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onsemi SZMMSZ4711T3G
- Part No.:
- SZMMSZ4711T3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ4711T3G.pdf
- Description:
- DIODE ZENER 27V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:110,000
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Product details
Overview
SZMMSZ4711T3G from onsemi is a 27 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 50 µA test current (IZT), 20.4 V minimum reverse voltage (VR), and <10 nA leakage current at 20.4 V - used for precision voltage reference and overvoltage protection in automotive power management circuits.
For engineers reviewing the SZMMSZ4711T3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, low IZT requirement, AEC−Q101 qualification, thermal resistance (RJA = 340°C/W), and SOD−123 board assembly compatibility.
Technical Context
This device operates as a two-terminal silicon Zener diode with sharp reverse breakdown at nominal 27 V, optimized for stable voltage clamping under low-current bias conditions (IZT = 50 µA). Its thermal design supports operation from −55°C to +150°C junction temperature with 340°C/W junction-to-ambient resistance.
The SOD−123 package enables high-density surface-mount placement and automated assembly, while its Pb−Free, RoHS-compliant construction and Class 3 ESD rating (>16 kV HBM) meet automotive reliability requirements per AEC−Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.65 V (min) to 28.35 V (max) at IZT = 50 µA - defines tight 5% tolerance band for stable reference generation |
| Power Dissipation (PD) | 500 mW on FR−5 board at TL = 75°C - sets maximum continuous clamping capability without derating |
| Reverse Leakage (IR) | <10 nA at VR = 20.4 V - ensures minimal standby current in voltage-sense or protection circuits |
| Thermal Resistance (RJA) | 340°C/W - determines junction temperature rise under load; requires thermal relief for sustained 500 mW operation |
| Junction Temp Range | −55°C to +150°C - enables use in under-hood automotive environments and industrial control systems |
| ESD Rating | Class 3 (>16 kV HBM) - protects against handling-induced discharge during PCB assembly and field operation |
Pinout & Package
SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish, cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased to conduct at VZ during overvoltage events |
| 2 (Anode) | Reference/ground terminal | Tied to system ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Low IZT = 50 µA | Enables accurate regulation in ultra-low-power sensor biasing and battery-monitoring circuits |
| RoHS-compliant, Pb−Free | Meets global environmental compliance requirements without lead-based solder compatibility issues |
| Small SOD−123 footprint | Supports high-density PCB layouts in space-constrained modules such as ADAS ECUs and infotainment power supplies |
| High ESD immunity | Withstands >16 kV human-body-model discharge - reduces need for external ESD protection components |
Applications
| Automotive Power Rail Protection | Industrial Sensor Reference |
|---|---|
Use Scenario: Clamping transient spikes on 24 V battery-supplied microcontroller I/O lines in vehicle telematics modules. IC Role / Device Role / Timing Role: Zener voltage clamp protecting downstream logic inputs from load-dump surges up to 40 V. Use Value: Maintains 27 V clamping threshold with <10 nA leakage, preventing false triggering while minimizing standby power draw. |
Use Scenario: Providing stable reference voltage for 16-bit ADCs measuring pressure transducer outputs in factory automation PLCs. IC Role / Device Role / Timing Role: Precision voltage reference source with 5% VZ tolerance and low TC drift across −40°C to +85°C ambient. Use Value: Enables <±0.5% full-scale measurement accuracy without active regulation or trimming circuitry. |
| LED Driver Overvoltage Clamp | USB-C Port Voltage Limiting |
Use Scenario: Safeguarding constant-current LED driver ICs from input overvoltage during hot-plug events in commercial lighting fixtures. IC Role / Device Role / Timing Role: Fast-response shunt regulator absorbing surge energy before it reaches sensitive driver FETs or controllers. Use Value: Delivers 500 mW peak clamping capacity with 340°C/W RJA, allowing brief 200 ms surges without thermal runaway. |
Use Scenario: Limiting VBUS voltage to safe levels during USB-C PD negotiation failures or adapter misconfiguration. IC Role / Device Role / Timing Role: Secondary overvoltage protection element placed after primary DC-DC converter output stage. Use Value: Activates at 27 V with 50 µA IZT, ensuring fast response without loading the 20 V PD rail during normal 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 |
|---|---|---|---|
| BZX84-C27LT1G | Same 27 V nominal Zener, but 350 mW rating and SOT-23 package; higher RJA (~450°C/W) | Limited to lower-power portable electronics due to reduced power handling and thermal performance | Select when board space allows SOT-23 and thermal load remains below 350 mW |
| SZBZX84C27LT3G | AEC−Q101 qualified like SZMMSZ4711T3G, but 27 V ±5%, 350 mW, SOT-23 - no SOD−123 footprint match | Requires PCB redesign; suitable only where SOT-23 is already standardized and automotive qualification is mandatory | Choose only if legacy SOT-23 layout exists and 500 mW capability is not required |
Compared with BZX84-C27LT1G and SZBZX84C27LT3G, SZMMSZ4711T3G provides 43% higher power rating and superior thermal resistance in the compact SOD−123 form factor - making it preferred for automotive and industrial applications demanding robust, high-density voltage clamping.
Availability
SZMMSZ4711T3G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, and LED driver protection requiring stable component supply with AEC−Q101 traceability and long-term lifecycle support.
Supply support for SZMMSZ4711T3G 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.
SZMMSZ4xxxT3G series belongs to onsemi's automotive-grade Zener regulator portfolio, designed specifically for reliable voltage reference and transient suppression in harsh-environment electronic control units.
FAQ
What is the Zener voltage tolerance of SZMMSZ4711T3G?
The SZMMSZ4711T3G has a nominal Zener voltage of 27 V with a tolerance of ±5%, meaning the actual measured VZ falls between 25.65 V and 28.35 V when tested at IZT = 50 µA and TA = 25°C. This tight tolerance ensures predictable clamping behavior in precision reference and protection circuits where voltage stability is critical. The SZMMSZ4711T3G datasheet confirms this range in its Electrical Characteristics table.
Is SZMMSZ4711T3G suitable for automotive applications?
Yes, SZMMSZ4711T3G is AEC−Q101 qualified and PPAP capable, with an SZ prefix indicating compliance for automotive and other high-reliability applications. It operates across −55°C to +150°C junction temperature and features Class 3 ESD immunity (>16 kV HBM), making it appropriate for engine control, body electronics, and ADAS modules. The SZMMSZ4711T3G meets stringent automotive stress testing and traceability requirements.
What is the maximum power dissipation for SZMMSZ4711T3G?
The SZMMSZ4711T3G is rated for 500 mW total power dissipation on FR−5 board at lead temperature (TL) of 75°C, with linear derating of 6.7 mW/°C above that temperature. This rating assumes proper PCB copper area and thermal relief design. Exceeding this limit risks thermal instability or permanent damage, so thermal modeling is recommended for continuous operation near rated power. The SZMMSZ4711T3G datasheet specifies these limits in the Maximum Ratings table.
Does SZMMSZ4711T3G have a Pb−Free and RoHS-compliant package?
Yes, SZMMSZ4711T3G uses a Pb−Free, RoHS-compliant SOD−123 package marked with "G" per onsemi's packaging standard. The device meets EU RoHS Directive 2011/65/EU and is compatible with lead-free reflow soldering profiles up to 260°C for 10 seconds. This compliance is documented in the datasheet's Mechanical Characteristics and Ordering Information sections, confirming the SZMMSZ4711T3G as environmentally compliant for global manufacturing.
What is the reverse leakage current specification for SZMMSZ4711T3G?
The reverse leakage current (IR) for SZMMSZ4711T3G is specified as <10 nA at VR = 20.4 V and TA = 25°C. This ultra-low leakage ensures minimal parasitic current draw in high-impedance reference circuits and battery-powered systems. The value is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet for SZMMSZ4711T3G, supporting precision analog designs where leakage could affect accuracy.
SZMMSZ4711T3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 nA @ 20.4 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
SZMMSZ4711T3G FAQ
1.How can I place an order for SZMMSZ4711T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ4711T3G 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 SZMMSZ4711T3G reliable?
The price and inventory of SZMMSZ4711T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ4711T3G is usually 5 days.
3.What payment methods are accepted for SZMMSZ4711T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ4711T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ4711T3G?
SZMMSZ4711T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ4711T3G 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 SZMMSZ4711T3G?
For technical support, including SZMMSZ4711T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ4711T3G requirements.
6.How does Aetrix verify that SZMMSZ4711T3G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ4711T3G 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 SZMMSZ4711T3G meets industry standards.
7.What is the process for return or replacement of SZMMSZ4711T3G?
All SZMMSZ4711T3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ4711T3G, 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 SZMMSZ4711T3G part is unused and in its original packaging.
Return procedure for SZMMSZ4711T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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