MaxPac SCR Controllers

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Support and spares available around the world

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Quick Install

Designed for faster installation to reduce your labor time

MaxPac SCR Controllers

The MaxPac Series is specifically designed for the OEM market. The plug-in options, flexible I/O power wiring, space saving footprint, optional lug kits, I2t fusing and universal approvals make it an excellent candidate for your product.

Chromalox’s exclusive DOT (Demand Oriented Transfer) firing switches the fewest number of cycles to provide the most precise zero crossover control. At 50% output the unit’s output alternates between three electrical cycles on and three cycles off. At 51% the output continues with three cycles on / three cycles off and gradually integrates three extra “on” cycle for the additional one percent. With the exception of phase angle firing, DOT firing is the most precise method of SCR control. DOT firing is preferred in many applications because phase angle firing creates unwanted RFI. DOT is excellent for applications where consistent heater/process temperature control is critical

MaxPac I - Single Phase SCR Power Pak

The Chromalox Model MaxPac I Single Phase Solid State SCR Power Controller is a highly versatile power pak with optional plug-in Shorted SCR Detection Boards. Firing modes can be switched between On/Off and proportional Zero Cross or DOT Firing power control at any time based on process needs.

 

MaxPac II - Three Phase, 2 Leg SCR Power Pak

The MaxPac II is a Solid State, highly versatile power pak with optional plug-in proportional Firing and Shorted SCR Detection Boards. Firing techniques include: “ON/OFF Power Control” (Contactor) and “Proportional Power Control” (Zero Voltage Switching, DOT fire).

 

MaxPac III - Three Phase, 3 Leg SCR Power Pak

The Chromalox Model MaxPac III is a Solid State, highly versatile power pak with optional plug-in proportional Firing and Shorted SCR Detection Boards. Firing techniques include: “ON/OFF Power Control” (Contactor) and “Proportional Power Control” (Zero Voltage Switching, DOT fire). 

 

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Every heating challenge is unique. Chromalox offers the industry’s most comprehensive offering of component heaters and controls. Our experienced engineers will work with you to provide a complete thermal solution for your unique application.