재설정 가능한 칩 퓨즈는 무엇입니까??

A resettable chip fuse, also known as a PTC (양의 온도 계수) resettable fuse, is a type of surface mount device (SMD) that protects electronic circuits from overcurrent and overheating. It acts like a traditional fuse but can automatically reset itself after a fault is cleared. When a fault like an overcurrent or short circuit occurs, the fuse’s resistance increases, limiting the current flow. Once the fault is removed and the fuse cools down, its resistance returns to normal, 전류가 다시 흐르도록 허용합니다.

PPTC chip self recovery fuse 1210 2A 2.5A 3A 6V 30V 33V 60V SMD

Resettable SMD Fuse 1206 SMD Chip 6V 0.35A (e0113 4c5f1 48d2a d4c5b 1f85e d0afa

SMD 퓨즈 재설정 1812 16COM 커뮤니케이션 과전류 보호를위한 V 2A 표면 마운트 칩

재 정착 가능한 칩 퓨즈 (PPTC) 중합체의 양의 온도 계수 특성에 기초한 과전류 보호 요소입니다.. 자동 재설정 기능이 있으며 전자 장비의 회로 보호에 널리 사용됩니다.. 다음은 핵심 사항입니다:

1. 구조 및 작동 원리
‌재료 구성‌
It is composed of a specially treated polymer resin (such as PE polymer) 전도성 입자 (카본 블랙 또는 금속 입자). 정상적인 조건에서, 전도성 입자는 낮은 저항 경로를 형성합니다. (0.1-몇 옴)‌.
‌Protection Mechanism‌
과전류가 발생한 경우, 전류의 열 효과로 인해 수지가 녹아 팽창하게 됩니다., the conductive network breaks, and the resistance suddenly increases to a high resistance state (up to the megohm level), limiting the current to the microampere level‌.
After the fault is resolved, 전도성 입자가 냉각되고 수축됩니다., 다시 연결하다, and return to a low resistance state, without the need for manual replacement‌.
PTC Behavior:
Resettable fuses utilize a Polymeric Positive Temperature Coefficient (PPTC) 재료. This material exhibits a significant increase in resistance as temperature rises.

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LF 1812 Resettable Fuse PPTC 1812L SMD Self-Recovery 0.2A 0.5A 500mA 0.75A 1.1A 1.5A 2A 2.6A 3A 6V 8V 13.2V 15V 24V 30V

Overcurrent Protection Surface Mount PPTC Resettable Fuse 6V 30V 33V 60V SMD

과전류 보호:
When a current exceeds the fuse’s rated value flows, the PPTC material heats up, causing its resistance to increase. This increase in resistance reduces the current flow, preventing damage to the circuit.

자동 재설정:
Once the fault is removed and the fuse cools down, the resistance decreases, allowing normal current flow to resume.

Key Features and Benefits:
자체 설정:
The ability to automatically reset after a fault event makes it a reusable alternative to traditional fuses.

과전류 보호:
Protects circuits from damage caused by excessive current, short circuits, or overheating.

Space-Saving:
SMD packaging allows for integration into compact electronic devices.
Wide Range of Applications:
Found in various devices, including computers, 휴대폰, 의료 장비, and automotive electronics.

예:
Imagine a situation where a USB port on a laptop is accidentally short-circuited. A resettable fuse on the USB power line would detect the overcurrent and increase its resistance, limiting the current and preventing damage to the laptop’s power supply and other components. Once the short is removed, the fuse would reset, and the USB port would be ready to use again.