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1N2989B 1N2989B is a 30V, 10W Zener diode in a DO-203AA (DO-4) stud mount package. It features a maximum impedance of 8 Ω and ±5% tolerance.
Mfr Part #:

1N2989B

Available from 1 distributors
Mfr Name: Solid State Devices Inc (SSDI)
Solid State Devices Inc (SSDI)
1N2989B is a 30V, 10W Zener diode in a DO-203AA (DO-4) stud mount package. It features a maximum impedance of 8 Ω and ±5% tolerance.
Total Stock: 1 pcs

1N2989B Available from 1 distributor

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1N2989B Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Derating Factor
Forward Voltage
Halogen Free
Impedance (Max) (Zzt)
Lead Style
Military Grade
Mounting Type
Operating Temperature
Operating Temperature - Junction
Package / Case
Polarity
Power
Power Dissipation
Reverse Leakage Current
SVHC Present
Storage Temperature
Supplier Device Package
Termination
Thermal Resistance - Junction to Case
Tolerance
Voltage
Zener Voltage (Nominal)

1N2989B Description

Short technical summary and product information.

The 1N2989B is a single Zener diode with a nominal Zener voltage of 30V and a power dissipation of 10W. It is designed for voltage regulation applications over a broad range of current and temperature.

 

Key electrical characteristics include a maximum impedance of 8 Ω at the Zener test current, a forward voltage of 1.5V at 2A, and a reverse leakage current of 5 µA at 22.8V. The device offers a tolerance of ±5%.

 

The diode is housed in a DO-203AA (DO-4) industry standard metal package with stud mounting. It operates over a junction temperature range of -65°C to +175°C and is hermetically sealed for reliable performance.

1N2989B Quick Information

Product Type: Zener Diode
Series: 1N2989B
Canonical Name: 1N2989B Zener Diode 30V 10W Stud Mount DO-203AA
Subcategory: Single Zener Diode

1N2989B Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: No

1N2989B Features

  • 30V nominal Zener voltage with ±5% tolerance.
  • 10W power dissipation rating.
  • Low maximum impedance of 8 Ω.
  • Hermetically sealed DO-203AA stud mount package.
  • Operating junction temperature from -65°C to 175°C.

1N2989B Applications

  • Used in voltage regulation circuits.
  • Suitable for overvoltage protection applications.
  • Ideal for power supply clamping and referencing.
  • Applicable in industrial and military power systems.

1N2989B FAQs

4 frequently asked questions generated from this part’s specifications.
What is the Zener voltage of the 1N2989B?

The nominal Zener voltage is 30V with a tolerance of ±5%.

What is the maximum power dissipation?

The power dissipation is 10W at a case temperature of +55°C.

What is the package type and mounting?

The package is DO-203AA (DO-4) stud mount.

What is the forward voltage?

The forward voltage is 1.5V at a forward current of 2A.

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