RL0402E018M300K 0402 PTC Resettable Fuse | 18V 3A Overcurrent Protection | RUILON

The RL0402E018M300K is a compact 0402 PTC resettable fuse designed to provide reliable overcurrent and short-circuit protection in modern electronic circuits. With an 18V operating voltage and 3A hold current, it ensures fast response to fault conditions and automatically resets once normal operation is restored. Its small 0402 footprint is ideal for high-density PCB layouts, offering an effective balance between miniaturization and assembly efficiency. Engineered for low resistance, stable electrical performance, and long operational 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 3A 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 service 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