Discover Nexperia’s extensive portfolio of diodes, bipolar transistors, ESD protection devices, MOSFETs, GaN FETs, IGBTs, and analog & logic ICs. Our components power virtually every electronic design worldwide - from automotive and industrial to mobile and consumer applications.
Our products find applications across various industries, from automotive and industrial to power, computing, consumer, mobile, and wearables. With a commitment to innovation and sustainability, our components set benchmarks in efficiency, empowering our global customer base to develop energy-efficient and cutting-edge solutions.
Try out our devices and their performance with our comprehensive range of evaluation boards. Gain a deeper understanding of how our products can benefit your application, whether it's optimizing for efficiency, robustness, or reliability. You can find Application focus, Package focus, and different Nexperia Product focus boards here.
Register once, drag and drop ECAD models into your CAD tool and speed up your design.
Click here for more informationHigh-voltage switching diode
High-voltage switching diode, fabricated in planar technology, and encapsulated in a SOD523 (SC-79) ultra small Surface-Mounted Device (SMD) plastic package.
High switching speed: trr ≤ 50 ns
High reverse voltage: VR ≤ 300 V
Repetitive peak forward current: IFRM ≤ 1 A
Ultra small SMD plastic package
High-speed switching
High-voltage switching
| Type number | Package version | Package name | Size (mm) | VR [max] (V) | IFSM [max] (A) | VF [max] (mV) | IR [max] (nA) | IFRM (mA) | Configuration | trr [max] (ns) | IF [max] (mA) | Cd [max] (pF) | Automotive qualified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BAS521 | SOD523 | SC-79 | 1.2 x 0.8 x 0.6 | 300 | 4.5 | 1100@IF=100mA | 150@VR=250V | 1000 | single | 50 | 250 | 5 | N |
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| BAS521 | BAS521,115 (934057766115) |
Active | L4 |
SC-79 (SOD523) |
SOD523 |
REFLOW_BG-BD-1
|
SOD523_115 |
| BAS521,135 (934057766135) |
Active | L4 | SOD523_135 | ||||
| BAS521,315 (934057766315) |
Active | L4 | SOD523_315 |
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| BAS521 | BAS521,115 | BAS521 |
|
|
| BAS521 | BAS521,135 | BAS521 |
|
|
| BAS521 | BAS521,315 | BAS521 |
|
|
| File name | Title | Type | Date |
|---|---|---|---|
| BAS521 | High-voltage switching diode | Data sheet | 2023-07-03 |
| AN90063 | Questions about package outline drawings | Application note | 2025-10-22 |
| Nexperia_document_brochure_ESD-Protection-Applications_022017 | ESD Protection Application guide | Brochure | 2018-12-21 |
| SOD523 | 3D model for products with SOD523 package | Design support | 2019-01-22 |
| Nexperia_package_poster | Nexperia package poster | Leaflet | 2020-05-15 |
| SOD523_mk | plastic, surface-mounted package; 2 leads; 1.2 mm x 0.8 mm x 0.6 mm body | Marcom graphics | 2017-01-28 |
| SOD523 | plastic, surface-mounted package; 2 leads; 1.2 mm x 0.8 mm x 0.6 mm body | Package information | 2022-05-27 |
| SOD523_115 | Reel pack for SMD, 7''; Q1/T1-Q2/T3 product orientation | Packing information | 2021-02-05 |
| SOD523_135 | Reel pack for SMD, 11''; Q1/T1-Q2/T3 product orientation | Packing information | 2021-02-05 |
| SOD523_315 | Reel pack, SMD, 7"; Q1/T1 standard product orientation; Orderable part number ending ,315 or YL; Ordering code (12NC) ending 315 | Packing information | 2020-04-21 |
| BAS521_Nexperia_Product_Reliability | BAS521 Nexperia Product Reliability | Quality document | 2025-05-28 |
| REFLOW_BG-BD-1 | Reflow soldering profile | Reflow soldering | 2021-04-06 |
| BAS521 | BAS521 SPICE model | SPICE model | 2025-10-11 |
If you are in need of design/technical support, let us know and fill in the answer form we'll get back to you shortly.
The Nexperia Longevity Program is aimed to provide our customers information from time to time about the expected time that our products can be ordered. The NLP is reviewed and updated regularly by our Executive Management Team. View our longevity program here.
| Type number | Orderable part number | Ordering code (12NC) | Status | Packing | Packing Quantity | Buy online |
|---|---|---|---|---|---|---|
| BAS521 | BAS521,115 | 934057766115 | Active | SOD523_115 | 3,000 |
|
| BAS521 | BAS521,135 | 934057766135 | Active | SOD523_135 | 10,000 |
|
| BAS521 | BAS521,315 | 934057766315 | Active | SOD523_315 | 8,000 |
|
As a Nexperia customer you can order samples via our sales organization.
If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples. Check out the list of official distributors.
The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.
