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AS3 Series Current Switches

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  • AS3 Series Current Switches

NK Technologies AS3 Current Operated Switch

See other NK Technologies products

Mitchell Part Number: NEK-AS3

Availability: Typically In stock - Call if Urgent!


Quick Overview

AS3 Series from NK Technologies are solid-state current operated switches. They operate (switch) when the current level through the sensing aperture exceeds the adjustable setpoint. Internal circuits are totally powered by induction from the line being monitored. They work in the same environment as motors, contactors, heaters, pull-boxes, and other electrical enclosures. They can be mounted in any position or hung directly on wires with a wire tie.

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AS3 Series Current Operated Switches provide the same dependable indication of status offered by the AS1, but with the added benefit of increased setpoint accuracy. A choice of three, jumper-selectable input ranges allows the AS3 to be tailored to an application, providing more precise control through improved setpoint resolution. Self-powering, isolated solid-state outputs, 1–6A, 6–40A and 40–200A input ranges, and a choice of split- or solid-core enclosures are standard.

Choice of N.O. or N.C. Solid State Ouputs
1A @ 240VAC, 0.15A @ 30VDC.
15A @ 120VAC (-15 model).
   3A @ 120VAC output optional, consult factory.
Cuts installation and operating costs.
Easily Adjustable Setpoint
Speeds startup.
Solid or Split-core Case
Choose the appropriate version for each installation.
LED Indicaton
Provides quick visual indiction of contact status.
Built-in Mounting Feet
Provides the secure installation inspectors require.
UL, CUL and CE Approval
Accepted worldwide.

Electronic Proof of Flow
Current operated switches eliminate the need for multiple pipe or duct penetrations and is more reliable than electromechanical pressure or flow switches.
Detects jams and overloads. Interlocks multitple conveyor sections.
Lighting Circuits
Easier to install and more accurate than photocells.
Electrical Heaters
Faster response than temperature sensors.


Power Supply: None—Self-powered
Output: Isolated Solid-state Switch; Shared Common (CCDC)
Output Rating: 1.0A @ 240VAC (Standard AC Units)
                      0.15A @ 30VDC (Standard DC & Multi-pole Units)
                      15A @ 120VAC, 10A @ 240VAC (-15 Option)
                      3.0A @ 120VAC* (-FT only)
Off-State Leakage: <10μA
Response Time: 40-120 ms
Setpoint Range: Solid-core: 1–6, 60–40 & 40–175A Split-Core: 1.75–6, 60–40 & 40–200A
Hysteresis: Low: 0.15A, Mid: 0.3A, High: 0.9A
Isolation Voltage: UL Listed to 1270VAC, tested to 5000VAC
Frequency Range: 6–100Hz
Sensing Aperture: -FF Case: 0.55” (14mm) dia.
                           -FT Case: 0.74” (19mm) dia.
                           -SP Case: 0.85” (21.6mm) sq.
Case: UL94 V0 Flammability Rated
Environmental: -58 to 122oF (-50 to 50oC) 0–95% RH, non-condensing

Shipping Weight 1.0000
Manufacturer NK Technologies
Manufacturer Warranty 1 Year

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