K2500GH

Overview

The Littelfuse K2500GH is a high-voltage trigger diode (SIDAC) designed for surge protection applications. It operates within the Kxxxzy series and utilizes a DO-15 through-hole package. The device features a breakover voltage (VBO) range of 240 V to 280 V and a rated repetitive off-state voltage (VDRM) of 200 V. It supports an RMS on-state current (It RMS) of 1 A and a non-repetitive peak on-state current of up to 20 A. The component functions reliably across a temperature range of -40°C to +85°C, with a maximum holding current of 150 mA and an on-state voltage of 1.5 V.

Feature Summary

• High-energy discharge capability suitable for transient voltage suppression
• Bidirectional switching characteristic for AC circuit protection
• Robust construction in a standard DO-15 axial leaded package

Applications

• Surge protection for telephone lines and data interfaces
• Triggering elements for silicon controlled rectifiers (SCRs)
• Overvoltage protection in industrial control systems

Procurement Notes

Verify the specific datasheet revision and RoHS compliance status directly with Littelfuse or authorized distributors before procurement. Confirm that the DO-15 package dimensions match the target PCB layout requirements. Ensure the supply chain source is authorized to guarantee component authenticity and traceability for critical safety applications.

Selection Notes

Select the K2500GH when a breakover voltage between 240 V and 280 V is required for triggering protective circuits. Consider the 1 A RMS current rating for continuous load conditions and the 20 A peak capability for surge events. Evaluate the DO-15 package constraints against available board space and thermal management needs compared to surface-mount alternatives.

Part Context

The K2500GH belongs to the Littelfuse Kxxxzy SIDAC family, which provides bidirectional breakdown characteristics for overvoltage protection. These devices are distinct from unidirectional TVS diodes, offering symmetrical switching behavior ideal for AC line protection. The K-series is widely recognized for its reliability in telecommunications and industrial environments requiring robust transient suppression.

Replacement Considerations

Cross-reference with other SIDACs featuring similar VBO ranges (240-280 V) and DO-15 packaging. Verify that substitute components meet the same It RMS and peak current specifications. Ensure compatibility with existing trigger thresholds in SCR-based protection circuits without altering system performance.