CT42x

XtremeSense® TMR Sensor

1 MHz, High Precision XtremeSense® TMR
Isolated Current Sensor in SOIC-8 Package

Data Sheets

The CT42x family is a high bandwidth, fast response and ultra-low noise integrated contact current sensors that use Crocus Technology’s patented XtremeSense® TMR technology to enable high accuracy current measurements for many consumer, enterprise, and industrial applications. It supports eight (8) current ranges where the integrated current carrying conductor (CCC) will handle up to 65 A of current and generates a current measurement as a linear analog output voltage. It achieves a total output error of less than ±1.0% full-scale (FS) over voltage and the full temperature range.

The CT42x family is offered in an industry standard 8-lead SOIC package that is “green” and RoHS compliant.

Product features and performance

CT425 & CT428 (5.0 V version), CT426 & CT427 (3.3 V version)
Integrated 0.5 mΩ Conductor
Total Error Output: ±0.5% FS (typ.)
300 ns Response Time, 1 MHz Bandwidth
Noise as Low as 9 mA_RMS
Immunity to Common Mode Field: -54 dB
Rated Isolation Voltage: >4 kV_RMS
UL/IEC 62368-1 and UL1577 Certification
IEC 61000-4-5 Certified
AC or DC Current Range:
- +20.0 A_DC / ±20.0 A_PK
- +30.0 A_DC / ±30.0 A_PK
- +50.0 A_DC / ±50.0 A_PK
- +65.0 A_DC / ±65.0 A_PK
Pin #6 Functionality
- CT427 & CT248: Over-Current Detection Output Pin
- CT425 & CT426: Enhanced Filter to Lower Noise

Design Files

Application Notes

Next Steps

Current Range:

Sensor Polarity:

Operating Temperature Range:

Package:

Part Order Number	Current Range	Sensitivity (mV/V/mT)	Vₒᵩ (V)	V_CC (V)	Polarity	Typ. Total Error	Max. Total Error	VREF Output	Filter	Fault# for OCD	CMFRR (dB)	Response Time (ns)	Auto Grade	Operating Temperature Range	Package
CT425-ESN820DR	0 A to +20 A	200.0	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT425-HSN820DR	0 A to +20 A	200.0	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT425-ASN820DR	0 A to +20 A	200.0	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT425-ESN820MR	-20 A to +20 A	100.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT425-HSN820MR	-20 A to +20 A	100.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT425-ASN820MR	-20 A to +20 A	100.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT425-ESN830DR	0 A to +30 A	133.3	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT425-HSN830DR	0 A to +30 A	133.3	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT425-ASN830DR	0 A to +30 A	133.3	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT425-ESN830MR	-30 A to +30 A	66.7	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT425-HSN830MR	-30 A to +30 A	66.7	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT425-ASN830MR	-30 A to +30 A	66.7	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT425-ESN850DR	0 A to +50 A	80.0	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT425-HSN850DR	0 A to +50 A	80.0	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT425-ASN850DR	0 A to +50 A	80.0	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT425-ESN850MR	-50 A to +50 A	40.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT425-HSN850MR	-50 A to +50 A	40.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT425-ASN850MR	-50 A to +50 A	40.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT425-ESN865DR	0 A to +65 A	61.5	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT425-HSN865DR	0 A to +65 A	61.5	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT425-ASN865DR	0 A to +65 A	61.5	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT425-ESN865MR	-65 A to +65 A	30.8	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT425-HSN865MR	-65 A to +65 A	30.8	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT425-ASN865MR	-65 A to +65 A	30.8	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT426-ESN820DR	0 A to +20 A	100.0	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT426-HSN820DR	0 A to +20 A	100.0	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT426-ASN820DR	0 A to +20 A	100.0	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT426-ESN820MR	-20 A to +20 A	50.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT426-HSN820MR	-20 A to +20 A	50.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT426-ASN820MR	-20 A to +20 A	50.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT426-ESN830DR	0 A to +30 A	66.7	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT426-HSN830DR	0 A to +30 A	66.7	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT426-ASN830DR	0 A to +30 A	66.7	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT426-ESN830MR	-30 A to +30 A	33.3	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT426-HSN830MR	-30 A to +30 A	33.3	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT426-ASN830MR	-30 A to +30 A	33.3	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT426-ESN850DR	0 A to +50 A	40.0	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT426-HSN850DR	0 A to +50 A	40.0	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT426-ASN850DR	0 A to +50 A	40.0	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT426-ESN850MR	-50 A to +50 A	20.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT426-HSN850MR	-50 A to +50 A	20.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT426-ASN850MR	-50 A to +50 A	20.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT426-ESN865DR	0 A to +65 A	30.8	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT426-HSN865DR	0 A to +65 A	30.8	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT426-ASN865DR	0 A to +65 A	30.8	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT426-ESN865MR	-65 A to +65 A	15.4	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +85°C	SOIC-8
CT426-HSN865MR	-65 A to +65 A	15.4	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	-	-40°C to +125°C	SOIC-8
CT426-ASN865MR	-65 A to +65 A	15.4	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	Yes	No	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT427-ESN820DR	0 A to +20 A	100.0	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT427-HSN820DR	0 A to +20 A	100.0	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT427-ASN820DR	0 A to +20 A	100.0	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT427-ESN820MR	-20 A to +20 A	50.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT427-HSN820MR	-20 A to +20 A	50.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT427-ASN820MR	-20 A to +20 A	50.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT427-ESN830DR	0 A to +30 A	66.7	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT427-HSN830DR	0 A to +30 A	66.7	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT427-ASN830DR	0 A to +30 A	66.7	0.65	3.3	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT427-ESN830MR	-30 A to +30 A	33.3	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT427-HSN830MR	-30 A to +30 A	33.3	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT427-ASN830MR	-30 A to +30 A	33.3	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT427-ESN850DR	0 A to +50 A	40.0	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT427-HSN850DR	0 A to +50 A	40.0	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT427-ASN850DR	0 A to +50 A	40.0	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT427-ESN850MR	-50 A to +50 A	20.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT427-HSN850MR	-50 A to +50 A	20.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT427-ASN850MR	-50 A to +50 A	20.0	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT427-ESN865DR	0 A to +65 A	30.8	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT427-HSN865DR	0 A to +65 A	30.8	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT427-ASN865DR	0 A to +65 A	30.8	0.65	3.3	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT427-ESN865MR	-65 A to +65 A	15.4	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT427-HSN865MR	-65 A to +65 A	15.4	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT427-ASN865MR	-65 A to +65 A	15.4	1.65	3.3	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT428-ESN820DR	0 A to +20 A	200.0	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT428-HSN820DR	0 A to +20 A	200.0	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT428-ASN820DR	0 A to +20 A	200.0	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT428-ESN820MR	-20 A to +20 A	100.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT428-HSN820MR	-20 A to +20 A	100.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT428-ASN820MR	-20 A to +20 A	100.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT428-ESN830DR	0 A to +30 A	133.3	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT428-HSN830DR	0 A to +30 A	133.3	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT428-ASN830DR	0 A to +30 A	133.3	0.50	5.0	Unipolar	±0.7% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT428-ESN830MR	-30 A to +30 A	66.7	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT428-HSN830MR	-30 A to +30 A	66.7	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT428-ASN830MR	-30 A to +30 A	66.7	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT428-ESN850DR	0 A to +50 A	80.0	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT428-HSN850DR	0 A to +50 A	80.0	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT428-ASN850DR	0 A to +50 A	80.0	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT428-ESN850MR	-50 A to +50 A	40.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT428-HSN850MR	-50 A to +50 A	40.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT428-ASN850MR	-50 A to +50 A	40.0	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT428-ESN865DR	0 A to +65 A	61.5	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT428-HSN865DR	0 A to +65 A	61.5	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT428-ASN865DR	0 A to +65 A	61.5	0.50	5.0	Unipolar	±0.7% FS	<±1.5% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
CT428-ESN865MR	-65 A to +65 A	30.8	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +85°C	SOIC-8
CT428-HSN865MR	-65 A to +65 A	30.8	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	-	-40°C to +125°C	SOIC-8
CT428-ASN865MR	-65 A to +65 A	30.8	2.50	5.0	Bipolar	±0.5% FS	<±1.0% FS	No	No	Yes	-54.00	300	AEC-Q100 Grade1	-40°C to +125°C	SOIC-8
	Current Range				Polarity									Operating Temperature Range	Package

Products

CT42x

1 MHz, High Precision XtremeSense® TMR
Isolated Current Sensor in SOIC-8 Package

Data Sheets

Product features and performance

Design Files

Application Notes

Next Steps

Contact us to learn more about how we are Advancing
Intelligence in Sensing with XtremeSense^® TMR technology

© 2022 Crocus Technology, Inc. All rights reserved.

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CT42x

1 MHz, High Precision XtremeSense® TMR Isolated Current Sensor in SOIC-8 Package

Data Sheets

Product features and performance​

Design Files​

Application Notes

Next Steps

Contact us to learn more about how we are AdvancingIntelligence in Sensing with XtremeSense® TMR technology ​

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© 2022 Crocus Technology, Inc. All rights reserved.

Request a Demo or Sample Board

1 MHz, High Precision XtremeSense® TMR
Isolated Current Sensor in SOIC-8 Package

Product features and performance

Design Files

Contact us to learn more about how we are Advancing
Intelligence in Sensing with XtremeSense^® TMR technology