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onsemi SZ1SMA5925BT3G
- Part No.:
- SZ1SMA5925BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SZ1SMA5925BT3G.pdf
- Description:
- DIODE ZENER 10V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:7,193
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Product details
Overview
SZ1SMA5925BT3G from onsemi is a 1.5 W surface-mount Zener diode with nominal zener voltage of 10 V, ±5% tolerance, 37.5 Ω dynamic impedance at 4.5 mA test current, and 0.25 μA leakage current at 8.0 V reverse voltage-used for precision voltage regulation in automotive power rails and industrial sensor biasing.
For engineers reviewing the SZ1SMA5925BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include thermal resistance (50 °C/W junction-to-lead), AEC-Q101 qualification, low-profile SMA package compatibility, and 16 kV HBM ESD rating for harsh-environment designs.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at its specified VZ when forward-biased current falls below IZK. It maintains regulation across −65 °C to +150 °C with temperature coefficient optimized for 10 V nominal devices.
Its 1.5 W power dissipation at TL = 75 °C and 50 °C/W junction-to-lead thermal resistance enable stable operation under PCB-conducted heat, while the 0.25 μA IR @ VR = 8.0 V ensures minimal standby current draw in battery-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5 V min / 10.0 V nom / 10.5 V max - defines regulated output voltage window under IZT = 4.5 mA |
| Zener Impedance (ZZT) | 37.5 Ω max @ IZT = 4.5 mA - determines voltage deviation under load transients |
| Power Dissipation (PD) | 1.5 W @ TL = 75 °C - sets maximum continuous thermal load on PCB copper pad |
| Leakage Current (IR) | 0.25 μA max @ VR = 8.0 V - ensures negligible quiescent current in off-state circuits |
| Thermal Resistance (RJL) | 50 °C/W - links junction temperature rise directly to lead temperature in surface-mount layout |
| ESD Rating | Class 3 (>16 kV) HBM - supports robust handling in automated SMT lines without special ESD controls |
| Operating Temp Range | −65 °C to +150 °C - validated for under-hood automotive and industrial control environments |
Pinout & Package
Package: SMA (DO-214AC), case 403D, Pb-free, low-profile surface-mount plastic package with flat handling surface and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | Reverse-bias anode connection point | Connected to higher-potential rail to enable Zener conduction during overvoltage events |
| Anode | Reverse-bias cathode return path | Typically tied to system ground or lower-voltage reference to complete regulation loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements |
| 16 kV HBM ESD rating | Eliminates need for external ESD protection in board-level assembly and field service |
| Flat handling surface | Enables accurate pick-and-place placement with standard vision-guided SMT equipment |
| Top-slide or bottom-mount package | Supports dual-side reflow or selective soldering in high-density PCB layouts |
| UL 94 V-0 flammability | Meets safety compliance for enclosed industrial enclosures and EV charging modules |
Applications
| Automotive Power Rail Clamp | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Clamping 12 V battery-supplied microcontroller I/O lines against load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator to divert surge current away from sensitive logic inputs. Use Value: 10 V nominal breakdown prevents damage to 3.3 V/5 V logic while surviving 1.5 W pulse energy per ISO 7637-2 Pulse 5a. | Use Scenario: Providing stable 10 V reference for 16-bit ADC biasing in factory-floor pressure transducers. IC Role / Device Role / Timing Role: Precision voltage reference source with <±5% tolerance and low tempco for analog front-end calibration. Use Value: 37.5 Ω ZZT ensures <10 mV shift under 1 mA load variation, enabling <0.1% measurement accuracy. |
| LED Driver Overvoltage Protection | Programmable Logic Supply Clamp |
Use Scenario: Protecting constant-current LED driver ICs from input voltage spikes in streetlight controllers. IC Role / Device Role / Timing Role: Shunt limiter placed across DC input to absorb transient energy before it reaches driver MOSFET gate. Use Value: 16 kV HBM rating withstands electrostatic discharge during field maintenance without degradation. | Use Scenario: Clamping FPGA configuration voltage (VCCINT) during hot-swap insertion in telecom line cards. IC Role / Device Role / Timing Role: Fast-response voltage clamp limiting rail excursion during inrush or fault conditions. Use Value: −65 °C to +150 °C operating range ensures reliability across full telecom environmental specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1SMA5925BT3G | No AEC-Q101 qualification; same electrical specs and SMA package | Not approved for automotive production; suitable for commercial/industrial use only | Select when automotive qualification is not required and cost sensitivity is higher |
| MMSZ5240B-TP | 500 mW rating, 10 V nominal, SOD-123 package, 17 Ω ZZT, no AEC-Q101 | Lower power handling limits use to low-current biasing; smaller footprint reduces PCB area | Select for space-constrained consumer electronics where 1.5 W dissipation is unnecessary |
Compared with 1SMA5925BT3G and MMSZ5240B-TP, SZ1SMA5925BT3G uniquely combines automotive qualification, 1.5 W power capability, and 10 V regulation in the industry-standard SMA footprint-making it the only choice for AEC-compliant 12 V rail clamping where thermal margin and reliability are critical.
Availability
SZ1SMA5925BT3G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, and LED driver protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SZ1SMA5925BT3G 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.
SZ1SMA59xxBT3G belongs to onsemi's AEC-Q101-qualified Zener regulator family designed specifically for automotive subsystems requiring robust voltage clamping and biasing under extreme thermal and ESD stress.
FAQ
What is the exact zener voltage tolerance for SZ1SMA5925BT3G?
SZ1SMA5925BT3G has a ±5% zener voltage tolerance, with guaranteed minimum, nominal, and maximum values of 9.5 V, 10.0 V, and 10.5 V respectively at IZT = 4.5 mA and thermal equilibrium. This tolerance is explicitly defined in the Electrical Characteristics table on page 2 of the official onsemi datasheet.
Is SZ1SMA5925BT3G qualified for automotive use?
Yes, SZ1SMA5925BT3G 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 validation for under-hood and chassis-mounted applications.
What is the maximum power dissipation for SZ1SMA5925BT3G at 100°C lead temperature?
At 100°C lead temperature, SZ1SMA5925BT3G derates linearly from 1.5 W at 75°C using the 20 mW/°C derating factor. This yields 1.5 W − (100 − 75) × 0.02 W = 1.0 W maximum continuous power dissipation-verified in the Maximum Ratings table on page 1 of the datasheet.
Does SZ1SMA5925BT3G have a specified temperature coefficient?
Yes, Figure 6 in the onsemi datasheet shows the temperature coefficient (θVZ) for 10 V nominal Zeners like SZ1SMA5925BT3G is approximately +6.5 mV/°C near room temperature, indicating positive drift with increasing junction temperature-a key parameter for precision biasing stability.
What is the cathode marking convention for SZ1SMA5925BT3G?
SZ1SMA5925BT3G uses a molded cathode band on the SMA package body to identify the cathode terminal, as stated in the Mechanical Characteristics section. This band aligns with Pin 1 in Style 1 mechanical outline (case 403D), and must be oriented toward the higher-potential node in circuit layout.
SZ1SMA5925BT3G 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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 4.5 Ohms
- Current - Reverse Leakage @ Vr:
- 2.5 µA @ 8 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
SZ1SMA5925BT3G FAQ
1.How can I place an order for SZ1SMA5925BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMA5925BT3G 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 SZ1SMA5925BT3G reliable?
The price and inventory of SZ1SMA5925BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMA5925BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMA5925BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMA5925BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMA5925BT3G?
SZ1SMA5925BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMA5925BT3G 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 SZ1SMA5925BT3G?
For technical support, including SZ1SMA5925BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMA5925BT3G requirements.
6.How does Aetrix verify that SZ1SMA5925BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMA5925BT3G 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 SZ1SMA5925BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMA5925BT3G?
All SZ1SMA5925BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMA5925BT3G, 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 SZ1SMA5925BT3G part is unused and in its original packaging.
Return procedure for SZ1SMA5925BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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