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Macromatic Industrial Controls

Located in Menomonee Falls, Wisconsin, Macromatic Industrial Controls engineers and manufactures industrial relays that control electrical processes and protects equipment from damaging or hazardous fault conditions. Macromatic provides solutions for almost any application in any industry. Macromatic’s products are used in the oil and gas, HVACR, pump control, material handling, irrigation, wastewater, mining, hoist, motor control, generator, lift and elevator industries and many more. As an independently-owned manufacturer of state-of-the-art control and monitoring products for over 40 years, Macromatic takes pride in its short lead-time, flexible product design, and exceptional technical support.

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Product Overview


Macromatic offers a wide variety of AC & DC current sensing relays (sometimes referred to as current monitor relays). They be used in several applications where protection of sensitive or expensive equipment against over or under current conditions is required, such as detecting (sensing) conveyor jam-up conditions, machine tool wear, no load conditions or monitoring status of heater or lamp loads. An external current transformer may be used to extend the range of these products (for more information, read our KnowledgeBase Article).

Choose the type of mounting configuration required for your application and then select from a variety of functions, time delay settings, and output configurations:

CAH, COH & CUH Series
COKP Series
CAP Series
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Used with  8 or 11 pin octal sockets. Allows for easy replacement without having to remove any control wiring. Macromatic sockets can either be mounted on 35mm DIN track or to the panel with two screws. All Macromatic plug-in time delay relays are UL Listed for use in both United States and Canada (cULus) when used with the appropriate Macromatic socket as well as Component Recognized (cURus) using any recognized socket. 

CAP Series: Detects AC or DC overcurrent condition, 11 pin octal socket

COKP Series: Detects AC overcurrent condition, 8 pin octal socket



These products have an encapsulated construction for protection against harsh environments. They are easy to mount with two screws and use 0.25" quick-connect terminations for easy wiring. All Macromatic encapsulated current sensing relays are UL Component Recognized.

CAH Series: Detects either an overcurrent or undercurrent condition

COH Series: Detects overcurrent condition only

CUH Series: Detects undercurrent condition only

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