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onsemi SZMMSZ4701T1G
- Part No.:
- SZMMSZ4701T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ4701T1G.pdf
- Description:
- DIODE ZENER 14V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,781
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Product details
Overview
SZMMSZ4701T1G from onsemi is a 14 V, 500 mW surface-mount Zener diode in SOD−123 package, optimized for precision voltage regulation and overvoltage protection in low-power analog circuits. It delivers ±5% nominal Zener voltage tolerance at 50 µA test current, features 0.05 µA reverse leakage at 10.6 V, and supports operation across −55°C to +150°C junction temperature range.
For engineers reviewing the SZMMSZ4701T1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, low IZT, thermal stability, and AEC−Q101 qualification for automotive subsystems.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reference voltage by conducting reverse current above its specified Zener breakdown threshold. Its 14 V nominal Zener voltage exhibits a positive temperature coefficient near zero crossing, minimizing drift in mid-range bias conditions.
The SOD−123 package enables automated placement while delivering 340°C/W junction-to-ambient thermal resistance on FR−5 board. With 150°C/W junction-to-lead resistance and 260°C soldering tolerance, it supports reflow-compatible high-density PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.3 V min / 14.0 V nom / 14.7 V max @ IZT = 50 µA - defines tight regulation window for reference design |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous power handling on standard PCB |
| Reverse Leakage (IR) | 0.05 µA @ VR = 10.6 V - ensures minimal quiescent current in standby mode |
| Dynamic Impedance (ZZT) | Typ. 30 Ω @ IZ = 20 mA - determines output voltage variation under load transients |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during assembly and field operation |
| Junction Temp Range | −55°C to +150°C - enables use in under-hood automotive and industrial environments |
Pinout & Package
SOD−123 plastic surface-mount package with cathode band marking; dimensions 1.60 × 2.69 × 1.16 mm; void-free thermosetting case rated UL 94 V−0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point | Connected to regulated voltage node; polarity band identifies this terminal |
| 2 (Anode) | Zener cathode connection point | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive electronics including body control modules and sensor interfaces |
| Pb−Free & RoHS compliant | Meets global environmental compliance requirements without lead-based solder compatibility issues |
| Low IZT = 50 µA | Enables stable regulation in ultra-low-power applications such as battery-backed sensors |
| Small SOD−123 footprint | Supports high-density PCB layouts where space is constrained, e.g., portable medical devices |
| Thermal derating slope | 6.7 mW/°C above 75°C ambient - allows accurate power budgeting in thermally demanding enclosures |
Applications
| Automotive Sensor Reference | Industrial Analog Front-End |
|---|---|
Use Scenario: Providing stable 14 V reference for pressure and temperature sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Shunt voltage reference regulating bias voltage for op-amp input stages and ADC reference dividers. Use Value: Maintains <±1% output stability over −40°C to +125°C ambient due to low TC and AEC−Q101 validation. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage in factory automation PLC input modules. IC Role / Device Role / Timing Role: Clamping transient energy to safe levels using controlled Zener breakdown before ESD events damage downstream logic. Use Value: Leverages 16 kV HBM ESD rating and fast response to suppress >1 kV surges within nanoseconds. |
| Portable Medical Instrumentation | Consumer Power Management |
Use Scenario: Generating precise bias for low-noise amplifiers in handheld ultrasound probe front-ends. IC Role / Device Role / Timing Role: Low-current Zener reference supplying clean DC offset to instrumentation amplifiers. Use Value: Achieves sub-µA leakage and <30 Ω dynamic impedance to minimize noise coupling into sensitive analog paths. |
Use Scenario: Regulating auxiliary supply rails in smart home hubs with multiple voltage domains. IC Role / Device Role / Timing Role: Standby-mode voltage clamp ensuring consistent logic-level thresholds across varying input voltages. Use Value: Delivers 500 mW dissipation in compact SOD−123 package, enabling dual-rail regulation without thermal derating concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4701T1G | No automotive qualification; same electrical specs and SOD−123 package | Not approved for AEC−Q101-requiring systems | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| BZX84-C15LT1G | 15 V nominal Zener; 350 mW rating; SOT−23 package; higher leakage (0.1 µA @ 12 V) | Less precise regulation and lower power margin; smaller thermal mass | Choose only if 15 V target and SOT−23 footprint are mandatory constraints |
Compared with MMSZ4701T1G and BZX84-C15LT1G, SZMMSZ4701T1G offers automotive-grade reliability and tighter Zener tolerance at 14 V, making it the preferred choice for safety-critical voltage references where long-term stability and qualification traceability are required.
Availability
SZMMSZ4701T1G is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial analog front-ends, and portable medical instrumentation requiring stable component supply and full AEC−Q101 documentation support.
Supply support for SZMMSZ4701T1G 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 specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The SZMMSZ4xxxT1G series was designed specifically for automotive and high-reliability applications requiring AEC−Q101 qualification, low leakage, and stable Zener performance across extended temperature ranges.
FAQ
What is the nominal Zener voltage of SZMMSZ4701T1G and how tightly is it specified?
The nominal Zener voltage of SZMMSZ4701T1G is 14.0 V, with a guaranteed range of 13.3 V (min) to 14.7 V (max) at IZT = 50 µA. This ±5% tolerance ensures predictable regulation behavior in precision reference designs without requiring post-production trimming.
Is SZMMSZ4701T1G qualified for automotive applications?
Yes, SZMMSZ4701T1G is AEC−Q101 qualified and PPAP capable, with manufacturing traceability and process controls meeting automotive quality standards. Its qualification covers the full −55°C to +150°C operating range and includes stress testing per AEC−Q101 requirements.
What is the maximum power dissipation of SZMMSZ4701T1G and how does it derate with temperature?
SZMMSZ4701T1G has a maximum power dissipation of 500 mW at lead temperature (TL) = 75°C. Above 75°C, it derates linearly at 6.7 mW/°C, reaching zero dissipation at approximately 149°C - a critical parameter for thermal design in enclosed automotive or industrial housings.
How does the reverse leakage current of SZMMSZ4701T1G compare to similar Zener diodes?
SZMMSZ4701T1G specifies only 0.05 µA reverse leakage at VR = 10.6 V, significantly lower than many competing 14 V Zeners (e.g., BZX84-C15LT1G at 0.1 µA @ 12 V). This ultra-low leakage preserves battery life in always-on sensor nodes and improves accuracy in high-impedance reference networks.
What package type and marking code does SZMMSZ4701T1G use?
SZMMSZ4701T1G uses the SOD−123 surface-mount package (case 425), with physical dimensions 1.60 × 2.69 × 1.16 mm. Its top-side marking is "DK", which uniquely identifies the 14 V variant within the SZMMSZ4xxxT1G family per onsemi's official marking diagram.
SZMMSZ4701T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.6 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
SZMMSZ4701T1G FAQ
1.How can I place an order for SZMMSZ4701T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ4701T1G 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 SZMMSZ4701T1G reliable?
The price and inventory of SZMMSZ4701T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ4701T1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ4701T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ4701T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ4701T1G?
SZMMSZ4701T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ4701T1G 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 SZMMSZ4701T1G?
For technical support, including SZMMSZ4701T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ4701T1G requirements.
6.How does Aetrix verify that SZMMSZ4701T1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ4701T1G 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 SZMMSZ4701T1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ4701T1G?
All SZMMSZ4701T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ4701T1G, 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 SZMMSZ4701T1G part is unused and in its original packaging.
Return procedure for SZMMSZ4701T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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