Watlow DIN-A-MITE Power Controllers | Compact SCR Control Solutions

Watlow DIN-A-MITE Series Power Controllers The DIN-A-MITE family of power controllers from Watlow includes SCR control, heat sink, wiring, and a touch-safe exterior all in one package. By designing the DIN-A-MITE as a total unit, we've eliminated the need to prep wires for terminals, find the heat sink for rated amperage, and determine adequate terminations. Watlow's DIN-A-MITE is a complete package you can install and forget - everything is done for you.

In this one package, you'll get:

Simplicity, easy, fast installation
Minimal preparation time
No component selection - you won't have to buy separate parts and worry if they will work
Minimal engineering involved - you get a complete package, a finished product
Safety with a touch-safe exterior
A more compact product than other solid-state alternatives for space and cost savings
A good replacement for the mercury displacement relay (MDR)

DIN-A-MITE® Series Power Controller Features

200KA SCCR
1-phase, 3-phase (2-leg), or 3-phase (3-leg) options
Zero Cross output firing
Max output:
- 40A (Models A and B)
- 80A (Model C)
- 100A (Model D)
No drill and tap necessary
Back panel or DIN-rail mounted
Simple, safe for wiring
UL 508, C-UL, CE, SCCR agency approvals
Easy, Fast Installation
Achieve optimum control with zero cross-switching
Reduces wear on thermal wear
System failure prevention
Rugged, back-to-back SCR design ensures long-term reliability

DIN-A-MITE® Series Power Controller Products

DIN-A-MITE A

The DIN-A-MITE® A power switching device controller is designed and manufactured with quality features expected from Watlow. DIN-A-MITE A capabilities include single-phase zero-cross switching up to 25 amperes at 600VAC (see rating curve). A unique integrated design removes the guesswork associated with selecting a proper heat sink and adequate terminations for the application. DIN-rail and back panel mounting are standard on this family of power switching devices. The DIN-A-MITE is also mercury-free. Variable time base, 4-20mA process control, or VAC/VDC input contactor versions are available. All configurations are model number dependent and factory selectable. This power controller includes a 200KA short circuit current rating (SCCR) tested up to 480VAC to prevent arc flash with required fusing.

Watlow DIN-A-MITE B Power Controller DIN-A-MITE B

The DIN-A-MITE® B is a low-cost, highly compact, and versatile solid-state electric heat controller. The DIN-A-MITE B capabilities include single-phase and three-phase zero-cross switching up to 40 and 22 amperes, respectively, at 600VAC (see rating curve). This electric heat controller's design includes proper heat sinking and terminations, simplifying integration into applications. DIN-rail and back panel mounting are standard on this electric heat controller. The DIN-A-MITE controller is also mercury-free. Variable time base, 4-20mA process control, or VAC/VDC input contactor versions are available. A shorted silicon controlled rectifier (SCR) alarm option is also available. All configurations are model number dependent and factory selectable. This power controller also includes a 200KA short circuit current rating (SCCR) tested up to 480VAC to prevent arc flash with required fusing.

Watlow DIN-A-MITE C Power Controller DIN-A-MITE C

The DIN-A-MITE C silicon controlled rectifier (SCR) power controller provides a low cost, compact and versatile solid state controller option for controlling electric heat. This solid state controller is designed and manufactured with the quality features expected from Watlow. DIN-rail and standard panel mounting plus a cabinet thru-wall mount version are available. Basic features of the solid state controller include single-phase, three-phase/two leg, and three-phase/three leg, 24-600VAC operation. Current switching capabilities range from 30 to 80A depending on the model ordered. Variable time base, linear voltage and current process control or VAC/VDC input contactor versions are available. Single-phase, phase angle firing and current limiting are also available. All configurations are model number dependent and factory selectable. This solid state power controller includes 200KA short circuit current rating (SCCR) tested up to 480VAC to prevent arch flash with required fusing.

Watlow DIN-A-MITE D Power Controller DIN-A-MITE D

The DIN-A-MITE® D silicon controlled rectifier (SCR) power controller provides an inexpensive, versatile product for controlling heat in an efficient package. This SCR controller is designed and manufactured with the quality features expected from Watlow. The back panel mounting matches the footprint of the industry standard mercury displacement relay. There is no need to worry about mercury; the DIN-A-MITE controller is mercury free. The DIN-A-MITE Style D is capable of zero-cross switching up to 100 amperes single-phase, at 600VAC at 86°F (30°C), depending on the model selected. Two or three controllers used together can control three-phase. It is totally touch-safe and includes standard back panel mounting, on-board semiconductor fuses (accessible from the front) and a current transformer option for external load current monitoring. An optional “shorted SCR detector” feature is available on some models. This model is UL®508 listed and C-UL®and CE certified. These agency approvals are ideal for those panel builders that require agency approvals on their panels and cabinets. Variable time base, 4-20mA process control, or VAC/VDC input contactor options are available. All configurations are model number dependent and factory selectable. This power controller also includes 200KA short circuit current rating (SCCR) tested up to 480VAC to prevent arch flash with required fusing.

DIN-A-MITE® Series Power Controller Applications

Food Equipment
Life science/medical
Ovens/Furnaces
Packaging
Petroleum/Chemical
Plastics
Semiconductor
Wave Solder and Reflow

Q&A Section with Expand/Collapse Icons

DIN-A-MITE® Series Power Controllers Q & A

+ What voltage, current, and phase configurations are available in the DIN-A-MITE series?

The Watlow DIN-A-MITE Power Controller Series is available in several models offering different voltage, current, and phase configurations to meet diverse industrial heating needs. Depending on the model, the series supports single-phase and three-phase operation with voltage ratings up to 600 VAC and current ratings up to 100 A. Models such as the DIN-A-MITE A and B handle lower current single- and three-phase loads, while the C and D versions are suited for higher-current or three-phase applications. Selecting the right configuration depends on your load requirements, voltage supply, and installation environment.

+ What control inputs and firing modes does the DIN-A-MITE support?

The DIN-A-MITE series supports multiple control inputs and firing modes, providing flexibility in power control. Available options include zero-cross switching for resistive loads and phase-angle firing for applications requiring finer power modulation. Control inputs can include 4-20 mA, 0-5 VDC, or contactor signal types depending on the specific model. Zero-cross firing is preferred for noise-sensitive environments, while phase-angle control offers smoother output for sensitive or inductive loads. Choosing the correct input and firing mode ensures compatibility with your PLC or process controller.

+ What are the mounting, safety, and certification features of the DIN-A-MITE series?

Watlow designed the DIN-A-MITE series for easy installation and compliance with industrial safety standards. Units can be DIN-rail or panel-mounted, and most are mercury-free to meet environmental compliance requirements. Each controller features a short-circuit current rating up to 200 kA when properly fused, offering strong arc-flash protection. Certifications include UL 508, C-UL, CE, and RoHS, making the series suitable for use in U.S. and Canadian industrial control panels. These safety and certification features help ensure regulatory compliance and long-term reliability in demanding production environments.

+ How do I choose the correct model number or configuration for my application?

Choosing the right DIN-A-MITE model requires confirming the application’s voltage, current, and phase requirements, as well as the control signal type and installation method. The ideal controller will match your heater load’s current draw with some margin for startup or transient conditions. Consider your control input type—whether analog or contact—and verify that it aligns with the controller’s firing mode. Also, check that the mounting style, heat dissipation requirements, and certifications align with your control panel design and local code requirements. Using Watlow’s configurator or consulting a distributor can help ensure you select the exact model needed.

+ What are common installation issues or best practices for the DIN-A-MITE?

Common installation issues usually involve undersized current selection, insufficient cooling, or improper fusing. To ensure reliable operation, verify that proper fuses are installed to maintain the rated short-circuit protection and allow adequate ventilation inside the control cabinet. Maintaining correct mounting orientation and wiring practices helps reduce heat buildup and ensures electrical safety. When installed correctly, the DIN-A-MITE provides dependable, efficient power control with minimal maintenance, making it a preferred choice for industrial heating systems throughout North America.

Download Watlow DIN-A-MITE® Power Controllers Series Brochure

Download Watlow DIN-A-MITE® Power Controllers Series Datasheet

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