Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Voltage - Breakover:	250V
Voltage - Off State:	190V
Voltage - On State:	3V
Current - Peak Pulse (8/20µs):	300A
Current - Peak Pulse (10/1000µs):	100A
Current - Hold (Ih):	150mA
Number of Elements:	1
Capacitance:	62pF
Mounting Type:	Through Hole
Package / Case:	TO-226-2, TO-92-2 (TO-226AC) (Formed Leads)

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Introduction

Thyristors are electro-sensitive semiconductor switches that offer many advantages, including low forward voltage drop, high reliability, and high current carrying capacity. They are typically used as AC switches, in which they are triggered either on or off, depending on the current polarity. Thyristors are also used in circuit protection, as they can help control current spikes and protect devices from transient over-voltage. The TISP4250H3LMFR is a surface-mount thyristor specifically designed for AC line-level protection.

Applications

The TISP4250H3LMFR is a high-temperature overvoltage protector and can be used in various AC applications, including lighting, air conditioning, heating, and other industrial and commercial equipment. It offers fast response, low-leakage current, and accurate control over AC line-level protection up to 250V AC. It is suitable for use in areas where AC line surge protection is important. It protects circuits and equipment from transient over-voltage, such as electrical surges, spikes, and lightning strikes. It is also capable of withstanding high inrush current and voltage transients. The TISP4250H3LMFR is designed to prevent over-voltage from reaching critical components, and can be used in a variety of applications to protect the device or circuit under varying conditions.

Features

The TISP4250H3LMFR features an ultra-fast response time of 2.1uS, a high peak pulse current of 150A, a high peak pulse power of 7.5kW, an operating temperature range of -40°C to 150°C, and an MTBF of 10000 hours. It is also UL rated for 8kV ESD protection.In addition, the device has excellent protection against a wide range of over-voltage conditions, including electrostatic discharges, surges, and lightning strikes. It offers low-leakage current, which helps protect sensitive circuits from being damaged by a sustained high current. It also features a thermal shutdown design, which prevents damage from overheating.

Working Principle

The TISP4250H3LMFR is a four-terminal surface-mount thyristor that works based on the thyristor principle. In simple terms, when a positive current is applied to the anode terminal, the current at the anode soon reaches the positive peak voltage. This causes a positive turn-on voltage to be applied to the gate terminal, which triggers the thyristor to open. Once opened, the thyristor remains in an open state until the current at the anode reaches the negative peak voltage, at which point it acts to close the gate. By controlling the peak voltage and the current polarity, the thyristor can be used to control and regulate current over a wide range of AC applications.

Conclusion

The TISP4250H3LMFR is a four-terminal surface-mount thyristor specifically designed for AC line-level protection. It offers fast response time, high current carrying capacity, and excellent surge protection. It is suitable for use in various AC applications, such as lighting, air conditioning, heating, and other industrial and commercial equipment. It is designed to protect against transient over-voltage, such as electrical surges, spikes, and lightning strikes, making it ideal for a variety of applications where surge protection is essential.

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