E-123

Current Regulation - Diodes, Transistors Overview

The Semitec E-123 is a leaded current regulating diode designed to maintain a constant current flow despite voltage fluctuations. It delivers a typical pinch-off current of 12 mA at 10 V, with a minimum range of 9.60 mA and a maximum of 14.4 mA. The device operates within an allowable temperature range of -30°C to +150°C and supports a rated power of 300 mW. It features a limiting current ratio (I100V/Ip) between 0.8 and 1.1, and a breakdown voltage (Vk) of 3.8 V. The component is housed in an axial through-hole package.

Current Regulation - Diodes, Transistors Feature Summary

• Maintains constant current output across a wide voltage range from less than 1V to 100V
• Simplifies circuit design by replacing multiple components with a single part for constant current generation
• Provides stable operation regardless of load resistance changes or ripple voltage fluctuations

Current Regulation - Diodes, Transistors Applications

• Constant current source for LED brightness stabilization
• Constant voltage circuit for supplying constant current to Zener diodes
• Battery charge and discharge circuits
• Current source for piezoelectric actuators
• Telecommunications line interface

Current Regulation - Diodes, Transistors Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm packaging type, as standard bulk products may lack markings while taped versions utilize specific width configurations. Confirm RoHS compliance status directly with the supplier prior to procurement. Ensure the selected variant matches the required axial lead style for the intended mounting application.

Current Regulation - Diodes, Transistors Selection Notes

Select the E-123 when a fixed 12 mA current regulation is required in through-hole designs. Consider the 300 mW power rating and ensure adequate thermal management for operation near the upper temperature limit. Verify that the operating voltage remains within the recommended maximum limits for the E-series to prevent breakdown. Evaluate if the temperature coefficient meets the stability requirements of the target application.

Current Regulation - Diodes, Transistors Part Context

The E-123 belongs to the Semitec E series of current regulating diodes, which are characterized by their leaded axial construction. This series is distinct from the S series, which utilizes surface-mount technology. The E series is generally rated for 300 mW power dissipation and operates within a -30°C to +150°C temperature range, catering to applications requiring robust through-hole integration.

Current Regulation - Diodes, Transistors Replacement Considerations

Direct replacements must match the 12 mA pinch-off current and axial package form factor. Cross-reference specifications such as limiting current ratio and breakdown voltage to ensure functional equivalence. Verify that any substitute component meets the same thermal and power dissipation ratings for reliable operation.