RL0402E005M300K 0402 PTC Resettable Fuse | 5V 3A Overcurrent Protection | RUILON

The RL0402E005M300K is a compact 0402 PTC resettable fuse designed to provide reliable overcurrent and short-circuit protection in modern electronic circuits. With a 5V operating voltage and 3A hold current, it delivers rapid response to fault conditions and automatically resets once normal operation resumes. Its small 0402 footprint makes it ideal for high-density PCB layouts while maintaining ease of handling during assembly. Engineered for low resistance, stable electrical characteristics, 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 space-efficient PCB layouts
• Resettable PTC fuse for overcurrent and short-circuit protection
• 5V operating voltage with 3A hold current
• Fast trip response with automatic reset capability
• 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
• USB power lines and low-voltage systems
• IoT modules and embedded electronics
• Consumer electronics and smart devices
• PCB-level protection in high-density designs