E-501

Current Regulation - Diodes, Transistors Overview

The Semitec USA Corp E-501 is a leaded current regulating diode (CRD) from the S series, designed to maintain constant current flow despite voltage fluctuations. It operates within a wide voltage range of less than 1V to 100V and handles ripple voltage independently. The component features a rated power of 300 mW and a maximum rated voltage of 100 V for pulse waves. Its pinch-off current at 10 V is typically 0.50 mA, with a limiting current ratio ranging from +0.15% to -0.25% per degree Celsius. The device supports an operating temperature range of -30°C to 150°C and a junction temperature up to 150°C.

Current Regulation - Diodes, Transistors Feature Summary

• Maintains constant current regardless of applied voltage or load resistance changes
• Single-component solution replacing multi-part constant current circuits
• Operates effectively across a wide voltage range from under 1V to 100V

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 against official documentation to confirm packaging type, as standard bulk and taping options vary by series. Confirm RoHS compliance status directly with the manufacturer before procurement. Ensure the selected part number matches the required pinch-off current tolerance for the intended circuit design.

Current Regulation - Diodes, Transistors Selection Notes

Select the E-501 when a leaded package is required for a 0.50 mA constant current application. Consider the 300 mW power rating and -30°C to 150°C operating range during thermal design. For higher current needs, multiple units can be arranged in rows. Verify if the SMD variant is preferred for automated assembly processes.

Current Regulation - Diodes, Transistors Part Context

The E-501 belongs to Semitec's CRD product line, which simplifies constant current generation compared to traditional multi-component designs. It serves as a direct alternative to complex biasing networks in analog and power management circuits. The component is widely used in lighting and sensor applications requiring stable current regulation.

Current Regulation - Diodes, Transistors Replacement Considerations

The S-501T is the surface-mount equivalent of the E-501. Both share identical electrical characteristics including the 0.50 mA pinch-off current. Substitution requires adapting the PCB footprint from through-hole to SMD dimensions.