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| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
5,000 pcs
|
5000 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
| Category | |
| Manufacturer Name | |
| AEC Qualified | |
| AEC-Q101 Qualified | |
| Automotive Grade | |
| Current | |
| ESD Rating | |
| Flammability Rating | |
| Impedance (Max) (Zzt) | |
| Lead Finish | |
| Lead Style | |
| Maximum Soldering Temperature | |
| Mounting Type | |
| Operating Temperature | |
| Packaging Type | |
| Power | |
| Power Dissipation (Maximum @ TA=25 °C, FR -4 board) | |
| Power Dissipation (Maximum @ TL=75 °C, zero lead length) | |
| Standard Package Quantity | |
| Storage Temperature | |
| Storage Temperature Range | |
| Supplier Device Package | |
| Tape & Reel | |
| Thermal Resistance (Maximum @ Junction to lead) | |
| Thermal Resistance (Maximum @ Junction-to-Ambient, FR -4 board) | |
| Tolerance | |
| Voltage | |
| Zener Voltage |
The SZ1SMB5939BT3G is a 39V, 3W Zener diode from ON Semiconductor, part of the 1SMB59xxBT3G/SZ1SMB59xxT3G series. This automotive-grade (AEC-Q101 qualified) device offers a nominal zener voltage of 39V with ±5% tolerance. It is designed for surface mount applications and provides a maximum power dissipation of 3W at a lead temperature of 75°C (zero lead length) and 550mW at ambient temperature 25°C on FR-4 board.
Key electrical characteristics include a low reverse leakage current of 1µA at 29.7V, a forward voltage of 1.5V max at 200mA, and a zener impedance of 45Ω. The device features an ESD rating of Class 3 (>16kV) per Human Body Model, enhancing robustness in handling. The operating and storage temperature range is -65°C to 150°C.
The SZ1SMB5939BT3G is housed in a DO-214AA (SMB) surface mount package, with a modified L-bend lead design for improved solder contact area. It is provided in tape and reel packaging (2500 units per reel) for automated assembly. The device is Pb-free and has a UL 94 V-0 flammability rating. Its corrosion-resistant leads and 260°C soldering temperature capability make it suitable for standard reflow processes.
Applications include automotive electronics, voltage regulation, overvoltage protection, clamping circuits, and general-purpose power management in space-constrained designs.
| Qty | Low | High |
|---|---|---|
| 1+ | $1.14 | $1.14 |
| 10+ | $0.71 | $0.71 |
| 100+ | $0.47 | $0.47 |
| 500+ | $0.36 | $0.36 |
| 1,000+ | $0.33 | $0.33 |
| 2,500+ | $0.27 | $0.27 |
| 5,000+ | $0.25 | $0.25 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The nominal zener voltage is 39V with a tolerance of ±5%.
Maximum power dissipation is 3W at lead temperature 75°C (zero lead length) and 550mW at ambient temperature 25°C on FR-4 board.
The maximum forward voltage is 1.5V at a forward current of 200mA.
The maximum reverse leakage current is 1µA at a reverse voltage of 29.7V.
Yes, the SZ1SMB5939BT3G is AEC-Q101 qualified for automotive applications.
ESD rating is Class 3 (>16kV) per Human Body Model.
It is available in a DO-214AA (SMB) surface mount package, supplied in tape and reel (2500 pieces per reel).