E4809-032-470-B by Okuma

The Okuma E4809-032-470-B resistor is a precision passive component in the E4809 CNC Boards series, engineered for dependable performance in industrial automation control systems. It delivers a nominal 470 Ohm resistance with a power dissipation capability of 0.25W to regulate current flow and protect downstream electronics in CNC control circuits. Packaged in a compact 6.3mm x 2.3mm ceramic body, this through-hole device combines mechanical robustness with thermal stability to withstand rigorous manufacturing environments. The resistor’s composition and design ensure consistent electrical characteristics under continuous operation, making it an essential part of Okuma’s control board assemblies. Manufactured by Okuma, the E4809-032-470-B integrates seamlessly into OPUS 5000 systems for reliable signal conditioning and voltage division functions.

Detailed technical specifications define the E4809-032-470-B’s performance envelope with precision. The device’s Tolerance of ±10% ensures predictable resistance variation, while its Temperature Coefficient of ±200ppm/°C maintains stability across thermal cycles. It operates safely at a Maximum Working Voltage of 250V and tolerates transient stress up to Maximum Overload Voltage of 500V. The Power Rating of 0.25W (1/4W) aligns with low-power current limiting tasks on printed circuit boards. Constructed with a ceramic body and fitted with tin-plated copper leads, the resistor exhibits high insulation resistance and corrosion-resistant terminations. Lead geometry is defined by a Lead Diameter of 0.6mm, optimized for reliable solder joints and mechanical retention in Through Hole Mounting applications.

Operational features emphasize durability and environmental resilience in demanding CNC settings. The E4809-032-470-B performs reliably over a broad Operating Temperature Range of –55°C to +155°C, ensuring stable resistance under extreme thermal conditions. Its ceramic substrate provides excellent thermal conductivity and electrical insulation, reducing hotspot formation during peak loads. Compliance with RoHS regulations confirms the absence of hazardous substances, supporting environmentally responsible manufacturing practices. With a compact form factor and a weight of 0.85 lbs (approximately 0.39 kg) per packaged unit, the resistor imposes minimal space and mass constraints, facilitating high-density board layouts.

System integration is streamlined for Okuma’s OPUS 5000 ECP Card 2 platform and other industrial control boards. The E4809-032-470-B’s standardized footprint and pin configuration allow drop-in replacement and automated soldering on conveyorized assembly lines. Target applications include CNC machine tool controllers, servo drive feedback circuits, and logic-level interface modules where precise current limiting and voltage division are critical. By combining robust materials, well-defined electrical properties, and compliance with industry standards, this resistor supports continuous operation and maintenance of high-precision automation systems.