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onsemi SZMMSZ4711T1G
- Part No.:
- SZMMSZ4711T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ4711T1G.pdf
- Description:
- DIODE ZENER 27V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:13,395
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Product details
Overview
SZMMSZ4711T1G from onsemi is a 27 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 50 µA test current (IZT), 0.01 µA reverse leakage at 20.4 V, and −55°C to +150°C operating temperature range-used for precision voltage reference and overvoltage protection in automotive power management circuits.
For engineers reviewing the SZMMSZ4711T1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, low IZT requirement, thermal derating behavior, and AEC−Q101 qualification for automotive-grade reliability validation.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across load variations by conducting reverse current above its specified Zener breakdown threshold. Its 27 V nominal Zener voltage exhibits a positive temperature coefficient near zero crossing, minimizing drift over temperature in biasing and sensing applications.
The SOD−123 package enables high-density PCB layout with verified thermal resistance of 340°C/W (junction-to-ambient) and 150°C/W (junction-to-lead), supporting reliable operation under sustained 500 mW dissipation when mounted on FR−5 board with minimum footprint.
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 regulation window for stable reference generation |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous power handling before thermal derating begins |
| Reverse Leakage (IR) | 0.01 µA @ VR = 20.4 V - ensures minimal quiescent current draw in standby or high-impedance monitoring circuits |
| Junction Temp Range | −55°C to +150°C - supports operation in under-hood automotive environments without derating loss |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against handling and assembly electrostatic discharge events |
| AEC−Q101 Qualified | Yes - confirms compliance with automotive stress testing requirements for reliability and lifetime validation |
Pinout & Package
SOD−123 surface-mount package: 2-pin, cathode-band marked, dimensions 1.60 × 2.69 × 1.16 mm, void-free thermosetting plastic case with UL 94 V−0 flammability rating and Pb−Free/RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point | Connected to regulated voltage node; reverse-biased during regulation; polarity band identifies this terminal |
| 2 (Anode) | Zener cathode connection point | Connected to circuit ground or lower potential reference; completes shunt path for excess current |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT test current | 50 µA enables stable regulation in ultra-low-power sensor biasing and battery-monitoring circuits |
| Automotive qualification | SZ-prefix and AEC−Q101 certification ensure suitability for engine control units and ADAS power rails |
| High ESD immunity | Class 3 (>16 kV HBM) eliminates need for external ESD protection in exposed I/O or interface nodes |
| Thermal performance | 340°C/W RJA allows direct integration into thermally constrained modules without heatsinking |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stable 27 V reference for analog front-end comparators monitoring battery voltage during cold-crank conditions. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise threshold for overvoltage detection and brown-out recovery logic. Use Value: Tight 5% VZ tolerance and −55°C to +150°C operation ensure consistent trip points across full vehicle lifecycle. |
Use Scenario: Biasing high-impedance bridge sensors in factory automation pressure transmitters. IC Role / Device Role / Timing Role: Low-leakage (0.01 µA) Zener reference establishing excitation voltage for Wheatstone bridge networks. Use Value: Minimal IR error preserves measurement accuracy in microamp-level signal chains without active buffering. |
| Medical Infusion Pump Power Monitoring | Telecom DC-DC Converter Feedback |
Use Scenario: Overvoltage clamp protecting microcontroller supply rail during AC/DC adapter fault conditions. IC Role / Device Role / Timing Role: Fail-safe shunt limiter absorbing transient energy above 28.35 V to prevent downstream IC damage. Use Value: 500 mW rating and 150°C max junction temperature support short-duration surge absorption without thermal runaway. |
Use Scenario: Precision voltage reference in isolated flyback converter feedback loop for telecom base station power supplies. IC Role / Device Role / Timing Role: Primary-side Zener reference setting output voltage via optocoupler feedback path. Use Value: Low dynamic impedance (ZZT) at 27 V improves regulation stability under variable load and line conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4711T1G | No SZ-prefix; not AEC−Q101 qualified; same electrical specs and SOD−123 package | Intended for industrial/commercial use only; lacks automotive PPAP documentation and site-specific controls | Select when automotive qualification is unnecessary and cost sensitivity outweighs qualification traceability |
| BZX84-C27LT1G | 27 V nominal, ±5% tolerance, but rated at 300 mW PD and higher IR (1 µA @ 21.6 V); SOT−23 package | Lower power handling limits use in high-surge environments; smaller SOT−23 footprint reduces thermal mass | Choose only for space-constrained non-automotive designs where 300 mW suffices and 1 µA leakage is acceptable |
Compared with MMSZ4711T1G and BZX84-C27LT1G, SZMMSZ4711T1G uniquely combines AEC−Q101 qualification, 500 mW power rating, and sub-0.1 µA leakage-making it the sole option for automotive-grade 27 V shunt regulation requiring both reliability and precision.
Availability
SZMMSZ4711T1G is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor conditioning, and medical infusion pump power monitoring requiring stable component supply with full AEC−Q101 traceability and long-term lifecycle support.
Supply support for SZMMSZ4711T1G 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, and IoT applications.
The MMSZ4xxxT1G/SZMMSZ4xxxT1G series was designed specifically for high-reliability voltage reference and overvoltage protection in automotive and industrial systems demanding tight Zener tolerance, low leakage, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of SZMMSZ4711T1G?
The SZMMSZ4711T1G has a nominal Zener voltage of 27 V with a tolerance of ±5%, meaning the actual measured VZ at IZT = 50 µA falls between 25.65 V and 28.35 V. This tolerance is guaranteed across the full operating temperature range of −55°C to +150°C and is verified per AEC−Q101 test conditions. The SZMMSZ4711T1G datasheet specifies these limits in the Electrical Characteristics table on page 3.
Is SZMMSZ4711T1G suitable for automotive applications?
Yes, SZMMSZ4711T1G is explicitly qualified to AEC−Q101 standards and designated with the "SZ" prefix to indicate automotive-grade manufacturing controls, PPAP capability, and site-specific change management. It meets all stress tests-including temperature cycling, humidity bias, and mechanical shock-required for under-hood and safety-critical ECUs. The SZMMSZ4711T1G data sheet confirms this qualification in the Features section and Ordering Information table.
What is the maximum reverse leakage current for SZMMSZ4711T1G?
The maximum reverse leakage current (IR) for SZMMSZ4711T1G is 0.01 µA at VR = 20.4 V and TA = 25°C, as specified in the Electrical Characteristics table. This ultra-low leakage supports high-impedance biasing applications such as precision sensor excitation and battery voltage monitoring where even nanoamp-level errors degrade accuracy. The SZMMSZ4711T1G maintains this performance across its full temperature range.
Does SZMMSZ4711T1G have Pb−Free and RoHS compliance?
Yes, SZMMSZ4711T1G is Pb−Free and fully RoHS compliant, as confirmed in the Features section of the official onsemi datasheet. The "G" suffix in the part number denotes Pb−Free packaging, and the device uses corrosion-resistant, easily solderable finishes compatible with standard reflow profiles up to 260°C for 10 seconds. Compliance documentation for SZMMSZ4711T1G is available through onsemi's environmental reports portal.
What is the thermal resistance of SZMMSZ4711T1G?
SZMMSZ4711T1G has a junction-to-ambient thermal resistance (RJA) of 340°C/W and junction-to-lead resistance (RJL) of 150°C/W, measured per infrared scan method on FR−5 board. These values define how effectively heat transfers from the silicon die to ambient air or PCB copper, directly impacting safe operating area calculations. The SZMMSZ4711T1G datasheet lists these parameters in the Maximum Ratings table on page 1.
SZMMSZ4711T1G 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:
- ±5%
- 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
SZMMSZ4711T1G FAQ
1.How can I place an order for SZMMSZ4711T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ4711T1G 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 SZMMSZ4711T1G reliable?
The price and inventory of SZMMSZ4711T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ4711T1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ4711T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ4711T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ4711T1G?
SZMMSZ4711T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ4711T1G 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 SZMMSZ4711T1G?
For technical support, including SZMMSZ4711T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ4711T1G requirements.
6.How does Aetrix verify that SZMMSZ4711T1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ4711T1G 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 SZMMSZ4711T1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ4711T1G?
All SZMMSZ4711T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ4711T1G, 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 SZMMSZ4711T1G part is unused and in its original packaging.
Return procedure for SZMMSZ4711T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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