1N2804B, 1N2846RB, and 1N4557B, 1N4564RB – Microsemi 50 Watt Zener Diodes

Category: Diodes, Electronics, Microsemi Corp

Overview

The Microsemi datasheet presents a series of 50 Watt Zener Diodes, specifically the 1N2804B through 1N2846B and the 1N4557B through 1N4564B, which are designed to provide voltage regulation across a wide voltage range from 3.9 V to 200 V. Suitable for high power applications, these diodes can handle up to 50 W of power when properly mounted and heat-sunk due to their low thermal resistance. Additionally, they come in a TO-204AD (TO-3) package, making them robust and durable.

Qualification and Compliance

These Zener diodes are available with various qualification levels such as JAN, JANTX, and JANTXV, meeting the rigorous standards of MIL-PRF-19500/114. Some part numbers are also available in reverse polarity to accommodate different circuit designs. Furthermore, for environmentally conscious applications, RoHS compliant versions are available for commercial-grade products.

Construction and Features

The diodes feature internal solder bond construction and are hermetically sealed, ensuring reliability and longevity. There are multiple Zener voltage options spanning from 3.9 V to 200 V, and voltage tolerances of 10%, 5%, 2%, and 1% are obtainable to cater to precise regulation needs. These diodes also demonstrate resilience to Electrostatic Discharge (ESD) as per MIL-STD-750 method 1020 and are inherently radiation hard as described in Microsemi MicroNote 050.

Applications and Benefits

The Zener diodes’ primary function is to regulate voltage over a diverse array of operating currents and temperatures, providing a stable voltage supply for various electronic components and systems. Due to their construction and quality, they offer the benefit of being non-sensitive to ESD and are inherently radiation hard, adding an extra layer of protection and reliability.

Maximum Ratings

The datasheet defines the maximum operating conditions for the diodes, including a junction temperature range of -65°C to +175°C, a storage temperature range of -65°C to +200°C, and a low thermal resistance junction to case of 2.0°C/W at a case temperature of 30°C ±3°C. The diodes have an average rated power dissipation of 50 W at a case temperature of ≤75°C with a power derating of 0.5 W/°C beyond this temperature. The forward voltage drop is specified at 1.5 V when a forward current of 10A is applied, and the maximum permissible solder temperature is 260°C for a duration of 10 seconds maximum.

Contact Information and Revision Status

Current contact information for Microsemi is provided for their Lawrence, MA, USA office and their Ennis, Ireland office, including phone and fax numbers. The datasheet is identified with revision number 3 and dated May 2, 2013, indicating the importance of checking the website for the latest information.