K3601GL

Overview

The Littelfuse K3601GL is a bidirectional voltage switch from the Multipulse™ SIDAC series, designed for high-voltage ignition applications. It features a DO-15 axial leaded package with glass passivated junctions and tin-plated copper alloy leads. The device triggers within a breakover voltage range of 340 V to 380 V and supports a repetitive peak off-state blocking voltage (VDRM) of 270 V minimum. It handles an on-state RMS current of 1 A and non-repetitive surge currents up to 50 A (10 µs pulse). Key electrical parameters include a maximum on-state voltage of 3 V at 1 A, a holding current of approximately 30 mA, and a commutation time of 100 µs. Operating temperatures range from -40 °C to +125 °C.

Feature Summary

• Designed for robust operation in lamp igniter circuits requiring multiple pulses per half cycle
• Glass passivated junctions ensure reliability under high ambient temperatures up to 90°C
• DO-15 axial leaded package suitable for through-hole mounting

Applications

• Metal-Halide lamp ignition circuits
• High Pressure Sodium lamp ignition circuits for outdoor street and area lighting

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging configuration. Standard bulk quantities are typically 1000 units, while reel packs contain 5000 units and ammo packs contain 2000 units. Confirm RoHS compliance status directly with the supplier or datasheet revision notes prior to finalizing procurement orders.

Selection Notes

Select the K3601GL when a higher trigger voltage between 340 V and 380 V is required compared to lower voltage variants in the Kxxx1GL family. Ensure the circuit design accommodates the 270 V minimum blocking voltage and that thermal management allows for junction temperatures up to 125 °C during continuous operation.

Part Context

The K3601GL belongs to the Kxxx1GL series of Multipulse™ SIDACs manufactured by Littelfuse. This series includes other voltage ratings such as K2201GL, K2401GL, and K2501GL, all sharing the same DO-15 package and general electrical characteristics but differing in their specific breakover and blocking voltage thresholds.

Replacement Considerations

Direct replacements within the same family include K2201GL, K2401GL, and K2501GL, provided the application can tolerate their respective lower trigger voltages. Cross-family substitution requires careful verification of voltage ratings, package dimensions, and thermal characteristics.