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onsemi SZMM5Z47VT1G
- Part No.:
- SZMM5Z47VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z47VT1G.pdf
- Description:
- DIODE ZENER 47V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
SZMM5Z47VT1G from onsemi is a 47 V ±5% Zener voltage regulator diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 170 Ω maximum Zener impedance at 1 mA test current and 0.05 μA reverse leakage at 32.9 V, used for precision voltage clamping and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z47VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), low-profile SOD-523 footprint (1.20 mm × 0.80 mm × 0.60 mm), AEC-Q101 qualification for automotive use, ESD robustness (>16 kV HBM), and thermal resistance of 250 °C/W.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse breakdown voltage across its cathode-anode terminals under controlled current conditions. Its Zener voltage is specified at 44–50 V (min–max) with nominal 47 V at IZT = 1 mA, and exhibits a temperature coefficient of +0.05 mV/°C per volt - resulting in +2.35 mV/°C total drift near nominal voltage.
The SOD-523 package enables high-density PCB layouts with MSL 1 reflow compatibility up to 260 °C and Pb-free matte tin lead finish. It delivers 40 pF capacitance at 0 V bias and 1 MHz, supporting fast transient response in ESD-critical signal lines and power rail clamp circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44–50 V min–max at IZT = 1 mA; ensures reliable clamping within ±5% tolerance for 3.3 V/5 V/12 V rail protection. |
| Power Dissipation (PD) | 500 mW at TA = 25 °C; derates linearly to zero at 150 °C ambient, limiting continuous clamp energy in handheld devices. |
| Zener Impedance (ZZT) | 170 Ω max at IZT = 1 mA; defines voltage regulation stiffness during transient surges in low-current bias networks. |
| Reverse Leakage (IR) | 0.05 μA max at VR = 32.9 V; minimizes standby current draw in battery-powered sensor nodes and RF front-ends. |
| Capacitance (C) | 40 pF at VR = 0 V, f = 1 MHz; preserves signal integrity in high-speed data lines without excessive loading. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; provides intrinsic ESD immunity for USB, audio jack, and button interface protection. |
| Package | SOD-523 (1.20 mm × 0.80 mm × 0.60 mm); fits 0402-footprint PCB real estate while enabling automated placement. |
Pinout & Package
SOD-523 surface-mount package with molded thermosetting plastic case (UL 94 V-0), matte tin lead finish, and MSL 1 reflow rating. Mounting position unrestricted; qualified for 260 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to higher-potential node; reverse-biased terminal where Zener breakdown occurs during overvoltage events. |
| 2 | Anode | Connected to reference or ground; completes current path during clamping; polarity band identifies cathode for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power rails and body control module I/O protection. |
| Low Profile (0.60 mm height) | Enables stacking under connectors or beneath shields in ultra-thin mobile designs without mechanical interference. |
| 100% Matte Tin Lead Finish | Eliminates lead-free solder wetting issues and intermetallic growth concerns in high-reliability industrial assemblies. |
| Stable Temperature Coefficient | +0.05 mV/°C/V yields +2.35 mV/°C total drift - predictable voltage shift across −65 to +150 °C operating range. |
| High ESD Robustness | Withstands >16 kV HBM discharges without parameter shift, reducing need for external TVS stages in cost-sensitive designs. |
Applications
| USB Type-C Port Protection | Automotive Infotainment Power Rail Clamp |
|---|---|
|
Use Scenario: Clamping transient surges on VBUS and CC lines during hot-plug insertion or ESD events. IC Role / Device Role / Timing Role: Shunt regulator providing low-energy voltage clamping at 47 V to prevent damage to USB PD controllers and level-shifters. Use Value: 40 pF capacitance avoids signal integrity degradation on 10 Gbps SuperSpeed+ lanes while sustaining >16 kV HBM immunity. |
Use Scenario: Suppressing load-dump transients on 12 V supply lines feeding display drivers and audio amplifiers. IC Role / Device Role / Timing Role: Standby-mode Zener clamp activated only during overvoltage excursions above 47 V, minimizing quiescent power loss. Use Value: AEC-Q101 qualification and −65 to +150 °C operation ensure reliability in under-hood and dashboard environments. |
| Portable Medical Sensor Biasing | Industrial IoT Node Battery Monitoring |
|
Use Scenario: Providing stable reference voltage for analog front-end amplifiers in wearable ECG/SpO₂ modules. IC Role / Device Role / Timing Role: Precision Zener source delivering 47 V reference for high-gain instrumentation amplifier bias networks. Use Value: ±5% tolerance and 170 Ω ZZT enable sub-2.5 V output variation across 0.1–10 mA bias current range. |
Use Scenario: Protecting ADC input channels monitoring Li-ion battery pack voltage during charging faults. IC Role / Device Role / Timing Role: Overvoltage limiter clamping cell-string voltage spikes before they reach 24-bit sigma-delta converters. Use Value: 0.05 μA leakage at 32.9 V prevents measurable error in 10 MΩ input impedance measurement paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C47 | 47 V ±5%, SOD-323 package (1.7 × 1.3 × 0.95 mm), 300 mW PD, 100 Ω ZZT @ 5 mA | Larger footprint and lower power rating limit use in ultra-dense layouts; lacks AEC-Q101 qualification | Select when board space allows larger package and automotive compliance is not required |
| MMSZ47ET1G | 47 V ±5%, SOD-123 package (3.7 × 1.6 × 1.1 mm), 500 mW PD, 100 Ω ZZT @ 10 mA, no AEC-Q101 | 3× larger area than SOD-523; higher test current shifts regulation point; unqualified for automotive | Choose for legacy designs using SOD-123 footprints or where higher Zener current capability is needed |
Compared with BZX584-C47 and MMSZ47ET1G, SZMM5Z47VT1G offers the smallest footprint (SOD-523), AEC-Q101 qualification, and optimized low-current regulation (1 mA IZT), making it uniquely suitable for next-generation automotive and portable medical devices requiring minimal PCB area and certified reliability.
Availability
SZMM5Z47VT1G is available at Aetrix Electronics and suitable for USB Type-C port protection, automotive infotainment power rail clamp, and portable medical sensor biasing requiring stable component supply across high-mix production runs.
Supply support for SZMM5Z47VT1G 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.
SZMM5Z47VT1G belongs to the MM5ZxxxT1G/SZMM5ZxxxT1G series - engineered for compact, high-reliability voltage regulation in space-constrained and mission-critical systems.
FAQ
What is the Zener voltage tolerance of SZMM5Z47VT1G?
The SZMM5Z47VT1G has a nominal Zener voltage of 47 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 44 V and 50 V when measured at IZT = 1 mA and TA = 25 °C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet (Rev. 19, April 2025).
Is SZMM5Z47VT1G qualified for automotive applications?
Yes, SZMM5Z47VT1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, making SZMM5Z47VT1G suitable for use in automotive infotainment, body electronics, and ADAS subsystems.
What is the maximum power dissipation of SZMM5Z47VT1G at 85 °C ambient?
At 85 °C ambient temperature, SZMM5Z47VT1G's maximum power dissipation is 260 mW. This is calculated using the derating factor of 4.0 mW/°C from the Maximum Ratings table: 500 mW − (85 − 25) × 4.0 = 260 mW. Derating applies to FR-4 boards with 1 cm² copper pad per the datasheet note.
Does SZMM5Z47VT1G have a polarity marking, and how is it oriented?
Yes, SZMM5Z47VT1G uses Style 1 marking with a cathode band on Pin 1. As shown in the Generic Marking Diagram (page 1 of datasheet), the banded end corresponds to the cathode terminal, and Pin 2 is the anode. Correct orientation is essential for proper reverse-bias operation during voltage clamping.
What is the reverse leakage current specification for SZMM5Z47VT1G?
SZMM5Z47VT1G specifies a maximum reverse leakage current (IR) of 0.05 μA at VR = 32.9 V and TA = 25 °C. This value is listed in the Electrical Characteristics table on page 3 and reflects minimal standby current draw, critical for battery-operated applications like portable medical sensors.
SZMM5Z47VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6.4%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z47VT1G FAQ
1.How can I place an order for SZMM5Z47VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z47VT1G 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 SZMM5Z47VT1G reliable?
The price and inventory of SZMM5Z47VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z47VT1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z47VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z47VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z47VT1G?
SZMM5Z47VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z47VT1G 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 SZMM5Z47VT1G?
For technical support, including SZMM5Z47VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z47VT1G requirements.
6.How does Aetrix verify that SZMM5Z47VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z47VT1G 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 SZMM5Z47VT1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z47VT1G?
All SZMM5Z47VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z47VT1G, 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 SZMM5Z47VT1G part is unused and in its original packaging.
Return procedure for SZMM5Z47VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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