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onsemi SZMMSZ4704T1G
- Part No.:
- SZMMSZ4704T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ4704T1G.pdf
- Description:
- DIODE ZENER 17V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:13,179
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Product details
Overview
SZMMSZ4704T1G from onsemi is a 17 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), 0.05 µA leakage at 12.9 V reverse bias, and AEC−Q101 qualification for automotive applications such as ECU power rail clamping.
For engineers reviewing the SZMMSZ4704T1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, low IZT requirement, thermal derating behavior, and automotive-grade reliability validation under temperature cycling and HBM ESD stress.
Technical Context
This device operates as a precision shunt voltage reference in feedback loops and overvoltage protection circuits, maintaining regulation across −55°C to +150°C junction temperature range with 150°C/W junction-to-lead thermal resistance. Its low 50 µA IZT enables stable operation in ultra-low-power bias networks.
The SOD−123 package supports automated placement and reflow soldering per JEDEC J-STD-020, with UL 94 V−0 flammability rating and 260°C/10s maximum soldering temperature. Cathode polarity is marked by a band on the case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17 V nominal, 16.15–17.85 V min/max at IZT = 50 µA - defines clamping threshold in protection circuits |
| Power Dissipation (PD) | 500 mW @ TL = 75°C, derated 6.7 mW/°C above - sets maximum continuous power in PCB layout |
| Reverse Leakage (IR) | 0.05 µA max @ VR = 12.9 V - ensures minimal quiescent current in standby mode |
| Junction Temp Range | −55°C to +150°C - supports operation in engine bay and industrial control environments |
| ESD Rating | Class 3 (>16 kV HBM) - withstands handling and board-level electrostatic discharge events |
| AEC−Q101 Qualified | Validated for automotive electronics per stress test requirements - enables use in ASIL-B systems |
Pinout & Package
SOD−123 surface-mount package: 1.60 mm × 2.69 mm × 1.16 mm body, void-free thermosetting plastic case, cathode indicated by polarity band, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener conduction |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW FR−5 board rating | Enables robust voltage clamping in space-constrained automotive PCBs without forced airflow |
| Low 50 µA IZT | Reduces minimum bias current requirement, improving efficiency in battery-powered sensor nodes |
| 16 kV HBM ESD rating | Eliminates need for external ESD protection in front-end interface circuits |
| AEC−Q101 qualification | Confirms reliability for 15-year automotive service life under thermal and vibration stress |
| SOD−123 footprint | Supports high-density routing and automated assembly compatible with industry-standard pick-and-place |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamping 12 V supply rail transients caused by load dump or alternator ripple in engine management systems. IC Role / Device Role / Timing Role: Shunt regulator providing overvoltage protection for microcontroller power domain. Use Value: Maintains 17 V clamp level with <0.05 µA leakage, preventing brownout while minimizing standby current draw. |
Use Scenario: Protecting 4–20 mA current loop receiver inputs from induced surges in factory floor wiring. IC Role / Device Role / Timing Role: Precision voltage clamp limiting input voltage to ADC front-end stage. Use Value: 17 V regulation with 150°C/W thermal resistance ensures stable clamping even during extended ambient temperature excursions. |
| Medical Infusion Pump Power Monitoring | Telecom Base Station DC-DC Feedback |
Use Scenario: Stabilizing reference voltage for battery voltage monitoring circuitry in portable medical devices. IC Role / Device Role / Timing Role: Low-current Zener reference enabling accurate SOC estimation at microamp bias levels. Use Value: 50 µA IZT allows operation from coin-cell sources without compromising regulation accuracy. |
Use Scenario: Providing precise feedback voltage reference for isolated flyback converter output regulation. IC Role / Device Role / Timing Role: Secondary-side shunt reference setting output voltage via optocoupler feedback path. Use Value: ±5% VZ tolerance and −55°C to +150°C operation ensure stable output across telecom environmental specifications. |
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-C16LT1G | 16 V nominal, ±5% tolerance, 300 mW rating, SOT-23 package | Limited to lower-power applications due to reduced PD and higher thermal resistance | Select when board space permits SOT-23 and 16 V clamping suffices |
| SZMMBZ5245BT1G | 16 V nominal, ±5%, 350 mW, SOT-23, 10 µA IZT | Lower IZT but reduced power handling and non-AEC-Q101 qualified | Prefer for cost-sensitive consumer designs where automotive qualification is unnecessary |
Compared with BZX84-C16LT1G and SZMMBZ5245BT1G, SZMMSZ4704T1G delivers higher power margin (500 mW vs ≤350 mW), AEC−Q101 compliance, and tighter thermal performance in SOD−123 - making it the only choice for automotive-grade 17 V clamping where reliability and thermal headroom are critical.
Availability
SZMMSZ4704T1G is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC analog protection, medical infusion pump monitoring, and telecom DC-DC feedback requiring stable component supply across long production lifecycles.
Supply support for SZMMSZ4704T1G 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 supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ4xxxT1G/SZMMSZ4xxxT1G series was engineered specifically for high-reliability voltage regulation in automotive and industrial environments, emphasizing low-leakage operation, AEC−Q101 qualification, and robust thermal performance in compact SOD−123 packaging.
FAQ
What is the nominal Zener voltage of SZMMSZ4704T1G and its tolerance?
The SZMMSZ4704T1G has a nominal Zener voltage of 17 V with a tolerance of ±5%, meaning the actual measured VZ falls between 16.15 V and 17.85 V when tested at IZT = 50 µA and TA = 25°C. This specification is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet for SZMMSZ4704T1G.
Is SZMMSZ4704T1G qualified for automotive applications?
Yes, SZMMSZ4704T1G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix explicitly indicating compliance for automotive and other high-reliability applications. It meets stress test requirements including temperature cycling, humidity bias, and mechanical shock, as validated by onsemi's automotive qualification program for the SZMMSZ4xxxT1G series.
What is the maximum power dissipation for SZMMSZ4704T1G and how does it derate with temperature?
SZMMSZ4704T1G is rated for 500 mW total power dissipation on FR−5 board at TL = 75°C, with linear derating of 6.7 mW/°C above that temperature. This derating behavior is defined in the Maximum Ratings table and verified via infrared scan method per onsemi's thermal characterization protocol for the SOD−123 package.
What is the reverse leakage current specification for SZMMSZ4704T1G?
The reverse leakage current (IR) for SZMMSZ4704T1G is specified as ≤0.05 µA at VR = 12.9 V and TA = 25°C. This value appears in the Electrical Characteristics table on page 3 of the datasheet and reflects the device's ability to minimize standby current in precision bias networks.
What package type and dimensions does SZMMSZ4704T1G use?
SZMMSZ4704T1G uses the SOD−123 surface-mount package (Case 425, Style 1), measuring 1.60 mm × 2.69 mm × 1.16 mm. The package features a cathode polarity band, UL 94 V−0 flammability rating, and is Pb−free and RoHS compliant - all confirmed in the Mechanical Characteristics section of the onsemi datasheet.
SZMMSZ4704T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 17 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.9 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
SZMMSZ4704T1G FAQ
1.How can I place an order for SZMMSZ4704T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ4704T1G 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 SZMMSZ4704T1G reliable?
The price and inventory of SZMMSZ4704T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ4704T1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ4704T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ4704T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ4704T1G?
SZMMSZ4704T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ4704T1G 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 SZMMSZ4704T1G?
For technical support, including SZMMSZ4704T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ4704T1G requirements.
6.How does Aetrix verify that SZMMSZ4704T1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ4704T1G 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 SZMMSZ4704T1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ4704T1G?
All SZMMSZ4704T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ4704T1G, 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 SZMMSZ4704T1G part is unused and in its original packaging.
Return procedure for SZMMSZ4704T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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