BTA20.3

The Bosch Rexroth Indramat BTA20.3 module is a robust three-phase bridge rectifier in the BTA20 Machine Control Boards series designed for reliable industrial power conversion. Housed in a module/chassis mount configuration, it delivers an average forward output current (if(av)) of 20 A while maintaining a compact 94 mm x 34 mm x 30 mm footprint and weighing approx. 120 g for easy panel integration. Engineered for harsh environments, it supports an operating temperature range of -40°C to +150°C and resists voltage surges up to an 800 V maximum repetitive peak reverse voltage (VRRM). The unit features screw-type terminals and a standard polarity layout, simplifying installation and ensuring consistent orientation across assemblies. With high insulation resilience and precision fabrication, the BTA20.3 module meets stringent industrial automation requirements.

Electrical characteristics are defined by a maximum forward voltage drop (VFM) of 1.15 V per diode and a peak surge current (IFSM) of 220 A, accommodating startup inrush and transient loads without compromise. The insulation withstand capability is rated at 2500 V RMS, providing robust isolation between power paths. Leakage is controlled to 10 μA max, minimizing stray currents in sensitive control circuits. Housed in a module/case package designed for chassis mounting, the rectifier maintains stable thermal performance under continuous load. Its factory-assigned configuration and communication bus protocols ensure compatibility with existing BTA20 assemblies.

Operational performance is highlighted by its capacity to sustain 20 A continuous current even during demanding production cycles, while the 1.15 V drop per diode reduces heat generation and improves overall system efficiency. The rectifier's -40°C to +150°C environment rating enables deployment in both cold-store and high-temperature cabinet applications without degradation. Standard screw terminals provide reliable mechanical retention and facilitate quick maintenance or module replacement. Combined with its 2500 V RMS insulation and low leakage characteristic, the BTA20.3 ensures long-term stability and minimal downtimes in rectifier stacks or motor drive systems.

System integration is streamlined by adherence to Bosch Rexroth Indramat's board-level design standards and the BTA20 series architecture, promoting interchangeability and reduced inventory complexity. Target applications include industrial automation control panels, motor drive assemblies, power conversion racks, and process control equipment where consistent DC bus voltage and resilience to voltage spikes are critical. The module's compact form factor and robust electrical spec sheet make it ideal for tight-enclosure installations and high-density power modules. With its combination of precise electrical parameters and rugged construction, the BTA20.3 is an essential component for modern industrial control and drive solutions.