RSR Series High Amperage Shunt Resistors
Precision shunt resistor for large-current measurement in power converters and metering instruments
Rated current range 10A to 10,000A across five model variants (RSR-1 through RSR-5)
Rated voltage drop 50mV standard, with 60mV and 100mV options available
Accuracy class standard 3.0%, with tighter options of 1.0%, 0.5%, and 0.2% or 0.1% available on request
Tolerance options ±0.5%, ±1%, and ±5%
TCR options of 30, 50, and 100 ppm/°C
Operating temperature range −55°C to +70°C
CE certified — suitable for export and industrial compliance applications
Direct bus-bar mounting with flexible wire connections to metering instruments
What are the RSR Series High Amperage Shunt Resistors?
The RSR is a large-current shunt resistor designed for accurate current measurement in power conversion equipment and precision metering instruments. Built for direct attachment to current bus bars, the RSR provides a stable, low-resistance current path whose voltage drop can be measured by a connected ammeter or monitoring circuit. This architecture simplifies installation and eliminates the need for external current transformers in many industrial applications. The series carries CE certification, confirming conformity with applicable European safety and electromagnetic compatibility directives.
The RSR range is organised into five model variants — RSR-1 through RSR-5 — covering rated currents from 10A up to 10,000A in a single coherent product family. The lightest variant weighs approximately 100g, while the heaviest RSR-5 reaches 13kg, reflecting the physical scale required to handle kilowatt-level continuous dissipation. An extended range beyond 4,000A up to 15,000A is available on request. Weight increases progressively with rated current, from 100g for RSR-1 to 13kg for the standard RSR-5, with correspondingly larger mechanical footprints.
The standard rated voltage drop across the shunt element is 50mV, with a 60mV variant available as a separate order option and a 100mV variant offered as a selectable option. This standardised output signal allows direct compatibility with panel-mounted ammeters and digital measurement systems designed for millivolt-range current sense inputs. Accuracy is rated at 3.0% as standard, with improved grades of 1.0% and 0.5% available to order, and precision grades of 0.2% and 0.1% offered for calibration-grade applications. Temperature coefficient of resistance is available in three grades — 30, 50, and 100 ppm/°C — enabling specifiers to match the resistor’s thermal stability to the accuracy class required by the installation.
The operating temperature range spans −55°C to +70°C, covering the ambient conditions found in outdoor substations, industrial enclosures, and transportation power systems alike. Tolerance options of ±0.5%, ±1%, and ±5% complement the accuracy grades and allow the RSR to be specified economically for applications ranging from utility revenue metering to general-purpose panel instrumentation.
RSR Series High Amperage Shunt Resistors Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: RSR
Resistor type: Current Sensing
Description: CE shunt
Rated Current: 10A~10,000A
Supply Voltage: 50mV, 75mV, 100mV
Tolerance (%): ±0.5, ±1, ±5
TCR (ppm/C): 30, 50, 100
Applications of the RSR Series High Amperage Shunt Resistors
Where RARA current sensing resistors are deployed in the field.
Power converters and variable-speed drive systems requiring bus-bar current measurement without transformer isolation.
Precision ampere-meters and panel instrumentation in industrial switchgear and MCC assemblies.
Utility revenue metering and energy management systems requiring calibration-grade current measurement.
Substation and distribution equipment monitoring in outdoor and controlled environments.
Battery management systems and energy storage installations measuring charge and discharge currents.
DC power supplies and rectifier systems in electrochemical processing and plating facilities. Electric vehicle charging infrastructure and on-board power monitoring.
Renewable energy inverters and grid-tie converters requiring continuous current supervision. Test benches and laboratory measurement setups demanding traceable, low-TCR shunt standards.
Heavy industrial equipment including crane drives, rolling mill drives, and smelting furnace power systems where kilowatt-scale currents must be metered reliably.
Related Products of the RSR Series High Amperage Shunt Resistors
Model: FL-2C100
Resistor type: Current Sensing
Description: High amperage shunt
Rated Current: 10A~100A
Supply Voltage: 75mV
Tolerance (%): ±0.5
TCR (ppm/C): 40 max.
Model: FL-2C750
Resistor type: Current Sensing
Description: High amperage shunt
Rated Current: 10A~750A
Supply Voltage: 75mV
Tolerance (%): ±0.5
TCR (ppm/C): 40 max.
Model: SH-L
Resistor type: Current sensing
Description: High amperage shunt
Rated Current: 1A~2500A
Resistance (Ω): 0.2m~16m
Tolerance (%): ±0.5, ±1, ±5
TCR (ppm/C): 50, 100
Model: SH-Fm
Resistor type: Current sensing
Description: High amperage shunt
Rated Current: 1A~2500A max.
Resistance (Ω): 0.2m~16m
Tolerance (%): ±0.1, ±1, ±5
TCR (ppm/C): 50, 100
Why Choose RARA Current Sensing Resistors
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
8 Sub-Categories
No other single supplier covers AEC-Q200 chip shunts, milliohm precision types, four-terminal Kelvin shunts, power metering, and 12,000A panel shunts under one ISO-certified roof.
02
Extreme Precision
HPS, UHPS, and PSS precision shunts deliver ±0.05% tolerance and 3 ppm/°C TCR — meeting the accuracy demands of EV battery coulomb counting, precision power analyzers, and billing-grade energy metering.
03
Automotive Qualified
Multiple AEC-Q200 certified models (BCS, LRA, ECS, BWR, TCS, PCBS) with IATF 16949 manufacturing certification — covering EV battery management, motor control, and charging applications.
04
Global Track Record
Trusted by Tesla, GM Korea, Proterra, Siemens, Rockwell, and Schneider Electric — deployed in EV powertrains, industrial drives, and utility metering systems across six continents.
