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Power Switching Devices

Power switching devices, such as stand-alone power controllers, deliver power to electric heaters and other loads when current and voltage requirements exceed the capabilities available in discrete temperature and process controllers. These devices perform supervisory and diagnostic functions to identify overload conditions, open and short circuits or other unsafe operating conditions. Watlow’s solid state power switching devices work in combination with Watlow’s PID temperature controllers to maximize process control, load performance and heater life.
 
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DIN-A-MITE A Power Controller

DIN-A-MITE® A Power Controller

The DIN-A-MITE® A power controller is designed and manufactured with quality features expected from Watlow. DIN-A-MITE A capabilities include single-phase zero-cross switching up to 25 amperes at 600VAC (see rating curve). A unique integrated design removes the guesswork associated with selecting a proper heat sink and adequate terminations for the application. DIN-rail and back panel mounting is standard on this family of controllers. The DIN-A-MITE is also mercury free.

Variable time base, 4-20mA process control or VAC/VDC input contactor versions are 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 prevent ...


DIN-A-MITE B Power Controller (PG 105)

DIN-A-MITE B Power Controller

The DIN-A-MITE B power controller provides a low-cost, highly compact and versatile solid state option for controlling electric heat. The DIN-A-MITE B capabilities include single-phase and three-phase zero-cross switching up to 40 and 22 amperes, respectively at 600VAC (see rating curve). This controller's design includes proper heat sinking and terminations simplifying integration into applications. DIN-rail and back panel mounting is standard on this family of controllers. The DIN-A-MITE controller is also mercury free.

Variable time base, 4-20mA process control or VAC/VDC input contactor versions are available. A shorted silicon controlled rectifier (SCR) alarm option is also available. All options are model number dependent and ...


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DIN-A-MITE C Power Controller

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 and standard panel mounting plus a cabinet thru-wall mount version are available.

Basic 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 ...


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DIN-A-MITE D Power Controller

The DIN-A-MITE D silicon controlled rectifier (SCR) power controller provides an inexpensive, versatile product for controlling heat in an efficient package. This controller is designed and manufactured with the quality features expected from Watlow. The back panel mounting matches the footprint of the industry standard mercury displacement relay. There is no need to worry about mercury, the DIN-A-MITE controller is mercury free.

The DIN-A-MITE Style D is capable of zero-cross switching up to 100 amperes single-phase, at 600VAC at 86ºF (30ºC), depending on the model selected. When combined the input of two or three controllers you can control three-phase. It is totally touch-safe and includes standard back panel mounting, on-board ...


POWER SERIES™ Solid State power Controllers (PG 119)

POWER SERIES™ Solid State power Controllers

Watlow has manufactured solid state power controllers for over forty years. Watlow's POWER SERIES™ is a microprocessor-based product that features application flexibility unmatched by any other silicon controlled rectifier (SCR) power controller on the market today.

Watlow's POWER SERIES controllers include single and three-phase models from 65 to 250 amperes. Field configurable phase-angle or zero-cross firing improves application flexibility on site where needed.

50/60Hz independent operation allows utilization almost everywhere in the world without special calibration considerations. Serial communication via Modbus® RTU allows setup and monitoring of load status from a computer station or control room.

On-board ...


 QPAC Modular Silicon Controlled Rectifier Power Controller

QPAC Modular Silicon Controlled Rectifier Power Controller

The QPAC from Watlow is a modular silicon controlled rectifier (SCR) power controller with plug-in features for flexibility. Bases are rated from 150 to 1000 amperes in one-phase, three-phase, two leg and three-phase, three leg.

A variety of transformers from 120 to 575VAC, along with 50/60Hz operation, enable the QPAC to operate in applications anywhere. Plug-in control cards set the QPAC’s SCR firing modes: solid state contactor, burst firing (zero cross) or phase-angle models and are available with a wide variety of options. High speed fuses are included to protect the SCR from short circuit currents. 200KA short circuit current rating (SCCR) prevents arc flash.


E-SAFE® II Hybrid Power Switch (PG 127)

E-SAFE® II Hybrid Power Switch

The E-SAFE® II hybrid power switch provides reliable and accurate power switching up to 35 amperes at 158ºF (70ºC). This mercury-free product is specifically designed to operate in the higher ambient temperatures of foodservice applications.

Utilization of mercury relays is being eliminated due to many regulations affecting its use in the United States and around the world to replace mercury-relay switches. The E-SAFE II is the best performing product at the most economical price. Because of the product's unique design, there is no need to purchase costly heat sinks used with traditional solid state relays (SSRs). In addition, since this is a three-phase device, there is no need to wire multiple command signals. With a switching ...


Series CZR Solid State Relay (PG 130)

SERIES CZR Solid State Relay

The SERIES CZR solid state relay provides a low-cost, highly-compact and versatile solid state option for controlling electric heat. With DIN-rail and back panel mounting standard on every controller, the CZR allows for simple and quick installation.

The extensive capabilities of the SERIES CZR include single-phase, 18 to 42 ampere zero-cross switching up to 600VAC (see output rating curve). It's unique integrated design removes the guesswork associated with selecting a proper heat sink and precise terminations for the application.

This controller holds many agency certifications and is ideal for applications that require UL®, CSA and CE approvals. The SERIES CZR is available in VAC/VDC input contactor versions and all ...


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Solid State Relays

Watlow solid state relays (SSR) offer many of the advantages of solid state power controllers, but at a lower cost. Watlow's extensive knowledge in power controller design led to the development of a special fast cycle input card that enables a SSR to operate from a standard 4-20mA instrumentation command signal. Test results show that a zero-cross SSR in combination with the fast cycle card promotes better temperature control and longer heater life than slow cycle relays. Through a time proportional cycle rate of 1/10 of a second, heater life will be extended.

Both low and high voltage models are available from 24 to 660VAC. All ac output models include back-to-back silicon controlled rectifiers (SCRs) for a more rugged design than ...


EZ-ZONE® ST Integrated Solid State Controller (PG 23)

EZ-ZONE® ST Integrated Solid State Controller

The EZ-ZONE® ST integrated solid state controller from Watlow®, offers a complete thermal system control solution in a single package. Features include a PID temperature controller connected to a high-amperage solid state relay with the option of adding a properly sized heat sink, an over- and under-temperature limit, a power shut-down contactor and digital communications in one complete and professionally engineered product.

Because the system is modular and scalable, a user only pays for what is needed. Stacking the EZ-ZONE ST integrated controller into multiple configurations enables flexibility to standardize the product platform to solve a wide range of application needs.