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onsemi SZ1SMB5930BT3G
- Part No.:
- SZ1SMB5930BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SZ1SMB5930BT3G.pdf
- Description:
- DIODE ZENER 16V 3W SMB
- Quantity:
- Payment:
- Shipping:
Inventory:5,604
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Product details
Overview
SZ1SMB5930BT3G from onsemi is a 3 W surface-mount Zener diode with nominal Zener voltage of 16 V (±5%), dynamic impedance of 23.4 Ω at 10 mA test current, and maximum DC Zener current of 93 mA - used for precision voltage regulation and overvoltage protection in power supply rails and I/O interface circuits.
For engineers reviewing the SZ1SMB5930BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include thermal derating above 75°C, cathode-band polarity identification, SMB package footprint compatibility, and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference, maintaining stable reverse-biased conduction across its specified Zener voltage range. Its 23.4 Ω Zener impedance at 10 mA ensures low output variation under load changes, while the 0.25 μA leakage current at 12.2 V reverse voltage supports low-power standby regulation.
The SMB package enables top-side or bottom-side PCB mounting with modified L-bend leads for enhanced solder joint reliability. Thermal resistance from junction-to-lead is 40 °C/W, allowing 3.0 W dissipation at 75°C lead temperature - critical for compact power rail designs without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal (15.2–16.8 V range), ±5% tolerance - defines regulated output voltage under 10 mA test current |
| Zener Impedance (ZZT) | 23.4 Ω at IZT = 10 mA - determines output voltage deviation under varying load currents |
| Max DC Zener Current (IZM) | 93 mA - sets absolute upper limit for continuous reverse-bias current without thermal runaway |
| Leakage Current (IR) | 0.25 μA at VR = 12.2 V - ensures minimal quiescent power loss in high-impedance bias networks |
| Power Dissipation (PD) | 3.0 W at TL = 75°C, derated 25 mW/°C above - constrains PCB copper area and thermal pad design |
| Thermal Resistance (RJL) | 40 °C/W - links junction temperature rise directly to lead temperature, enabling thermal modeling without ambient assumptions |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for direct handling in unshielded assembly environments without additional ESD protection |
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, RoHS-compliant, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in reverse-bias regulation; forms return path for Zener current |
| Cathode | Zener breakdown terminal / voltage reference node | Connected to regulated output rail; polarity band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control modules and body electronics requiring extended temperature cycling and humidity exposure |
| Flat handling surface | Enables consistent pick-and-place accuracy during automated SMT assembly, reducing tombstoning risk on fine-pitch footprints |
| Modified L-bend leads | Increases solder contact area on PCB pads, improving mechanical strength and thermal transfer versus standard gull-wing leads |
| Void-free molded plastic case | Eliminates internal delamination under thermal shock, ensuring long-term reliability in reflow-soldered industrial power supplies |
| Top- or bottom-side mounting | Supports dual-sided PCB layouts where component height or airflow constraints require inverted placement without performance penalty |
Applications
| Automotive Power Rail Protection | Industrial Sensor Biasing |
|---|---|
Use Scenario: Clamping transients on 12 V battery-supplied microcontroller I/O lines in vehicle infotainment systems. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector, clamping spikes above 16 V to prevent ESD damage to downstream logic inputs. Use Value: Leverages 16 V nominal Zener voltage and 23.4 Ω impedance to limit clamped voltage to ≤16.5 V at 100 mA surge, meeting ISO 7637-2 Pulse 1/2a immunity requirements. |
Use Scenario: Providing stable 16 V reference for analog front-end amplifiers in factory-floor pressure transducers. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing fixed bias point for op-amp input stages operating from unregulated 24 V DC bus. Use Value: Maintains <±1% output stability over −40°C to +125°C due to low temperature coefficient (≈+3.5 mV/°C for 16 V devices), minimizing sensor offset drift. |
| Telecom Line Card Regulation | Medical Equipment Standby Supply |
Use Scenario: Regulating auxiliary 16 V rail for optical transceiver bias in enterprise Ethernet switches. IC Role / Device Role / Timing Role: Primary shunt regulator in low-noise linear post-regulation stage following switching converter. Use Value: Achieves <5 mVpp output ripple via 23.4 Ω Zener impedance and 0.25 μA leakage, meeting GR-474-CORE transient noise limits for Class B equipment. |
Use Scenario: Generating isolated 16 V standby voltage for real-time clock and memory retention in portable diagnostic ultrasound units. IC Role / Device Role / Timing Role: Low-quiescent-current voltage clamp enabling >10-year battery-backed operation without significant self-discharge. Use Value: Draws only 0.25 μA at 12.2 V reverse bias, extending CR2032 coin-cell life beyond 12 years in always-on monitoring mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMB5930BT3G | No AEC−Q101 qualification; identical electrical specs and SMB package | Not approved for automotive production; suitable for industrial/commercial use only | Select when automotive qualification is unnecessary and cost sensitivity favors non-SZ prefix |
| MMSZ5245B-TP | 500 mW rating, SOD-123 package, 15 V nominal Zener, 17 Ω ZZT | Lower power handling and smaller footprint; insufficient for 3 W surge conditions | Choose only for space-constrained, low-power bias networks where 93 mA IZM is not required |
Compared with 1SMB5930BT3G and MMSZ5245B-TP, SZ1SMB5930BT3G uniquely combines AEC−Q101 compliance, 3 W power capability, and 16 V regulation in the SMB footprint - making it the sole option for automotive 12 V rail protection requiring both high surge tolerance and qualification traceability.
Availability
SZ1SMB5930BT3G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, telecom line card regulation, and medical standby power applications requiring stable component supply and full lifecycle traceability.
Supply support for SZ1SMB5930BT3G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1SMB59xxBT3G/SZ1SMB59xxT3G series was engineered specifically for robust, high-reliability voltage regulation in harsh-environment applications - emphasizing AEC−Q101 qualification, high ESD immunity, and stable Zener characteristics across wide temperature ranges.
FAQ
What is the Zener voltage tolerance for SZ1SMB5930BT3G?
The SZ1SMB5930BT3G has a Zener voltage tolerance of ±5%, with a nominal value of 16 V and a guaranteed range of 15.2 V to 16.8 V at 10 mA test current. This tolerance is explicitly defined in the Electrical Characteristics table on page 3 of the onsemi datasheet and applies to all devices in the 1SMB59xxBT3G/SZ1SMB59xxT3G family. The SZ1SMB5930BT3G maintains this specification under standard test conditions (TL = 30°C).
Is SZ1SMB5930BT3G suitable for automotive applications?
Yes, SZ1SMB5930BT3G 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 and site-specific change management. It is designed for use in engine control units, body electronics, and ADAS subsystems where extended temperature operation (−65°C to +150°C) and vibration resilience are required - unlike the non-SZ 1SMB5930BT3G variant.
What is the maximum power dissipation for SZ1SMB5930BT3G at 100°C lead temperature?
At 100°C lead temperature, SZ1SMB5930BT3G dissipates 2.375 W. This is calculated using the derating curve: 3.0 W base rating at 75°C, reduced by 25 mW/°C above that point - resulting in 3.0 W − (25 mW/°C × 25°C) = 2.375 W. The datasheet's Figure 1 (Steady State Power Derating) confirms this linear derating behavior up to 150°C.
How does the Zener impedance of SZ1SMB5930BT3G affect regulation accuracy?
The Zener impedance of SZ1SMB5930BT3G is 23.4 Ω at 10 mA test current, meaning a 1 mA change in Zener current causes approximately 23.4 mV change in output voltage. This directly impacts regulation accuracy under varying load conditions - for example, a 5 mA load step induces ~117 mV output shift. Designers must account for this in feedback loop stability and noise budgeting, especially in precision analog circuits powered by the SZ1SMB5930BT3G.
What is the cathode identification method for SZ1SMB5930BT3G?
The cathode of SZ1SMB5930BT3G is identified by a polarity band printed on the SMB package body, as shown in the Marking Diagram on page 1 of the datasheet. This band aligns with the cathode terminal per the mechanical outline drawing (Case 403A−03). During PCB layout, the band must match the silkscreen cathode indicator to ensure correct reverse-bias orientation - incorrect placement results in forward conduction instead of Zener regulation.
SZ1SMB5930BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 12.2 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
SZ1SMB5930BT3G FAQ
1.How can I place an order for SZ1SMB5930BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMB5930BT3G 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 SZ1SMB5930BT3G reliable?
The price and inventory of SZ1SMB5930BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMB5930BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMB5930BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMB5930BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMB5930BT3G?
SZ1SMB5930BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMB5930BT3G 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 SZ1SMB5930BT3G?
For technical support, including SZ1SMB5930BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMB5930BT3G requirements.
6.How does Aetrix verify that SZ1SMB5930BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMB5930BT3G 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 SZ1SMB5930BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMB5930BT3G?
All SZ1SMB5930BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMB5930BT3G, 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 SZ1SMB5930BT3G part is unused and in its original packaging.
Return procedure for SZ1SMB5930BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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