K1500E70RP3

Overview

The Littelfuse K1500E70RP3 is a silicon bilateral voltage-triggered switch (SIDAC) from the Kxxxzy series, housed in a TO-92 package with Type 70 lead form. It features glass-passivated junctions for ruggedness and RoHS compliance. Key electrical parameters at TJ = 25°C include a breakover/trigger voltage (VBO) range of 140V to 170V and a repetitive peak off-state voltage (VDRM) of 90V. The device supports an on-state RMS current (IT(RMS)) of 1A at 50/60Hz with a junction temperature below 125°C. Peak non-repetitive surge current (ITSM) is rated at 16.7A for a single cycle at 50Hz. Thermal resistance from junction to ambient (RθJA) is 95°C/W.

Feature Summary

• Silicon bilateral voltage triggered switch utilizing negative resistance region for low on-state voltage conduction.
• Glass-passivated junctions ensure dependable performance in harsh environments.
• RoHS compliant construction with matte tin plated terminals.

Applications

• High voltage power supplies
• Natural gas igniters
• High-pressure Sodium lamps
• Xenon flash ignition

Procurement Notes

Verify the specific ordering suffix E70RP3 corresponds to the TO-92 package with Type 70 lead form and reel pack packaging mode containing 2000 units per base quantity. Confirm that the component marking matches the standard format for this series. Ensure storage conditions remain within the specified -40°C to 150°C range prior to assembly. Check for any recent datasheet revisions that may impact mechanical dimensions or thermal characteristics.

Selection Notes

Select this component when a breakover voltage between 140V and 170V is required for triggering circuits. The TO-92 package is suitable for through-hole mounting applications requiring radial leads. Ensure the circuit design accounts for the 90V VDRM limit to prevent unintended triggering during normal operation. Verify that the expected surge currents do not exceed the ITSM ratings for the specific duty cycle.

Part Context

This part belongs to the Littelfuse Kxxxzy Series of Standard Bidirectional SIDACs. The 'K' denotes the SIDAC device type, '150' indicates the switching voltage class (140V-170V), '0' signifies standard circuit function, 'E' identifies the TO-92 package, '70' specifies the lead form, and 'RP3' indicates the reel pack packaging option for TO-92 components.

Replacement Considerations

Other parts in the K1500y series such as K1500G or K1500S offer the same electrical characteristics but differ in package type (DO-15 or DO-214). Substitution requires verifying mechanical fit and soldering compatibility. No direct pin-for-pin replacement exists in different packages without PCB modification.