Digital guide
You are here:
Watlow DC10-12P0-0000
Product Name: Watlow DIN-A-Mite C 55 A SCR Power Controller
Product Introduction
The Watlow DC10-12P0-0000 is a single-phase solid-state power controller designed to regulate electric heating loads. It receives a 4–20 mA control signal and adjusts power delivery to resistive heating elements using phase-angle firing.
Detailed content
Technical Specifications
Brand: Watlow
Model: DC10-12P0-0000
Product Family: DIN-A-Mite C / DC10
Product Type: SCR power controller
Phases: Single-phase
Controlled Legs: One
Line/Load Voltage: 100–120 VAC
Continuous Current Rating: 55 A
Control Signal: 4–20 mA
Firing Mode: Phase-angle control
Short-Circuit Current Rating: 200 kA
Cooling Method: Natural convection
Ambient Temperature: 0–50 °C
Storage Temperature: -40–85 °C
Enclosure Rating: IP30
Mounting Options: DIN rail, panel mount, or wall/pass-through mount
Design Feature: Mercury-free construction
Functional Features
Proportional Power Control: Adjusts heater power in response to the 4–20 mA control signal.
Phase-Angle Firing: Provides continuous voltage control for suitable heating loads.
Heater Open Alarm: Detects certain open-heater conditions.
Short-Circuit Alarm: Detects output short-circuit conditions.
Touch-Safe Terminals: Improves safety during wiring and inspection.
Mercury-Free Design: Replaces older mercury contactor technology in applicable applications.
Application Scenarios
Industrial heating: Plastic extrusion and thermoforming
Ovens and furnaces: Industrial ovens, curing ovens, and environmental chambers
Packaging: Heat sealing and shrink-tunnel equipment
Process heating: Control panels and electric process heaters
Food and manufacturing: Compatible heating applications requiring phase-angle control
Material Composition
Heat Dissipator: Aluminum or steel heat-transfer structure
Power Semiconductor: Silicon-controlled rectifier
Enclosure: Flame-retardant housing components
Terminals: Touch-safe wiring terminal assembly
Structural Characteristics
Compact Power Unit: Integrates SCR, heat dissipator, protection circuitry, and connection points.
Passive Cooling: Relies on natural convection; no internal fan in the base design.
Flexible Mounting: Supports DIN-rail, panel, or wall/pass-through installation.
Control Interface: Separate terminals for line, load, and 4–20 mA control wiring
Working Principle
The controller receives a 4–20 mA process signal from a temperature or power controller. Its internal circuitry generates SCR gate signals to control conduction during each AC half-cycle. By adjusting phase-angle firing, the controller changes the average voltage and power delivered to the heating load.
Installation Requirements
Voltage Limit: Use only on 100–120 VAC line/load circuits.
Mounting: Install on a 35 mm DIN rail, panel, or compatible surface.
Ventilation: Maintain clearance for natural convection around the heat dissipator.
Conductor Sizing: Select cables and fusing for 55 A continuous operation.
Fusing: Use semiconductor-rated short-circuit protection to preserve the published 200 kA rating.
Control Signal: Verify that the controller output is configured for 4–20 mA current-loop operation.
Usage Precautions
AC Voltage Only: Do not apply line voltages above the 120 VAC rating.
Disconnect Power: De-energize the circuit before wiring or servicing the controller.
Surge Protection: Evaluate inductive or nonlinear loads for applicable suppression and rating requirements.
Maintenance: Periodically inspect and clean the heat dissipator.
Alarm Logic: Configure open-heater and short-circuit alarms within the connected control system.
