SA40A Circuit Protection

Voltage - Clamping (Max) @ Ipp:	64.5V
Supplier Device Package:	DO-204AC (DO-15)
Package / Case:	DO-204AC, DO-15, Axial
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	500W
Current - Peak Pulse (10/1000µs):	7.9A
Series:	SA
Voltage - Breakdown (Min):	44.4V
Voltage - Reverse Standoff (Typ):	40V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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TVS-Diodes are protective semiconductor devices used to protect various electronic systems from voltage surges or spikes. The SA40A is a type of TVS diode commonly used in Circuit Protection applications. It is a surface mount low capacitance transient voltage suppressor diode designed to protect low speed data lines from ESD and other voltage-induced transient events. In this article, we’ll be discussing the application and working principle of the SA40A, and how it benefits system protection.

The SA40A is a type of low-capacitance, unidirectional transient voltage suppressor diode for use in low-speed data applications. The device features a low reverse leakages current (I_R) of 10μA@6V and a low capacitance of 5pF@5V. With a maximum operating voltage of 5.5V, it is ideal for use with low speed serial data lines such as UART, SPI, I2C, and other similar applications.

The device is typically used in system protection applications to protect a system against destructive transient voltage events. When an over-voltage transient event is encountered, the SA40A’s break-down voltage momentarily changes, allowing it to absorb the excessive energy, reducing it to a safe level. This is known as Clamping, and is often considered to be the most effective form of transient voltage suppression.

In addition, the SA40A also offers a variety of additional benefits. It features a compact package, with small, lightweight design, making it a perfect choice for space-limited applications. Additionally, it also offers excellent surge tolerances of up to 80 peak A, covering most ESD applications, and provides excellent Contact Discharge immunity, with a maximum surge voltage of ±8kV.

The device is extremely easy to install and has a very low insertion loss of V_Clamp = 0.01V or less. Due to its wide operating temperature range, the SA40A is suitable for both indoor and outdoor environments. It is highly reliable and cost-effective, making it an ideal choice for circuit protection applications.

In conclusion, the SA40A Transient Voltage Solution Diode offers users a range of features and benefits suitable for protection against transient voltage events. Its low insertion loss, wide operating temperature range, and surge tolerance make it an ideal choice for circuit protection applications. The device is low-cost, easy to install, and very reliable, making it an excellent choice for any circuit protection application.

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