This is a single phase SCR power regulators and temperature controllers 2 in 1 units, in a typical heating system, you would need a temperature controller and a SCR power regulators, and they are two separate devices, we go further and build this two devices in one package, this saves a lot of efforts for panel builders when it comes down to wiring, and RS-485 modbus is a standard feature, controller can be integrated to systems with HMI or PLC etc. the load can be directed wired to this thyristor power regulators, and it works with all kinds of inputs, Thermocuple, RTD, analog signal

● Potentiometer input SCR
● 500K, 1000K potentiometer
● 24~480Vac load
● From 10 amps up to 120 amps
● 500K for 220Vac
● 1000K for 480Vac

● Analog input single phase SCR
● 0-10Vdc, 4-20mA input
● 220VAC, 380Vac load
● From 10 amps up to 120 amps
● Phase firing control mode

The Maxwell MS-1VD2238 Series is a highly cost-effective, high-accuracy single-phase isolated SCR power regulator designed for precise phase angle control. Featuring a versatile multi-input design, this advanced thyristor module simultaneously supports 0-5Vdc, 0-10Vdc, 4-20mA, and potentiometer control signals without requiring hardware modifications. Engineered with optical isolation between the input and output circuits, it ensures maximum operational safety and signal integrity. Available in a wide current range from 10A to 200A for both 220Vac and 380Vac loads, the MS-1VD2238 series incorporates a built-in soft start circuit and an internal buffer (snubber) to protect against voltage surges. Housed in a durable, fire-retardant enclosure with resin sealing, this panel-mounted regulator is the ideal solution for controlling resistive heating elements in demanding industrial environments.

● Single phase high accuracy SCR
● 0-10V/4-20mA/0-5V/Potentiometer input
● 220Vac or 380Vac load
● From 40 amps up to 200 amps
● Phase angle firing control

● Single phase high accuracy SCR
● Support all kinds of analog signal
● 220Vac or 380Vac load
● From 40 amps up to 200 amps
● Phase angle firing control

● Single phase high accuracy SCR
● 0-10V/4-20mA/0-5V/Potentiometer input
● 220Vac or 380Vac load
● From 40 amps up to 200 amps
● Phase angle firing control

The Maxwell SCR20CA Series is a highly integrated, single-phase AC power controller designed for advanced feedback control and precise voltage regulation. Built around a high-power thyristor (SCR) chip, this compact unit incorporates a digital phase-shift control circuit alongside highly accurate output voltage and current measurement systems. A standout feature of the SCR20CA is its multi-functionality: users can seamlessly switch between constant voltage, constant current, and constant power control modes directly via the digital panel or communication interface. Equipped with true RMS sampling and a fully isolated measurement system, it ensures safe and reliable operation. With built-in RS-485 Modbus RTU communication, pluggable control terminals, and comprehensive protection mechanisms, the SCR20CA is an ideal solution for modern, automated industrial heating and power control applications.

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.

● Three phase SCR power regulator
● Universal input, supports all analog input
● 24~440Vac load, cost effective
● From 25 amps to 200 amps
● Ideal for resistive load
● MS-3VD3825C,MS-3VD3840C,MS-3VD3860C
● MS-3VD3880C,MS-3VD38100C,MS-3VD38120C

SCR-51 series is a compact design cost effective three phase SCR power regulator, works perfectly for resistive load. With built-in heatsink and cooling fans.  Makes it very easy to use. Load option starts from 40 amps all the way up to 100 amps,  with a built-in overheat thermo protection to make your system always protected. Clear digital display for temperature and input/output indication.

- Three phase SCR power regulator
- 0-10V,4-20mA,0-5V,potentiometer input
- 24~480Vac load
- 40amps,60amps,75amps,100amps
- Digital LED display
- Ideal for resistive application

The SCR-6 Series is a high-performance, three-phase intelligent digital power regulator designed for precise control of resistive loads in industrial heating applications. Featuring a compact design with an integrated heatsink and cooling fans, the SCR-6 offers a reliable and cost-effective solution for thermal process automation.

The Maxwell SCR-7 Series is an advanced, three-phase intelligent digital power regulator designed for precise and reliable control of resistive heating loads in industrial applications. Engineered with a fully integrated design, it combines the SCR module, high-efficiency heatsink, and cooling fans into a single, compact unit. The SCR-7 series features a comprehensive digital display for real-time monitoring of output ratio, temperature alarms, and phase status. With support for multiple analog input signals (including 4-20mA, 0-10VDC, and 0-5VDC) and optional RS-485 Modbus RTU communication, it seamlessly integrates into modern PLC and automated control systems. Built-in protective features such as soft start, auto phase detection, and over-temperature alarms ensure maximum safety and longevity for both the regulator and the connected load.

● Three phase SCR power regulator
● Universal input, supports all analog input
● 24~480Vac load
● 40amps,60amps,75amps optional
● Digital LED display
● Ideal for resistive application

Three-Phase Intelligent SCR Power Regulator