affect measurement accuracy. Diffusion bonding ensures a uniform material structure, minimizing micro-cracks and resistance variations.
In addition, many off-board shunts are providedwith protective coatings or passivated surfaces to prevent corrosion and oxidation. Especially in demanding environments, such as industrial plants or automotive applications, this is crucial for long-term functionality. Through this combination of high-quality materials and advanced manufacturing techniques, off-board shunts offer exceptional precision, reliability and resilience for high-current applications.
The manufacturing techniques for high-precision off-board shunts include electron beam welding, diffusion bonding and laser cutting. Electron beam welding bonds copper to the resistor alloy to create an extremely strong and durable joint. This technique reduces the formation of unwanted thermoelectric effects (thermo-EMF) that could affect measurement accuracy. Diffusion bonding ensures a uniform material structure, minimizing micro-cracks and resistance variations.
In addition, many off-board shunts are providedwith protective coatings or passivated surfaces to prevent corrosion and oxidation. Especially in demanding environments, such as industrial plants or automotive applications, this is crucial for long-term functionality. Through this combination of high-quality materials and advanced manufacturing techniques, off-board shunts offer exceptional precision, reliability and resilience for high-current applications.
How do temperature management and heat dissipation affect the performance of an off-board shunt resistor?
Heat generation is a critical factor in off-board shunt resistors, as high currents can lead to considerable self-heating. Without effective heat dissipation, this can lead to measurement inaccuracies, resistance drift and premature material fatigue. Off-board shunts are therefore designed to enable optimum heat dissipation, for example through larger designs, special housings or direct mounting on heat sinks.
A crucial aspect of temperature management is the selection of a resistor material with a low temperature coefficient of resistance (TCR). Materials such as manganin or nichrome have a naturally low change in resistance with temperature fluctuations, which leads to greater long-term stability. In addition, heat dissipation can be further improved by a targeted layout design and the placement of the shunt in a well-ventilated or cooled location.
Some off-board shunt resistors are also equipped with special cooling technologies such as metal cooling plates or integrated heat spreaders to reduce the thermal load. In applications with very high currents, the combination of a low resistance value, an optimized design and additional cooling measures can be crucial to ensure consistently precise current measurement and a long service life of the component.
A crucial aspect of temperature management is the selection of a resistor material with a low temperature coefficient of resistance (TCR). Materials such as manganin or nichrome have a naturally low change in resistance with temperature fluctuations, which leads to greater long-term stability. In addition, heat dissipation can be further improved by a targeted layout design and the placement of the shunt in a well-ventilated or cooled location.
Some off-board shunt resistors are also equipped with special cooling technologies such as metal cooling plates or integrated heat spreaders to reduce the thermal load. In applications with very high currents, the combination of a low resistance value, an optimized design and additional cooling measures can be crucial to ensure consistently precise current measurement and a long service life of the component.
Which applications require off-board current measuring resistors with high load capacity and precision?
Off-board current measuring resistors are essential for applications where high currents need to be measured with maximum precision. A classic area of application is energy management and smart grid systems, in which shunts are used to measure power in high-voltage grids or battery storage solutions. Here, they enable precise monitoring of the power flow and contribute to increasing the efficiency and safety of power grids.
Another important field of application is the automotive industry, particularly for electric vehicles (EVs) and hybrid vehicles. Off-board shunts are used in battery management systems (BMS), high-performance inverters and charging stations to accurately monitor charging and discharging currents. Precise current measurement is crucial for optimizing battery efficiency, range control and protection against overloads or short circuits.
Off-board shunt resistors also play a key role in industrial control and drive systems. High-precision shunts are used in motor controllers, generators and uninterruptible power supply (UPS) systems to measure high currents with minimal power losses. Due to their excellent heat dissipation and extreme load capacity, they ensure a reliable and durable solution for high-current applications.
Another important field of application is the automotive industry, particularly for electric vehicles (EVs) and hybrid vehicles. Off-board shunts are used in battery management systems (BMS), high-performance inverters and charging stations to accurately monitor charging and discharging currents. Precise current measurement is crucial for optimizing battery efficiency, range control and protection against overloads or short circuits.
Off-board shunt resistors also play a key role in industrial control and drive systems. High-precision shunts are used in motor controllers, generators and uninterruptible power supply (UPS) systems to measure high currents with minimal power losses. Due to their excellent heat dissipation and extreme load capacity, they ensure a reliable and durable solution for high-current applications.
