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Current Sensing Switch, Normally Open AC Current Switch Adjustable AC 0.2-30A SZC23-NO-AL-CH for AC Current Measurement Monitoring Electronic Switch of Automatic Control System

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About this item

【Adjustable AC Current】Action current 0.2-30A AC, adjustable with a potentiometer. Straight-through structure design, isolation withstand voltage up to 2000V. Self-powered, no external power supply required.
【Widely Used】Suitable for AC current measurement and monitoring, AC motor overload , electronic switch of automatic control system and so on. Compared with traditional mutual inductors, thermal protectors and other devices, using this device can not only get more accurate and more timely control, but can also greatly simplify the design and reduce costs.
【Quickly Responsive】High-power MOS tube contactless electronic switch. The switch has no limit on the number of opening and closing, and the speed reaches the ms level. LED indicator can conveniently and intuitively indicate the working status of the switch.
【Main Function】SZC23 series AC current sensing switch is designed and manufactured to solve the AC current monitoring. It uses the principle of mutual inductance to sense the AC straight-through current, isolate the AC current, and output a normally open or normally closed switching to directly control various automation industrial equipment, such as flash, buzzer, relay, single-chip or other power load equipment.
【High Performance】The outer casing of the adjustable current sensing switch is made of self-extinguishing material ABS. Hysteresis is less than 1% and can be used under strong magnetic conditions.

Description
SZC23 series AC current sensing switch is designed and manufactured to solve the AC current monitoring. It uses the principle of mutual inductance to sense the AC straight-through current, isolate the AC current, and output a normally open or normally closed switching to directly control various automation industrial equipment, such as flash, buzzer, relay, single-chip or other power load equipment. Compared with traditional mutual inductors, thermal protectors and other devices, using this device can not only get more accurate and more timely control, but can also greatly simplify the design and reduce costs.

Specification:
Model: SZC23-NO-AL-CH
Power supply: Not required
Rated load: 0.5A@240V AC/DC
Input current: 0.2-30A AC
Switch on minimum: 0.5±0.2A
Maximum overload:
Leakage current: 0.1A
Accuracy: 1%
Hysteresis: 1%
Response time: 200ms
Repeatability:
Working temperature: -20~60
IP30
Dimensions: 65*25*47mm / 2.56*0.98*1.85in
Hole diameter: 10mm / 0.4in
Package weight: Approx. 56g/2.0oz

Package list:
1 * Current Sensing Switch

Note:
1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item.
2. Please allow slight error due to manual measurement. Thanks for your understanding.

Stephen Junker

2025-08-17 17:01:24

very good

Jim J

2025-07-01 16:26:38

Just what I needed to turn on dust collectors when the saws are turned on

Bills72SJ

2025-05-18 17:58:26

I added a fresh air damper to my home's HVAC system. I needed it to remain closed and only open when the blower for the furnace is actually running. I did not want to tie into any of the electricals of the furnace in any way. Mounting this, and running the blower feed wire through the hole, has given me an extremely reliable method for always determining when the blower is actually operating. I have even done this for a customer's home so that the life of his expensive HEPA filters can be extended without voiding the warranty of his new furnace.

Stephen Junker

2025-04-24 14:15:17