1.5SMC91A-E3/9AT

Voltage - Clamping (Max) @ Ipp:	125V
Supplier Device Package:	DO-214AB (SMCJ)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Current - Peak Pulse (10/1000µs):	12A
Series:	1.5SMC, TransZorb®
Voltage - Breakdown (Min):	86.5V
Voltage - Reverse Standoff (Typ):	77.8V
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, also known as Transient Voltage Suppressor diodes, are semiconductor devices designed to protect electronics from electrical transients. In this article, we will discuss the application field and working principle of 1.5SMC91A-E3/9AT.The 1.5SMC91A-E3/9AT is a small and lightweight unidirectional TVS diode that can protect a wide variety of electronics from transient voltage. The diode is ideal for protecting data lines from high-speed signal transients, such as that produced by Electrostatic Discharge (ESD) or lightning. The device is also suitable for suppressing transients in power supply lines.The 1.5SMC91A-E3/9AT device has a maximum stand-off voltage of 11.6V and peak surge capability of 9A. It has a low capacitance of 6.1pF, and a highly reliable multilayer construction. The package has a four-layer design, with three integrated metal layers and one dielectric layer. This construction ensures excellent ESD immunity and low capacitance.In terms of application, the 1.5SMC91A-E3/9AT is suitable for protecting sensitive circuits by clamping voltage transients within a safe operating range. The device can be used in a variety of applications, including portable devices, laptops, digital cameras, and automotive electronics. The device is also suitable for protecting microprocessors, data lines, and communication lines.Now, let’s take a look at the working principle of the 1.5SMC91A-E3/9AT TVS diode. As the name suggests, the device is designed to protect electronics from transient voltage. When a sudden surge of voltage appears on the input line, the TVS diode will conduct, and limit the output voltage to a safe level.When the input voltage is below the breakdown voltage of the device, the diode behaves like a high resistance, and the current flow is negligible. As the input voltage reaches the breakdown voltage, the diode conducts, and current starts to flow. When the voltage exceeds the specified breakdown voltage, the diode conducts more current, and functions as a current limiter.Finally, when the voltage exceeds the clamping voltage of the device, the diode’s peak current starts to reduce, and the device eventually turns off. The device then returns to its high resistance state, and the cycle repeats.In summary, the 1.5SMC91A-E3/9AT is a small and lightweight unidirectional TVS diode that can protect a wide variety of electronics from transient voltage. The device has a maximum stand-off voltage of 11.6V and peak surge capability of 9A. The device is suitable for protecting sensitive circuits by clamping voltage transients within a safe operating range, and can be used in a variety of applications, including portable devices, laptops, digital cameras, and automotive electronics. In terms of working principle, the device conducts current when the input voltage reaches the breakdown voltage, and functions as a current limiter when the voltage exceeds the specified breakdown voltage. Finally, when the voltage exceeds the clamping voltage of the device, the diode’s peak current starts to reduce, and the device eventually turns off.

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