RL0402E012M300K 0402 PTC Resettable Fuse | 12V 3A Overcurrent Protection | RUILON

The RL0402E012M300K is a compact and reliable 0402 PTC resettable fuse designed for effective overcurrent and short-circuit protection in modern electronic circuits. With a 12V operating voltage and 3A hold current, it provides fast response to fault conditions and automatically resets once the fault is removed, ensuring continuous circuit protection. Its small 0402 footprint makes it ideal for high-density PCB layouts while maintaining ease of assembly. Engineered for low resistance, stable electrical characteristics, and long operational life, this device is widely used in consumer electronics, IoT modules, and portable applications requiring efficient and reusable protection.

Key Features

• Compact 0402 package for high-density PCB designs
• Resettable PTC fuse for overcurrent and short-circuit protection
• 12V 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 electronics
• Consumer electronics and smart devices
• PCB-level protection in high-density designs