- The WMF21 series thermistors are essential for controlling inrush current in power supply loops across various applications, including power supplies, ballasts, CFLs, and heating systems in CRTs, color TVs, monitors, and heaters. - Designed with radial lead resin coating, these thermistors combine a compact size with high performance, ensuring effective inrush current limitation while maintaining reliability and longevity. - Key benefits include: - Fast response time to protect circuits from sudden surges. - Low mass for easy integration into different systems. - Enhanced material consistency (B) for improved temperature management and reduced residual resistance. - Superior heat capacity for effective inrush current limitation, directly influenced by the thermal time constant (T) and thermal loss constant (d). - Specific applications include: - Power supply circuits in consumer electronics, preventing damage from initial power surges. - Ballasts for CFL lighting systems, ensuring stable operation and extended bulb life. - Heating elements in CRTs, maintaining optimal performance while safeguarding components from thermal stress. - With high reliability and a long service life, the WMF21 series thermistors are the ideal choice for engineers and manufacturers seeking dependable solutions for current management in electrical systems.