CZ-3A05 Clearance/Creepage 8mm CZ-3A05 3.3V Output Accurate Coreless Current Sensor 1. General Description CZ-3A05 is an open-type current sensor using Hall sensors, which outputs the analog voltage proportional to the AC/DC current. Group III-V semiconductor thin film is used as the Hall sensor, which enables the high-accuracy and high-speed current sensing. Coreless ultra-small surface mount package realizes the space-saving. Also, the low primary conductor resistance suppresses heat generation to achieve the 50A continuous current. Existing coreless current sensors have an accuracy rms disadvantage from degradations caused by a disturbed magnetic field. The CZ-3A0x series has a built-in stray magnetic field reduction function to suppress this effect. The CZ-3A0x series also has dual overcurrent detection function. The CZ-3A0x series is UL 61800-5-1 safety compliant, which is an excellent fit for industrial AC drives, servo motors, etc. The CZ-3A0x series is also an excellent fit to input the sensor signal into a 3.3V AD converter. The CZ-3A0x series has a large variety of linear measurement ranges, from 12.9A (CZ-3A01), to 129.1A, (CZ-3A07). This enables designers to use the same board design across different current rating products. 2. Features Compliant with safety standard of UL61800-5-1 (Clearance, Creepage distance 8.0mm) Certified with safety standards of UL-1577 and IEC/UL62368-1. 3.3V Output Maximum Primary Current : 50A rms High-accuracy : 0.3%F.S.(T =35 85C Typ.) a Quite small primary conductor resistance : 0.27m Typ. Stray magnetic field reduction function Small-sized surface mount package 12.7mm10.9mm2.25mm Dual overcurrent detection function (Adjustable overcurrent detection thresholds) Isolation Voltage 4.2kV AC50Hz 60s rms Non-ratiometric output 018010549-E-02 - 1 - 2021/11 CZ-3A05 3. Applications AC drives DC motors UPS General Inverters Power conditioners Also, CZ-3A05 is suitable for other applications which are required isolation with small size and suppressing heat generation. 4. Table of Contents 1. General Description ......................................................................................................................... 1 2. Features........................................................................................................................................... 1 3. Applications ..................................................................................................................................... 2 4. Table of Contents............................................................................................................................. 2 5. Block Diagram and Functions ......................................................................................................... 3 6. Pin Configurations and Functions ................................................................................................... 4 7. Absolute Maximum Ratings............................................................................................................. 5 8. Recommended Operating Conditions ............................................................................................. 5 9. Electrical Characteristics ................................................................................................................. 6 10. Characteristic Definitions ................................................................................................................. 9 11. External Circuits Example ............................................................................................................. 14 12. Board Layout for Measuring Thermal Resistance......................................................................... 15 13. Package ......................................................................................................................................... 16 14. Reliability Tests .............................................................................................................................. 19 15. Precautions .................................................................................................................................... 20 16. Revision History ............................................................................................................................. 21 IMPORTANT NOTICE .......................................................................................................................... 22 018010549-E-02 - 2 - 2021/11