Microchip Technology 1N3343A

Mfr. Part

1N3343A

Manufacturer

Solid State Inc.

Y-IC is a quality distributor of Solid State Inc. We will provide you with the best products and services, fast response, and reliable supply support.

Detailed Description

High-power single Zener diode for robust voltage regulation. 120 V nominal Zener, 50 W max power, DO-5 stud-mount metal package. Wide operating junction temperature from -65°C to 175°C. ROHS3 compliant. Designed for chassis mounting with strong thermal conduction for demanding power applications.

Key Features

Zener voltage nominal 120 V

Power handling up to 50 W

Package DO-5 stud mount JEDEC DO-203AB

Tolerance ±10 percent

Forward voltage max 1.5 V at 10 A

Zener impedance max 40 ohms

Operating junction temperature -65°C to 175°C

Mounting type stud mount for secure mechanical and thermal attachment

RoHS ROHS3 compliant

Supplier device package DO-5

Supplied in box packaging

Key Advantages

Rugged stud-mount metal package enables efficient heat sinking and reliable operation under high power

Wide temperature range supports harsh environments

Simple, robust voltage clamp and regulation for high-voltage rails

High surge and current capability for transient suppression and crowbar-style protection

Standard JEDEC DO-5 footprint simplifies mechanical design and replacement across vendors

RoHS3 compliance supports modern regulatory requirements

Packaging

Type DO-5 stud mount JEDEC DO-203AB for chassis or heatsink mounting

Material Metal stud body with insulated top terminal and silicon die inside for durable, high-power use

Size Standard DO-5 mechanical envelope per JEDEC DO-203AB drawings. Typical DO-5 includes a threaded stud and a single top lead. Refer to the datasheet mechanical outline for exact dimensions

Pin configuration Two terminals total. The threaded stud is one terminal. The opposite top lead is the other terminal. Polarity and terminal assignment are marked on the package. Verify orientation before installation

Thermal characteristics Stud-to-heatsink thermal path enables high power dissipation when properly mounted with thermal compound and correct torque. Junction operating range -65°C to 175°C. Actual thermal performance depends on heatsink size, mounting, airflow, and interface materials

Electrical properties Zener voltage nominal 120 V. Tolerance ±10 percent. Zener impedance max 40 ohms. Forward voltage max 1.5 V at 10 A. Reverse current 5 A at 86.4 V as provided in parameters. Ensure adequate heat sinking for sustained high-power regulation

Lifecycle

Current status No public end-of-life notice available based on standard market information. Availability can vary by region and demand. Contact Y-IC for the latest supply status

Equivalent or alternative models JEDEC-cross devices with similar specs are commonly available from multiple reputable manufacturers. Examples include

- Vishay 1N3343A DO-5 50 W 120 V Zener

- Central Semiconductor 1N3343A DO-5 50 W 120 V Zener

- Microsemi Microchip 1N3343A DO-5 50 W 120 V Zener

- Semtech 1N3343A DO-5 50 W 120 V Zener

These parts share the same JEDEC number and package class. Verify exact electrical tolerances, test currents, and mechanical details in each vendor’s datasheet before substitution

If you need more equivalents or custom alternatives Please contact our sales team via our website for cross-reference support, lead times, and technical guidance

Key Application Areas

High-voltage rail regulation and reference for power supplies

Transient and surge suppression for industrial and automotive systems

Over-voltage protection and crowbar or clamp circuits

Load-dump and line clamp protection in transportation and heavy equipment

HV instrumentation, test gear, and bias networks

Motor drives, UPS, and energy systems requiring rugged voltage limiting

Telecom and utility infrastructure where stud-mount thermal performance is critical

Datasheet

Our website provides the most authoritative datasheet for the current 1N3343A model. We recommend downloading it directly on this page to get complete electrical curves, mechanical outlines, mounting torque guidelines, and thermal derating information.

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