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onsemi SZMMSZ11T1G
- Part No.:
- SZMMSZ11T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ11T1G.pdf
- Description:
- DIODE ZENER 11V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,047
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Product details
Overview
SZMMSZ11T1G from onsemi is a 500 mW, ±5% tolerance Zener diode in SOD−123 package with nominal reverse breakdown voltage of 11 V at 5 mA test current, dynamic impedance of 20 Ω, and leakage current ≤0.1 μA at 8.8 V; used for precision voltage regulation and overvoltage protection in automotive power rails and low-power sensor interfaces.
For engineers reviewing the SZMMSZ11T1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, AEC−Q101 qualification status, and direct alternatives for board-level voltage reference design.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse bias above its specified Zener voltage (10.45–11.55 V) with tight 5% tolerance and low dynamic impedance (20 Ω at 5 mA), enabling stable clamping in feedback loops and supply rail supervision circuits.
It features Class 3 ESD robustness (>16 kV HBM), operates across −55°C to +150°C junction temperature range, and is qualified to AEC−Q101 for automotive use-its SOD−123 package supports automated placement and meets UL 94 V−0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.45–11.55 V @ IZT = 5 mA; ensures precise clamping within ±5% tolerance for 12 V system monitoring |
| Power Dissipation | 500 mW on FR−5 board @ TL = 75°C; supports continuous operation in compact PCB layouts with thermal relief |
| Zener Impedance (ZZT) | 20 Ω max @ IZT = 5 mA; minimizes output voltage variation under load transients |
| Reverse Leakage Current | ≤0.1 μA @ VR = 8.8 V; enables low-quiescent-current biasing in battery-powered sensors |
| Junction Temp Range | −55°C to +150°C; validated for under-hood automotive environments and industrial control enclosures |
| ESD Rating | Class 3 (>16 kV) per HBM; protects against handling and assembly electrostatic discharge without external suppressors |
Pinout & Package
SOD−123 surface-mount package (1.60 × 2.69 × 1.16 mm), void-free thermosetting plastic case with cathode polarity band; designed for high-density layout and reflow compatibility up to 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output or higher-potential node; reverse-biased during Zener conduction |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes current path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive electronics including engine control modules and body controllers |
| Pb−Free Packaging | RoHS-compliant SOD−123 construction with corrosion-resistant, solderable finish |
| Thermal Derating Curve | 6.7 mW/°C reduction above 75°C ambient-enables accurate power budgeting in sealed enclosures |
| Low Capacitance | ~10 pF typical @ 50% VZ; preserves signal integrity in high-frequency sensing paths |
Applications
| Automotive Power Rail Clamp | Industrial Sensor Reference |
|---|---|
Use Scenario: Clamping transient spikes on 12 V battery-supplied microcontroller power inputs in vehicle infotainment systems. IC Role / Device Role / Timing Role: Zener diode providing passive overvoltage protection by shunting excess energy to ground when rail exceeds 11.55 V. Use Value: Prevents MCU reset or latch-up during load-dump events without requiring active circuitry or additional BOM cost. | Use Scenario: Generating stable 11 V reference for analog front-end conditioning of pressure transducers in factory automation PLCs. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing fixed bias point for op-amp gain stages and ADC input scaling. Use Value: Delivers ±5% accuracy across −40°C to +125°C without trimming, reducing calibration overhead in field-deployed equipment. |
| USB-C Port Overvoltage Protection | IoT Node Battery Monitoring |
Use Scenario: Protecting USB-C PD controller ICs from accidental 15–20 V adapter misconnection in portable docking stations. IC Role / Device Role / Timing Role: Standby-mode clamp activated only during fault conditions, drawing negligible quiescent current (<0.1 μA). Use Value: Eliminates need for TVS diodes with higher clamping voltage, improving margin between operating and failure thresholds. | Use Scenario: Monitoring Li-ion cell voltage via resistive divider with Zener-stabilized reference in BLE-enabled asset trackers. IC Role / Device Role / Timing Role: Low-leakage voltage reference enabling accurate state-of-charge estimation over multi-year deployments. Use Value: Maintains <0.1 μA leakage at 8.8 V, extending battery life beyond 5 years in sleep-dominated operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ11T1G | No SZ prefix; commercial-grade version without AEC−Q101 qualification or PPAP support | Not suitable for automotive production; acceptable for industrial prototypes and consumer demos | Select when AEC−Q101 compliance is not required and cost sensitivity outweighs qualification needs |
| BZX84-C11 | SOT−23 package (larger footprint); 10% tolerance (10.5–11.6 V); 350 mW rating; no AEC−Q101 listing | Higher thermal resistance limits power handling in dense layouts; less precise regulation | Choose only if SOT−23 is already standardized in legacy designs and ±10% tolerance is acceptable |
Compared with MMSZ11T1G and BZX84-C11, SZMMSZ11T1G provides tighter voltage tolerance, higher power rating, and automotive qualification-making it the sole option for production-grade 12 V system protection where reliability and specification compliance are mandatory.
Availability
SZMMSZ11T1G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor reference design, and IoT battery monitoring applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SZMMSZ11T1G 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 is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
SZMMSZ11T1G belongs to the AEC−Q101-qualified SZMMSZxxxT1G Zener regulator series, engineered for reliable voltage reference and overvoltage protection in harsh-environment automotive electronics.
FAQ
What is the Zener voltage tolerance of SZMMSZ11T1G?
SZMMSZ11T1G has a ±5% tolerance on its nominal 11 V Zener voltage, resulting in a guaranteed reverse breakdown range of 10.45 V to 11.55 V at IZT = 5 mA. This tight tolerance supports precision regulation in automotive and industrial applications where voltage margins are constrained.
Is SZMMSZ11T1G qualified for automotive use?
Yes, SZMMSZ11T1G is AEC−Q101 qualified and PPAP capable-explicitly designed for automotive applications such as body control modules, lighting drivers, and powertrain subsystems. The "SZ" prefix denotes compliance with automotive-specific site and change control requirements.
What is the maximum power dissipation of SZMMSZ11T1G at 100°C ambient?
At 100°C ambient, SZMMSZ11T1G's power dissipation is derated linearly from 500 mW at 75°C using 6.7 mW/°C slope, yielding 332.5 mW maximum. This value assumes FR−5 board mounting and must be verified with actual board thermal performance.
Does SZMMSZ11T1G have Pb−free packaging?
Yes, SZMMSZ11T1G uses Pb−free SOD−123 packaging compliant with RoHS Directive 2011/65/EU. The "G" suffix in the part number confirms lead-free construction, and the device features a corrosion-resistant, easily solderable finish compatible with standard reflow profiles.
What is the reverse leakage current specification for SZMMSZ11T1G?
SZMMSZ11T1G specifies ≤0.1 μA reverse leakage current at VR = 8.8 V (80% of nominal VZ). This ultra-low leakage supports energy-sensitive applications like battery-backed sensors and always-on monitoring circuits where standby current must remain sub-microamp.
SZMMSZ11T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 500 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:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
SZMMSZ11T1G FAQ
1.How can I place an order for SZMMSZ11T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ11T1G 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 SZMMSZ11T1G reliable?
The price and inventory of SZMMSZ11T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ11T1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ11T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ11T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ11T1G?
SZMMSZ11T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ11T1G 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 SZMMSZ11T1G?
For technical support, including SZMMSZ11T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ11T1G requirements.
6.How does Aetrix verify that SZMMSZ11T1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ11T1G 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 SZMMSZ11T1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ11T1G?
All SZMMSZ11T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ11T1G, 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 SZMMSZ11T1G part is unused and in its original packaging.
Return procedure for SZMMSZ11T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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