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1N4550B The 1N4550B is a 4.3V Zener diode rated for 50W power dissipation. It features a stud mount DO-5 package and operates from -65°C to 175°C.
Mfr Part #:

1N4550B

Available from 1 distributors
Mfr Name: Solid State Devices Inc (SSDI)
Solid State Devices Inc (SSDI)
The 1N4550B is a 4.3V Zener diode rated for 50W power dissipation. It features a stud mount DO-5 package and operates from -65°C to 175°C.
Total Stock: 6,500 pcs

1N4550B Available from 1 distributor

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Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
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6,500 pcs
6500 pcs On Request 1 On Request On Request On Request On Request On Request

1N4550B 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
Package / Case
Power
Reverse Leakage Current
Supplier Device Package
Tape & Reel
Tolerance
Voltage
Zener Voltage

1N4550B Description

Short technical summary and product information.

The 1N4550B is a Zener diode from Solid State Devices Inc designed for voltage regulation applications. It offers a nominal Zener voltage of 4.3V with a tolerance of ±10% and a maximum power dissipation of 50W. The diode features a low impedance of 0.16Ω and a forward voltage of 1.5V at 10A. Reverse leakage current is 150µA at 500mV. The device is housed in a DO-203AB (DO-5) stud mount package, suitable for high-power through-hole mounting. It operates over a wide temperature range of -65°C to 175°C, making it suitable for harsh environments. Typical applications include voltage clamping, overvoltage protection, and reference voltage generation in power supplies and industrial equipment.

1N4550B Quick Information

Product Type: Zener Diode
Canonical Name: 1N4550B Zener Diode, 4.3V, 50W, DO-5
Subcategory: Single Zener Diode

1N4550B Compliance

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

1N4550B Features

  • 4.3V nominal Zener voltage with ±10% tolerance.
  • 50W power dissipation capability.
  • Low impedance of 0.16Ω for stable regulation.
  • Stud mount DO-5 package for high power.
  • Wide operating temperature range -65°C to 175°C.

1N4550B Applications

  • Used in voltage regulation circuits.
  • Suitable for overvoltage protection.
  • Ideal for reference voltage generation.
  • Applied in power supply designs.
  • Used in industrial equipment.

1N4550B FAQs

7 frequently asked questions generated from this part’s specifications.
What is the Zener voltage of the 1N4550B?

4.3V

What is the power rating of the 1N4550B?

50W

What is the tolerance of the Zener voltage?

±10%

What is the forward voltage?

1.5V at 10A

What package does the 1N4550B come in?

DO-203AB (DO-5) stud mount

What is the operating temperature range?

-65°C to 175°C

What is the dynamic impedance?

0.16Ω

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