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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.

What are Shunt Resistors?

Shunt resistors are generally used to measure high currents with low levels of associated resistance. Shunting refers to diverting or following a force along a set path.

There are many occurrences where measurement of current will be required. Common applications include over-current protection, 4-20mA systems, battery charging, and H-bridge motor control.

Current Shunt 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
Wire Type

Browse the broad range of Shunts RS has to offer and order today for next day delivery.

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Stock information currently inaccessible Socomec Brass Ended Shunt, 200 A Max 100 mV, ±0.5 % Accuracy RS Stock No. 221-0274 Mfr. Part No. 192S2220 Subtotal (1 unit) CHF.75.94(exc. VAT) CHF.75.94/unit Units	Socomec	200A	Shunt	-	100 mV	Brass Ended	±0.5 %	-	-	-	-	-	RoHS
Stock information currently inaccessible Socomec Brass Ended Shunt, 2.5 kA Max 100 mV, ±0.5 % Accuracy RS Stock No. 221-0273 Mfr. Part No. 192S2165 Subtotal (1 unit) CHF.384.79(exc. VAT) CHF.384.79/unit Units	Socomec	2.5kA	Shunt	-	100 mV	Brass Ended	±0.5 %	-	-	-	-	-	RoHS
Stock information currently inaccessible Schneider Electric Shunt RS Stock No. 212-0192 Mfr. Part No. GV7AS207 Subtotal (1 unit) CHF.87.71(exc. VAT) CHF.87.71/unit Units	Schneider Electric	-	-	-	-	-	-	-	-	-	-	-	-
Stock information currently inaccessible GILGEN Muller & Weigert Plate Shunt, 25 A Max, 60mV Output, ±0.5 % Accuracy RS Stock No. 392-8406 Mfr. Part No. 1700V3170 Subtotal (1 unit) CHF.28.58(exc. VAT) CHF.28.58/unit Units	GILGEN Muller & Weigert	25 A	-	60mV	-	Plate	±0.5 %	-	-	-	-	-	-
Stock information currently inaccessible Sifam Tinsley Brass Ended Shunt, 5 A Max 75 mV, ±0.5 % Accuracy RS Stock No. 886-2061 Mfr. Part No. YN01-03751BS000000 Subtotal (1 unit) CHF.27.99(exc. VAT) CHF.27.99/unit Units	Sifam Tinsley	5A	Shunt	-	75 mV	Brass Ended	±0.5 %	-	-	-	-	-	No
Stock information currently inaccessible Socomec Plate Shunt, 10 A Max 100 mV, ±0.5 % Accuracy RS Stock No. 221-0271 Mfr. Part No. 192S2110 Subtotal (1 unit) CHF.50.37(exc. VAT) CHF.50.37/unit Units	Socomec	10A	Shunt	-	100 mV	Plate	±0.5 %	-	-	-	-	-	RoHS
Stock information currently inaccessible GILGEN Muller & Weigert Plate Shunt, 100 A Max, 60mV Output, ±0.5 % Accuracy RS Stock No. 392-8399 Mfr. Part No. 1700V3280 Subtotal (1 unit) CHF.26.00(exc. VAT) CHF.26.00/unit Units	GILGEN Muller & Weigert	100 A	-	60mV	-	Plate	±0.5 %	-	-	-	-	-	-
Stock information currently inaccessible Socomec Plate Shunt, 6 A Max 100 mV, ±0.5 % Accuracy RS Stock No. 221-0270 Mfr. Part No. 192S2106 Subtotal (1 unit) CHF.50.37(exc. VAT) CHF.50.37/unit Units	Socomec	6A	Shunt	-	100 mV	Plate	±0.5 %	-	-	-	-	-	RoHS
Stock information currently inaccessible Bourns Plate Shunt, 600 A Max 60 mV, 5 % Accuracy RS Stock No. 262-9138 Mfr. Part No. CSM2F-8518-L100J21 Subtotal (168 units, in boxes of 168) CHF.1'915.536(exc. VAT) CHF.11.402/unit Box(es)	Bourns	600A	Shunt	-	60 mV	Plate	5 %	-40°C	-	170°C	-	-	UL, ISO/TS 16949
Stock information currently inaccessible Bourns Plate Shunt, 1.414 kA Max 35 mV, 5 % Accuracy RS Stock No. 262-9140 Mfr. Part No. CSM2F-8536-L025J30 Subtotal (112 units, in boxes of 112) CHF.2'447.984(exc. VAT) CHF.21.857/unit Box(es)	Bourns	1.414kA	Shunt	-	35 mV	Plate	5 %	-40°C	-	170°C	-	-	ISO/TS 16949, UL
Stock information currently inaccessible Bourns Plate Shunt, 849 A Max 42 mV, 5 % Accuracy RS Stock No. 262-9134 Mfr. Part No. CSM2F-8518-L050J20 Subtotal (1 unit) CHF.19.70(exc. VAT) CHF.19.70/unit Units	Bourns	849A	Shunt	-	42 mV	Plate	5 %	-40°C	-	170°C	-	-	RoHS and AEC-Q200
Stock information currently inaccessible Socomec Plate Shunt, 300 A Max 100 mV RS Stock No. 253-3658 Mfr. Part No. 192S2230 Subtotal (1 unit) CHF.101.26(exc. VAT) CHF.101.26/unit Units	Socomec	300A	Shunt	-	100 mV	Plate	-	-	-	-	-	-	RoHS
Stock information currently inaccessible Murata Power Solutions Brass-Ended Shunt, 300 A Max, 50mV Output, ±0.25 % Accuracy RS Stock No. 823-3576 Mfr. Part No. 3020-01102-0 Subtotal (1 unit) CHF.30.19(exc. VAT) CHF.30.19/unit Units	Murata Power Solutions	300 A	-	50mV	-	Brass-Ended	±0.25 %	-	-40°C	-	60°C	-	-
Stock information currently inaccessible Bourns Plate Shunt, 1 kA Max 50 mV, 5 % Accuracy RS Stock No. 262-9144 Mfr. Part No. CSM2F-8536-L050J20 Subtotal (1 unit) CHF.42.47(exc. VAT) CHF.42.47/unit Units	Bourns	1kA	Shunt	-	50 mV	Plate	5 %	-40°C	-	170°C	-	-	UL, ISO/TS 16949
Stock information currently inaccessible Murata Power Solutions Brass-Ended Shunt, 100 A Max, 100mV Output, ±0.25 % Accuracy RS Stock No. 823-3589 Mfr. Part No. 3020-01108-0 Subtotal (1 unit) CHF.25.66(exc. VAT) CHF.25.66/unit Units	Murata Power Solutions	100 A	-	100mV	-	Brass-Ended	±0.25 %	-	-40°C	-	60°C	-	-
Stock information currently inaccessible Murata Power Solutions Brass-Ended Shunt, 500 A Max, 50mV Output, ±0.25 % Accuracy RS Stock No. 823-3570 Mfr. Part No. 3020-01103-0 Subtotal (1 unit) CHF.29.40(exc. VAT) CHF.29.40/unit Units	Murata Power Solutions	500 A	-	50mV	-	Brass-Ended	±0.25 %	-	-40°C	-	60°C	-	-
Stock information currently inaccessible Sifam Tinsley Brass Ended Shunt, 400 A Max 75 mV, ±0.5 % Accuracy Calibrated RS Stock No. 886-2095 Mfr. Part No. YN01-24751WS000000 Subtotal (1 unit) CHF.78.80(exc. VAT) CHF.78.80/unit Units	Sifam Tinsley	400A	Shunt	-	75 mV	Brass Ended	±0.5 %	-	-	-	-	Yes	No
Stock information currently inaccessible Bourns Plate Shunt, 600 A Max 60 mV, ±5 % Accuracy RS Stock No. 205-9742 Mfr. Part No. CSM2F-8518-L100J01 Subtotal (1 unit) CHF.18.90(exc. VAT) CHF.18.90/unit Units	Bourns	600A	Shunt	-	60 mV	Plate	±5 %	-40°C	-	170°C	-	-	No
Stock information currently inaccessible Bourns Plate Shunt, 849 A Max 42.4 mV, ±5 % Accuracy RS Stock No. 205-9746 Mfr. Part No. CSM2F-6918-L050J01 Subtotal (1 unit) CHF.23.06(exc. VAT) CHF.23.06/unit Units	Bourns	849A	Shunt	-	42.4 mV	Plate	±5 %	-40°C	-	170°C	-	-	No
Stock information currently inaccessible Bourns Plate Shunt, 1 kA Max 50 mV, ±5 % Accuracy RS Stock No. 205-9743 Mfr. Part No. CSM2F-7036-L050J01 Subtotal (50 units, in packs of 50) CHF.1'137.65(exc. VAT) CHF.22.753/unit Pack(s)	Bourns	1kA	Shunt	-	50 mV	Plate	±5 %	-40°C	-	170°C	-	-	No