IRKU91/12A

Current - On State (It (RMS)) (Max):	150A
Base Part Number:	KU91
Package / Case:	ADD-A-PAK (3 + 4)
Mounting Type:	Chassis Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Current - Hold (Ih) (Max):	200mA
Current - Non Rep. Surge 50, 60Hz (Itsm):	1785A, 1870A
Current - Gate Trigger (Igt) (Max):	150mA
Voltage - Gate Trigger (Vgt) (Max):	2.5V
Series:	--
Current - On State (It (AV)) (Max):	95A
Voltage - Off State:	1.2kV
Number of SCRs, Diodes:	2 SCRs
Structure:	Common Anode - All SCRs
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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IRKU91/12A Application Field and Working Principle

Thyristors, SCRs, and module products are widely used in power electronics devices and systems, from small-signal components to high-power systems. They have unique characteristics that make them suitable for various power applications. The IRKU91/12A is a type of thyristor module developed by Infineon Technologies and specially designed for various industrial and consumer power requirements. This article will discuss the working principle, application fields, and installation methods of the IRKU91/12A.

Working Principle

The IRKU91/12A is a three-phase thyristor module. It is constructed from six thyristors arranged in series. Each thyristor is connected to a separate pair of terminals, and all three pairs of terminals are connected in a three-phase electrical circuit. In this circuit, a pair of thyristors are connected in series, with the controlling gates and their connections side-by-side for synchronized operation. In power electronics, a thyristor is a semiconductor device that switches on or off as a result of a current or voltage applied across its terminals. The IRKU91/12A uses a so-called Fast-acting Thyristor (FAT) to ensure fast and reliable switching.

Application Field

The IRKU91/12A is typically used in power electronics systems, where it is used to control and regulate the power supply to a load. Examples of such applications include variable speed drive systems, motor control systems, variable frequency drives, and power rectifiers. The IRKU91/12A is also suitable for many AC/DC and DC/DC power conversion applications, such as uninterruptible power supply (UPS) systems, phase angle control, and voltage regulation.

Installation

The IRKU91/12A module can be mounted on a suitable DIN rail or on a plate or panel. The device is rated for temperatures from -40 to +105°C and has a mechanical strength of 2.2kV. It requires a solid mounting to ensure reliable and safe operation. Adequate cooling should be provided to avoid overheating. The IRKU91/12A is delivered with a built-in protection measure that prevents the module from being damaged by short-circuits.

Conclusion

The IRKU91/12A is a thyristor module developed by Infineon Technologies specifically designed for various industrial and consumer power requirements. It is constructed from six thyristors arranged in series, and can be used in power electronics systems to control and regulate the power supply to a load. The device is rated for temperatures from -40 to +105°C and has a mechanical strength of 2.2kV. Adequate cooling should be provided to avoid overheating, and the module should be securely mounted to avoid damage.

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