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⚡ Stay in the know, control with precision — power sensing redefined!
The SZC23-NO-AL Current Sensing Switch offers adjustable AC current detection from 0.2 to 30 amps without needing an external power source. Featuring a clear LED indicator and ultra-fast switching speed, it’s housed in durable, self-extinguishing ABS with 2000V isolation, making it ideal for AC motor overload protection, automatic control systems, and precise current monitoring.












| ASIN | B07P87TG8F |
| Best Sellers Rank | #334,454 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #21 in Current Monitoring Relays |
| Brand | Walfront |
| Brand Name | Walfront |
| Circuit Type | 1-way |
| Connectivity Protocol | X-10 |
| Connector Type | Screw Terminals |
| Contact Material | Plastic |
| Contact Type | Normally Closed, Normally Open |
| Control Method | Touch |
| Current Rating | 30 Amps |
| Customer Reviews | 4.4 out of 5 stars 69 Reviews |
| International Protection Rating | IP30 |
| Item Dimensions | 2.56 x 1.97 x 0.98 inches |
| Item Weight | 0.06 Kilograms |
| Manufacturer | Walfront |
| Material Type | Plastic |
| Mounting Type | Through Hole Mount |
| Number of Items | 1 |
| Number of Positions | 2 |
| Operating Voltage | 240 Volts |
| Operation Mode | Automatic |
| Part Number | Walfront8y7cbug59d |
| Specification Met | Ms |
| Switch Type | Limit Switch, Temperature Switch |
| Terminal | Screw |
| UPC | 724942218735 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 60 Degrees Celsius |
| Wattage | 120 watts |
G**S
works well
I installed a 2000 watt inverter to supply AC to the absorption refrigerator in my class C motorhome. that way I could make sure it was cold without having to run it on propane while I am driving. I ran the hot lead for the AC through the hole in this current sensor and hooked up a led light to it's contacts and now I have an indication of when my refrigerator is actually running. I guess I don't need to know that, but I like to keep track of what's going on in my motorhome. So far it's been very reliable and was simple to set up.
J**E
Works as advertized
I used this switch to turn a lamp on/off that was installed at the bottom of a staircase and powered on a separate circuit from the light at the top of the stairs. The switch operated by sensing the current in a traveler on a two-way switch at the bottom of the stairs (no neutral available there) and triggered a relay to handle the current needed for the lamp. The modified circuit works with approximately a one-second delay, which does not impact the ability to fully light the stairway for use.
J**.
Works
This is my 3rd one. Using in a residential 24VDC PLC application. Solid so far
K**E
Works as intended, but some minor installation issues.
I've wired this in to my 3D printer enclosure to make sure the exhaust fan turns on when the printer is running. This device keeps me from needing a dedicated switch for the fan, and ensures that the fan only turns on when the printer is active and pulling more amps for the motors and heating. I've knocked it one star for two reasons. First, the screw terminals to attach wires are very shallow and I'm concerned about long term retention. Second, the shape is very awkward for wiring it into a standard electrical box and still accessing the current adjustment screw.
J**E
These devices work wonderful streamline my shop shop work flow amazingly well.
Easy to setup.
T**I
Customer switch
Use to turn on exhaust fan on dryer. Switch ac-ac solid state switch to insure handling of power.
F**S
it works
when my sump pump turns on the red light comes on, which was what I wanted. I used the black wire as the trigger, I did 2 loops with it.
W**D
Missing Adjustment Screw
Not actually missing, just disappeared in the hole. Looks like a slotted head screw rather than a phillips head. I did get it adjusted.
B**N
Works great to signal AC battery charger is charging
Works great. I used it to turn on an indicator light in my electric utility vehicle, when charging is underway and complete. The load line of the AC cord supplying the charger goes through the sensing hole, and then the on/off switch in this product controls power to the led indicator light. I was ablt to adjust the sensitivity so that my indicator light was on when battery was being charged and went off when the charger reduced to trickle charge. Great product.
A**R
Works great
As described
R**R
Works as eadvertised
Using it to shut down a secondary load when my air compressor turns on.
L**L
Défectueux après quelques utilisations
Défectueux après qq utilisations
Trustpilot
1 month ago
1 day ago