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onsemi SZMMSZ5247BT1G
- Part No.:
- SZMMSZ5247BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5247BT1G.pdf
- Description:
- DIODE ZENER 17V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
SZMMSZ5247BT1G from onsemi is a 17 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 7.4 mA test current (IZT), 19 Ω dynamic impedance (ZZT), and 0.1 μA reverse leakage at 13 V (VR). It serves as a precision voltage reference or overvoltage clamp in low-power analog and power supply feedback circuits.
For engineers reviewing the SZMMSZ5247BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal equilibrium operation, junction-to-ambient thermal resistance (340 °C/W), ESD robustness (>16 kV HBM), and AEC−Q101 qualification for automotive use.
Technical Context
This device operates under thermal equilibrium conditions, where Zener voltage is specified at TL = 30°C ±1°C and measured with junction stabilized. Its 5% tolerance and 17 V nominal Zener voltage are validated at IZT = 7.4 mA with AC test signal (f = 1 kHz, IZ(AC) = 0.1 IZ(DC)).
The SOD−123 package enables automated assembly and delivers 340 °C/W junction-to-ambient thermal resistance on FR−5 board, supporting stable regulation up to +150°C junction temperature. Reverse leakage remains ≤0.1 μA at VR = 13 V, ensuring low standby power loss in voltage-sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.15–17.85 V @ IZT = 7.4 mA - defines stable regulation window for feedback or clamping |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous power handling on standard PCB |
| Zener Impedance (ZZT) | 19 Ω @ IZT - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | ≤0.1 μA @ VR = 13 V - ensures minimal quiescent current in high-impedance sensing nodes |
| Thermal Resistance (RJA) | 340 °C/W - quantifies temperature rise per watt on FR−5 board, critical for thermal design |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling in automated manufacturing and field environments |
| Junction Temp Range | −55°C to +150°C - enables operation in automotive under-hood and industrial control environments |
Pinout & Package
SOD−123 surface-mount package: 1.60 mm × 2.69 mm × 1.16 mm, void-free thermosetting plastic case with cathode band marking. Lead-free (Pb−Free), UL 94 V−0 rated, solderable at 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during normal operation |
| 2 (Anode) | Reference/ground terminal | Tied to circuit common or ground; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive electronics including engine control and body modules |
| 500 mW rating on FR−5 board | Enables use in space-constrained PCBs without external heatsinking |
| Small SOD−123 footprint | Supports high-density layouts in portable and IoT devices |
| ESD robustness >16 kV HBM | Reduces need for external ESD protection in input-stage designs |
| Pb−Free and RoHS compliant | Meets global environmental compliance requirements for industrial and consumer products |
Applications
| Automotive Sensor Reference | Industrial Power Supply Feedback |
|---|---|
Use Scenario: Providing stable 17 V reference for analog sensor signal conditioning in engine temperature or pressure modules. IC Role / Device Role / Timing Role: Zener voltage reference establishing precise bias point for op-amp input stages. Use Value: Maintains <±1% output stability across −40°C to +125°C ambient due to thermal equilibrium specification and AEC−Q101 qualification. | Use Scenario: Clamping error amplifier reference in isolated DC−DC converter feedback loop. IC Role / Device Role / Timing Role: Precision shunt regulator setting output voltage via optocoupler feedback network. Use Value: 19 Ω ZZT minimizes output voltage drift under varying load conditions, improving regulation accuracy to ±1.5%. |
| Consumer USB Port Protection | Medical Instrument Voltage Clamp |
Use Scenario: Overvoltage protection for 5 V USB data lines against ESD and transient surges. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting line voltage to safe levels during surge events. Use Value: Class 3 ESD rating (>16 kV HBM) and low leakage (<0.1 μA) prevent false triggering while maintaining signal integrity. | Use Scenario: Protecting ADC input pins in portable diagnostic equipment from accidental overvoltage exposure. IC Role / Device Role / Timing Role: Low-leakage voltage clamp safeguarding sensitive analog front-end circuitry. Use Value: −55°C to +150°C operating range ensures reliability during sterilization cycles and extended field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5247BT1G | No AEC−Q101 qualification; same electrical specs and SOD−123 package | Intended for commercial/industrial use only; not approved for automotive production | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| SZMMBZ5247ET1G | Same 17 V Zener voltage but in SOT−23 package; 350 mW rating; different thermal resistance | Higher power density but reduced thermal performance; requires layout revision | Choose only if board space is more constrained than thermal margin, and requalification is feasible |
Compared with MMSZ5247BT1G and SZMMBZ5247ET1G, SZMMSZ5247BT1G uniquely combines AEC−Q101 compliance, 500 mW power capability, and SOD−123 manufacturability-making it the sole option qualified for automotive production without derating or package change.
Availability
SZMMSZ5247BT1G is available at Aetrix Electronics and suitable for automotive sensor modules, industrial power supplies, USB port protection circuits, and medical instrument voltage clamping requiring stable component supply and long-term lifecycle support.
Supply support for SZMMSZ5247BT1G 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 MMSZ52xxxT1G/SZMMSZ52xxxT1G series was designed specifically for high-reliability, surface-mount voltage regulation in space-constrained and thermally demanding environments-including automotive under-hood systems and industrial control units.
FAQ
What is the Zener voltage tolerance of SZMMSZ5247BT1G?
The SZMMSZ5247BT1G has a ±5% Zener voltage tolerance, with a nominal value of 17 V and a specified range of 16.15 V to 17.85 V at IZT = 7.4 mA and thermal equilibrium (TL = 30°C ±1°C). This tolerance is confirmed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the official onsemi datasheet.
Is SZMMSZ5247BT1G qualified for automotive applications?
Yes, SZMMSZ5247BT1G 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 and site-specific change management, making SZMMSZ5247BT1G suitable for production use in engine control units, body electronics, and ADAS subsystems.
What is the maximum power dissipation for SZMMSZ5247BT1G on a standard PCB?
SZMMSZ5247BT1G is rated for 500 mW total power dissipation on an FR−5 board at lead temperature (TL) = 75°C, with linear derating of 6.7 mW/°C above that temperature. This rating assumes the minimum recommended footprint and is validated per onsemi's thermal measurement methodology using infrared scanning.
Does SZMMSZ5247BT1G have ESD protection built-in?
Yes, SZMMSZ5247BT1G features an ESD rating of Class 3 (>16 kV) per Human Body Model (HBM), as documented in the "Features" section of the datasheet. This level of robustness eliminates the need for additional discrete ESD components in many interface protection designs, particularly in USB, sensor, and I/O line applications.
What is the reverse leakage current specification for SZMMSZ5247BT1G?
The reverse leakage current for SZMMSZ5247BT1G is specified as ≤0.1 μA at VR = 13 V, per the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3. This low leakage ensures minimal parasitic loading in high-impedance voltage reference and sensing circuits, preserving accuracy in battery-powered and precision analog systems.
SZMMSZ5247BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 17 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 13 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
SZMMSZ5247BT1G FAQ
1.How can I place an order for SZMMSZ5247BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5247BT1G 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 SZMMSZ5247BT1G reliable?
The price and inventory of SZMMSZ5247BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5247BT1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5247BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5247BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5247BT1G?
SZMMSZ5247BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5247BT1G 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 SZMMSZ5247BT1G?
For technical support, including SZMMSZ5247BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5247BT1G requirements.
6.How does Aetrix verify that SZMMSZ5247BT1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5247BT1G 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 SZMMSZ5247BT1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5247BT1G?
All SZMMSZ5247BT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5247BT1G, 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 SZMMSZ5247BT1G part is unused and in its original packaging.
Return procedure for SZMMSZ5247BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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