Watlow Din-A-Mite C 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

One- and three-phase power

• Can be used in a variety of applications

Open heater/shorted output alarm

• Notifies the user in case of an open heater or shorted output

Mercury free

• Assures environmental safety

Faster switching with solid state

• Saves energy and extends heater life

UL® 508 listed, C-UL®, RoHS 2 and CE with filter

• Meets applications requiring agency approval

• Reduces end product documentation cost

System solution component

• Provides single source thermal loop

Back-to-back SCR design

• Ensures a rugged design



The DIN-A-MITE® C silicon controlled rectifier (SCR) power controller provides a low cost, 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, panel mount and through-wall mount versions are available.

Features 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 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.

Phase Cooling Current at 122°F (50°C)
1 0 55A
1 T 60A
1 1,2,3 75A
2,8 1,2,3 75A
2,8 0 40A
2,8 T 46A
2,8 1,2,3 65A
3,9 0 30A
3,9 T 35A
3,9 1,2,3 55A

Click to order - Fuses and Fuse Holders


Note (For Control Options L and P) (single-phase only)*Not CE approved for conducted or radiated emissions.


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

Din-A-Mite C power controller



Operator Interface

• Control input and indication light

• Alarm output and indication light

• Current limit indication LED

Amperage Rating

• See output rating curves on the next page

• Max. surge current for 16.6ms, 1,350A peak

• Max. I2t for fusing is 9100A2s

• Latching current: 500mA max.

• Holding current: 200mA max.

• Fan current: 0.14A for 24VDC; 0.12A for 120VAC; 0.06A for 240VAC

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

• Power dissipation: 1 watt per ampere per leg switched

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

Line Voltage

• 24 to 48VAC units: 20.4VAC min. to 53VAC max.

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

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

• 100 to 120VAC, 200 to 208VAC, 230 to 240VAC, 277VAC, 400VAC, 480VAC, 600VAC, +10/-15%, 50 to 60Hz independent ±5% (control options L, P and S)

Alarms (zero cross models only)

Shorted SCR Alarm Option

• Alarm state when the input command signal is 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)

Open Heater Alarm Option (Control Option S only)

• Alarm state when the input command signal is on and the load current detected by the current transformer is 20% less than customer adjusted set point

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 200µA 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 not suitable for Class B environments

Phase angle and phase angle with current limit (control options P and L) are not CE approved for conducted or radiated emissions

2006/95/EC low voltage directive EN 50178 safety requirements

installation category III, pollution degree 2

• UL® 50 Type 4X enclosure, Class 1, Div. 2 per ANSI/ISA 12.12.01.

Through-wall heat sink models T4 File 184390

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

• 2011/65/EU RoHS 2

• Shock and vibration tested to IEC 60068-2-32

• Vibration tested to IEC 60068-2-6

Control Input Terminals

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

• Torque to 4.4 in. lb (0.5 Nm) max. with a 1/8 in. (3.5 mm) blade screwdriver

Line and Load Terminals

• Compression: will accept 14 to 3 AWG (2.5 to 25 mm2) wire

• Torque to 24 in. lb (2.7 Nm) max. with a 1/4 in. (6.4 mm) blade screwdriver, or a type 1A, #2 Pozi driver

Operating Environment

• See the output rating curve chart on next page

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

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

• Operating temperature: -29 to 176°F (-34 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

Through-Wall Mount

• See below for through-wall panel cutout (Note: Mount cooling fins vertically.)


Additional Specifications for Contactors and Proportional Controllers:


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)

Additional Specifications for Phase Angle, Phase Angle Current Limit and Single-Cycle Variable Time-Base:



• With control option S (single-cycle, variable time-base) the output is not on for more than one consecutive AC cycle below 50% power and not off for more than one consecutive AC cycle above 50% power

• Phase angle control, single-phase only

Control Input

• 0 to 20mA, 4 to 20mA, 0 to 5VDC, 1 to 5VDC and 0 to 10VDC

• Input impedance 250! for 4mA to 20mA, 5k! for linear voltage input

Output Voltage

• 100 to 120VAC, 200 to 208VAC, 230 to 240VAC,

277VAC, 400VAC, 480VAC and 600VAC, ±10%

Linearity (Control Option S)

• ±5% input to output power over 0 to 100% of span between calibration points

Linearity (Control Options P and L)

• ±5% input to output power, as referenced to a sinusoidal power curve, between calibration points


• Better than 0.1% of input span with respect to output change

Soft Start (Control Options P and L)


• 5 seconds soft start on power up

• Soft start on thermostat overtemperature

• Soft start on 1/2 cycle drop out detection

• 1 second soft start on set point change


• Manual control kit (1k! potentiometer) 08-5362

• Alarm option is not available on control options P or L

Specifications are subject to change without notice.


Din-A-Mite C Power Controller-output rating curve


Dimensions—Natural Convection, DIN-rail/Panel Mount


Dimension fan cooled


Dimensions& Natural Convection, DIN-rail/Panel Mount


Extended Heater and Power Controller Life with Variable Time-Base:

With variable time-base control, the power controller automatically adjusts the time-base and output power with respect to the command signal. Accelerated life testing shows that variable time-base control significantly reduces expansion and contraction of the heater element. This extends heater and power controller life while improving process temperature control. This saves money on heaters, downtime and maintenance.


Loop-Powered or Transformer Powered:


By using a temperature controller’s 4-20mA process output signal as the power supply for the DIN-A-MITE input, the cost of the power controller can be reduced. With control option F0 the 4-20mA control signal simultaneously powers the DIN-A-MITE’s internal electronics and provides the input command signal.


DIN-A-MITE controllers with single-cycle, variable time-base or phase angle outputs (control options L, P and S) detect the power line zero cross with a transformer that also powers their internal electronics. These units can be controlled manually with a potentiometer or automatically with a temperature controller using any of the control options: 4-20mA, linear voltage (0-5, 1-5 and 0-10VDC).


Loop-Powered, Variable Time-Base Output:

Loop-Powered, Variable Time-Base Output:


Phase Angle Output:

Phase Angle Output

Phase angle control (control options L and P) is infinitely variable over the period of the AC sine wave. It provides a variable voltage and/or current output. The phase angle circuitry is transformer powered and accepts a linear voltage, current or potentiometer input.


Single-Cycle, Variable Time-Base Output:

Single-Cycle, Variable Time-Base Output

With single-cycle, variable time-base control, at 50 percent power, the output is on for one cycle and off for one cycle. At 25 percent, it is on for one cycle and off for three cycles. Under 50 percent, the output is not on for more than one consecutive cycle; over 50 percent the output is not off for more than one consecutive cycle.



More Information
Write Your Own Review
You're reviewing:Watlow Din-A-Mite C power controller
Your Rating

  • 510 606-1012

    Round-the-clock free hotline (24/7)
  • Return & Exchange

    You can return or exchange the item within 14 days.
  • Satisfaction Guarantee

    We are committed to your satisfaction with every order.
To Top