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Home > Products > Industrial DC Power > Rectifiers > Series 70 AutoCoat MAC Rectifier (100 V – 450 VDC, 200 A – 400 A)

Series 70 AutoCoat MAC Rectifier (100 V - 450 VDC, 200 A - 400 A)

Our Series 70 AutoCoat rectifier has a front access, single transformer, secondary thyristor design, which can be used as both a standalone rectifier or in a Modular Anode Control (MAC) system. Offered in two models, the Model 706 (utilizing a 6-pulse SCR configuration) and the Model 7012 (utilizing a 12-pulse SCR configuration), the Series 70 AutoCoat is available with DC output ratings of 400V – 450V and 200A – 400A.

Compatible with today’s advanced e-coat processes, the Series 70 AutoCoat rectifier is specifically designed for automotive and general e-coat applications which require greater voltage and current control of each anode. Designed for optimum, reliable performance in harsh industrial environments, the Series 70 AutoCoat rectifier is an ideal choice for MAC e-coat applications, as well as smaller single rectifier systems.

Read more! Get our free whitepaper which discusses MAC rectifier systems used in both continuous conveyor and batch e-coat processes!


  • Automotive and general e-coat systems
  • Metal finishing applications

Product Specifications

Features and Benefits

  • Small footprint
  • Front-access system; back or side access and clearance are not required
  • Built-in anode monitoring
  • Extensive set of standard controls and monitoring (Optional local or remote controls are available to suit almost every application – consult factory.)
  • Dedicated outputs – up to (2) for 200A, (4) for 400A (Consult factory for other configurations.)
  • AC distribution systems are available for easy installation
  • Flexibility to use PLC’s from various manufacturers
  • Flexible PLC distributed I/O configurations

Performance Specs

  • Input Voltage: Standard 208V, 240V, 480V or 600V; 3 phase
  • Input Line Variation: ± 5% from nominal
  • DC Output Voltages: 400V – 450V
  • DC Output Current Ratings: 200A or 400A
  • In reference to the four bullets above, consult factory for other optional input voltages, input line variations, output voltages, and output current ratings.
  • Frequency: 60 Hz; optional 50 Hz
  • Efficiency: 95% typical; size dependent and at full load
  • Power Factor: 0.90 typical, at full output
  • % AC Output Ripple: Model 706 – 5% when operating within 25% to 100% of full voltage and current
  • % AC Output Ripple: Model 7012 – 1% when operating within 25% to 100% of full voltage and current
  • Voltage Regulation: ± 0.5%
  • Current Regulation: ± 0.5%
  • Ambient Temperature: 0° C (32° F) to 40° C (104° F) maximum
  • Humidity: 95% non-condensing
  • Elevation: Maximum elevation 1524 meters (5000 feet) without de-rating

Frequently Asked Questions

Can the Series 70 AutoCoat be used in a 1- or 2-zone standard e-coat system configuration?

Yes! The Series 70 AutoCoat is available in a standard model, which has controls for a conventional monorail or batch type e-coat configuration, plus a single-output bus for connection to multiple anodes.

Does the Series 70 AutoCoat offer PLC control and monitoring?

Yes! The Series 70 AutoCoat may be provided with internal distributed I/O modules, which allow communication with a PLC that digitally controls and monitors multiple rectifiers at one time (e.g., in an MAC system). Whether provided by Controlled Power Company or another manufacturer, this PLC can also communicate with a manufacturing plant’s PLC or centralized monitoring system for expanded monitoring and control.

Do I need a separate anode monitoring system in an MAC system with the Series 70 AutoCoat?

No. The Series 70 AutoCoat has built-in current sensing for each output that is connected to the tank. The current values can be sent either over Ethernet / Serial connections with distributed I/O or analog 4-20mA signals.

How can I reduce or eliminate downtime?

Purchasing and installing a second backup rectifier connected in parallel with the existing rectifier and a DC switch, will virtually eliminate downtime. In this scenario, if a rectifier happens to go down or is being serviced, a backup unit can be brought online within a few minutes. For more information, see our Options document entitled u0022DC Transfer Switchesu0022 for details about DC switch and backup rectifier configurations.

How can I reduce the floor space needed for rectifiers used in my process?

Controlled Power Company is able to custom design rectifier cabinets for limited floor space or single side access. We are also able to provide multiple rectifiers in a single enclosure.

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