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Single-phase AC voltage regulator module

SCR Series Single-Phase AC Voltage Regulator Module

The Maxwell SCR-480H Series is a compact and highly reliable single-phase AC voltage regulator module designed for precise phase angle control. Utilizing a 0-10VDC analog input signal, this module allows for smooth, stepless adjustment of AC load voltage up to 480VAC. Engineered with advanced zero-crossing detection and optocoupler isolation, it ensures safe and interference-free operation between the low-voltage control circuit and the high-voltage power circuit. Available in a wide range of current ratings from 25A to 120A, the SCR-480H features a robust, space-saving design with pluggable terminal blocks for effortless wiring and maintenance. When paired with Maxwell's dedicated heatsinks, it delivers exceptional thermal performance, making it an ideal open-loop power control solution for both resistive and inductive industrial loads.

Brand:
PIDMaxWell
Item no.:
SCR-480H25P
Payment:
T.T, Credit Card, Paypal etc, to be negotiate
Market price:
$30
Price:
$20
Product origin:
Made in China
Min order:
10 PCS
Product weight:
0.2kg
Lead Time:
14 days after payment confirmed

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Key Features

Precise Phase Angle Control	Delivers smooth, stepless AC voltage regulation via a standard 0-10VDC analog control signal, enabling accurate and responsive power adjustment.
Wide Current Range	Available in six current ratings — 25A, 40A, 60A, 80A, 100A, and 120A — to accommodate a diverse range of load requirements.
Optocoupler Isolation	Full optocoupler isolation between the control and power circuits ensures maximum operational safety, signal integrity, and EMI immunity.
Pluggable Terminal Blocks	Green pluggable screw terminal blocks for control inputs significantly reduce installation and maintenance time, ideal for OEM panel builders.
Compact Module Design	Space-saving footprint designed for easy panel mounting or direct integration with Maxwell's range of compatible external heatsinks.
Versatile Load Compatibility	Highly effective for controlling both resistive heating elements (furnaces, ovens) and inductive loads (motors, transformers, fans).
Visual Status Indication	Built-in LED indicator provides clear, real-time visual feedback of the output operating status for quick diagnostics.
CE Certified	Manufactured to strict quality and safety standards, ensuring reliable and compliant performance in demanding industrial environments.

Technical Specifications

Parameter	Specification
Product Category	Phase Angle Controller / AC Voltage Regulator Module
Load Voltage Range	24 ~ 480VAC (50/60Hz)
Load Current Options	25A / 40A / 60A / 80A / 100A / 120A
Control Signal Input (VCON)	0-10VDC Analog Signal
Control Power Supply (VDD)	10-32VDC
Control Type	Phase Angle Control (Open-loop)
Isolation Method	Optocoupler Isolation
Operating Temperature	-25°C to +70°C (Thermal derating required above 25°C)
Storage Temperature	-40°C to +85°C
Operating Humidity	5% ~ 95% RH (Non-condensing)
Mounting Method	Panel mount / Heatsink mount (2 × M4 screws, 47.5mm hole spacing)
Terminal Torque (M3)	0.58 ~ 0.98 N·m
Terminal Torque (M4)	0.98 ~ 1.37 N·m
Certification	CE

The ordering code follows the format: SCR – 480H – [Current] – [Control Signal]

Code Segment	Description	Options / Value
SCR	Product Series	SCR Series Voltage Regulator Module
480H	Load Voltage	480H: Up to 480VAC load voltage
25 / 40 / 60 / 80 / 100 / 120	Rated Load Current	25: 25A \| 40: 40A \| 60: 60A \| 80: 80A \| 100: 100A \| 120: 120A
P	Control Signal Type	P: 0-10VDC Analog Input

Complete Ordering Code List:

Code	Description
SCR-480H25P	25A, 480VAC, 0-10VDC input
SCR-480H40P	40A, 480VAC, 0-10VDC input
SCR-480H60P	60A, 480VAC, 0-10VDC input
SCR-480H80P	80A, 480VAC, 0-10VDC input
SCR-480H100P	100A, 480VAC, 0-10VDC input
SCR-480H120P	120A, 480VAC, 0-10VDC input

Compatible Heatsinks

To ensure optimal thermal performance and prevent overheating, the SCR-480H module must be mounted on an appropriate heatsink. Maxwell offers the following compatible models:

Model	Dimensions (W×D×H)	Cooling Type	Recommended Use
MW-A50-1	66.5 × 50 × 86 mm	Passive (No Fan)	Standard duty; suitable for 25A–40A applications
MW-D1 10	106 × 50 × 86 mm	Passive (No Fan)	High-capacity passive; suitable for 60A–80A applications
MW-I93-D-A	108 × 95 × 55 mm	Passive (No Fan)	Heavy-duty passive; suitable for 80A–100A applications
MW-I93-B24DC	148.5 × 95 × 53 mm	Active (24VDC Fan)	Fan-cooled; recommended for 100A–120A high-duty-cycle applications

Click on below link to download catalog, user manual for SCR-480H25P/SCR-480H40P

SCR-480H25P Catalog

The SCR-480H series phase angle controller is highly versatile and widely utilized across various industrial sectors requiring precise, open-loop power regulation. It is an excellent choice for industrial heating applications, including plastic extrusion barrels, injection molding machines, packaging equipment, and small-to-medium industrial ovens. Beyond heating, its ability to handle inductive loads makes it suitable for AC motor speed control (such as fans and blowers), lighting dimming systems in commercial or theatrical settings, and primary-side voltage regulation for industrial transformers. Its compact size and pluggable wiring make it particularly favored by OEMs building automated control panels and custom machinery.

Industrial electric furnaces, ovens, and heat treatment equipment
Plastic extrusion barrel and injection molding machine heating zones
Packaging, sealing, and labeling machine heater control
AC motor speed control for fans, blowers, and pumps
Commercial and theatrical lighting dimming systems
Industrial transformer primary-side voltage regulation
Infrared heating and radiant panel systems
Food processing and drying equipment
Semiconductor and electronics manufacturing heating processes
OEM control panels and custom industrial automation machinery

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