News Release

- New Product Information -

2018/12/18
AKM releases a high accuracy 3.3V coreless current sensor with more than 8mm of Creepage Distance/Clearance

Product Name
CZ-3A01, CZ-3A02, CZ-3A03,
CZ-3A04, CZ-3A05, CZ-3A06,
CZ-3A07

Product Category:
Current Sensors > High Accuracy Coreless Current Sensors
Title
High Accuracy 3.3V Coreless Current Sensor
Creepage Distance/Clearance > 8mm
Applications
AC Motors, DC Motors, UPS’s,
General Inverters, Power Conditioners
CZ-3A0x
CZ-3A0x

Description

Corresponding to the UL safety standard UL61800-5-1 for industrial equipment, Asahi Kasei Microdevices, (AKM), has developed the CZ-3A0x series coreless current sensor, which achieves both creepage distance and clearance greater than 8mm.  With a wide current detection lineup from ±12.9 to ±129.1App, 50Arms, and two overcurrent protection circuits, the CZ-3A0x series can be used for many applications including AC motors and general-purpose inverters.  In addition, it is suitable for a sensor signal input to a 3.3V A/D converter.

Features

● Creepage/Clearance Distance > 8mm

By developing AKM’s original package, both creepage distance and clearance of 8mm or more is achieved.  It supports a Working Voltage of 600Vrms (with reinforced insulation), making insulation design easy.


● Support ±12.9 to ±129.1App and 50Arms Low-heat Generation

The CZ-3A0x series has a low resistance of 0.27mΩ 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 50Arms continuous current is achieved.  Furthermore, availability with wide current detection ranges from ± 12.9App, (CZ-3A01), to ± 129.1App (CZ-3A07) is available.  This enables adoption of a common design of system boards, making it easy to roll it out to other models with different ratings.


● 3.3V Output

The CZ-3A0x series supports 3.3V output.  It is best for a sensor signal input to a 3.3V A/D converter.


● Overcurrent Detection Function

The CZ-3A0x series is suitable for overcurrent detection since it has two overcurrent detection circuits.

Main Specifications of the CZ-3A0x series

Product NameLinear Sensing Range
(A)
Sensitivity
(mV/A)
Temperature Drift of Sensitivity
(%) *1
Temperature Drift of Zero-Current Output
(mV) *1
Total Accuracy
(%F.S.) *2
Response Time
(μs)
CZ-3A01 ±12.9 120





±0.6





±2.8



0.2
(Typ.)

0.4
(Max.)





1
CZ-3A02 ±15.5 100
CZ-3A03 ±22.170
CZ-3A04 ±32.248
CZ-3A05 ±64.524
CZ-3A06 ±103.315
CZ-3A07 ±129.112
*1  It is defined as the "average value ± 3σ" of the actual measurement result (Ta = 35 to 85 °C) in a certain lot.
*2  The typical value is defined as the “average value ± 1σ” of the actual measurement result (Ta = 35 to 85 °C) in a certain lot.  In the same manner, the minimum and maximum values are defined as the “average value ± 3σ” of the actual measurement result (Ta = 35 to 85 °C) in a certain lot.

[Notes]
* Information on this page is current on the date of press release.
* AKM is a trademark of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.
* Currentier is a trademark of Asahi Kasei Microdevices Corporation (under registration review).

Page Top

top