SH-L Series High Amperage Shunt Resistors
Interchangeable shunt resistor designed to multiply the current measurement range of ammeters and precision instruments
Resistance range 0.2mΩ to 16mΩ
Rated current range 1A to 2500A
Rated voltage drop options of 25mV, 50mV, 60mV, 75mV, and 100mV
Tolerance options ±0.5%, ±1%, and ±5%
TCR options of 50 and 100 ppm/°C
Operating ambient temperature −25°C to +40°C, relative humidity ≤80% at 35°C
Scalable physical construction across seven current sub-ranges from 1A through to 2500A
What are the SH-L Series High Amperage Shunt Resistors?
The SH-L is an interchangeable panel-mount shunt resistor built for current measurement range extension in instruments and metering systems. Like all shunt resistors in this product family, the SH-L operates by inserting a precision low-resistance element into the current path and measuring the millivolt-scale voltage drop that develops across it, allowing a connected ammeter or digital monitor to derive the actual current flowing through the circuit. The interchangeable format means that a single instrument can be reconfigured for different current ranges simply by substituting the appropriate shunt, making the SH-L particularly practical in multi-range panel installations and calibration environments.
The SH-L covers a rated current range of 1A to 2500A, with the resistance value selected to produce a standardised output voltage of 25mV, 50mV, 60mV, 75mV, or 100mV at full rated current. This results in a resistance range spanning 0.2mΩ to 16mΩ across the series. The physical dimensions of the SH-L scale progressively with rated current and voltage drop, reflecting the increasing thermal mass and conductor cross-section required at higher power levels. At the lighter end, 1A to 125A models have body lengths between 135mm and 175mm depending on the voltage drop variant. Mid-range models from 400A to 600A use shorter, wider bodies with lengths from 87mm to 126mm and conductor widths from 20mm to 40mm. The heaviest variants rated at 2000A and 2500A have overall lengths up to 184mm with terminal spacings to match large bus-bar installations.
Tolerance grades of ±0.5%, ±1%, and ±5% allow the SH-L to serve applications from precision revenue metering through to general-purpose panel indication. The two available TCR grades of 50 ppm/°C and 100 ppm/°C give specifiers control over measurement drift with temperature, with the tighter grade appropriate where ambient temperature variation is significant or where accuracy must be maintained over a wide operating envelope. The rated ambient condition of −25°C to +40°C with relative humidity up to 80% at 35°C covers the range of indoor industrial, transport, and telecommunications environments where the SH-L is commonly deployed.
SH-L Series High Amperage Shunt Resistors Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
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
Applications of the SH-L Series High Amperage Shunt Resistors
Where RARA current sensing resistors are deployed in the field.
Telecommunications power equipment requiring accurate DC bus current monitoring in rectifier, battery float, and backup discharge systems.
Electric vehicle drivetrains, battery management systems, and on-board chargers where compact, accurate current sensing is needed across wide current ranges.
Aerospace power distribution panels and ground support equipment requiring interchangeable, lightweight shunt standards.
Electric vehicle charging stations and charging infrastructure monitoring output currents for billing accuracy, load management, and protection.
Electroplating and electrolytic processing power supplies where stable large DC currents must be measured reliably over extended production cycles.
Industrial panel meters and multi-range ammeters where interchangeable shunts allow a single instrument head to cover multiple current scales without recalibration.
DC power systems in data centres, telecommunications exchanges, and distributed energy storage installations requiring continuous current supervision.
Industrial automation, motor control centres, and process plant electrical systems where motor and feeder currents must be monitored for energy management and fault detection.
Renewable energy inverters, grid-tie converters, and battery energy storage systems requiring continuous DC current measurement at the bus level.
Related Products of the SH-L 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: 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
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.
