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. Learn more with our handy shunt resistors guide.

How does a shunt work?

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 applications

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.

Types of shunts

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庫存編號 501-310
製造零件編號34330A
TWD6,018.00
單位
30 A - - - - - L4411A Series, 3458A Series, 34401A Series, 34405A Series, 34410A Series, 34411A Series -
RS庫存編號 810-3261
製造零件編號3020-01097-0
TWD759.00
單位
5 A 50mV Digital ±0.25 % -40°C +60°C - -
RS庫存編號 313-788
製造零件編號SHR100A75
BrandHOBUT
TWD1,475.00
單位
100 A 75mV Brass-Ended ±1 % - - - -
RS庫存編號 810-3270
製造零件編號3020-01098-0
TWD712.00
單位
20 A 50mV Digital ±0.25 % -40°C +60°C - -
RS庫存編號 886-2067
製造零件編號YN01-02751BS000000
TWD1,065.00
單位
2 A 75mV Brass-Ended - - - Ammeter Kappa
RS庫存編號 257-408
製造零件編號SHR20A200
BrandHOBUT
TWD477.00
單位
20 A 200mV - ±1 % - - - -
全新
RS庫存編號 230-7874
製造零件編號3020-01107-0
BrandMurata
TWD686.80
個 (以毎盒:5)
單位
10 A 100mV Digital ±25 % - - - -
RS庫存編號 205-9746
製造零件編號CSM2F-6918-L050J01
BrandBourns
TWD405.00
單位
849 A 42.4mV Plate 5 % - - - -
RS庫存編號 392-8412
製造零件編號1700V3200
TWD949.00
單位
40 A 60mV Plate ±0.5 % - - - -
RS庫存編號 313-930
製造零件編號SHR60A60
BrandHOBUT
TWD1,606.00
單位
60 A 60mV Brass-Ended ±1 % - - - -
RS庫存編號 252-0859
製造零件編號P01165223
TWD6,292.00
單位
10 A 100mV Plate - - - - P011
RS庫存編號 886-2073
製造零件編號YN01-07751BS000000
TWD1,065.00
單位
25 A 75mV Brass-Ended - - - Ammeter Kappa
RS庫存編號 205-9742
製造零件編號CSM2F-8518-L100J01
BrandBourns
TWD784.00
單位
600 A 60mV Plate 5 % - - - -
RS庫存編號 257-313
製造零件編號SHR30MA75
BrandHOBUT
TWD376.00
單位
30 mA 75mV Plate ±1.5 % - - - -
全新
RS庫存編號 221-0270
製造零件編號192S2106
BrandSocomec
TWD1,867.00
單位
6 A 100mV Plate - - - - -
RS庫存編號 257-391
製造零件編號SHR2A200
BrandHOBUT
TWD376.00
單位
2 A 200mV - ±1 % - - - -
RS庫存編號 823-3589
製造零件編號3020-01108-0
TWD725.00
單位
100 A 100mV Brass-Ended ±0.25 % -40°C 60°C - -
RS庫存編號 205-9745
製造零件編號CSM2F-6918-L050J01
BrandBourns
TWD416.50
/個 (每包:50個)
單位
849 A 42.4mV Plate 5 % - - - -
RS庫存編號 810-3267
製造零件編號3020-01096-0
TWD759.00
單位
50 A 50mV Digital ±0.25 % -40°C +60°C - -
RS庫存編號 313-794
製造零件編號SHR300A75
BrandHOBUT
TWD2,469.00
單位
300 A 75mV Brass-Ended ±1 % -20°C +40°C - -