This protection module combines a SMBJ5.0A Transient Voltage Suppression (TVS) diode with a resettable PTC fuse to provide robust protection against voltage spikes, surges, overcurrent, and electrostatic discharge. It is designed to safeguard sensitive electronic circuits from transient overvoltage events commonly caused by inductive loads, power supply fluctuations, or external interference.
Key Features
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Integrated surge and overcurrent protection in a compact module
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Fast-response TVS diode for transient voltage clamping
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Resettable PTC fuse automatically recovers after fault removal
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Suitable for DC power lines and signal protection
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Helps prevent damage to microcontrollers and peripheral circuits
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Improves system reliability and long-term durability
Technical Specifications
TVS Diode (SMBJ5.0A):
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Type: Unidirectional TVS diode
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Stand-off voltage (Vwm): 5.0V
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Breakdown voltage (Vbr): approx. 6.4V – 7.0V
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Peak pulse power dissipation: 600W (10/1000 µs waveform)
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Fast response time for transient suppression
Resettable Fuse (PTC):
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Type: Polymer PTC resettable fuse
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Operating voltage: typically up to 30V
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Overcurrent protection with automatic reset after cooling
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Low resistance during normal operation
Electrical Characteristics
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Designed for low-voltage DC systems (5V logic and power rails)
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Provides protection against ESD, lightning-induced surges, and load switching transients
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Reduces risk of permanent damage caused by short circuits or current spikes
Compatibility and Integration
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Suitable for Arduino, ESP32, ESP8266, Raspberry Pi, and other embedded systems
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Can be placed at power input or sensitive signal lines
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Simple two-line inline installation
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