K1300S1URP Discrete Semiconductor Products

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K1300S1URP, part of the general thyristor family, is a bidirectional triode thyristor (TruT). It is a three-terminal semiconductor device with four layers of alternating N and P-type regions, forming a sandwich-like structure. K1300S1URP is essentially an SCR split in half, operated like two back-to-back, oppositely poled SCRs.

The TruT has two main applications:

• High-current pulse applications, such as pulse-transmission.
• Replacing mechanical relays – switching applications where high-speed response and high accuracy is required.

The working principle of the K1300S1URP is based on the fact that, unlike other thyristors, resistance between its two main terminals cannot switch the device on and off. Instead, its turn-on and turn-off happens when an external control current (gate current) is applied to its gate terminal. If a negative potential is applied to the anode with respect to cathode, the junction capacitance of the two is discharged and the forward current turns on. On the other hand, if a positive voltage is applied to the gate with respect to cathode, the junction capacitance of the two is charged and the reverse current turns off. The positive gate current should be sufficient to keep the device off for the duration of the power cycle and, if necessary, be boosted to turn on the device.

K1300S1URP is especially well-suited for heavy-duty, high-current applications because it has:

• High-currentrating – 175A.
• High-voltagerating – 1600V.
• High-on-statevoltage – typically 2V.
• High-visible-angleoperation – up to 180°.
• Fast turn-on and turn-off – typically 15ns.
• High-gate-emitter impedance – typically 0.7V.
• High-gate-cathodeimpedance – typically 0.9V.

In addition to its main application in high-current pulse applications, the K1300S1URP can also be used in other applications, such as power factor correction, harmonic limiter, overvoltage control and thyristor light dimmer.

One example of a thyristor light dimmer is the K1300S1URP dimmer, which uses an AC voltage to generate a DC voltage which is then applied to the gate of the device. This controls the amount of light output from the lamp, thereby dimming it. The dimmer uses a power triac switch and a snubber circuit (usually a parallel combination of resistors and capacitors) to control the AC current flow. This snubber circuit works to reduce the voltage spike generated when the triac switch is turned off.

K1300S1URPs are also used in the control of uninterruptible power supply (UPS) systems. In these systems, they are used in conjunction with a power MOSFET to control the power transfer between the mains and the UPS battery when a power failure occurs. When the mains power is lost, the power MOSFET is turned off and the K1300S1URP is turned on in order to transfer power from the battery to the load.

In summary, the K1300S1URP belongs to the family of TruTs, which are bidirectional triode thyristors with high-current ratings and wide visible-angle operation. Its main application is in high-current pulse applications such as pulse transmission, as well as in switching applications where fast response and high accuracy are required. It is also used for power factor correction, harmonic limiting, overvoltage control, and thyristor light dimming. Lastly, it is used in uninterruptible power supply systems in order to transfer power from the battery to the load in the event of a power failure.

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