1N4728A-T Zener diode with nominal voltage 3.3V, power dissipation 1W, and ±5% tolerance. Housed in a DO-41 through-hole package.
Mfr Part #:

1N4728A-T

Available from 1 distributors
Mfr Name: Diodes Incorporated
Diodes Incorporated
Zener diode with nominal voltage 3.3V, power dissipation 1W, and ±5% tolerance. Housed in a DO-41 through-hole package.
Total Stock: 1,760 pcs

1N4728A-T Available from 1 distributor

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1N4728A-T Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Case Material
Current
Impedance (Max) (Zzt)
Lead Style
Mounting Type
Operating Temperature
Polarity
Power
Storage Temperature Range
Supplier Device Package
Surge Current (Max)
Tape & Reel
Temperature Coefficient
Terminal Finish
Termination Style
Test Current
Thermal Resistance Junction-to-Ambient
Tolerance
Voltage
Weight
Zener Impedance (Maximum @ IZK = 1 mA)
Zener Voltage (Nominal)

1N4728A-T Description

Short technical summary and product information.

The 1N4728A-T is a 3.3V Zener diode from Diodes Incorporated, designed for general-purpose voltage regulation and clamping applications. It offers a nominal Zener voltage of 3.3V at a test current of 76 mA, with a tolerance of ±5%. The device can dissipate up to 1W of power, making it suitable for low-power circuits.

 

Key electrical characteristics include a maximum Zener impedance of 10 Ω at IZT and 400 Ω at IZK, a maximum reverse leakage current of 100 µA at 1V, and a forward voltage of 1.2V at 200 mA. The diode can handle a surge current of up to 1380 mA for 8.3 ms. The operating temperature range spans -65°C to 175°C.

 

The device is housed in a DO-41 (DO-204AL) through-hole package with axial leads. The case is made of glass with a tin-silver (Sn96.5Ag3.5) terminal finish. Polarity is indicated by a cathode band. The component weighs approximately 0.35 grams.

 

The datasheet for the 1N4728A-1N4761A series indicates that these parts are obsolete and discontinued. No alternate part is listed. Compliance includes RoHS3 and lead-free finish.

1N4728A-T Quick Information

Product Type: Zener Diode
Series: 1N4728A-1N4761A
Canonical Name: 1N4728A-T Zener Diode, 3.3V, 1W, DO-41
Subcategory: Single Zener Diode

1N4728A-T Compliance

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

1N4728A-T Features

  • Nominal Zener voltage of 3.3V.
  • Power dissipation rating of 1W.
  • ±5% tolerance on Zener voltage.
  • DO-41 through-hole package.
  • RoHS3 compliant with lead-free finish.

1N4728A-T Applications

  • Voltage regulation in low-power circuits.
  • Overvoltage protection and clamping.
  • Reference voltage generation.
  • Surge suppression in DC lines.

1N4728A-T FAQs

7 frequently asked questions generated from this part’s specifications.
What is the Zener voltage of the 1N4728A-T?

The nominal Zener voltage is 3.3V at a test current of 76 mA.

What is the power dissipation rating?

The power dissipation is 1W.

What is the forward voltage?

The maximum forward voltage is 1.2V at a forward current of 200 mA.

What is the package type?

The device is available in a DO-41 (DO-204AL) through-hole axial package.

What is the operating temperature range?

The operating temperature range is -65°C to 175°C.

What is the tolerance on the Zener voltage?

The tolerance is ±5%.

Is this part RoHS compliant?

Yes, it is RoHS3 compliant with a lead-free finish.

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