The Mayr ROBA-switch Size 10 Fast Acting Rectifier is an intelligent electromagnetic control unit engineered and manufactured by Mayr Power Transmission (Germany) – the global leader in safety brakes and motion control technologies.

1. Overexcitation & Power Reduction Operating Principle:
The ROBA-switch functions via an advanced two-stage voltage control mechanism:
- Initial Overexcitation Stage: Upon startup, the rectifier applies an initial overexcitation phase for a precise duration of 0.45 seconds (Overexcitation time) by delivering a high DC output voltage. This rapidly energizes the electromagnetic brake coil to produce maximum magnetic pull, dramatically reducing brake releasing time and enabling instantaneous mechanical acceleration without torque lag.
- Power Reduction / Holding Stage: After the 0.45-second overexcitation period, the rectifier automatically switches to a power reduction (holding) mode. The output voltage decreases to a level sufficient to keep the brake disengaged. This reduces thermal dissipation in the coil by up to several tens of percent, preventing overheating, extending insulation life, and significantly lowering energy consumption.

2. Robust Industrial Enclosure & High Reliability:
- Superior Protection Rating: Engineered with an IP65 ingress protection rating for the main body, shielding internal electronics against dust and water jets in harsh industrial environments. Connection terminals feature IP20 protection for safe installation and maintenance.
- Wide Operating Voltage Range: Accepts a flexible AC input range from 100 to 250 V AC, yielding a proportional DC output voltage from 45 to 113 V DC for universal compatibility across global electrical grids.
- Thermal Loading Capability: Supports maximum continuous load currents of 2.0 A at ambient temperatures <= 45°C, and 1.0 A at maximum ambient temperatures up to 70°C inside control cabinets.
- International Compliance: Fully certified with UL and CE marks, verifying compliance with international industrial safety and electromagnetic compatibility standards.

3. Key Industrial Applications:
Ideal for controlling Mayr ROBA-stop safety brakes, spring-applied holding brakes on servo motors, hoist vertical axes, automated packaging machinery, material handling systems, and robotics.

• Manufacturer: Mayr (Mayr Power Transmission)
• Product Series: ROBA-switch Fast Acting Rectifier
• Frame Size: Size 10
• Overexcitation Time: 0.45 seconds (0.45 s)
• Input Voltage Range: 100 – 250 V AC
• Output Voltage Range: 45 – 113 V DC
• Operational Mode: Operation with overexcitation or power reduction
• Maximum Current Loading: 
  - 2.0 Amp at ambient temperature <= 45°C
  - 1.0 Amp at maximum ambient temperature 70°C
• Protection Rating: Body IP65, Terminals IP20
• Certifications & Standards: UL listed, CE marked
• Country of Origin: Germany