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onsemi SZMM3Z36VST1G
- Part No.:
- SZMM3Z36VST1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z36VST1G.pdf
- Description:
- DIODE ZENER 35.97V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SZMM3Z36VST1G from onsemi is a 36 V ±3.5% Zener voltage regulator diode in SOD−323 package, rated for 500 mW steady-state power dissipation, 25.2 mV/°C temperature coefficient, and 70 pF capacitance at 0 V bias-used for precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM3Z36VST1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±3.5%), low dynamic impedance (500 Ω @ IZT = 5 mA), AEC−Q101 qualification, ESD robustness (>16 kV HBM), and SOD−323 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal reverse-biased voltage reference, maintaining stable 35.07–36.87 V regulation under 5 mA test current. Its thermal resistance is 250 °C/W (with heatsink) and junction temperature range spans −65 °C to +150 °C.
Designed for low-capacitance signal-line protection, it exhibits 70 pF max capacitance at 0 V and 0.05 μA reverse leakage at VR = 25.2 V-enabling use in RF-adjacent or high-speed analog circuits without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.07–36.87 V @ IZT = 5 mA - defines precise clamping threshold for 36 V rail protection |
| Power Dissipation | 500 mW - supports continuous regulation in compact SOD−323 without external heatsink |
| Zener Impedance (ZZT) | 500 Ω max @ IZT - ensures minimal voltage shift under load transients |
| Temp. Coefficient (dVZ/dT) | +25.2 mV/°C - enables predictable drift compensation in automotive ambient ranges |
| Capacitance (C) | 70 pF max @ VR = 0 V, f = 1 MHz - preserves bandwidth in ESD-protected data lines |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for handheld interface ports |
| Leakage Current (IR) | 0.05 μA @ VR = 25.2 V - minimizes standby power loss in battery-powered systems |
Pinout & Package
SOD−323 surface-mount package: 1.70 mm × 1.25 mm × 0.85 mm body, cathode indicated by polarity band, Pb-free plating, UL 94 V−0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener tolerance | ±3.5% at 36 V - reduces need for post-regulation trimming in production |
| AEC−Q101 qualification | Automotive-grade reliability - validated for under-hood and infotainment module deployment |
| Low-profile SOD−323 | 0.85 mm height - fits beneath stacked connectors and thin shields in mobile designs |
| High ESD immunity | >16 kV HBM - eliminates need for supplemental TVS in USB/UART port protection |
| Pb-free & RoHS compliant | Halogen-free/BFR-free materials - satisfies EU and China RoHS compliance requirements |
Applications
| Cellular Baseband Power Rail Protection | Automotive Infotainment Display Biasing |
|---|---|
Use Scenario: Clamping transient spikes on 3.3 V or 5 V supply rails feeding LTE modem ICs in smartphones. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fast-response overvoltage suppression. Use Value: Prevents latch-up in baseband processors during ESD events while adding <0.02 mm² PCB area. | Use Scenario: Stabilizing backlight LED driver reference voltage in 12 V automotive display modules. IC Role / Device Role / Timing Role: Precision voltage reference source for current-sense amplifier feedback networks. Use Value: Maintains ±3.5% output accuracy across −40 °C to +125 °C, eliminating calibration drift. |
| Industrial Sensor Signal Conditioning | USB-C Port VBUS Monitoring |
Use Scenario: Providing stable excitation voltage for bridge-based pressure sensors in factory automation nodes. IC Role / Device Role / Timing Role: Low-noise, low-capacitance reference element in analog front-end circuitry. Use Value: 70 pF capacitance avoids loading 100 kHz sensor output signals; 0.05 μA leakage preserves microamp-level sleep current. | Use Scenario: Detecting VBUS presence and overvoltage conditions on USB-C receptacles in docking stations. IC Role / Device Role / Timing Role: Fast-acting clamp protecting USB PD controller GPIOs from hot-plug surges. Use Value: 500 mW rating handles 100 ms surge events per USB Type-C specification; AEC−Q101 grade ensures field longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B36,115 | 36 V ±5%, 300 mW rating, SOD-323, no AEC-Q101 qualification | Limited to commercial-temp industrial use; lacks automotive stress validation | Select when cost sensitivity outweighs automotive qualification needs |
| MMSZ5245B-TP | 36 V ±5%, 500 mW, SOD-123, higher ZZT (700 Ω), no ESD rating specified | Requires larger PCB footprint (2.7 × 1.4 mm); unsuitable for ESD-critical interfaces | Choose only if SOD-123 layout is already fixed and ESD immunity is managed elsewhere |
Compared with BZX384-B36,115 and MMSZ5245B-TP, SZMM3Z36VST1G delivers tighter voltage tolerance (±3.5% vs. ±5%), certified automotive reliability, and superior ESD hardness-making it the preferred choice for next-generation portable and vehicle-integrated electronics where precision and ruggedness are co-required.
Availability
SZMM3Z36VST1G is available at Aetrix Electronics and suitable for cellular phone power management, automotive infotainment subsystems, and high-density PC board voltage referencing requiring stable component supply and full traceability.
Supply support for SZMM3Z36VST1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM3Z/SZMM3Z series was engineered specifically for space-constrained, high-reliability voltage regulation-targeting portable electronics, automotive control units, and industrial sensors needing tight-tolerance, low-capacitance Zener references.
FAQ
What is the exact Zener voltage range specified for SZMM3Z36VST1G?
The SZMM3Z36VST1G has a guaranteed Zener voltage range of 35.07 V to 36.87 V at IZT = 5 mA and TA = 25 °C. This 36 V nominal rating with ±3.5% tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet. The device maintains this regulation window across its full operating temperature range.
Is SZMM3Z36VST1G qualified for automotive applications?
Yes, SZMM3Z36VST1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and process controls, enabling use in engine control units, ADAS modules, and infotainment systems meeting automotive reliability standards.
What is the maximum power dissipation capability of SZMM3Z36VST1G?
SZMM3Z36VST1G is rated for 500 mW steady-state power dissipation on an FR−4 board with a 0.72 mm² mounting pad and 38 mm² copper heatsink (Note 2 in Maximum Ratings). Derating is 4.0 mW/°C above 25 °C ambient, yielding ~300 mW usable power at 75 °C case temperature.
Does SZMM3Z36VST1G have ESD protection built-in?
Yes, SZMM3Z36VST1G features Class 3 ESD rating (>16 kV) per Human Body Model, as documented in the "Specification Features" section. This intrinsic robustness eliminates the need for external ESD suppressors in many interface protection schemes, including USB, UART, and sensor signal lines.
What package type and dimensions does SZMM3Z36VST1G use?
SZMM3Z36VST1G uses the SOD−323 package (Case 477, Style 1), measuring 1.70 mm × 1.25 mm × 0.85 mm with cathode indicated by a polarity band. Mechanical drawings confirm these dimensions on page 5 of the datasheet, and the package is Pb-free, RoHS-compliant, and UL 94 V−0 rated.
SZMM3Z36VST1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 35.97 V
- Tolerance:
- ±2.5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z36VST1G FAQ
1.How can I place an order for SZMM3Z36VST1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z36VST1G 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 SZMM3Z36VST1G reliable?
The price and inventory of SZMM3Z36VST1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z36VST1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z36VST1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z36VST1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z36VST1G?
SZMM3Z36VST1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z36VST1G 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 SZMM3Z36VST1G?
For technical support, including SZMM3Z36VST1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z36VST1G requirements.
6.How does Aetrix verify that SZMM3Z36VST1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z36VST1G 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 SZMM3Z36VST1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z36VST1G?
All SZMM3Z36VST1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z36VST1G, 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 SZMM3Z36VST1G part is unused and in its original packaging.
Return procedure for SZMM3Z36VST1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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