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onsemi MM5Z33VT5G
- Part No.:
- MM5Z33VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z33VT5G.pdf
- Description:
- DIODE ZENER 33V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:16,000
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Product details
Overview
MM5Z33VT5G from onsemi is a 33 V, ±5% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation, 80 Ω maximum Zener impedance at 5 mA test current, and 0.05 μA reverse leakage at 27.4 V, used for precision voltage regulation and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the MM5Z33VT5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, low-profile SOD-523 footprint compatibility, thermal derating behavior above 25 °C, and Class 3 ESD robustness (>16 kV HBM) for handheld device front-end protection.
Technical Context
This device operates as a two-terminal voltage reference by maintaining a stable reverse breakdown voltage across its cathode-anode terminals under controlled current conditions. It exhibits a nominal temperature coefficient of +23.2 mV/°C and 70 pF junction capacitance at 0 V bias and 1 MHz, enabling predictable behavior in low-frequency regulation and transient clamping circuits.
The SOD-523 package imposes strict thermal limits: 500 mW maximum dissipation at 25 °C ambient, derating linearly at 4.0 mW/°C above that, with a junction-to-ambient thermal resistance of 250 °C/W on FR-4 board - critical for thermal design in high-density PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.0–35.0 V @ IZT = 5 mA; defines clamping threshold for overvoltage protection circuits |
| Tolerance | ±5%; ensures voltage regulation accuracy within defined system margin requirements |
| Power Rating | 500 mW @ TA = 25 °C; sets maximum continuous energy handling before thermal runaway |
| Zener Impedance | 80 Ω max @ IZT = 5 mA; determines regulation stiffness and output voltage variation under load shifts |
| Reverse Leakage | 0.05 μA @ VR = 27.4 V; guarantees minimal standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM); provides intrinsic robustness against human-handling electrostatic discharge |
| Junction Temp Range | −65 °C to +150 °C; supports operation in automotive under-hood and industrial environments |
Pinout & Package
SOD-523 surface-mount package: 1.20 mm × 0.80 mm body, 0.60 mm height, matte tin lead finish, MSL 1, Pb-free and RoHS compliant.
| 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 circuit ground or lower potential node; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small footprint | SOD-523 case (1.20 × 0.80 mm) enables placement on fine-pitch PCBs in smartphones and wearables |
| High ESD immunity | Class 3 HBM (>16 kV) eliminates need for external ESD protection in I/O line clamping |
| Precision voltage reference | 33 V ±5% with 23.2 mV/°C tempco supports stable regulation across −40 °C to +85 °C operating range |
| Low leakage performance | 0.05 μA @ 27.4 V minimizes quiescent current drain in always-on battery backup circuits |
| Thermal reliability | Qualified to AEC-Q101 (SZ variant) and rated for 150 °C junction temperature in harsh environments |
Applications
| Smartphone Power Rail Protection | USB Interface Overvoltage Clamp |
|---|---|
Use Scenario: Protecting 3.3 V or 5 V USB VBUS lines from transient surges during hot-plug events or ESD strikes. IC Role / Device Role / Timing Role: Zener clamping diode placed between VBUS and GND to shunt excess energy above 33 V threshold. Use Value: Prevents damage to USB controller ICs by limiting peak voltage to ≤35 V with <0.05 μA standby leakage. | Use Scenario: Safeguarding microcontroller GPIO pins connected to external sensors or buttons exposed to user handling. IC Role / Device Role / Timing Role: Standby voltage clamp referenced to MCU supply rail, activated only during overvoltage transients. Use Value: Leverages 16 kV HBM rating and 70 pF capacitance to suppress fast transients without signal integrity degradation. |
| Portable Medical Device Battery Monitor | Industrial Sensor Signal Conditioning |
Use Scenario: Stabilizing reference voltage for ADC input stages measuring Li-ion battery cell voltage in wearable health monitors. IC Role / Device Role / Timing Role: Precision Zener providing 33 V reference for voltage divider scaling of 0–4.2 V battery range. Use Value: ±5% tolerance and +23.2 mV/°C tempco enable accurate SOC estimation across operating temperature range. | Use Scenario: Regulating auxiliary supply rails feeding analog front-end amplifiers in factory-floor pressure/temperature transmitters. IC Role / Device Role / Timing Role: Low-power shunt regulator maintaining clean 33 V bias for op-amp bias networks. Use Value: 500 mW rating and 80 Ω ZZT ensure stable regulation under varying load currents up to 15 mA. |
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, 500 mW, but higher ZZT = 90 Ω and 0.1 μA leakage at 27.4 V | Less precise regulation under dynamic load; higher standby current reduces battery life in ultra-low-power designs | Select MM5Z33VT5G when tighter impedance control and sub-0.1 μA leakage are required |
| MMSZ5260ET1G | 33 V ±5%, SOD-123, 500 mW, larger 3.5 × 1.6 mm footprint and 100 Ω ZZT | Not suitable for ultra-dense layouts; requires PCB redesign due to incompatible pad geometry | Choose MM5Z33VT5G for new designs targeting miniaturization without sacrificing regulation accuracy |
Compared with BZX584-C33 and MMSZ5260ET1G, MM5Z33VT5G delivers superior regulation stability (80 Ω vs. ≥90 Ω ZZT), lower leakage (0.05 μA vs. ≥0.1 μA), and identical SOD-523 footprint compatibility - making it optimal for next-generation portable electronics requiring both size and precision.
Availability
MM5Z33VT5G is available at Aetrix Electronics and suitable for smartphone power rail protection, USB interface overvoltage clamp, and portable medical device battery monitor applications requiring stable component supply and long-term lifecycle support.
Supply support for MM5Z33VT5G 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 MM5ZxxxT5G series is part of onsemi's precision Zener regulator portfolio, engineered specifically for compact, high-reliability voltage reference and transient suppression in portable and space-constrained electronic systems.
FAQ
What is the Zener voltage tolerance of MM5Z33VT5G?
The MM5Z33VT5G has a standard tolerance of ±5%, meaning its nominal 33 V Zener voltage is guaranteed between 31.0 V and 35.0 V when tested at 5 mA reverse current and 25 °C ambient temperature. This tolerance band is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet.
Does MM5Z33VT5G meet automotive qualification standards?
The base MM5Z33VT5G is not AEC-Q101 qualified; however, the SZMM5Z33VT5G variant - which shares identical electrical specs and SOD-523 packaging - is explicitly rated for automotive use, with PPAP capability and unique site/control change tracking per onsemi documentation.
What is the maximum power dissipation for MM5Z33VT5G at 70 °C ambient?
At 70 °C ambient, MM5Z33VT5G's maximum power dissipation is 320 mW. This is calculated using the 4.0 mW/°C derating factor from its 500 mW rating at 25 °C: 500 mW − (45 °C × 4.0 mW/°C) = 320 mW, as specified in the Maximum Ratings table.
How is polarity identified on the MM5Z33VT5G SOD-523 package?
MM5Z33VT5G uses Style 1 marking: a visible cathode band (dark stripe) on the SOD-523 body identifies Pin 1 as the cathode; Pin 2 is the anode. This polarity marking aligns with JEDEC-standard SOD-523 mechanical drawings and is verified in the "Marking Diagram" section of the onsemi datasheet.
What is the junction capacitance of MM5Z33VT5G and how does it affect high-frequency performance?
MM5Z33VT5G has a maximum junction capacitance of 70 pF measured at 0 V reverse bias and 1 MHz frequency. This value limits its effectiveness in RF or >10 MHz transient suppression but remains appropriate for DC regulation and low-speed digital I/O clamping in portable electronics.
MM5Z33VT5G 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:
- ±6.06%
- 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z33VT5G FAQ
1.How can I place an order for MM5Z33VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z33VT5G 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 MM5Z33VT5G reliable?
The price and inventory of MM5Z33VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z33VT5G is usually 5 days.
3.What payment methods are accepted for MM5Z33VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z33VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z33VT5G?
MM5Z33VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z33VT5G 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 MM5Z33VT5G?
For technical support, including MM5Z33VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z33VT5G requirements.
6.How does Aetrix verify that MM5Z33VT5G is sourced from the original manufacturer or authorized distributors?
All MM5Z33VT5G 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 MM5Z33VT5G meets industry standards.
7.What is the process for return or replacement of MM5Z33VT5G?
All MM5Z33VT5G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z33VT5G, 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 MM5Z33VT5G part is unused and in its original packaging.
Return procedure for MM5Z33VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z33VT5G Tags
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