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After exploring an incredibly huge number of articles and reviews by our powerful Artificial Intelligence & ML algorithms; and comprehensive reprocessing, breakdown and rectification by our professional hi-technology experts, the golden shortlist for the Best Current Switches (2021) is ultimately assembled.

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In order to find the Best Current Switches (2021), our powerful platforms and experts have taken many elements into account such as product usability, features that meet buyers needs and give buyer satisfaction, freedom from deficiencies or defects, conformity of standards, affordability, dependability, user-friendly design, quality conformance to user requirements and regulations, health and safety, actual customer satisfaction and lots of others. It is worth to note that each user has different requirements so please consider the below benchmarking as a guideline and not as a gospel. Nevertheless, in the below ranking you can undoubtedly find the overall best ones despite your needs.

Our smart platforms and specialist high-technology gurus work hard to provide you with the best product options. We strongly believe that our review assessment can help you simplify your purchase decision and select among the very Best Current Switches (2021).

Best Current Switches

Best Choice No. 1
Current Sensing Switch, Normally Open Current Sensing Relay Adjustable AC 0.2A -30A (SZC23-NO-AL-CH Model)
Current Sensing Switch, Normally Open Current Sensing Relay Adjustable AC 0.2A -30A (SZC23-NO-AL-CH Model)
  • ❤Self-powered, no external power supply required.
  • ❤Action current 0.2-30A AC, adjustable with a potentiometer.
  • ❤LED indicator can conveniently and intuitively indicate the working status of the switch.
  • ❤High-power MOS tube contactless electronic switch.
  • ❤The switch has no limit on the number of opening and closing, and the reaction speed reaches the ms level.
$24.89
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Best Choice No. 2
Suncourt SW100 Current Switch
Suncourt SW100 Current Switch
  • Turns 120 VAC devices on when input current is sensed
  • UL 94-V0 rated for flammability safety
  • Item Package Dimension: 4.0″ L x 4.0″ W x 4.0″ H
  • Item Package Weight: 1.0 lb
$31.30
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Best Choice No. 3
AC Current Sensing Switch Adjustable Current 0.2~30A Flameproof ABS Self-Powered Sensing Switch Users Manual(Normally Open)
AC Current Sensing Switch Adjustable Current 0.2~30A Flameproof ABS Self-Powered Sensing Switch Users Manual(Normally Open)
  • ✔ Automation Equipment Control — Control various automation industrial equipment, flashlights, buzzers, relays, microcontrollers, or other electrical load devices. An ideal choice for automated industrial equipment and power monitoring
  • ✔ High Accuracy Stable Performance — Compared with traditional device, thermal protectors and other devices, it has the advantages of high accuracy, stable performance and long service life. Installation Form: Guide Rail 35mmDIN
  • ✔ Convenient Monitoring Detecting Current — The current sense switch is for safety, simple, and convenient monitoring or detection of current in the electrical equipment. Threading Hole Diameter: 8mm. Shell Material: Fireproof ABS
  • ✔ Used In Industries Current Monitoring — Widely used in substation, frequency conversion speed control device, inverter device, electrolytic plating, electric locomotive, street lamp monitoring, coal mine and other automation industries that need current monitoring
  • ✔ Electromagnetic Mutual Inductance Of Current — Using the principle of electromagnetic mutual inductance of current, the advanced output detection, monitoring and protection alarm products developed by the non-power supply technology are adopted
$12.59
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Best Choice No. 4
Dwyer Current Switch, CCS-221100, Split Core, Fixed Set Pt 1.00
Dwyer Current Switch, CCS-221100, Split Core, Fixed Set Pt 1.00
  • Output: Normally open, NPN.
  • Humidity Limits: 0 to 95% (non-condensing).
  • Range: 0 to 200 Amps AC
  • Enclosure Rating: UL, 94 V-O flammability rated, ABS plastic housing.
  • Approvals: CE, cUL, UL.
$30.90
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Best Choice No. 5
AC Current Sensing Switch Flameproof Adjustable 0.2~30A IP30 Self-Powered Sensing Switch(Normally Closed)
AC Current Sensing Switch Flameproof Adjustable 0.2~30A IP30 Self-Powered Sensing Switch(Normally Closed)
  • Control of various automatic industrial control equipment, flash, buzzer, relay, single chip, or other power load equipment.
  • Using the electromagnetic mutual inductance principle of current, the advanced switch output detection, monitoring and protection alarm type products without power supply technology are adopted.
  • Widely used in substation, frequency control device, inverter device, electrolytic plating, electric locomotive, street lamp monitoring, coal mine and other need current monitoring automation industry.
  • Compared with traditional transformer and thermal protector, it has the advantages of high accuracy, stable performance and long service life.
  • The current-sensing switch is for safe, convenient monitoring or detecting the current of electric equipment. An ideal choice for automatic industrial control equipment and electric power monitoring.
$16.79
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Best Choice No. 6
Current Sensing Switch, Normally Open Current Sensing Switch Adjustable AC 0.2-30A SZC23-NO-AL-CH for AC Current Measurement and Monitoring
Current Sensing Switch, Normally Open Current Sensing Switch Adjustable AC 0.2-30A SZC23-NO-AL-CH for AC Current Measurement and Monitoring
  • ✪✪✪✪✪[Current] Self-powered, no external power supply required. Hysteresis is less than 1% and can be used under strong magnetic conditions. Action current 0.2-30A AC, adjustable with a potentiometer.
  • ✪✪✪✪✪[LED Indicator] LED indicator can conveniently and intuitively indicate the working status of the switch.
  • ✪✪✪✪✪[Straight-through Dtructure] High-power MOS tube contactless electronic switch. Straight-through structure design, isolation withstand voltage up to 2000V.
  • ✪✪✪✪✪[Self-extinguishing Material] The outer casing is made of self-extinguishing material ABS. The switch has no limit on the number of opening and closing, and the reaction speed reaches the ms level.
  • ✪✪✪✪✪[Applicable] The product is suitable for AC current measurement and monitoring, AC motor overload protection, electronic switch of automatic control system and so on.
$15.79
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Best Choice No. 7
Current Sensing Switch, Normally Open Current Sensing Switch Adjustable AC 0.2-30A SZC23-NO-AL-CH
Current Sensing Switch, Normally Open Current Sensing Switch Adjustable AC 0.2-30A SZC23-NO-AL-CH
  • Self-powered, no external power supply required.Action current 0.2-30A AC, adjustable with a potentiometer.
  • LED indicator can conveniently and intuitively indicate the working status of the switch.Hysteresis is less than 1% and can be used under strong magnetic conditions.
  • The switch has no limit on the number of opening and closing, and the reaction speed reaches the ms level.The outer casing is made of self-extinguishing material ABS.
  • High-power MOS tube contactless electronic switch.Straight-through structure design, isolation withstand voltage up to 2000V.
  • Suitable for AC current measurement and monitoring, AC motor overload protection, electronic switch of automatic control system and so on.
$13.69
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Best Choice No. 8
Johnson Controls CSD-CF0A0-1 Series CSD Digital Output Current Switch, Clamp/Split Core, Fixed Threshold, 0.15 amps
Johnson Controls CSD-CF0A0-1 Series CSD Digital Output Current Switch, Clamp/Split Core, Fixed Threshold, 0.15 amps
  • Dual function — monitors current and motor start and stop
  • 100% solid-state output — has no moving parts to fail
  • Polarity insensitive output — provides easier wiring
  • Snap-in mounting bracket — simplifies installation
  • Small size — fits in tight enclosures
$52.97
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Best Choice No. 9
AC Current Switch Adjustable Current Sensing Switch Flameproof Normally Open Close Current Sensing Switch, 0.2~30A Self-Powered Current Switch (Close)
AC Current Switch Adjustable Current Sensing Switch Flameproof Normally Open Close Current Sensing Switch, 0.2~30A Self-Powered Current Switch (Close)
  • Controls Various Items: Control of various automatic industrial control equipment, flash, buzzer, relay, single chip, or other power load equipment
  • Widely Applications: Widely used in substation, frequency control device, inverter device, electrolytic plating, electric locomotive, street lamp monitoring, coal mine and other need current monitoring automation industry.
  • More Stable Perforance: Compared with traditional transformer and thermal protector, it has the advantages of high accuracy, stable performance and long service life
  • Upgrade Technology: Using the electromagnetic mutual inductance principle of current, the advanced switch output detection, monitoring and protection alarm type products without power supply technology are adopted
  • Ideal Tool for You: An ideal choice for automatic industrial control equipment and electric power monitoring
$13.79
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Best Choice No. 10
Current Switch, Self-Powered Current Sensing Switch SZC25-NO-AL-CH AC 0.5-50A Adjustable Normally Open Current Sensing Relay for Flash Buzzer Transformer Substation
Current Switch, Self-Powered Current Sensing Switch SZC25-NO-AL-CH AC 0.5-50A Adjustable Normally Open Current Sensing Relay for Flash Buzzer Transformer Substation
  • ⭐【HIGH PRECISION & STABLE PERFORMANCE】The product features high quality, high precision, stable performance and long service life. It has the advantages of high precision, more stable heart, and long service life. It is an ideal choice for automated industrial equipment and store monitoring.
  • ⭐【WORKING PRINCIPLES】This 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 current through the AC, isolate the AC current, and output a normally closed switching signal to directly control various automated chemical equipment.
  • ⭐【FAST RESPONSE & LED INDICATOR】The switch has no new limit, and the reaction speed reaches ms. The LED state indicator provides a convenient and intuitive representation of the operating status of the switch. Through-heart structure design, isolation withstand voltage up to 2000V.
  • ⭐【SELF-POWERED SENSING SWITCH】Self-powered, no external power supply required, high-power MOS tube non-contact electronic switch. The operating current of 0.5-50A AC can be adjusted by the potentiometer.
  • ⭐【WIDE APPLICATION】Widely used in substation, frequency conversion speed control device, inverter device, electrolytic plating, electric locomotive, street lamp monitoring, coal mine and other automation industries requiring current monitoring.It is an ideal choice for automated industrial equipment and store monitoring.
$21.49
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