Current Sensors

A current sensor is a device that detects and converts current to an easily measurable output voltage, which is proportional to the current through the measured path. There are a wide variety of sensors, and each sensor is suitable for a specific current range and environmental condition. Among these sensors, a current sensing resistor is the most commonly used. It can be considered a current-to-voltage converter, where inserting a resistor into the current path, the current is converted to voltage in a linear way. The technology used by the current sensor is important because different sensors can have different characteristics for a variety of applications.

Current sensors are based on either open or closed loop hall effect technology. A closed-loop sensor has a coil that is actively driven to produce a magnetic field that opposes the field produced by the current being sensed. The hall sensor is used as a null-detecting device, and the output signal is proportional to the current being driven into the coil, which is proportional to the current being measured.

In an open loop current sensor, the magnetic flux created by the primary current is concentrated in a magnetic circuit and measured using a hall device. The output from the hall device is the signal conditioned to provide an exact (instantaneous) representation of the primary current.

Return to main Sensors page

Getting Started

Sensing Technology Overview

Sensors

Resources

White Papers

Applications Notes

Videos

AMR Position and Current Sensing in Motor Control Applications

Circular Vertical Hall Sensor IC Technology Overview

ACS780 & ACS781 High Current Density Fully Integrated Current Sensor Ics

Product Links

Compare Selected Compare Add Selected Add

Contract pricing display is unavailable at the moment. Prices shown are standard retail prices, orders placed will have contract pricing applied when processed.

Manufacturer Part No	Order Code	Manufacturer / Description	Availability	Price For	Price	Quantity	Quiescent Current	Bandwidth	Current Sense Direction	Accuracy	Measured Current	Sensor Case / Package	Sensor Case Style	No. of Pins	Supply Voltage Min	Supply Voltage Max	Isolation Voltage	Sensor IC Mounting	Operating Temperature Min	Operating Temperature Max	Product Range	Qualification
ACS712ELCTR-20A-T	1329624 Data Sheet + RoHS Date/Lot Code	SENSOR, CURRENT, 20A, SOIC8 ALLEGRO MICROSYSTEMS You previously purchased this product. View in Order History	7,055 in stock + Check Stock & Lead Times 7,055 in stock for next day delivery (UK stock)	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1329624 1329624RL in Re-Reel Available until stock is exhausted	1+ £2.70 £3.24 10+ £2.23 £2.68 25+ £2.19 £2.63 50+ £2.14 £2.57 100+ £2.00 £2.40 250+ £1.95 £2.34 500+ £1.89 £2.27 1000+ £1.82 £2.18 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	10mA	80kHz	Unidirectional, Bidirectional	1.5%	10mA	SOIC	SOIC	8Pins	4.5V	5.5V	2.1kVrms	Surface Mount	-40°C	85°C	-	-
ACS712ELCTR-05B-T	1329623 Data Sheet + RoHS Date/Lot Code	IC, SENSOR, CURRENT, 5A, SOIC8 ALLEGRO MICROSYSTEMS You previously purchased this product. View in Order History	7,595 in stock + Check Stock & Lead Times 7,595 in stock for next day delivery (UK stock) More stock available week commencing 21/09/26	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1329623 1329623RL in Re-Reel	1+ £2.62 £3.14 10+ £2.12 £2.54 25+ £2.07 £2.48 50+ £2.02 £2.42 100+ £1.96 £2.35 250+ £1.88 £2.26 500+ £1.79 £2.15 1000+ £1.73 £2.08 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	10mA	80kHz	Unidirectional, Bidirectional	1.5%	10mA	SOIC	SOIC	8Pins	4.5V	5.5V	2.1kVrms	Surface Mount	-40°C	85°C	-	-
EMC1701-2-AIZL-TR	2361959 Data Sheet + RoHS Date/Lot Code	Current Sensor, High Side, MSOP, 10 Pins MICROCHIP You previously purchased this product. View in Order History	Available to supplier Lead Time + Check lead times Lead time 64 days	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2361959 2361959RL in Re-Reel Non-Cancellable / Non Returnable	2500+ £0.744 £0.89	Restricted Item Minimum order of 2500 items Multiples of 2500 only Please enter a valid quantity Add Min: 2500 Mult: 2500	950µA	-	-	-	950µA	MSOP	MSOP	10Pins	3V	24V	-	-	-40°C	85°C	-	-
ACS711KLCTR-12AB-T	2057423 Data Sheet + RoHS Date/Lot Code	Current Sensor, Overcurrent Fault, Bidirectional, ± 5%, SOIC, 8 Pins ALLEGRO MICROSYSTEMS You previously purchased this product. View in Order History	738 in stock + Check Stock & Lead Times 738 in stock for next day delivery (UK stock) More stock available week commencing 27/07/26	Each	1+ £1.67 £2.00 10+ £1.34 £1.61 50+ £1.28 £1.54 100+ £1.23 £1.48 250+ £1.18 £1.42 500+ £1.12 £1.34 1000+ £1.08 £1.30 2500+ £1.07 £1.28 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	4mA	100kHz	Bidirectional	± 5%	4mA	SOIC	SOIC	8Pins	3V	5.5V	-	Surface Mount	-40°C	125°C	-	-
CSLW6B200M	2396419 Data Sheet + RoHS	Current Sensor, CSLW Series, Open Loop-200mA to 200mA, Sink, Source Output, 4.5 Vdc to 10.5 Vdc HONEYWELL You previously purchased this product. View in Order History	No Longer Stocked	Each	null	Restricted Item	-	-	-	-	-	-	-	-	-	-	-	-	-25°C	100°C	CSL Series	-
ACS758LCB-050B-PFF-T	1791392 Data Sheet + RoHS	Current Sensor, Current Conductor, Bidirectional, - 1.2%, PFF, 5 Pins ALLEGRO MICROSYSTEMS You previously purchased this product. View in Order History	2,304 in stock + Check Stock & Lead Times 2,304 in stock for next day delivery (UK stock) More stock available week commencing 24/08/26	Each	1+ £6.87 £8.24 10+ £5.96 £7.15 25+ £5.52 £6.62 50+ £5.34 £6.41 100+ £5.21 £6.25 250+ £5.11 £6.13 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	10mA	120kHz	Bidirectional	- 1.2%	10mA	PFF	PFF	5Pins	3V	5.5V	4.8kVrms	Through Hole	-40°C	150°C	-	AEC-Q100