RL0201E009M121K 0201 PTC Resettable Fuse | 9V 120mA Overcurrent Protection | RUILON

The RL0201E009M121K is a high-reliability 0201 PTC resettable fuse designed for effective overcurrent and short-circuit protection in compact electronic circuits. With a 9V operating voltage and 120mA hold current, it delivers fast response to fault conditions and automatically resets once normal operation is restored. Its ultra-miniature 0201 footprint makes it ideal for space-constrained, high-density PCB layouts. Engineered for low resistance, stable electrical performance, and long operational life, this device is well-suited for consumer electronics, IoT modules, and portable systems requiring dependable and reusable circuit protection.

Key Features

• Ultra-small 0201 package for high-density PCB designs
• Resettable PTC fuse for overcurrent and short-circuit protection
• 9V operating voltage with 120mA hold current
• Fast trip response with automatic reset functionality
• Low resistance for reduced 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 pack and charging circuit protection
• Low-voltage power lines and signal circuits
• IoT modules and embedded systems
• Consumer electronics and smart devices
• PCB-level protection in space-constrained designs