Watlow Din-A-Mite B power controller


Features and Benefits:

200KA SCCR with proper fusing

• Minimizes damage in the event of a short circuit

DIN-rail and panel mounting

• Provides versatility and quick, low-cost installation

Compact size

• Reduces panel space and cost

Touch-safe terminals

• Increases safety for installer and user

Single- and three-phase power

• Permits use in a variety of applications

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

Shorted output alarm (optional)

• Simplifies troubleshooting and reduces downtime



The DIN-A-MITE B power controller provides a low-cost, highly compact and versatile solid state option for controlling electric heat. This controller is designed and manufactured with the quality features Expected from Watlow. DIN-rail and panel mounting are standard on every control. There is no need to worry about mercury, the DIN-A-MITE controller is mercury free.

Features include single-phase and three-phase zero cross switching up to 40 and 22 amperes, respectively, 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.

Variable time-base, 4-20mA process control and VAC/VDC input contactor versions are available. A shorted output alarm option is also available. All options are model number dependent and factory configurable. This power controller 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.

Click to order - Fuses and Fuse Holders



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

Din-A-Mite B power controller




Operator Interface

• Control input and indication light

• Alarm output and indication light

Amperage Rating

• See the output rating curve

• Max. surge current for 16.6ms, 380A peak

• Max. I2t for fusing is 4,000A2s

• Latching current: 200mA min.

• Holding current: 100mA min.

• Off-state leakage 1mA at 77°F (25°C) max.

• Power dissipation = 1.2 watts per ampere per leg switched

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

Line Voltage

• 24 to 660VAC model number dependent; see ordering Information

Control Mode, Zero Cross

• Control option C: VDC input, contactor output

• Control option K: VAC input, contactor output

• To increase service life on contactor models, 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% @ 25mA max. per controlled leg

• DC contactor: 4.5 to 32VDC: max. current @ 4.5VDC is 6mA per leg. Add 2mA per LED used to the total current

• 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 10A or more load current is detected by the current transformer (two turns required for 5A and three turns for 2.5A)

Alarm Output

• Energizes on alarm, non-latching

• Triac 24 to 240VAC, external supply with a current rating of 300mA @ 77°F (25°C), 200mA @ 122°F (50°C), 100mA @ 176°F (80°C) and a holding current of 200 μA with a latching current of 5mA typical

Agency Approvals

• CE with proper filter:

204/108/EC Electromagnetic Compatibility Directive

EN 61326-1: Industrial Immunity Class A Emissions

2006/95/EC Low Voltage Directive

EN 50178 Safety Requirements

Installation category III, pollution degree 2

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

• 2011/65/EU RoHS

Control Input Terminals

• Compression: will accept 24 to 16 AWG (0.2 to 1.5 mm2) wire

Line and Load Terminals

• Compression: will accept 18 to 8 AWG (0.8 to 8.4 mm2) wire

Operating Environment

• See the output rating curve

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

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

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

• Insulation tested to 3,000 meters

DIN-rail Mount

• DIN EN 50022, 35 mm by 7.5 mm

Back-Panel Mount

• Four mounting holes No. 6 to No. 8 (M3 to M4) fastener


• 3.7 in. (94 mm) high x 3.3 in. (83 mm) wide x 4.9 in. (124 mm) deep

• Weight: 1.5 lb (0.68kg)

Specifications are subject to change without notice.


Output Rating Curve image


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