E-452

Current Regulation - Diodes, Transistors Overview

The Semitec E-452 is a current regulating diode (CRD) designed to maintain a constant current flow despite voltage fluctuations. It operates within a wide voltage range from less than 1V to 100V, ensuring stable performance regardless of applied voltage changes, load resistance variations, or ripple voltage. The device features a pinch-off current of 4.5 mA and a maximum limiting voltage of 3.7 V. It supports an operating temperature range from -30°C to +150°C with a junction temperature limit of 150°C. The component utilizes a through-hole axial package configuration.

Current Regulation - Diodes, Transistors Feature Summary

• Maintains constant current output across a broad voltage spectrum
• Requires only a single component for constant current circuit implementation
• Provides stability against load resistance changes and ripple voltage

Current Regulation - Diodes, Transistors Applications

• Constant current source for LED brightness stabilization
• Battery charge and discharge circuits
• Current source for piezoelectric actuators
• Stabilized power supply circuits

Current Regulation - Diodes, Transistors Procurement Notes

Verify the specific ordering suffix to confirm packaging type, as bulk products may lack markings while taped versions follow specific width and folding standards. Confirm compliance with RoHS directives and ensure the selected variant matches the required thermal and electrical ratings for the target application environment.

Current Regulation - Diodes, Transistors Selection Notes

Select the E-series for through-hole mounting requirements where axial taping options are preferred. Ensure the rated power of 300 mW is sufficient for the intended duty cycle. Consider using compensation resistors if current reduction due to heat-up needs mitigation, particularly for currents exceeding 1 mA.

Current Regulation - Diodes, Transistors Part Context

The E-452 belongs to Semitec's E series of current regulating diodes, which are characterized by their leaded axial construction. This series shares functional similarities with the S series but differs in package style and specific thermal characteristics, catering to different assembly preferences.

Current Regulation - Diodes, Transistors Replacement Considerations

Direct substitutes include other CRDs with matching 4.5 mA pinch-off current and 100V rating. Verify pinout compatibility and thermal resistance values when replacing with components from other manufacturers.