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onsemi MM3Z3V3ST3G
- Part No.:
- MM3Z3V3ST3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z3V3ST3G.pdf
- Description:
- DIODE ZENER 3.43V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,662
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Product details
Overview
MM3Z3V3ST3G from onsemi is a 3.3 V, ±5% tolerance Zener diode in SOD−323 package with 300 mW power rating, 95 Ω dynamic impedance at 5 mA, and 1.0 μA reverse leakage at 1.0 V; used for precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the MM3Z3V3ST3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), low dynamic impedance (95 Ω), tight thermal coefficient (−3.5 mV/°C), ESD robustness (>16 kV HBM), and Pb-free SOD−323 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener regulator operates in reverse breakdown to maintain stable 3.3 V reference under varying load and temperature conditions. Its −3.5 mV/°C temperature coefficient ensures predictable drift across −65°C to +150°C junction range, and its 95 Ω Zener impedance at 5 mA supports low-noise regulation in feedback paths.
The device uses a planar-diffused silicon junction in void-free transfer-molded plastic (UL 94 V−0), with cathode marked by band polarity and Sn-only or Pb−Sn plating for reflow compatibility up to 260°C for 10 seconds. It meets AEC−Q101 requirements when ordered as SZ prefix variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.32 V to 3.53 V at 5 mA - defines precise regulation window for 3.3 V rail clamping or reference generation |
| Power Dissipation | 300 mW at 25°C - sets maximum continuous power handling on FR-4 board with 1 cm² pad |
| Zener Impedance (ZZT) | 95 Ω max at IZT = 5 mA - determines AC ripple rejection and regulation stability under dynamic load |
| Reverse Leakage (IR) | 1.0 μA max at VR = 1.0 V - ensures minimal standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against handling and system-level electrostatic discharge events |
| Package | SOD−323 (Case 477) - 1.7 mm × 1.25 mm × 0.9 mm footprint ideal for ultra-compact mobile PCBs |
Pinout & Package
SOD−323 surface-mount package with cathode indicated by polarity band; 2-terminal configuration optimized for minimal board area and automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during operation to clamp or reference |
| 2 (Anode) | Reference ground return | Typically tied to system ground or low-impedance return path for stable biasing |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener tolerance | ±5% at 5 mA - enables accurate 3.3 V reference without post-production trimming |
| Low-profile packaging | 0.9 mm height - allows stacking under shields or integration into thin handheld enclosures |
| High ESD immunity | >16 kV HBM - eliminates need for external TVS in many consumer interface circuits |
| Pb-free and RoHS compliant | Sn-only or Pb−Sn plating - supports lead-free reflow processes and global environmental compliance |
Applications
| Smartphone Power Management | USB-C Port Protection |
|---|---|
Use Scenario: Regulating auxiliary 3.3 V supply for PMIC monitoring circuitry in LTE smartphones. IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling and brown-out detection threshold. Use Value: ±5% VZ tolerance ensures consistent trip point across temperature and unit variance without calibration. |
Use Scenario: Clamping CC line voltage during USB-C cable insertion and hot-swap events. IC Role / Device Role / Timing Role: Overvoltage protector limiting CC pin to safe 3.3 V level during transient coupling. Use Value: 95 Ω ZZT and 1.0 μA IR minimize signal distortion while blocking >16 kV ESD pulses. |
| Wearable Sensor Node | Industrial IoT Gateway |
Use Scenario: Providing stable reference for analog front-end of optical heart-rate sensor ASIC. IC Role / Device Role / Timing Role: Low-drift voltage reference source for ratiometric measurement accuracy. Use Value: −3.5 mV/°C tempco maintains <±10 mV error over −20°C to +70°C operating range. |
Use Scenario: Protecting RS-485 transceiver VCC monitor input from induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Clamp diode absorbing fast transients before they reach fault-detection logic. Use Value: 300 mW power rating sustains 100 ms surge events without degradation in harsh industrial environments. |
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-B3V3,115 (Nexperia) | Same 3.3 V nominal, ±5% tolerance, but 200 mW rating and 110 Ω ZZT at 5 mA | Limited to lower-power sensing nodes; not recommended for sustained 300 mW dissipation | Select when board space allows larger SOD-323 variant and thermal margin is constrained |
| MMSZ4685T1G (onsemi) | 3.3 V nominal, ±5%, but 500 mW rating and 30 Ω ZZT; SOD-123 package (2.7 mm × 1.6 mm) | Higher power handling and lower impedance, but occupies 2.3× more PCB area | Choose for higher-reliability industrial designs where thermal headroom and regulation stiffness are critical |
Compared with BZX384-B3V3,115 and MMSZ4685T1G, the MM3Z3V3ST3G delivers optimal balance of ultra-compact size, 300 mW capability, and 95 Ω impedance-making it preferred for portable devices where board area and ESD robustness are co-prioritized.
Availability
MM3Z3V3ST3G is available at Aetrix Electronics and suitable for smartphone power management, USB-C port protection, wearable sensor nodes, and industrial IoT gateways requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MM3Z3V3ST3G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MM3ZxxxST1G series was designed specifically for space-constrained, high-reliability voltage regulation in portable and battery-powered electronics, emphasizing tight tolerance, low profile, and robust ESD performance.
FAQ
What is the Zener voltage tolerance of MM3Z3V3ST3G?
The MM3Z3V3ST3G has a specified Zener voltage range of 3.32 V to 3.53 V at 5 mA test current, corresponding to ±5% tolerance around the nominal 3.3 V rating. This tolerance is guaranteed across the full operating temperature range and is verified per production test limits in the official onsemi datasheet Rev. 24. The MM3Z3V3ST3G achieves this tight tolerance via process-controlled diffusion and screening.
Is MM3Z3V3ST3G suitable for automotive applications?
The MM3Z3V3ST3G itself is not AEC−Q101 qualified; however, the functionally identical SZMM3Z3V3ST3G variant carries AEC−Q101 qualification and PPAP capability. For automotive use, designers must specify the SZ prefix version. The MM3Z3V3ST3G remains appropriate for commercial and industrial applications where AEC−Q101 is not mandated.
What is the maximum steady-state power dissipation for MM3Z3V3ST3G?
The MM3Z3V3ST3G has a maximum steady-state power dissipation of 300 mW at 25°C ambient on an FR-4 board with a 1 cm² copper pad. Derating is linear at 2.4 mW/°C above 25°C, reaching zero dissipation at approximately 150°C ambient. This rating is validated per onsemi's thermal characterization methodology and applies directly to the MM3Z3V3ST3G in SOD−323 package.
Does MM3Z3V3ST3G have a defined forward voltage specification?
Yes - the MM3Z3V3ST3G specifies a maximum forward voltage (VF) of 0.9 V at 10 mA forward current, consistent across all variants in the MM3ZxxxST1G series. This parameter is measured under standard test conditions (TA = 25°C) and is documented in the Electrical Characteristics table of the official datasheet for the MM3Z3V3ST3G.
What is the Zener impedance of MM3Z3V3ST3G and why does it matter?
The MM3Z3V3ST3G has a maximum Zener impedance (ZZT) of 95 Ω at 5 mA test current. This value reflects the dynamic resistance in breakdown and directly impacts regulation accuracy under varying load currents - lower ZZT yields tighter voltage stability. At 1 mA, impedance rises significantly, confirming the MM3Z3V3ST3G is optimized for operation near its rated 5 mA test point.
MM3Z3V3ST3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.43 V
- Tolerance:
- ±3.07%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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-323
MM3Z3V3ST3G FAQ
1.How can I place an order for MM3Z3V3ST3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z3V3ST3G 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 MM3Z3V3ST3G reliable?
The price and inventory of MM3Z3V3ST3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z3V3ST3G is usually 5 days.
3.What payment methods are accepted for MM3Z3V3ST3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z3V3ST3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z3V3ST3G?
MM3Z3V3ST3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z3V3ST3G 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 MM3Z3V3ST3G?
For technical support, including MM3Z3V3ST3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z3V3ST3G requirements.
6.How does Aetrix verify that MM3Z3V3ST3G is sourced from the original manufacturer or authorized distributors?
All MM3Z3V3ST3G 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 MM3Z3V3ST3G meets industry standards.
7.What is the process for return or replacement of MM3Z3V3ST3G?
All MM3Z3V3ST3G units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z3V3ST3G, 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 MM3Z3V3ST3G part is unused and in its original packaging.
Return procedure for MM3Z3V3ST3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z3V3ST3G Tags
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