Mfr Part #:

1N3345B

Mfr Name: MSC

The Microsemi 1N3345B is a 50W Zener diode designed for voltage regulation applications. It features a broad voltage range and a robust DO-5 package.

✓ Total Stock: 30 pcs

$ Price Range: $0.99

1N3345B Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Partservice ✓ Non-Authorised Inventory information	30 pcs On Request	30 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

1N3345B Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	MSC
Forward Voltage	1.5V
Mounting Type	Through Hole
Tape & Reel	Not in Tape & Reel

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1N3345B Description

Short technical summary and product information.

The 1N3345B from Microsemi is a high-power 50W Zener diode belonging to the JEDEC registered 1N3305 thru 1N3350B series. It provides reliable voltage regulation across a wide range of voltages, from 3.9V to 200V.

This Zener diode is designed for operation up to 50W with adequate mounting and heat sinking, thanks to its low thermal resistance. Key electrical characteristics include a maximum forward voltage of 1.5V at 10A and standard voltage tolerances of ±5% (with B suffix), ±10% (with A suffix), and ±20% (no suffix). Custom tolerances are also available upon request.

Encased in an industry-standard DO-5 (DO-203AB) package, the 1N3345B is hermetically sealed and suitable for through-hole mounting. Its construction ensures durability and reliability in demanding applications. The diode is inherently radiation-hard and non-sensitive to ESD, making it suitable for various environments.

Applications include voltage regulation over a broad operating current and temperature range. The diode is available in standard polarity (anode to case) and reverse polarity (cathode to case) options. Military qualifications such as JAN, JANTX, and JANTXV are also available.

1N3345B Quick Information

Product Type: Zener Diode

Series: 1N3305-1N3350B

Canonical Name: 1N3345B 50W Zener Diode

Subcategory: Rectifier

1N3345B Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

1N3345B Estimated Pricing

Qty	Low	High
1+	$0.99	$0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

1N3345B Features

50W power dissipation capability.
Wide voltage range from 3.9V to 200V.
Standard DO-5 (DO-203AB) hermetically sealed package.
±5% standard voltage tolerance with B suffix.
Inherently radiation hard and ESD non-sensitive.

1N3345B Applications

Provides stable voltage regulation.
Suitable for high power applications.
Used in demanding environmental conditions.
Available with military qualifications.

1N3345B FAQs

5 frequently asked questions generated from this part’s specifications.

What is the Zener voltage range for the 1N3305-1N3350B and 1N4549B-1N4556B series?

The Zener voltage range for this series is from 3.9V to 200V.

What is the maximum DC power dissipation for the 1N3345B?

The maximum DC power dissipation is 50 watts at a case temperature below 75°C.

What is the standard voltage tolerance for the 1N3345B?

The standard voltage tolerance for parts with a 'B' suffix, like the 1N3345B, is ±5%.

What is the package type for the 1N3345B?

The 1N3345B is supplied in a DO-5 (DO-203AB) package.

What is the thermal resistance of the 1N3345B?

The maximum thermal resistance from junction to hexagonal base is 2.0°C/W, with a typical value of 1.5°C/W.