K3601G

Overview

The Littelfuse K3601G is a high-voltage trigger diode, classified as an SIDAC within the thyristor product category. Manufactured by Littelfuse, this component utilizes a DO-15 through-hole package for robust mounting. It features a breakover voltage (VBO) range of 270 V to 330 V and a maximum breakover current (IBO) of 10 uA. The device supports a non-repetitive on-state current of 16.7 A or 20 A and maintains a rated repetitive off-state voltage (VDRM) of 200 V. With a holding current (Ih) maximum of 150 mA and an on-state voltage of 1.5 V, it operates reliably between -40 C and +85 C.

Feature Summary

• Bidirectional switching capability for AC circuit triggering applications
• Integrated thermal stability with glass-passivated junction technology
• High surge current handling capacity for transient protection roles

Applications

• Triggering circuits for silicon-controlled rectifiers (SCRs)
• Overvoltage protection in industrial control systems
• Phase control networks in lighting dimmers

Procurement Notes

Verify the specific suffix codes against official Littelfuse documentation to confirm exact electrical tolerances and packaging configurations. Ensure that the DO-15 lead form matches the target PCB layout requirements. Confirm RoHS compliance status directly from the manufacturer's latest release notes before finalizing procurement orders.

Selection Notes

Select the K3601G when a precise high-voltage trigger threshold between 270 V and 330 V is required for gate drive applications. Evaluate the 16.7 A or 20 A non-repetitive current rating against peak load conditions. Consider the DO-15 package size constraints and the -40 C to +85 C operating temperature range relative to the environmental conditions of the end-use equipment.

Part Context

The K3601G belongs to the Kxxx1G series of high-voltage trigger diodes produced by Littelfuse. This series is designed specifically for reliable switching in high-voltage environments. The component serves as a critical interface element between low-power control signals and high-power thyristor gates, ensuring stable operation in demanding industrial and commercial power electronics applications.

Replacement Considerations

Consult Littelfuse official substitution guides for compatible SIDAC devices with matching VBO ranges. Verify pinout compatibility for DO-15 packages when considering alternative manufacturers. Ensure equivalent surge current ratings are maintained to prevent premature failure in existing circuit designs.