SMF58A-HM3-18 Circuit Protection

Package / Case:	DO-219AB
Supplier Device Package:	SMF (DO-219AB)
Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Zener
Unidirectional Channels:	1
Voltage - Reverse Standoff (Typ):	58V
Voltage - Breakdown (Min):	64.4V
Voltage - Clamping (Max) @ Ipp:	95V
Current - Peak Pulse (10/1000µs):	2.1A
Power - Peak Pulse:	200W
Power Line Protection:	No
Applications:	Automotive
Capacitance @ Frequency:	144pF @ 1MHz
Operating Temperature:	-65°C ~ 175°C (TJ)
Mounting Type:	Surface Mount

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TVS - Diodes

Transient voltage suppressors (TVS) diodes are a kind of protection component that absorbs excessive electric charge and directs it to a ground. SMF58A-HM3-18 is one such TVS diode that protects electronic devices against voltage transient such as spikes, surges, over-voltage and inductive switching.

Features of SMF58A-HM3-18

SMF58A-HM3-18 is a low surge suppressor diode and is designed mainly for applications such as communication systems, data broadcast systems, data recording systems and automotive systems. This diode has a low working voltage and is suitable for use in a wide range of temperature. It features a low clamping voltage, good surge capability, fast response time, low leakage and high reliability. This diode has a wide breakdown voltage range (6V to 370V) and a reverse breakdown voltage range of 5V to 500V.

Applications

The SMF58A-HM3-18 TVS diode is suitable for various applications such as data transmission systems, data recording systems, automotive systems, ports protection and surge protection for communication system components. Additionally, it can be used for protection in low-voltage communication systems where low clamping voltage, low leakage currents and fast response times are required. It is also suitable for automotive systems, where the working voltage needs to be kept at a low level and the diode’s reverse breakdown voltage range must meet the low switching voltage requirements of automotive systems.

Working Principle

The purpose of this diode is to protect sensitive components from over-voltage or inductive switching. When the input signal is higher than a certain threshold, the diode acts as a current limiter. The threshold voltage is defined by the clamping voltage of the diode. When the voltage across the diode surpasses a certain threshold, the diode immediately becomes conductive, which provides a short circuit across the circuit. This is commonly known as the "avalanche effect". However, due to the "avalanche effect", the diode will dissipate power because of the drop in voltage across the diode when it is conducting.In summary, SMF58A-HM3-18 is a low surge suppressor diode and is designed mainly for applications such as communication systems, data broadcast systems, data recording systems and automotive systems. This diode features a low clamping voltage, low leakage currents, good surge capability, fast response time, high reliability and wide breakdown voltage range. It can be used in various applications such as data transmission systems, surge protection and automotive systems. The working principle of this diode is to protect sensitive components from over-voltage or inductive switching, by providing an immediate current limit when the voltage surpasses a certain threshold.

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