Description
Core Product Summary
The Watlow DC10-12P0-0000 is a solid-state SCR power controller from the DIN-A-MITE Style C series, designed for precision thermal power regulation in single-phase industrial heating applications. Operating on line voltages from 100 to 120VAC with a single controlled leg, this unit replaces traditional mechanical and mercury contactors with solid-state switching execution.
Configured with Phase Angle firing, the module accepts a standard 4–20mA linear input signal to adjust effective AC power delivering smooth, continuous output to resistive loads. Built-in soft start functionality reduces initial current surges during cold-load startup. The module features integrated touch-safe compression terminals, a heat sink assembly, and mounting support for standard 35mm DIN-rail or panel backplate installation.
Key Technical Specifications
| Specification Parameter | Verified Value / Rating |
| Product Series | DIN-A-MITE Style C |
| Phase / Controlled Legs | 1-Phase, 1 Controlled Leg |
| Operating Line Voltage | 100 to 120 VAC (+10%, -15%), 50/60 Hz |
| Maximum Current Rating | Up to 55 A (dependant on ambient temperature and mounting) |
| Control Signal Type | Phase Angle Fired (Control Code ‘P’) |
| Input Command Range | 4 to 20 mA DC (250 Ω input impedance) |
| Output Firing Mode | Infinitely variable phase-angle firing with soft start |
| Power Dissipation | 1.2 Watts per Amp switched per controlled leg |
| Max Surge Current (16.6 ms) | 1,350 A peak |
| Max I^2t for Fusing | 9,100 A^2s |
| Off-State Leakage Current | 1 mA maximum at 25°C |
| Short Circuit Current Rating | 200 kA SCCR (when used with proper high-speed fusing) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
| Operating Humidity | 0 to 90% RH, non-condensing |
Detailed Product Overview
The Watlow DC10-12P0-0000 DIN-A-MITE Style C power controller provides solid-state power regulation for single-phase resistive heating processes. Designed to interface directly with temperature controllers, PLCs, and process instruments transmitting a 4–20mA analog control signal, the unit varies the output power delivered to the heating element.
Unlike zero-cross switching modules that turn full AC cycles on and off, the phase angle firing circuit in the DC10-12P0-0000 clips each half-cycle of the AC sine wave in response to the input signal. This provides proportional voltage and current control, making it suitable for applications requiring rapid power adjustment, low thermal inertia loads, or infrared heating elements. The integral soft start feature ramps power gradually upon energization to limit thermal shock and high inrush currents on cold-resistance heating elements.
The unit features touch-safe compression terminals to protect personnel during installation and maintenance. An integrated aluminum heat sink supports heat dissipation under normal operational airflow.
DC10-12P0-0000
DC10-12P0-0000
Dimensions, Mounting & Connection Notes
- Dimensions: Height: 3.7 in (94 mm) | Width: 3.12 in (79 mm) | Weight: ~1.56 lbs (0.7 kg).
- Mounting Options: Standard 35mm DIN-rail mount or direct back-panel mounting via four M4 (No. 8) screws.
- DIN Rail Clipping Distance: Minimum 34.8 mm (1.37 in), Maximum 35.3 mm (1.39 in).
- Input Control Terminals: Compression style accepting 0.2 to 1.5 mm^2 (24 to 16 AWG) wire. Tighten to 0.5 Nm (4.4 in-lb) using a 3.5 mm (1/8 in) flathead screwdriver. Strip length: 5.5 mm (0.22 in).
- Line and Load Terminals: Heavy-duty compression terminals accepting 2.5 to 25 mm^2 (14 to 3 AWG) wire rated for at least 75°C insulation. Tighten to 2.7 Nm (24 in-lb) using a 6.4 mm (1/4 in) screwdriver or Pozi driver.
- Maintenance Requirement: Retorque line and load connection terminals after the first 48 hours of operation to prevent wire cold flow, and periodically every 3 to 6 months thereafter.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Input Signal Source | 4–20mA DC process output from PLC or controller | Requires a 250 Ω input impedance drive capability. |
| Line Power Range | 100 to 120 VAC single-phase | Voltage tolerance range is 48 to 265 VAC limit for the series. |
| Load Type | Single-phase resistive heating elements | Phase angle mode requires direct line-to-load wiring on controlled leg. |
| Branch Circuit Protection | High-speed semiconductor fuses rated below 9,100 A^2s | Fusing is required to maintain the 200kA Short Circuit Current Rating (SCCR). |
| Alarm Output | No alarm option included (Option ‘0’) | Base model without auxiliary alarm contact outputs. |
FAQ
What is the Watlow DC10-12P0-0000?
It is a single-phase solid-state SCR power controller from Watlow’s DIN-A-MITE C series designed to modulate AC power to electric resistive heating loads.
What firing mode does this model use?
This model uses Phase Angle firing (designated by the ‘P’ in the part number), which alters the conduction angle within each AC sine wave to vary power smoothly.
What is the input control signal for the DC10-12P0-0000?
It accepts an analog 4 to 20 mA DC control signal with a 250 Ω input impedance.
What line voltage range does this unit support?
The unit is specified for 100 to 120 VAC single-phase power lines.
How is the DC10-12P0-0000 mounted inside a control enclosure?
It can be snapped directly onto a standard 35mm DIN rail or mounted directly to a panel backplate using four M4 (No. 8) screws.
Does this model include a built-in alarm output?
No, the “0000” suffix indicates standard configuration with no alarm output functionality.
Documented Performance Data
- Control Accuracy: Output power is directly proportional to the command signal within ±5% of span at 25°C ambient temperature.
- Temperature Stability: Less than 0.25% change per °C ambient temperature variation.
- Heat Generation: Dissipates approximately 1.2 Watts per switched Ampere of load current.
- Maximum Inrush Tolerance: 1,350 A peak maximum surge current capability for 16.6 milliseconds.
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