CDLL3047B-1

Diodes - Zener - Single

The CDLL3047B-1 is a single zener diode in a SOT-23 package. It is designed for use in applications where a low forward voltage drop, low noise, maximum junction temperature, and a wide operating temperature range are required. The CDLL3047B-1 features a very low forward voltage drop, an extremely low on-state resistance, and a low reverse recovery charge, making it suitable for a variety of applications.

Application Field:

The CDLL3047B-1 is an ideal diode for applications including over-voltage protection, switching current limiters, and noise suppression. In automotive applications, such as high-current ignition applications, the high reverse pinch-off voltage of the CDLL3047B-1 ensures reliable current limiting and over-voltage protection.

Working Principle:

The CDLL3047B-1 works by allowing a current to pass in the forward direction, while blocking any current in the reverse direction. When the reverse voltage exceeds the Zener breakdown voltage, the diode begins to conduct current in the reverse direction, creating a reverse bias voltage across the diode which prevents current from flowing in the reverse direction. This action helps prevent overvoltage conditions by limiting the achievable voltage to just above the Zener breakdown voltage.

Other Features:

The CDLL3047B-1 also offers a number of other features, such as a wide operating temperature range (-40C to +125C), a very low forward voltage drop (1.2V typical), and an extremely low on-state resistance (5 Ohms typical). Additionally, it benefits from a tight Zener voltage tolerance (1.25V - 5.5V), a low reverse-recovery charge (only 0.2 microcoulombs of reverse-recovery charge), and a low capacitance (only 0.1 pF reverse-recovery capacitance).

Conclusion:

The CDLL3047B-1 is an ideal diode for applications such as over-voltage protection, switching current limiters, and noise suppression. It features a very low forward voltage drop, an extremely low on-state resistance, a wide operating temperature range (-40C to +125C), and a low reverse-recovery charge. Additionally, it benefits from a tight Zener voltage tolerance, and a low capacitance.