Watlow Din-A-Mite D power controller


Features and Benefits:

200KA SCCR with proper fusing

• Minimizes damage in the event of a short circuit

Standard panel mount

• Provides same mount as industry standard 100A MDR Compact size

• Reduces panel space and cost

Touch-safe terminals

• Increases safety for installer and user Mercury free

• Assures environmental safety

Faster switching with solid state

• Saves energy and extends heater life

UL® 508 listed, C-UL®, RoHS and CE with filter

• Meets applications requiring agency approval

• Reduces end product documentation

Back-to-back SCR design

• Ensures a rugged design

On-board semiconductor fusing

• Provides quick access with no extra mounting necessary



The DIN-A-MITE D silicon controlled rectifier (SCR) power controller provides an inexpensive, versatile product for controlling heat in an efficient package. This controller is designed and manufactured with the quality features expected from Watlow. The mounting footprint matches that of the industry standard mercury displacement relay (MDR), but 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. Combining the input of two or three controllers allows Control of three-phase loads. The controller is completely touch-safe and includes on-board, front- accessible, semiconductor fuses. Options include a current transformer for load current monitoring and a shorted output alarm. The controller is UL® 508, C-UL® and CE approved making it ideal for panels and cabinets that require agency approvals.

Variable time-base, 4-20mA process control and VAC/VDC input contactor options are available. All options are model number dependent and factory configurable. This power controller also includes 200KA short circuit current rating (SCCR) tested up to 480VAC to minimize damage in the event of a short circuit when used with required fusing.


Watlow Din-A-Mite D power controller is available to buy in increments of 1

Din-A-Mite D power controller





• See the Output Rating Curve below

• Max. surge current for 16.6ms, 1,800A peak

• Latching current: 500mA min.

• Holding current: 200mA min.

• Power dissipation is 1.4 watts per ampere switched including on-board fusing

• 200KA SCCR, Type 1 and 2 approved with the recommended fusing; see user manual


Line Voltage

• 24 to 48VAC units: 20VAC min. to 53VAC max.

• 100 to 240VAC units: 48VAC min. to 265VAC max.

• 277 to 480VAC units: 85VAC min. to 528VAC max.

• 277 to 600VAC units: 85VAC min. to 660VAC max.

• 50/60Hz independent ±5%


Control Mode, Zero Cross

• Control option C: VDC input, contactor output

• Control option K: VAC input, contactor output

• To increase service life, the cycle time should be less than three seconds

• Control option F: 4 to 20mA DC input, variable time-base control output


Control Input

• AC contactor: 24VAC ±10%, 120VAC +10/-25%, 240VAC +10/-25% @ 25 mA max. per controlled leg

• DC Contactor: 4.5 to 32VDC: max. current @ 4.5VDC is 8mA per leg

• Loop powered linear current 4 to 20mA DC: loop-powered, control option F0 only (requires current source with 8.0VDC available, no more than two DIN-A-MITE inputs can be connected in series)


Shorted SCR Alarm Option

• Alarm state when the input command signal off and a 15A or more load current is detected by the current transformer


Alarm Output

• Energizes on alarm, non-latching

• Triac 24 to 240VAC external supply with a current rating of 300mA @ 77°F (25°C)


Current Sensing

• On-board current transformer (CT), typically 0.2VAC output signal per ampere sensed into 1,000Ω load


Agency Approvals

• CE with proper filter:

204/108/EC Electromagnetic Compatibility Directive

EN 61326-1: Industrial Immunity Class A Emissions Not suitable for Class B emissions environment

2006/95/EC Low Voltage Directive

EN 50178 Safety Requirements

• UL® 508-listed and C-UL® File E73741

• 2011/65/EU RoHS


Control Input Terminals

• Compression: will accept 26 to 12 AWG (0.13 to 3.3 mm2) wire


Line and Load Terminals

• Compression: will accept 6 to 2 AWG (13.3 to 33.6 mm2) wire


Operating Environment

• Operating temperature range: -4 to 176°F (-20 to 80°C)

• 0 to 90% RH (relative humidity), non-condensing

• Vibration: 2 g, 10Hz to 150Hz, applied in any one of three axes

• Storage temperature: -40 to 185°F (-40 to 85°C)

• Insulation tested to 3,000 meters

• Installation Category III, pollution degree 2 Mounting

• Back-panel mounting; fits the same mounting pattern as a 100A, single-phase mercury displacement relay

• On-board semiconductor fusing Dimensions

• 7.3 in. (185 mm) high x 2.6 in. (66 mm) wide x 9.4 in. (239 mm) deep

• Weight: 6.5 lb (2.95kg)


Specifications are subject to change without notice.


Output rating curve



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