1N4972US Zener diode with 39V nominal voltage and 5W power dissipation. Packaged in a through-hole SQ-MELF E package.
Mfr Part #:

1N4972US

Available from 1 distributors
Mfr Name: Microchip Technology
Microchip Technology
Zener diode with 39V nominal voltage and 5W power dissipation. Packaged in a through-hole SQ-MELF E package.
Total Stock: 3,000 pcs

1N4972US Available from 1 distributor

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1N4972US Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Forward Voltage
Impedance (Max) (Zzt)
Mounting Type
Operating Temperature
Operating Temperature Range
Package / Case
Power
Power Dissipation
Reverse Leakage Current
Supplier Device Package
Tape & Reel
Tolerance
Voltage
Zener Impedance
Zener Voltage

1N4972US Description

Short technical summary and product information.

The 1N4972US is a Zener diode from Microchip Technology offering a nominal zener voltage of 39V with a power dissipation rating of 5W. It features a zener impedance of 14Ω and a tolerance of ±5%. The reverse leakage current is 2µA at a reverse voltage of 29.7V, and the forward voltage is 1.5V at a forward current of 1A.

 

Designed for through-hole mounting, this diode comes in an SQ-MELF, E package (also known as E-MELF). It operates over a wide temperature range from -65°C to 175°C, making it suitable for rugged industrial and military applications.

 

Typical applications include voltage regulation, overvoltage protection, and reference voltage generation where high power handling and stable zener voltage are required. The robust E-MELF package provides high reliability in harsh environments.

1N4972US Quick Information

Product Type: Zener Diode
Canonical Name: 1N4972US Zener Diode, 39V, 5W, E-MELF
Subcategory: Single

1N4972US Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

1N4972US Features

  • Zener voltage rated at 39V.
  • Power dissipation of 5 watts.
  • Low forward voltage of 1.5V at 1A.
  • Wide operating temperature -65°C to 175°C.
  • Through-hole SQ-MELF E package.

1N4972US Applications

  • Voltage regulation in power supplies.
  • Overvoltage protection circuits.
  • Reference voltage sources.
  • High-reliability industrial electronics.

1N4972US FAQs

7 frequently asked questions generated from this part’s specifications.
What is the zener voltage of the 1N4972US?

39V

What is the power dissipation rating?

5W

What is the tolerance?

±5%

What is the reverse leakage current?

2µA at 29.7V reverse voltage

What is the forward voltage?

1.5V at 1A forward current

What is the operating temperature range?

-65°C to 175°C

What is the package type?

SQ-MELF, E (E-MELF)

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