Product Description:

The 03.P1.300-004U is an electromagnetic brake element produced by KEB for the P1 Encoders and Brakes series. Installed between a motor and the driven load, this unit creates frictional torque when its coil is de-energized, allowing machinery in automated cells to stop quickly and hold position without mechanical backlash. Its compact design lets machine builders integrate controlled stopping and static holding functions directly on servo or induction motor shafts.

The brake generates a characteristic holding moment of 2.7 Nm at 20 °C, while its static torque capability falls to 1.8 Nm when the coil reaches 120 °C, safeguarding operation at elevated winding temperatures. The coil consumes 11 W under nominal conditions and is rated for a continuous 100% duty cycle, so the brake may remain energized without thermal cycling. Rotors can run at up to 10000 rpm without exceeding the permissible operating surface speed. Electrical engagement on direct current completes within the specified connection time of 15 ms, and release on DC is limited to a 3 ms response delay; when driven from an AC source, pickup delay must remain below 12 ms. After power removal, mechanical separation of the friction surfaces concludes in no more than 40 ms.

An enclosure rating of IP40 limits the brake to protected indoor locations that are free from conductive dust and direct moisture. Installation on circuits that fall under Overvoltage Category III requires appropriate surge protection for switching devices. Correct air-gap management is critical: the gap may be closed to 0.15 mm during commissioning, must not exceed 0.40 mm at 20 °C, and is restricted to 0.35 mm when the system stabilizes at 120 °C. During dynamic stopping, the application should respect the maximum braking speed of 6000 rpm to prevent excess heat and accelerated wear.