K2201G

Overview

The Littelfuse K2201G is a high-voltage trigger diode, classified as a SIDAC within the thyristor family. It operates in the DO-15 through-hole package and supports an operating temperature range from -40°C to +85°C. The device features a breakover voltage (VBO) between 205 V and 230 V, with a maximum turn-on current (IBO) of 10 µA. It sustains a rated repetitive off-state voltage (VDRM) of 180 V and exhibits a leakage current of 5 µA under VDRM conditions. The component handles a non-repetitive on-state current of up to 20 A and maintains an RMS on-state current rating of 1 A. Upon triggering, it demonstrates an on-state voltage of 1.5 V and a maximum holding current (Ih) of 150 mA.

Feature Summary

• Bidirectional switching capability for AC phase control applications
• Integrated gate trigger function eliminating discrete diac assembly
• Robust construction with glass-passivated junctions for parameter stability

Applications

• Lighting controls requiring noise immunity
• Temperature modulation circuits
• AC speed control systems

Procurement Notes

Verify the specific Littelfuse datasheet for the K2201G to confirm RoHS compliance status and REACH SVHC declarations prior to integration. Ensure the DO-15 through-hole mounting style aligns with the target PCB layout requirements. Cross-reference the electrical parameters against the design specifications to guarantee compatibility with the intended circuit environment.

Selection Notes

Select the K2201G when a bidirectional trigger device with a 220 V nominal breakover voltage is required for AC switching. This component integrates the trigger function directly, simplifying designs that would otherwise require separate diacs. Verify that the 1 A RMS current rating and 20 A surge capacity meet the load demands of the specific application circuit.

Part Context

The K2201G belongs to the Kxxxzy series of high-voltage trigger diodes manufactured by Littelfuse. These devices are categorized as SIDACs, which are silicon diodes for alternating current designed for high-voltage triggering. The series provides reliable switching characteristics suitable for industrial and consumer electronics applications requiring precise voltage threshold management.

Replacement Considerations

The K2200G is a confirmed substitute part number within the same Littelfuse series, sharing identical electrical specifications and package dimensions.