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onsemi SZ1SMB5926BT3G
- Part No.:
- SZ1SMB5926BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SZ1SMB5926BT3G.pdf
- Description:
- DIODE ZENER 11V 3W SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,150
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Product details
Overview
SZ1SMB5926BT3G from onsemi is a 3 W surface-mount Zener diode with nominal zener voltage of 11 V, ±5% tolerance, 34.1 Ω dynamic impedance at 5.5 mA test current, and 0.25 μA leakage current at 8.4 V reverse bias-used for precision voltage regulation and overvoltage protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the SZ1SMB5926BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage stability across temperature, low leakage at rated VR, thermal derating above 75°C, and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, designed for DC stabilization in low-power supply rails and transient clamping circuits. Its 3 W steady-state dissipation at TL = 75°C and 550 mW at TA = 25°C enables robust operation in thermally constrained PCB layouts.
The SMB package (Case 403A) supports top- or bottom-side mounting, features a modified L-bend lead for enhanced pad adhesion, and meets UL 94 V−0 flammability rating. It is Pb−free, AEC−Q101 qualified, and rated for −65°C to +150°C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.45–11.55 V (±5% tolerance at IZT = 5.5 mA; ensures stable reference within 0.55 V window under nominal bias) |
| Max Power Dissipation | 3.0 W at TL = 75°C (derates linearly to zero at 150°C; defines maximum continuous thermal load at lead temperature) |
| Zener Impedance (ZZT) | 34.1 Ω at IZT = 5.5 mA (low dynamic resistance maintains voltage regulation accuracy under varying load currents) |
| Leakage Current (IR) | 0.25 μA at VR = 8.4 V (ultra-low reverse conduction minimizes standby power loss in battery-backed systems) |
| Thermal Resistance (RJL) | 40 °C/W junction-to-lead (enables direct thermal path to PCB copper; critical for sustained 3 W operation without heatsink) |
| ESD Rating | Class 3 (>16 kV HBM) (robust handling during automated assembly and field operation without external protection) |
Pinout & Package
Package: SMB (Case 403A), surface-mount plastic package with cathode polarity band, void-free transfer-molded construction, UL 94 V−0 rated, Pb−free, and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Zener reverse bias return | Connected to lower-potential node in regulation circuit; forms reference ground return path during breakdown |
| Cathode | Zener breakdown terminal / Voltage reference output | Connected to regulated rail; delivers stable 11 V output when reverse biased above VZ; marked by polarity band |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualification | Validated for automotive applications including engine control modules and body electronics requiring extended temperature and lifetime reliability |
| Flat handling surface | Enables high-accuracy placement during pick-and-place assembly, reducing tombstoning and misalignment on fine-pitch PCBs |
| Modified L-bend leads | Increases solder joint contact area and mechanical strength, improving resistance to thermal cycling and board flex stress |
| Top/bottom mounting flexibility | Allows layout optimization in space-constrained designs-e.g., stacked boards or shielded enclosures where component height matters |
Applications
| Automotive Sensor Supply Regulation | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Stabilizing 12 V rail powering analog pressure/temperature sensors in engine bay environments. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream op-amps and ADC front-ends. Use Value: Maintains 11 V reference within ±5% across −40°C to +125°C ambient, preventing sensor signal drift and enabling AEC−Q101-compliant system certification. |
Use Scenario: Clamping induced transients on 24 V digital input channels of programmable logic controllers. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting surge energy before it reaches isolation barriers or microcontroller GPIOs. Use Value: Withstands 100 V non-repetitive surges per Figure 2 and limits clamped voltage to ≤11.6 V, preserving 3.3 V logic-level interface integrity. |
| Medical Instrument Reference Bias | Telecom Power Sequencing |
|
Use Scenario: Providing stable bias voltage for precision instrumentation amplifiers in portable ECG monitors. IC Role / Device Role / Timing Role: Low-leakage (0.25 μA) voltage reference ensuring minimal offset error in high-impedance biopotential signal paths. Use Value: Enables sub-μV input offset stability over time and temperature, meeting IEC 60601-1 leakage current safety thresholds. |
Use Scenario: Enabling controlled power-up sequencing of multi-rail telecom ASICs via voltage-dependent enable signals. IC Role / Device Role / Timing Role: Threshold detector triggering supervisor ICs when 12 V rail crosses 11 V during ramp-up. Use Value: Tight 10.45–11.55 V tolerance ensures deterministic timing margin between rail stabilization and ASIC initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMB5926BT3G | Same electrical specs and SMB package; lacks SZ prefix and AEC−Q101 qualification documentation | Not certified for automotive use; suitable for commercial/industrial applications only | Select when AEC−Q101 compliance is not required and cost sensitivity outweighs qualification traceability |
| BZX84-C11LT1G | Lower power (350 mW), SOT-23 package, 10–12 V range, 20 Ω ZZT at 5 mA | Used in ultra-low-power portable devices; insufficient for 3 W continuous dissipation | Choose for space-constrained, low-current biasing where thermal budget prohibits SMB footprint |
Compared with 1SMB5926BT3G and BZX84-C11LT1G, SZ1SMB5926BT3G uniquely combines automotive qualification, 3 W thermal capability, and tight 11 V regulation-making it irreplaceable in high-reliability 12 V rail conditioning where both power handling and certification matter.
Availability
SZ1SMB5926BT3G is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, medical diagnostics equipment, and telecom power management systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZ1SMB5926BT3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
SZ1SMB5926BT3G belongs to the SZ1SMB59xxT3G series-a family of AEC−Q101-qualified Zener regulators engineered specifically for automotive power rail stabilization and industrial overvoltage protection where reliability under thermal and ESD stress is non-negotiable.
FAQ
What is the zener voltage tolerance of SZ1SMB5926BT3G?
The SZ1SMB5926BT3G has a nominal zener voltage of 11 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 10.45 V and 11.55 V when tested at IZT = 5.5 mA and TL = 30°C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet.
Is SZ1SMB5926BT3G qualified for automotive applications?
Yes, SZ1SMB5926BT3G is explicitly AEC−Q101 qualified and PPAP capable, as stated in the Features section of the datasheet. The "SZ" prefix denotes automotive-grade manufacturing controls and site-specific change management-making SZ1SMB5926BT3G suitable for engine control units, ADAS sensors, and other mission-critical vehicle subsystems.
What is the maximum power dissipation of SZ1SMB5926BT3G at room temperature?
SZ1SMB5926BT3G dissipates up to 550 mW at TA = 25°C, with linear derating of 4.4 mW/°C above that temperature. At TL = 75°C, its maximum steady-state power rises to 3.0 W-leveraging the low RJL = 40 °C/W to transfer heat efficiently from junction to PCB copper.
How does the leakage current of SZ1SMB5926BT3G compare to similar 11 V Zeners?
SZ1SMB5926BT3G specifies only 0.25 μA maximum leakage current at VR = 8.4 V, which is significantly lower than many legacy 11 V Zeners (e.g., 1 μA typical). This ultra-low leakage reduces standby power loss in battery-powered systems and improves accuracy in high-impedance reference networks where leakage-induced error must be minimized.
What package type does SZ1SMB5926BT3G use, and what are its key mechanical features?
SZ1SMB5926BT3G uses the SMB package (Case 403A), a surface-mount plastic case with dimensions 4.06 mm × 2.74 mm × 2.26 mm. Key mechanical features include a flat handling surface for precise placement, modified L-bend leads for enhanced solder joint reliability, cathode polarity band marking, and UL 94 V−0 flammability rating-ensuring robust manufacturability and safety compliance.
SZ1SMB5926BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 5.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 8.4 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
SZ1SMB5926BT3G FAQ
1.How can I place an order for SZ1SMB5926BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMB5926BT3G 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 SZ1SMB5926BT3G reliable?
The price and inventory of SZ1SMB5926BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMB5926BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMB5926BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMB5926BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMB5926BT3G?
SZ1SMB5926BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMB5926BT3G 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 SZ1SMB5926BT3G?
For technical support, including SZ1SMB5926BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMB5926BT3G requirements.
6.How does Aetrix verify that SZ1SMB5926BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMB5926BT3G 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 SZ1SMB5926BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMB5926BT3G?
All SZ1SMB5926BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMB5926BT3G, 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 SZ1SMB5926BT3G part is unused and in its original packaging.
Return procedure for SZ1SMB5926BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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