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1SMA5939BT3G Zener diode with nominal voltage 39V, ±5% tolerance, 1.5W power dissipation in a surface mount SMA package.
Mfr Part #:

1SMA5939BT3G

Available from 3 distributors
Mfr Name: On Semiconductor
On Semiconductor
Zener diode with nominal voltage 39V, ±5% tolerance, 1.5W power dissipation in a surface mount SMA package.
Total Stock: 34,048 pcs

1SMA5939BT3G Available from 3 distributors

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1124 pcs On Request 1 On Request On Request On Request On Request On Request

1SMA5939BT3G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Current
Current - Reverse Leakage @ Vr
Impedance (Max) (Zzt)
Industrial Grade
Lead Spacing
Lead Style
Medical Grade
Military Grade
Mounting Type
Operating Temperature
Package / Case
Power
Power - Max
SVHC Present
Storage Temperature
Supplier Device Package
Tape & Reel
Tolerance
Voltage
Voltage - Forward (Vf) (Max) @ If
Voltage - Zener (Nom) (Vz)

1SMA5939BT3G Description

Short technical summary and product information.

The 1SMA5939BT3G is a 39V Zener diode from the 1SMA59xxBT3G series manufactured by onsemi. It offers a nominal Zener voltage of 39V with ±5% tolerance, a maximum power dissipation of 1.5W, and a typical impedance of 45Ω. Reverse leakage current is specified as 500 nA at 29.7V, and forward voltage is 1.5V at 200mA.

 

The device is housed in a DO-214AC (SMA) surface mount package, designed for automatic placement and reflow soldering. It operates over a junction temperature range of -65°C to 150°C and is Pb-Free. The series also features ESD rating of Class 3 (>16 kV) per Human Body Model, making it robust for various applications.

 

This Zener diode is suitable for voltage regulation, overvoltage protection, and general reference applications in power management circuits. It is RoHS3 compliant and has an MSL rating of 1 (Unlimited). While compliance data is noted, verification from manufacturer documentation is recommended for critical designs.

1SMA5939BT3G Quick Information

Product Type: Zener Diode
Series: 1SMA59xxBT3G Series
Canonical Name: Zener Diode, 39V, ±5%, 1.5W, Surface Mount, DO-214AC (SMA)
Subcategory: Single Zener Diode

1SMA5939BT3G Compliance

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

1SMA5939BT3G Features

  • Zener voltage 39V with ±5% tolerance.
  • Power dissipation rated up to 1.5W.
  • Surface mount package DO-214AC (SMA).
  • Low leakage current 500 nA at 29.7 V.
  • Wide operating temperature -65°C to 150°C.

1SMA5939BT3G Applications

  • Used for voltage regulation in power supplies.
  • Provides overvoltage protection in circuits.
  • Suitable for general purpose voltage reference.
  • Ideal for surface mount designs with SMA package.

1SMA5939BT3G FAQs

7 frequently asked questions generated from this part’s specifications.
What is the Zener voltage of 1SMA5939BT3G?

The nominal Zener voltage is 39V with a tolerance of ±5%.

What is the maximum power dissipation?

The maximum power dissipation is 1.5W (at lead temperature 75°C).

What is the forward voltage?

The maximum forward voltage is 1.5V at 200mA forward current.

What is the package type?

The package is DO-214AC (SMA), suitable for surface mount mounting.

What is the operating temperature range?

The operating temperature range is -65°C to 150°C.

What is the reverse leakage current?

The reverse leakage current is 500 nA at 29.7V reverse voltage.

Is this component RoHS compliant?

The component is indicated as RoHS3 Compliant, though this data is unverified and should be confirmed with the manufacturer.

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