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onsemi SZMM3Z11VT1G
- Part No.:
- SZMM3Z11VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z11VT1G.pdf
- Description:
- DIODE ZENER 11V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,840
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Product details
Overview
SZMM3Z11VT1G from onsemi is a 11 V, 300 mW Zener voltage regulator diode in SOD−323 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits. It delivers ±5% nominal Zener voltage tolerance (10.4–11.6 V), 20 Ω maximum dynamic impedance at 5 mA test current, and <0.1 µA reverse leakage at 8.0 V, supporting stable regulation in portable power rails.
For engineers reviewing the SZMM3Z11VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC−Q101 qualification, 16 kV HBM ESD rating, low 0.9 mm profile, and automotive-grade traceability-critical for battery management, USB port protection, and low-power sensor biasing.
Technical Context
This device operates as a two-terminal, cathode-anode polarized Zener diode with sharp reverse breakdown at 11 V. Its thermal resistance of 416 °C/W and 300 mW steady-state dissipation enable reliable operation up to +150 °C junction temperature, with derating starting above 25 °C ambient.
The SOD−323 package features Pb-free plating, UL 94 V−0 flammability rating, and void-free molded plastic construction. Polarity is marked by a cathode band, and mounting position is unrestricted-supporting automated placement on high-density PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.4–11.6 V @ IZT = 5 mA - ensures tight regulation window for 12 V rail clamping and reference stability |
| Power Dissipation | 300 mW @ TA = 25°C - supports continuous operation in compact handheld PCB layouts without forced cooling |
| Zener Impedance (ZZT) | 20 Ω max @ 5 mA - maintains low AC impedance for effective noise suppression in analog reference paths |
| Reverse Leakage (IR) | <0.1 µA @ VR = 8.0 V - minimizes standby current drain in battery-powered systems |
| ESD Rating | Class 3 (>16 kV) HBM - provides robust handling during assembly and end-use in consumer electronics |
| Temperature Coefficient | +5.4 mV/°C - enables predictable drift compensation in temperature-sensitive voltage references |
| Capacitance | 130 pF @ VR = 0 V, f = 1 MHz - limits high-frequency coupling in RF-adjacent signal conditioning circuits |
Pinout & Package
SOD−323 surface-mount package: 1.7 mm × 1.25 mm body, 0.9 mm height, cathode-indicated polarity band. Weight: 4.507 mg/unit. Compatible with standard reflow profiles (260°C for 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased Zener terminal | Connected to higher-potential node for voltage clamping; polarity band identifies this terminal |
| 2 (Anode) | Reference/ground return path | Typically tied to system ground or low-side bias point; completes Zener conduction loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including infotainment power supplies and ADAS sensor interfaces |
| Pb-free & RoHS compliant | Meets global environmental compliance requirements without compromising solder joint reliability |
| Low-profile SOD−323 | Enables placement under connectors or in 0.5 mm pitch BGA escape zones on ultra-thin PCBs |
| High ESD immunity | Eliminates need for external TVS in USB Type-C port protection designs operating at 5 V/9 V |
| Stable tempco | +5.4 mV/°C allows accurate 11 V reference use across −40°C to +125°C industrial temperature range |
Applications
| USB Power Delivery Clamp | Automotive Cabin Sensor Bias |
|---|---|
Use Scenario: Clamping transient surges on USB PD CC lines during hot-plug events. IC Role / Device Role / Timing Role: Zener voltage clamp protecting USB PD controller I/O pins from >20 V transients. Use Value: 11 V breakdown prevents damage while maintaining signal integrity below 5 V logic thresholds. |
Use Scenario: Providing stable bias voltage to MEMS pressure sensors in HVAC control modules. IC Role / Device Role / Timing Role: Precision voltage reference ensuring consistent sensor output scaling across temperature. Use Value: ±5% VZ tolerance and +5.4 mV/°C tempco support <±1% full-scale accuracy over −40°C to +85°C. |
| Portable Medical Pulse Oximeter | Industrial IoT Node LDO Input Protection |
Use Scenario: Regulating LED drive voltage in battery-powered pulse oximeters with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Low-leakage (0.1 µA) Zener shunt regulating red/IR LED forward voltage. Use Value: Enables 100+ hour battery life while maintaining optical intensity stability via precise 11 V reference. |
Use Scenario: Protecting input stage of 3.3 V LDO from 12 V supply rail transients in factory automation nodes. IC Role / Device Role / Timing Role: Overvoltage clamp limiting LDO input to safe 11 V during load dump events. Use Value: 300 mW dissipation handles 100 ms transients without thermal runaway or parameter shift. |
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-B11,115 | Same 11 V nominal Zener, but 300 mW rating in SOD-323; ±5% tolerance; 20 Ω ZZT; no AEC-Q101 qualification | Lacks automotive qualification and 16 kV HBM ESD rating; suitable for commercial-grade consumer devices only | Select when cost sensitivity outweighs automotive compliance or ESD robustness requirements |
| MMSZ5240BT1G | 10 V nominal Zener, 500 mW rating in SOD-123; ±5% tolerance; 17 Ω ZZT; AEC-Q101 qualified | Lower voltage and higher power, but larger SOD-123 footprint; not drop-in compatible due to package and VZ mismatch | Choose when 10 V reference is acceptable and board layout allows 2.7 mm × 1.6 mm footprint |
Compared with BZX384-B11,115 and MMSZ5240BT1G, SZMM3Z11VT1G uniquely combines AEC-Q101 qualification, 11 V precision, SOD−323 miniaturization, and 16 kV ESD in one package-making it optimal for space-limited automotive and portable medical designs where both voltage accuracy and ruggedness are mandatory.
Availability
SZMM3Z11VT1G is available at Aetrix Electronics and suitable for USB power delivery protection, automotive cabin sensor biasing, and portable medical instrumentation requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 compliance.
Supply support for SZMM3Z11VT1G 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.
SZMM3ZxxxT1G series is part of onsemi's automotive-qualified Zener portfolio, engineered specifically for high-reliability voltage reference and transient suppression in safety-critical and space-constrained electronic systems.
FAQ
What is the Zener voltage tolerance of SZMM3Z11VT1G?
The SZMM3Z11VT1G has a nominal Zener voltage of 11 V with a tolerance of ±5%, resulting in a guaranteed breakdown range of 10.4 V to 11.6 V at 5 mA test current. This tolerance is verified per the Electrical Characteristics table in the official onsemi datasheet (Rev. 11, September 2014), and applies under standard 25°C ambient conditions.
Is SZMM3Z11VT1G suitable for automotive applications?
Yes, SZMM3Z11VT1G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix explicitly denoting automotive and other applications requiring unique site and control change requirements. Its construction, testing, and traceability meet automotive reliability standards-confirmed in the "Specification Features" section of the onsemi datasheet.
What is the maximum reverse leakage current for SZMM3Z11VT1G?
The maximum reverse leakage current for SZMM3Z11VT1G is 0.1 µA at a reverse voltage (VR) of 8.0 V, as specified in the Electrical Characteristics table. This low leakage supports extended battery life in always-on portable systems and ensures minimal loading on high-impedance reference nodes.
Does SZMM3Z11VT1G have ESD protection built-in?
Yes, SZMM3Z11VT1G features an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as stated in the Specification Features section. This level of on-chip ESD robustness eliminates the need for additional discrete protection in many interface applications, including USB and sensor I/O lines.
What is the thermal resistance (RJA) of SZMM3Z11VT1G?
The thermal resistance from junction to ambient (RJA) for SZMM3Z11VT1G is 416 °C/W, measured on an FR-4 board with a single-sided 1 cm² copper pad. This value governs thermal derating above 25°C ambient and is critical for calculating safe operating area in continuous-clamp applications.
SZMM3Z11VT1G 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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-323
SZMM3Z11VT1G FAQ
1.How can I place an order for SZMM3Z11VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z11VT1G 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 SZMM3Z11VT1G reliable?
The price and inventory of SZMM3Z11VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z11VT1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z11VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z11VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z11VT1G?
SZMM3Z11VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z11VT1G 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 SZMM3Z11VT1G?
For technical support, including SZMM3Z11VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z11VT1G requirements.
6.How does Aetrix verify that SZMM3Z11VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z11VT1G 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 SZMM3Z11VT1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z11VT1G?
All SZMM3Z11VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z11VT1G, 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 SZMM3Z11VT1G part is unused and in its original packaging.
Return procedure for SZMM3Z11VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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