new MAYR motor brake rectifier ROBA-switch 20/017.000.2

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What Is the MAYR ROBA-switch 20/017.000.2 Motor Brake Rectifier?

The MAYR ROBA-switch 20/017.000.2 is a specialized rectifier module designed to power and control electromagnetic spring-applied safety brakes on industrial motors. When a three-phase motor is switched off, the ROBA-switch converts the residual AC supply into DC voltage to energize the brake coil, releasing the brake so the motor can rotate freely. When power is removed, the brake springs engage, bringing the load to a controlled stop — a critical safety function in cranes, hoists, elevators, and machine tools.

In short: If your motor brake needs reliable rectification with fast switching response, this MAYR ROBA-switch is the OEM-quality component you need — available now at koeed.com with worldwide delivery.

How the ROBA-switch Improves Brake Performance

Motor brakes controlled by conventional rectifiers suffer from slow engagement times because the brake coil takes time to discharge its stored magnetic energy. The ROBA-switch solves this by actively switching the circuit on both the AC and DC sides, achieving significantly faster brake engagement — often within milliseconds of power removal. This is especially important in vertical-axis applications (hoists, elevators) where even a brief delay in braking can cause the load to drop.

MAYR is the global leader in safety brake technology, and the ROBA-switch series is engineered to work seamlessly with MAYR ROBA-stop, ROBA-torque, and ROBA-disk brake families. Using a genuine MAYR rectifier ensures the brake receives the correct excitation voltage and switching timing, which extends brake lining life and prevents coil overheating.

Technical Specifications

For complete wiring diagrams and installation instructions, refer to the official MAYR ROBA-switch documentation or contact KOEED technical support.

Frequently Asked Questions

Will this ROBA-switch work with my existing motor brake, even if it is not a MAYR brand?

The ROBA-switch 20/017.000.2 is designed primarily for MAYR brake families. It can technically function with other brands of DC electromagnetic brakes if the voltage and current specifications match, but we strongly recommend verifying compatibility. Key parameters to check: the brake coil's rated DC voltage, the coil's inrush and holding current, and the required switching speed. Using a mismatched rectifier can cause brake overheating, slow engagement, or premature coil failure. If you are unsure whether this part suits your application, send your brake model details to us via the Request for Quote page.

How do I wire this rectifier into my motor control circuit?

The standard wiring arrangement connects the ROBA-switch AC input terminals to the motor supply side (so it receives power whenever the motor is energized). The DC output terminals connect directly to the brake coil. When the motor contactor closes, the ROBA-switch immediately rectifies the AC to DC and applies it to the brake coil, releasing the brake. When the contactor opens, the ROBA-switch actively interrupts the DC circuit for fast brake engagement. Always consult the manufacturer's wiring diagram for your specific brake model — incorrect wiring can prevent the brake from releasing or cause it to drag. For detailed pinout information, check the KOEED FAQ for documentation request procedures.

My brake is buzzing and overheating — could the rectifier be the problem?

Yes, a failing or incorrect rectifier is a common cause of brake overheating and audible hum. If the rectifier output is not smooth DC (ripple or half-wave instead of full-wave rectification), the brake coil will vibrate at mains frequency, generating both noise and excess heat. Other symptoms of rectifier failure include intermittent brake release, slow engagement, or a brake that fails to hold rated torque. Before replacing the brake itself, test the rectifier output with a multimeter on DC voltage mode — a healthy rectifier should produce a stable DC voltage close to the brake's rated coil voltage. Search for compatible parts across our full product range.

Is this product new or refurbished, and what warranty do you offer?

This is a brand new, genuine MAYR ROBA-switch 20/017.000.2 — not a refurbished, salvaged, or third-party clone. We source directly from authorized MAYR distribution channels to guarantee authenticity. Every product from koeed.com includes our standard warranty. If you encounter any functionality issue upon installation, we will arrange a replacement or credit. We recommend testing the rectifier with a bench power supply and brake simulator before integrating it into a production machine. Visit the FAQ page for full warranty terms.

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