RL0201E005M121K 0201 PTC Resettable Fuse | 5V 120mA Overcurrent Protection | RUILON

The RL0201E005M121K is a compact 0201 PTC resettable fuse designed for reliable overcurrent and short-circuit protection in ultra-miniature electronic circuits. With a 5V operating voltage and 120mA hold current, it delivers fast fault response and automatic reset after fault removal, ensuring continuous circuit protection. Its ultra-small footprint makes it ideal for high-density PCB designs where space optimization is critical. Built for low resistance, stable electrical performance, and long service life, this device is widely used in consumer electronics, IoT modules, and portable applications requiring efficient and reusable protection.

Key Features

• Ultra-miniature 0201 package for space-constrained PCB layouts
• Resettable PTC fuse for overcurrent and short-circuit protection
• 5V operating voltage with 120mA hold current
• Fast trip response with automatic reset functionality
• Low resistance for minimal power loss
• Stable and repeatable performance across multiple fault 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 circuit protection in high-density designs