CZ-370x Current Sensors

Corresponding to the UL safety standard UL61800-5-1 for industrial equipment, AKM has developed the CZ-370x series coreless current sensor which achieves both creepage distance and clearance distance greater than 8 mm. It supports a working voltage of 400 V_RMS (with reinforced insulation), making insulation design easy. With its ultra-high accuracy, the CZ-370x series can be used for many applications including AC motors and power conditioners.

The CZ-370x series has a low resistance of 0.27 mΩ as the primary conductor resistance with AKM's original package. As a result, compared to shunt resistors and similar products of other companies, heat generation when applying the current can be greatly suppressed, and 60 A_RMS continuous current can be applied. Furthermore, availability with wide current detection ranges from ±5.3 A_PP (CZ-3700) to ±180 A_PP (CZ-3706) are achieved. This enables the adoption of a common design of system boards, making it easy to roll it out to other models with different ratings.

In addition, it is suitable for a sensor signal input to a 5 V A/D converter in a 5 V input system. It has a built-in stray magnetic field reduction function, a challenge for conventional coreless current sensors, contributing to the improvement of system efficiency and precise control in a wide range of applications.