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onsemi SZ1SMB5913BT3G
- Part No.:
- SZ1SMB5913BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SZ1SMB5913BT3G.pdf
- Description:
- DIODE ZENER 3.3V 3W SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,147
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Product details
Overview
SZ1SMB5913BT3G from onsemi is a 3.3 V, ±5% tolerance, 3 W surface-mount Zener diode in SMB package, rated for 454 mA maximum DC zener current and 113.6 Ω dynamic impedance at 113.6 mA test current, used for precision voltage regulation and overvoltage protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the SZ1SMB5913BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal resistance (226 °C/W), AEC−Q101 qualification, ESD rating (>16 kV HBM), and SMB package compatibility with automated SMT assembly.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, maintaining stable reverse breakdown at 3.3 V under controlled test current (IZT = 113.6 mA). Its flat handling surface and modified L-bend leads support accurate placement and robust solder joint formation on FR-4 PCBs.
The SZ1SMB5913BT3G features AEC−Q101 qualification and PPAP capability, confirming suitability for automotive applications; its 260°C/10s maximum lead temperature and UL 94 V-0 flammability rating meet IPC/JEDEC reflow and safety requirements for industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, ±5% tolerance - ensures stable regulation within 3.13–3.47 V across operating temperature range. |
| Power Dissipation (PD) | 3.0 W @ TL = 75°C - supports high-energy transient clamping without derating in thermally managed layouts. |
| Zener Test Current (IZT) | 113.6 mA - defines operating point where VZ and ZZT are specified; enables predictable regulation under typical bias conditions. |
| Zener Impedance (ZZT) | 113.6 Ω @ IZT - low dynamic impedance improves regulation accuracy against load or line variations. |
| Reverse Leakage (IR) | 1 μA @ VR = 1 V - minimal off-state current preserves low-power integrity in standby circuits. |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust electrostatic immunity during handling and system integration. |
| Thermal Resistance (RJA) | 226 °C/W - determines junction temperature rise under ambient conditions; requires thermal pad design for sustained 3 W operation. |
Pinout & Package
Package: SMB (Case 403A), surface-mount plastic package with cathode indicated by polarity band; dimensions: 3.56 mm × 4.32 mm × 1.02 mm (L × W × H), Pb-free, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common or ground; establishes reference potential for zener regulation. |
| Cathode | Reverse breakdown terminal / Regulated output node | Connected to regulated rail; maintains 3.3 V above anode when reverse biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per JESD22 standards. |
| Flat handling surface | Enables consistent pick-and-place accuracy and coplanarity control during automated SMT assembly. |
| Modified L-bend leads | Increases solder contact area on bond pads, improving mechanical strength and thermal transfer to PCB copper. |
| Polarity band marking | Unambiguous cathode identification prevents orientation errors during manual or automated placement. |
| Void-free molded plastic case | Ensures hermeticity and long-term moisture resistance in harsh industrial and automotive under-hood environments. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 3.3 V reference for microcontroller I/O and CAN transceiver biasing in BCM power distribution. IC Role / Device Role / Timing Role: Voltage reference and overvoltage clamp protecting downstream logic from battery transients. Use Value: Maintains 3.3 V regulation within ±5% across −40°C to +125°C, enabling reliable MCU operation during cold-crank and load-dump events. |
Use Scenario: Providing stable 3.3 V bias for analog front-end amplifiers and ADC references in pressure/temperature sensors. IC Role / Device Role / Timing Role: Precision shunt regulator establishing clean reference voltage independent of supply ripple. Use Value: Low 113.6 Ω ZZT minimizes output voltage shift under varying sensor load currents, improving measurement accuracy. |
| USB-C Power Delivery Interface | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Clamping VBUS monitor line against ESD and surge events in USB-C PD negotiation circuits. IC Role / Device Role / Timing Role: Transient voltage suppressor with fast response to sub-100 ns ESD pulses. Use Value: >16 kV HBM ESD rating protects PD controller ICs without adding external TVS stages, reducing BOM count. |
Use Scenario: Protecting 24 V digital input channels from field-wiring induced surges and polarity reversal. IC Role / Device Role / Timing Role: Reverse-polarity blocking and overvoltage clamp in optocoupler input stage. Use Value: 3 W steady-state dissipation handles repeated 100 V/10 ms transients per IEC 61000-4-5, extending input stage lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMB5913BT3G | Same electrical specs and SMB package; lacks SZ prefix and AEC−Q101 qualification. | Not validated for automotive use; suitable only for commercial/industrial applications. | Select when AEC−Q101 compliance is not required and cost sensitivity outweighs automotive qualification. |
| BZX84-C3V3 | 325 mW SOT-23 device; 3.3 V ±5%, but lower power and higher ZZT (95 Ω). | Limited to low-current signal-level regulation; cannot sustain 454 mA or handle 3 W surges. | Choose for space-constrained, low-power biasing where thermal management is impractical. |
Compared with SZ1SMB5913BT3G, 1SMB5913BT3G offers identical regulation performance but no automotive qualification, while BZX84-C3V3 trades power handling and surge robustness for footprint reduction-making SZ1SMB5913BT3G the sole choice for AEC−Q101-compliant 3 W 3.3 V regulation.
Availability
SZ1SMB5913BT3G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power delivery protection, and PLC input conditioning requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SZ1SMB5913BT3G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SZ1SMB59xxT3G series is designed specifically for AEC−Q101-compliant voltage regulation and transient suppression in automotive electronics, emphasizing reliability, high-power handling, and robust ESD immunity.
FAQ
What is the Zener voltage tolerance of SZ1SMB5913BT3G?
The SZ1SMB5913BT3G has a nominal Zener voltage of 3.3 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 3.13 V and 3.47 V at the specified test current of 113.6 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet and applies across the full operating temperature range of −65°C to +150°C.
Is SZ1SMB5913BT3G qualified for automotive applications?
Yes, SZ1SMB5913BT3G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes automotive-grade manufacturing controls, site-specific change management, and validation for under-hood and chassis-mounted systems meeting stringent automotive reliability requirements.
What is the maximum DC Zener current for SZ1SMB5913BT3G?
The maximum DC Zener current (IZM) for SZ1SMB5913BT3G is 454 mA, as listed in the Electrical Characteristics table on page 3 of the datasheet. This value corresponds to the current at which the device dissipates its rated 3.0 W at TL = 75°C and defines the upper limit for continuous reverse-bias operation without exceeding thermal limits.
Does SZ1SMB5913BT3G have ESD protection?
Yes, SZ1SMB5913BT3G features an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as documented in the Features section of the onsemi datasheet. This level of ESD immunity is built into the device structure and does not require external components, making it suitable for direct integration into ESD-prone interfaces like USB-C or sensor inputs.
What is the thermal resistance from junction-to-ambient for SZ1SMB5913BT3G?
The thermal resistance from junction-to-ambient (RJA) for SZ1SMB5913BT3G is 226 °C/W, measured on an FR-4 board using the recommended footprint. This value appears in the Maximum Ratings table and determines how much the junction temperature rises above ambient at a given power dissipation-critical for thermal design in enclosed or high-temperature environments.
SZ1SMB5913BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SZ1SMB5913BT3G FAQ
1.How can I place an order for SZ1SMB5913BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMB5913BT3G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SZ1SMB5913BT3G reliable?
The price and inventory of SZ1SMB5913BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMB5913BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMB5913BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMB5913BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMB5913BT3G?
SZ1SMB5913BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMB5913BT3G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SZ1SMB5913BT3G?
For technical support, including SZ1SMB5913BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMB5913BT3G requirements.
6.How does Aetrix verify that SZ1SMB5913BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMB5913BT3G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SZ1SMB5913BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMB5913BT3G?
All SZ1SMB5913BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMB5913BT3G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SZ1SMB5913BT3G part is unused and in its original packaging.
Return procedure for SZ1SMB5913BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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