RL0402E018M500K 0402 PTC Resettable Fuse | 18V 5A Overcurrent Protection | RUILON

The RL0402E018M500K is a high-performance 0402 PTC resettable fuse designed for reliable overcurrent and short-circuit protection in compact electronic circuits. With an 18V operating voltage and 5A hold current, it delivers fast response to fault conditions and automatically resets once normal operation resumes. Its ultra-small 0402 footprint is ideal for high-density PCB layouts, offering an excellent balance between miniaturization and electrical performance. Engineered for low resistance, stable operation, and long service life, this device is widely used in consumer electronics, IoT modules, and portable systems requiring efficient and reusable circuit protection.

Key Features

• Compact 0402 package for high-density PCB designs
• Resettable PTC fuse for overcurrent and short-circuit protection
• 18V operating voltage with 5A hold current
• Fast trip response with automatic reset functionality
• Low resistance for minimal power loss
• Stable performance across multiple reset cycles
• High reliability and long operational life
• RoHS compliant and SMT-compatible

Applications

• Overcurrent protection in compact electronic devices
• Smartphones, tablets, and wearable electronics
• Battery packs and charging circuits
• Low-voltage power lines and signal circuits
• IoT modules and embedded systems
• Consumer electronics and smart devices
• PCB-level protection in high-density designs