E-301

Current Regulation - Diodes, Transistors Overview

The Semitec E-301 is a leaded current regulating diode (CRD) designed to maintain a constant current flow despite voltage fluctuations. It features a rated power of 300 mW and supports a maximum rated voltage of 100 V. The device operates within an ambient temperature range of -30°C to +150°C, with a junction temperature limit of 150°C. The typical pinch-off current at 10 V is 0.3 mA, with a minimum of 0.2 mA and a maximum of 0.4 mA. The limiting current ratio (I100V/Ip) ranges from +0.40 to -0.20, and the temperature coefficient varies between +0.40%/°C and -0.20%/°C.

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
• Operates reliably under varying load resistance changes and ripple voltage conditions

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 to confirm package type, as Semitec uses distinct codes for axial leaded versus surface mount variants. Confirm that the required pinch-off current tolerance aligns with the standard manufacturing specifications provided in the datasheet. Ensure thermal management strategies account for the 300 mW power rating during operation.

Current Regulation - Diodes, Transistors Selection Notes

Select the E-301 when a leaded component is preferred over surface mount options. Verify that the application voltage remains below the 100 V maximum rating. Consider the negative temperature coefficient characteristics when designing circuits sensitive to thermal drift. Use external resistors if compensation for current reduction due to self-heating is required for higher precision.

Current Regulation - Diodes, Transistors Part Context

The E-301 belongs to the Semitec E series of current regulating diodes, which are axial leaded devices. This series shares functional similarities with the S series but differs in packaging and operating temperature ranges. The E series is generally suited for through-hole mounting applications where robust mechanical connections are necessary.

Current Regulation - Diodes, Transistors Replacement Considerations

Direct replacements include other Semitec E-series CRDs with similar pinch-off currents, such as the E-272 or E-352, depending on exact current requirements. Cross-manufacturer equivalents should be verified against the 300 mW power rating and 100 V breakdown voltage limits.