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Product Detailed Parameters
- Description：DIODE ZENER 33V 50W DO5
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：33 V
- Tolerance：±5%
- Power - Max：50 W
- Impedance (Max) (Zzt)：3.2 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 25.1 V
- Operating Temperature：-65°C ~ 175°C
- Mounting Type：Chassis, Stud Mount
- Package / Case：DO-203AB, DO-5, Stud
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 10 A
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N3325RB is a high-power 50 W Zener diode with a nominal voltage of 33 V and a tolerance of ±5%. It features reverse polarity, connecting the cathode to the case. The device operates within a temperature range of -65°C to +175°C and utilizes a DO-5 (DO-203AB) metal-glass package. Electrical characteristics include a maximum dynamic impedance of 3.2 Ω at the test current of 380 mA.
Feature Summary
- Hermetically sealed welded construction for environmental protection
- Internal solder bond design for mechanical stability
- Reverse polarity configuration with cathode connected to the case
- Inherently radiation hard and non-sensitive to electrostatic discharge
Applications
- Voltage regulation in high-power industrial systems
- Protection circuits requiring robust thermal performance
- Military and aerospace applications utilizing JAN/JANTX levels
Procurement Notes
Verify the specific ordering suffix to confirm the reverse polarity designation and tolerance level. Ensure that adequate heat sinking is provided to maintain the junction temperature within the specified limits during operation. Confirm compliance requirements if military screening levels are necessary for the intended application environment.
Selection Notes
Select this component when a 33 V reference with high power dissipation capability is required. The reverse polarity option allows the case to serve as the cathode terminal, which may simplify grounding or mounting strategies in specific circuit topologies. Verify that the thermal resistance and mounting hardware meet the system's heat dissipation needs.
Part Context
This part belongs to the 1N3305B through 1N3350B series of 50 W Zener diodes manufactured by Microchip Technology. The series covers a broad voltage range from 3.9 V to 200 V. These devices are designed for demanding environments and are available in various military qualification levels including JAN, JANTX, and JANTXV.
Replacement Considerations
Equivalent parts within the same series include 1N3325B for standard polarity. Other manufacturers producing JEDEC registered equivalents should be verified against the specific electrical parameters and hermetic sealing requirements.
