Overview
The 1SMB5939BT3G is a 3.0 W Zener diode produced by onsemi, designed for general purpose voltage regulation applications. This device is part of the 1SMB59 series, which offers a wide range of Zener voltages from 3.3 V to 200 V. The 1SMB5939BT3G specifically has a Zener voltage range of 37.05 V to 40.95 V, making it suitable for various voltage regulation needs. It features an ESD rating of Class 3 (>16 kV) per Human Body Model, ensuring robust protection against electrostatic discharge. The device is packaged in a void-free, transfer-molded plastic SMB (DO-214AA) case, which is Pb-free and AEC-Q101 qualified, making it suitable for automotive and other demanding applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Zener Voltage (VZ) | 37.05 - 40.95 | V |
| Maximum Power Dissipation (Pmax) | 3 | W |
| ESD Rating | Class 3 (>16 kV) | - |
| Maximum Zener Impedance (ZZT) | 9.6 | Ω |
| Reverse Leakage Current (IR) | 1 μA | - |
| Forward Voltage (VF) | 1.5 V Max. @ IF = 200 mA(dc) | V |
| Maximum DC Zener Current (IZM) | 45 mA | - |
| Package Type | SMB (DO-214AA) | - |
| Case Temperature for Soldering | 260°C for 10 seconds | - |
| Flammability Rating | UL 94 V-0 | - |
Key Features
- Zener Voltage Range: 37.05 V to 40.95 V
- Maximum Power Dissipation: 3 W
- ESD Rating: Class 3 (>16 kV) per Human Body Model
- Flat Handling Surface for Accurate Placement
- Package Design for Top Side or Bottom Circuit Board Mounting
- AEC-Q101 Qualified and PPAP Capable
- SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
- Pb-Free Package
- Modified L-Bend Leads for More Contact Area to Bond Pads
- Cathode Indicated by Polarity Band
Applications
- Voltage Regulation
- Waveform Clipping
- MOSFET Gate Protection
- General Purpose Voltage Regulation in Various Electronic Devices
- Automotive and Industrial Applications Requiring High Reliability and Robust ESD Protection
Q & A
- What is the Zener voltage range of the 1SMB5939BT3G?
The Zener voltage range of the 1SMB5939BT3G is from 37.05 V to 40.95 V. - What is the maximum power dissipation of the 1SMB5939BT3G?
The maximum power dissipation is 3 W. - What is the ESD rating of the 1SMB5939BT3G?
The ESD rating is Class 3 (>16 kV) per Human Body Model. - What package type is used for the 1SMB5939BT3G?
The package type is SMB (DO-214AA). - Is the 1SMB5939BT3G Pb-free?
Yes, the 1SMB5939BT3G is Pb-free. - What is the maximum case temperature for soldering?
The maximum case temperature for soldering is 260°C for 10 seconds. - What are some common applications of the 1SMB5939BT3G?
Common applications include voltage regulation, waveform clipping, MOSFET gate protection, and general purpose voltage regulation in various electronic devices. - Is the 1SMB5939BT3G suitable for automotive applications?
Yes, it is AEC-Q101 qualified and PPAP capable, making it suitable for automotive and other demanding applications. - How is the cathode indicated on the 1SMB5939BT3G?
The cathode is indicated by a polarity band. - What is the flammability rating of the 1SMB5939BT3G?
The flammability rating is UL 94 V-0.
