E-103

Current Regulation - Diodes, Transistors Overview

The Semitec USA Corp E-103 is a leaded current regulating diode (CRD) from the E series, designed to maintain constant current flow despite voltage fluctuations. It features a rated power of 300 mW and a maximum rated voltage of 100 V. The device operates within a temperature range of -30°C to +150°C with a junction temperature limit of 150°C. At 10 V, the typical pinch-off current is 10.0 mA, with a minimum of 8.00 mA and a maximum of 12.4 mA. The limiting current at 100 V is typically 0.5 mA, and the device exhibits a temperature coefficient ranging from -0.25% to -0.45% per °C.

Current Regulation - Diodes, Transistors Feature Summary

• Maintains constant current over 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 current output regardless of load resistance changes or ripple voltage

Current Regulation - Diodes, Transistors Applications

• Constant current source for LED brightness stabilization
• Battery charge and discharge circuits
• Current source for piezoelectric actuators
• Telecommunications line interface
• Earth leakage circuit breakers

Current Regulation - Diodes, Transistors Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm packaging type, as axial taping options include reel or box configurations. Ensure the selected variant meets the required operating temperature range and power dissipation limits for the target application environment.

Current Regulation - Diodes, Transistors Selection Notes

Select the E-103 when a leaded component is required for currents around 10 mA. Consider using a compensation resistor if current reduction due to self-heating needs mitigation. Verify that the 300 mW rated power is sufficient for the thermal conditions of the final assembly.

Current Regulation - Diodes, Transistors Part Context

The E-103 belongs to Semitec's E series of current regulating diodes, which are characterized by their leaded axial construction. This series is distinct from the S series, which offers surface mount variants. The E series is generally suited for through-hole mounting applications requiring robust mechanical connections.

Current Regulation - Diodes, Transistors Replacement Considerations

The S-103T is the surface mount equivalent in the same product family, sharing identical electrical characteristics including the 10 mA pinch-off current. Direct replacement requires adapting the PCB footprint from axial leads to the SMD package dimensions.