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onsemi SZ1SMA5928BT3G
- Part No.:
- SZ1SMA5928BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SZ1SMA5928BT3G.pdf
- Description:
- DIODE ZENER 13V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,544
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Product details
Overview
SZ1SMA5928BT3G from onsemi is a 1.5 W surface-mount Zener diode with nominal zener voltage of 13 V (±5%), maximum zener impedance of 28.8 Ω at 7.0 mA test current, and reverse leakage current ≤0.25 μA at 10.4 V; used for precision voltage regulation and overvoltage protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the SZ1SMA5928BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating above 75°C, low-profile SMA package compatibility, and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown to clamp voltage across load circuits. Its 13 V nominal zener voltage is specified at IZT = 7.0 mA with ±5% tolerance, and it maintains regulation down to IZK = 0.5 mA where dynamic impedance rises to 550 Ω.
Thermal design requires attention to junction-to-lead resistance (50 °C/W) and power derating: full 1.5 W dissipation is only valid at TL = 75°C; above that, linear derating applies at 20 mW/°C. The device supports top-slide or bottom-board mounting due to its flat handling surface and low-profile SMA case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.35–13.65 V @ IZT = 7.0 mA; ensures stable 13 V reference under typical bias conditions |
| Zener Impedance (ZZT) | 28.8 Ω max @ IZT; low dynamic resistance enables tight regulation under varying load currents |
| Power Dissipation (PD) | 1.5 W @ TL = 75°C; defines maximum continuous power before thermal shutdown or degradation |
| Reverse Leakage (IR) | ≤0.25 μA @ VR = 10.4 V; guarantees minimal standby current in high-impedance sensing nodes |
| Thermal Resistance (RJL) | 50 °C/W; determines junction temperature rise per watt dissipated into lead |
| Operating Temp Range | −65°C to +150°C; supports under-hood automotive and industrial environments without derating |
| AEC−Q101 Qualified | Yes; validated for automotive applications requiring PPAP documentation and stress testing compliance |
Pinout & Package
The SZ1SMA5928BT3G uses the SMA (DO-214AC) surface-mount package (Case 403D), featuring a low-profile, void-free molded plastic body with corrosion-resistant, solderable leads and cathode polarity indicated by a molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Band End) | Reverse-biased terminal | Connected to higher-potential node; conducts when voltage exceeds VZ, clamping downstream circuitry |
| Anode | Forward-biased terminal | Connected to lower-potential node (typically ground or return); completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ESD Robustness | Class 3 (>16 kV HBM); protects against electrostatic discharge during handling and PCB assembly |
| Automotive Qualification | AEC−Q101 qualified and PPAP capable; meets automotive reliability and traceability requirements |
| Low-Profile Mounting | Flat handling surface enables accurate pick-and-place placement and supports top-slide or bottom-board mounting |
| Pb-Free Construction | RoHS-compliant, halogen-free package with UL 94 V−0 flammability rating |
| Thermal Performance | 260°C soldering tolerance for 10 seconds; compatible with standard reflow profiles |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping transient spikes on 12 V battery-fed ECUs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage protector in parallel with sensitive microcontroller power inputs. Use Value: Maintains regulated 13 V clamping threshold with <0.25 μA leakage, minimizing quiescent current draw while surviving 100 V transients per ISO 7637-2. | Use Scenario: Providing stable reference voltage for analog front-end amplifiers in factory-floor temperature and pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference source establishing known bias point for op-amp input stages and ADC reference dividers. Use Value: Delivers ±5% VZ tolerance and 28.8 Ω ZZT to ensure signal chain accuracy remains within 0.5% full-scale error across −40°C to +125°C. |
| DC-DC Converter Feedback Network | LED Driver Current Regulation |
Use Scenario: Setting output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener element in secondary-side voltage divider, defining regulation setpoint for TL431 or similar controller. Use Value: Enables stable 13 V reference with 50 °C/W RJL to minimize thermal drift in feedback path, supporting ±1% output accuracy over line/load/temperature. | Use Scenario: Stabilizing current-sense voltage in constant-current LED drivers operating from unregulated 24 V supplies. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed voltage across sense resistor to fix LED current independent of supply variation. Use Value: Achieves <1% current variation using 13 V ±5% VZ and low 28.8 Ω ZZT, ensuring consistent luminance across ambient temperature shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C13LT1G | 300 mW SOT-23 package; 13 V ±5%, ZZT = 30 Ω @ 5 mA; not AEC−Q101 qualified | Lower power rating limits use to low-current bias/reference roles; unsuitable for automotive under-hood deployment | Select when board space is constrained and automotive qualification is unnecessary |
| 1N4742A | 1 W through-hole DO-41; 12 V ±5%, ZZT = 22 Ω @ 21 mA; no AEC−Q101 or Pb-free assurance | Requires manual insertion or wave soldering; lacks surface-mount compatibility and modern ESD robustness | Select for legacy through-hole designs where rework tolerance and cost outweigh SMT benefits |
Compared with BZX84-C13LT1G and 1N4742A, the SZ1SMA5928BT3G provides higher power handling (1.5 W), AEC−Q101 qualification, and superior ESD immunity (>16 kV), making it the preferred choice for new automotive and industrial SMT designs requiring long-term reliability and regulatory compliance.
Availability
SZ1SMA5928BT3G is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor signal conditioning, and DC-DC converter feedback networks requiring stable component supply and AEC−Q101 compliance.
Supply support for SZ1SMA5928BT3G 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 1SMA59xxBT3G/SZ1SMA59xxBT3G series was designed specifically for surface-mount voltage regulation and overvoltage protection in space-constrained, high-reliability systems-especially those targeting automotive AEC−Q101 compliance and industrial environmental resilience.
FAQ
What is the nominal zener voltage and tolerance of SZ1SMA5928BT3G?
The SZ1SMA5928BT3G has a nominal zener voltage of 13 V with a guaranteed tolerance of ±5%, meaning the actual breakdown voltage falls between 12.35 V and 13.65 V when tested at IZT = 7.0 mA and thermal equilibrium. This tolerance is explicitly defined in the Electrical Characteristics table on page 2 of the onsemi datasheet, and applies to all devices in the SZ1SMA59xxBT3G family.
Is SZ1SMA5928BT3G qualified for automotive applications?
Yes, the SZ1SMA5928BT3G is AEC−Q101 qualified and PPAP capable, as confirmed in the Features section of the onsemi datasheet. The "SZ" prefix denotes automotive-grade manufacturing controls, site-specific change management, and extended reliability testing-making SZ1SMA5928BT3G suitable for under-hood and safety-critical vehicle subsystems.
What is the maximum power dissipation and thermal derating behavior of SZ1SMA5928BT3G?
The SZ1SMA5928BT3G delivers 1.5 W maximum DC power dissipation at lead temperature (TL) = 75°C, with linear derating at 20 mW/°C above that point. At ambient temperature (TA) = 25°C, the rated power drops to 0.5 W due to higher thermal resistance to ambient (250 °C/W), as documented in the Maximum Ratings table on page 1 of the datasheet.
Does SZ1SMA5928BT3G have ESD protection, and what level is specified?
Yes, the SZ1SMA5928BT3G features an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as stated in the Features section of the onsemi datasheet. This high-level ESD robustness is built into the device structure and verified during qualification, reducing risk of damage during automated handling and PCB assembly.
What package type and marking code does SZ1SMA5928BT3G use?
The SZ1SMA5928BT3G uses the SMA (DO-214AC) surface-mount package (Case 403D), with cathode identified by a molded polarity band. Its marking code is "828B", as shown in the Electrical Characteristics table on page 2 of the datasheet-where "828" corresponds to the 13 V zener voltage and "B" indicates ±5% tolerance.
SZ1SMA5928BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZ1SMA59xxBT3G
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SZ1SMA5928BT3G FAQ
1.How can I place an order for SZ1SMA5928BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMA5928BT3G 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 SZ1SMA5928BT3G reliable?
The price and inventory of SZ1SMA5928BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMA5928BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMA5928BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMA5928BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMA5928BT3G?
SZ1SMA5928BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMA5928BT3G 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 SZ1SMA5928BT3G?
For technical support, including SZ1SMA5928BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMA5928BT3G requirements.
6.How does Aetrix verify that SZ1SMA5928BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMA5928BT3G 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 SZ1SMA5928BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMA5928BT3G?
All SZ1SMA5928BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMA5928BT3G, 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 SZ1SMA5928BT3G part is unused and in its original packaging.
Return procedure for SZ1SMA5928BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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