SEW EURODRIVE BME 1.5 Brake Rectifier

Description

The SEW EURODRIVE BME 1.5, part number 8257221, is an essential component for controlling SEW motor brakes. This compact module functions as a half-wave rectifier, converting AC input voltage to a DC output for reliable brake operation. Its robust design and wide voltage range make it a versatile choice for various industrial automation and drive technology applications. The unit is designed for easy DIN-rail mounting.

Specifications

• Manufacturer: SEW EURODRIVE
• Model: BME 1.5
• Part Number: 8257221
• Input Voltage (UE): 150...500V AC
• Output Current (IN): 1.5A DC
• Mounting: DIN-Rail

Label Info

• SEW EURODRIVE
• Type: BME 1.5
• Part Nr: 8257221
• 48/49/50.01

Application

This brake rectifier is commonly used in drive systems for conveyors, hoists, and general machinery where controlled motor braking is required for safety and operational precision.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned component, you are contributing to a circular economy and helping to avoid 4.0 kg of CO2 emissions associated with the production of a new unit. This is comparable to the emissions from a 20-kilometer car journey.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

What is the difference between a half-wave (like BME 1.5) and a full-wave bridge rectifier for a motor brake?

A half-wave rectifier like the BME 1.5 provides a DC voltage that is approximately 0.45 times the AC input voltage. A full-wave bridge rectifier (like SEW's BG series) provides about 0.9 times the AC input voltage. This results in faster brake release times for bridge rectifiers but also higher power consumption and heat generation in the brake coil. The choice depends on the application's requirements for switching speed and duty cycle.

The BME 1.5 is a standard rectifier. For applications requiring rapid brake engagement (overexcitation), you would need a rectifier with built-in overexcitation electronics, such as the SEW BSG or BUR series. These units apply a higher initial voltage to release the brake quickly and then reduce it to a lower holding voltage.

The terminals are clearly marked. Terminals 1 and 2 are for the AC input voltage (150-500V AC). Terminals 3 and 4 are the DC output to the brake coil. It is crucial to connect the brake to the DC terminals and the supply voltage to the AC terminals to avoid damaging the rectifier or the brake.

Last Update: Friday, March 13, 2026

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