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onsemi SZMM5Z33VT1G
- Part No.:
- SZMM5Z33VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z33VT1G.pdf
- Description:
- DIODE ZENER 33V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:42,459
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Product details
Overview
SZMM5Z33VT1G from onsemi is a 33 V, ±5% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 80 Ω maximum Zener impedance at 5 mA test current and 0.05 μA reverse leakage at 26.4 V, used for precision voltage clamping and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z33VT1G datasheet, pinout, applications, or equivalent options, key selection considerations include Zener voltage tolerance, thermal derating above 25 °C, ESD robustness (Class 3, >16 kV HBM), junction-to-ambient thermal resistance (250 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable 33 V regulation across load variations. Its 500 mW power rating and 250 °C/W thermal resistance define its safe operating area on FR-4 PCBs with 1 cm² copper pad.
The SZMM5Z33VT1G features a temperature coefficient of +23.2 mV/°C at IZT, enabling predictable voltage drift compensation in temperature-varying environments. It meets AEC-Q101 stress testing requirements and carries RoHS-compliant, matte tin lead finish with MSL 1 reflow compatibility up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal, 31–35 V range at 5 mA - defines clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 500 mW at 25 °C, derated 4.0 mW/°C above - sets maximum continuous power handling on standard FR-4 board |
| Zener Impedance (ZZT) | 80 Ω max at 5 mA - determines regulation stability under dynamic load transients |
| Reverse Leakage (IR) | 0.05 μA max at 26.4 V - ensures minimal standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust electrostatic immunity without external protection circuitry |
| Thermal Resistance (RJA) | 250 °C/W - enables thermal modeling for PCB layout and heatsinking decisions |
| AEC-Q101 Qualified | Yes - validates suitability for automotive electronic control units requiring high-reliability discrete components |
Pinout & Package
SOD-523 surface-mount package: 1.20 mm × 0.80 mm body, 0.70 mm height, void-free thermosetting plastic case with 100% matte tin lead finish. Mounting position unrestricted; qualified for 260 °C reflow per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage rail; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Connected to ground or lower-potential reference; completes conduction path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualification | Validated for automotive applications including engine control modules and infotainment power rails |
| High ESD Robustness | Class 3 (>16 kV HBM) eliminates need for external TVS in many handheld interface designs |
| Pb-Free & RoHS Compliance | Meets global environmental regulations with matte Sn finish compatible with lead-free assembly |
| Miniature SOD-523 Footprint | 1.20 mm × 0.80 mm area saves >60% board space vs. SOD-123, critical for ultra-thin mobile PCBs |
| Stable Temperature Coefficient | +23.2 mV/°C enables predictable voltage shift in thermal management circuits |
Applications
| USB Port Overvoltage Protection | Automotive Sensor Reference Clamping |
|---|---|
|
Use Scenario: Protects USB data/power lines from transient surges during hot-plug or ESD events in smartphones and tablets. IC Role / Device Role / Timing Role: Two-terminal shunt regulator that clamps line voltage to ≤35 V before downstream PHY ICs are exposed. Use Value: Prevents latch-up or permanent damage to USB transceivers by limiting peak voltage with <80 Ω dynamic impedance. |
Use Scenario: Stabilizes bias voltage for analog sensor signal conditioning in engine coolant temperature or pressure sensors. IC Role / Device Role / Timing Role: Precision voltage clamp referenced to vehicle battery rail, ensuring consistent ADC input range despite load-dump transients. Use Value: Maintains sensor accuracy across −40 °C to +125 °C ambient via AEC-Q101 validation and low thermal drift (+23.2 mV/°C). |
| Portable Device Power Rail Clamp | Industrial PLC Input Protection |
|
Use Scenario: Guards 3.3 V or 5 V microcontroller I/O pins against accidental 12 V misconnection or inductive kickback. IC Role / Device Role / Timing Role: Fast-response shunt element absorbing energy during short-duration overvoltage spikes. Use Value: Limits fault current to safe levels using 500 mW rating and 0.05 μA leakage-preserving battery life in always-on wearables. |
Use Scenario: Shields digital input channels in programmable logic controllers from field-wiring transients in factory automation environments. IC Role / Device Role / Timing Role: Primary overvoltage suppression stage placed before optocoupler or Schmitt-trigger input buffers. Use Value: Withstands repeated 16 kV HBM ESD strikes and supports long-term reliability under industrial temperature cycling (−65 °C to +150 °C). |
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-C33 | 33 V, ±5%, SOD-523, 300 mW rating, 90 Ω ZZT, no AEC-Q101 qualification | Limited to commercial-grade consumer electronics; not suitable for automotive or industrial temperature cycling | Select when cost sensitivity outweighs automotive qualification and higher power margin is unnecessary |
| MMSZ5260ET1G | 33 V, ±5%, SOD-123, 500 mW, 30 Ω ZZT, AEC-Q101 qualified, larger 3.5 mm × 1.6 mm footprint | Offers lower impedance but requires 3.5× more PCB area; better for high-current clamping with thermal margin | Choose when lower dynamic impedance is prioritized and board space permits SOD-123 layout |
Compared with BZX584-C33 and MMSZ5260ET1G, the SZMM5Z33VT1G uniquely balances AEC-Q101 compliance, miniature SOD-523 size, and 500 mW power in a single package-making it optimal for space-constrained automotive and portable designs where both reliability and footprint matter.
Availability
SZMM5Z33VT1G is available at Aetrix Electronics and suitable for USB interface protection, automotive sensor reference clamping, and portable device power rail clamp applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SZMM5Z33VT1G 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 MM5Z/SZMM5Z series was engineered specifically for miniaturized voltage regulation in high-density portable and automotive electronics, emphasizing small-footprint reliability, ESD resilience, and AEC-Q101 compliance.
FAQ
What is the Zener voltage tolerance of SZMM5Z33VT1G?
The SZMM5Z33VT1G has a nominal Zener voltage of 33 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 31.0 V and 35.0 V when tested at 5 mA (IZT) and 25 °C ambient temperature. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet.
Is SZMM5Z33VT1G qualified for automotive applications?
Yes, SZMM5Z33VT1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes devices meeting automotive-specific site and process control requirements, making SZMM5Z33VT1G suitable for use in engine control units, body electronics, and ADAS subsystems.
What is the maximum power dissipation for SZMM5Z33VT1G at 85 °C ambient?
At 85 °C ambient temperature, SZMM5Z33VT1G's maximum power dissipation is 260 mW. This is calculated from its 500 mW rating at 25 °C, derated linearly at 4.0 mW/°C: 500 mW − (85 − 25) × 4.0 mW = 260 mW. Derating follows the curve shown in Figure 1 of the onsemi datasheet.
Does SZMM5Z33VT1G have ESD protection built-in?
Yes, SZMM5Z33VT1G is rated Class 3 for Human Body Model (HBM) ESD with >16 kV withstand capability, as specified in the "Specification Features" section. This eliminates the need for additional discrete ESD protection in many portable interface designs, reducing BOM count and board area.
What is the cathode marking convention for SZMM5Z33VT1G in SOD-523 package?
SZMM5Z33VT1G uses Style 1 marking per the mechanical drawing: Pin 1 (cathode) is identified by a polarity band at the banded end of the SOD-523 package. The anode (Pin 2) is the opposite, unmarked terminal. This matches the generic marking diagram on page 5 of the onsemi datasheet.
SZMM5Z33VT1G 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):
- 33 V
- Tolerance:
- ±6.1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.2 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
SZMM5Z33VT1G FAQ
1.How can I place an order for SZMM5Z33VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z33VT1G 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 SZMM5Z33VT1G reliable?
The price and inventory of SZMM5Z33VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z33VT1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z33VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z33VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z33VT1G?
SZMM5Z33VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z33VT1G 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 SZMM5Z33VT1G?
For technical support, including SZMM5Z33VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z33VT1G requirements.
6.How does Aetrix verify that SZMM5Z33VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z33VT1G 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 SZMM5Z33VT1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z33VT1G?
All SZMM5Z33VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z33VT1G, 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 SZMM5Z33VT1G part is unused and in its original packaging.
Return procedure for SZMM5Z33VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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