ITA25B3

Series:	ITA, TRANSIL™
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Type:	Zener
Bidirectional Channels:	9
Voltage - Reverse Standoff (Typ):	24V
Voltage - Breakdown (Min):	25V
Voltage - Clamping (Max) @ Ipp:	36V
Current - Peak Pulse (10/1000µs):	25A (8/20µs)
Power - Peak Pulse:	300W
Power Line Protection:	No
Applications:	General Purpose
Capacitance @ Frequency:	420pF @ 1MHz
Operating Temperature:	--
Mounting Type:	Surface Mount
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	20-SOIC
Base Part Number:	ITA25B

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Introduction:

IRA25B3 is a highly reliable, fast recovery, low leakage bidirectional Thyristor Varistor (TVS) diode. This diode is made up of a pair of anode and cathode pins and is designed to protect computer circuits, communications systems, telecom systems, control interface circuits, automotive load switches, and other types of electronics against transient voltage surge and ESD pulses. This diode has a wide operating temperature range and high surge capability, making it suitable for a variety of applications in the industrial and consumer electronics environment.

Applications:

IRA25B3 is mainly used in computer circuits, communications systems, telecom systems, control interface circuits, automotive load switches, and other types of electronics. It is capable of protecting delicate electronic circuits from voltage surges, over-voltages, ESD pulses, and other transient events that might occur in power supply systems. This diode can also be used in circuit protection applications, such as protecting headphone jacks from ESD shocks. This diode is also suitable for automotive applications such as load switches, spark gap suppression, and ignition protection. Additionally, it can be used in medical devices, military equipment, and aerospace systems that are exposed to ESD or voltage spikes.

Working Principle:

The working principle of an IRA25B3 diode is based on the fact that its bidirectional design is capable of conducting current in both directions. This allows the diode to withstand reverse polarity and transients up to several hundreds of volts. The diode works by actively conducting the transient, clamped by internal current limiting and thermal breakdown processes, which help to protect sensitive systems from destruction due to voltage surges or other transient events. The positive temperature coefficient of this diode ensures that its thermal resistance increases with increasing temperature. This helps to dissipate excess heat energy, thus providing the necessary protection against overloads and other thermal dangers.

Conclusion:

IRA25B3 is a bidirectional Thyristor Varistor (TVS) diode that is highly reliable and offers fast recovery and low leakage. It is suitable for a variety of electronic protection applications in the industrial and consumer electronics environment. The diode works on the principle of active diode conduction and clamping by internal current limiting and thermal breakdown processes, which are capable of protecting sensitive systems from destruction due to voltage surges or other transient events. Furthermore, its positive temperature coefficient helps to dissipate excess heat energy, thus providing the necessary protection against overloads and other thermal dangers.

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