Microsemi 500 mW Metallurgically Bonded Glass Surface Mount Zener Diodes

Category: Diodes, Electronics, Microsemi Corp

Overview

The datasheet details the series of Zener voltage regulators designed by Microsemi, including models from the 1N4614UR-1 to the 1N4627UR-1, and 1N4099UR-1 to the 1N4135UR-1. These devices are 500 mW, metallurgically bonded glass surface mount Zener diodes. They have been qualified for multiple military standards, offering a range of voltage tolerance options.

Features

The Zener diodes described in this datasheet are surface mount equivalents to the JEDEC registered series they replace. They feature an internal metallurgical bond and exhibit low noise density. The diodes are available with qualifications up to JANS per MIL-PRF-19500/435 for high-reliability applications. RoHS compliant commercial grade versions are offered, with “CDLL” and prior “MLL” prefixes indicating their compliance.

The datasheet also informs that these Zener diodes are offered in alternative packages such as DO-35 and DO-216, with different model numbers for varying applications.

Applications and Benefits

The diodes are capable of regulating voltage across wide ranges of current and temperature, offering varieties of 1.8 to 100 volts. Available voltage tolerances include the standard 5%, with 2% and 1% options also available. Designed with a hermetically sealed surface mount package, they are non-sensitive to Electrostatic Discharge (ESD) as per MIL-STD-750 method 1020. The devices feature minimal capacitance, and are inherently resistant to radiation effects.

Maximum Ratings

Operating junction and storage temperatures range from minus 65°C to plus 175°C. The datasheet specifies thermal resistance from the junction to ambient and the junction to end cap, with a rated average power dissipation of 0.5W. The forward voltage is set at 1.1V for a forward current of 200mA. The recommended solder temperature for the devices during mounting should not exceed 260°C for 10 seconds.

Additional Information

The datasheet includes a disclaimer regarding the mounting process, emphasizing the linear derating of power from the maximum of 500 mW beginning at 25°C, decreasing to zero at 175°C. This is applicable for typical PCB ambient conditions and based on mounting on an FR4 PC board with a recommended footprint.

Contact Information

Microsemi provides physical locations and contact information for inquiries, including addresses, telephone, and fax numbers for their locations in Lawrence, Massachusetts, USA, and Ennis, County Clare, Ireland.