Shunts

A shunt is a precision resistor connected in parallel across a device which is used to measure both alternating and direct current by creating a low-resistance path. Also known as an ammeter shunt or a current shunt resistor, a shunts low resistance creates only a small amount of voltage drop by using little energy in the process. By using Ohms Law equation, the voltage across the shunt is measured and used to calculate the current flow in amperes. A resistor of accurately known resistance (usually a manganin resistor) is placed in parallel with the ammeter. The current is then divided so that only a small amount travels through the ammeter and the actual amperage can be directly measured. Shunts are diverse and capable of many uses within many different applications. One of the uses of a shunt is within a renewable energy system such as wind turbines or solar panels. They are used to measure how much current is flowing in and out of the battery, or for knowing how much power is being generated. If high frequency noise is an issue, a shunt with a capacitor can be used to redirect noise sending it to the ground before the signal reaches the circuit elements. They can be installed within a DC disconnect enclosure with a negative conductor between the batteries and the inverter. Some systems also have multiple shunts when several inputs and outputs require monitoring. Shunts can be used for overload protection in control devices such as battery chargers and power supplies. They can also be used in digital meters and coil panel meters for measuring current in DC. There are several different types of shunts such as, standard brass ended, compact brass ended, digital, plate type and wire type.

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Description Price Maximum Current Voltage Output Shunt Type Accuracy Minimum Temperature Maximum Temperature For Use With Series
RS Stock No. 257-408
Mfr. Part No.SHR20A200
BrandHOBUT
TWD474.00
Each
units
20 A 200mV - ±1 % - - - -
RS Stock No. 810-3261
Mfr. Part No.3020-01097-0
TWD774.00
Each
units
5 A 50mV Digital ±0.25 % -40°C +60°C - -
RS Stock No. 886-2067
Mfr. Part No.YN01-02751BS000000
TWD1,059.00
Each
units
2 A 75mV Brass-Ended - - - Ammeter Kappa
RS Stock No. 313-788
Mfr. Part No.SHR100A75
BrandHOBUT
TWD1,467.00
Each
units
100 A 75mV Brass-Ended ±1 % - - - -
RS Stock No. 810-3270
Mfr. Part No.3020-01098-0
TWD684.00
Each
units
20 A 50mV Digital ±0.25 % -40°C +60°C - -
RS Stock No. 810-3277
Mfr. Part No.3020-01101-0
TWD994.00
Each
units
200 A 50mV Digital ±0.25 % -40°C +60°C - -
RS Stock No. 257-313
Mfr. Part No.SHR30MA75
BrandHOBUT
TWD374.00
Each
units
30 mA 75mV Plate ±1.5 % - - - -
RS Stock No. 257-341
Mfr. Part No.SHR1A75
BrandHOBUT
TWD374.00
Each
units
1 A 75mV Plate ±1.5 % - - - -
RS Stock No. 886-2089
Mfr. Part No.YN01-17751WS000000
TWD1,593.00
Each
units
100 A 75mV Brass-Ended - - - Ammeter Kappa
RS Stock No. 886-2083
Mfr. Part No.YN01-19751WS000000
TWD1,593.00
Each
units
150 A 75mV Brass-Ended - - - Ammeter Kappa
RS Stock No. 257-329
Mfr. Part No.SHR100MA75
BrandHOBUT
TWD374.00
Each
units
100 mA 75mV Plate ±1.5 % - - - -
RS Stock No. 886-2092
Mfr. Part No.YN01-22751WS000000
TWD2,785.00
Each
units
250 A 75mV Brass-Ended - - - Ammeter Kappa
RS Stock No. 886-2061
Mfr. Part No.YN01-03751BS000000
TWD1,059.00
Each
units
5 A 75mV Brass-Ended - - - Ammeter Kappa
RS Stock No. 257-363
Mfr. Part No.SHR10A75
BrandHOBUT
TWD474.00
Each
units
10 A 75mV Plate ±1.5 % - - - -
RS Stock No. 257-307
Mfr. Part No.SHR10MA75
BrandHOBUT
TWD374.00
Each
units
10 mA 75mV Plate ±1.5 % - - - -
RS Stock No. 886-2086
Mfr. Part No.YN01-12751WS000000
TWD1,593.00
Each
units
60 A 75mV Brass-Ended - - - Ammeter Kappa
RS Stock No. 257-335
Mfr. Part No.SHR300MA75
BrandHOBUT
TWD374.00
Each
units
300 mA 75mV Plate ±1.5 % - - - -
RS Stock No. 886-2073
Mfr. Part No.YN01-07751BS000000
TWD1,059.00
Each
units
25 A 75mV Brass-Ended - - - Ammeter Kappa
RS Stock No. 252-0859
Mfr. Part No.P01165223
TWD4,917.00
Each
units
10 A 100mV Plate - - - - P011
RS Stock No. 257-379
Mfr. Part No.SHR20MA200
BrandHOBUT
TWD374.00
Each
units
20 mA 200mV - ±1 % - - - -