1SMA4742 R3G Taiwan Semiconductor 1SMA4742 R3G is a 12V Zener diode in a DO-214AC (SMA) surface mount package. It offers 1.25W power dissipation and ±5% voltage tolerance.
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1SMA4742 R3G

Available from 1 distributors
Mfr Name: Taiwan Semiconductor
Taiwan Semiconductor
Taiwan Semiconductor 1SMA4742 R3G is a 12V Zener diode in a DO-214AC (SMA) surface mount package. It offers 1.25W power dissipation and ±5% voltage tolerance.
Total Stock: 1,155 pcs

1SMA4742 R3G Available from 1 distributor

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1SMA4742 R3G Specifications Quick View

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

1SMA4742 R3G Description

Short technical summary and product information.

The Taiwan Semiconductor 1SMA4742 R3G is a single Zener diode designed for voltage regulation and reference applications. It provides a nominal Zener voltage of 12V with a tolerance of ±5%, ensuring consistent performance in precision circuits.

 

With a power dissipation rating of 1.25W, this diode can handle moderate power levels in surface mount designs. The device features a maximum impedance (Zzt) of 9Ω and a reverse leakage current of 1µA at 9.1V, contributing to stable operation under varying load conditions.

 

The 1SMA4742 R3G is housed in a DO-214AC (SMA) package, supporting surface mount assembly for automated manufacturing. It operates over a junction temperature range of -55°C to 175°C, making it suitable for demanding environments.

1SMA4742 R3G Quick Information

Product Type: Zener Diode
Canonical Name: Taiwan Semiconductor 1SMA4742 R3G Zener Diode, 12V, ±5%, 1.25W, DO-214AC (SMA)
Subcategory: Single Zener Diode

1SMA4742 R3G Compliance

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

1SMA4742 R3G Features

  • 12V Zener voltage with ±5% tolerance.
  • 1.25W power dissipation rating.
  • Low impedance of 9Ω (Zzt).
  • Surface mount DO-214AC (SMA) package.
  • Wide operating temperature range -55°C to 175°C.

1SMA4742 R3G Applications

  • Voltage regulation in power supplies.
  • Overvoltage protection and clamping circuits.
  • Voltage reference in analog circuits.
  • General purpose Zener diode applications.

1SMA4742 R3G FAQs

6 frequently asked questions generated from this part’s specifications.
What is the Zener voltage of the 1SMA4742 R3G?

The Zener voltage is 12V with a tolerance of ±5%.

What is the power dissipation rating of this Zener diode?

The power dissipation is 1.25W.

What package does the 1SMA4742 R3G come in?

It comes in a DO-214AC (SMA) surface mount package.

What is the operating temperature range?

The operating junction temperature range is -55°C to 175°C.

What is the reverse leakage current?

The reverse leakage current is 1µA at 9.1V.

What is the maximum impedance (Zzt) of this diode?

The maximum impedance (Zzt) is 9Ω.

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