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onsemi SZMM5Z4V7T1G
- Part No.:
- SZMM5Z4V7T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z4V7T1G.pdf
- Description:
- DIODE ZENER 4.7V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,754
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Product details
Overview
SZMM5Z4V7T1G from onsemi is a 4.7 V ±5% Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 80 Ω max Zener impedance at 5 mA test current and 3 µA max reverse leakage at 2.0 V, used for precision voltage regulation and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z4V7T1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), low-profile SOD-523 footprint (1.20 × 0.80 × 0.60 mm), AEC-Q101 qualification for automotive use, and ESD robustness (>16 kV HBM).
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at nominal 4.7 V with tight 4.4–5.0 V tolerance band. Its thermal resistance of 250 °C/W (Junction-to-Ambient) and derating slope of 4.0 mW/°C above 25 °C define safe operating limits on FR-4 PCBs.
Designed for low-capacitance operation (260 pF at 0 V, 1 MHz), it supports high-frequency noise suppression while maintaining stable regulation under transient load conditions typical in DC-DC feedback paths and I/O rail protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 4.7 V nominal, 4.4–5.0 V range at 5 mA - defines precise clamping threshold for 5 V rail stabilization |
| Power Rating | 500 mW at 25 °C - supports continuous regulation in compact handheld PCB layouts |
| Zener Impedance | 80 Ω max at IZT = 5 mA - ensures minimal voltage deviation under dynamic current changes |
| Reverse Leakage | 3 µA max at VR = 2.0 V - guarantees low standby power loss in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during automated assembly and field operation |
| Package | SOD-523 (1.20 × 0.80 × 0.60 mm) - enables placement in ultra-dense mobile and wearable PCBs |
| AEC-Q101 | Qualified - validates reliability for automotive infotainment and body control module applications |
Pinout & Package
SOD-523 surface-mount package with cathode marked by polarity band; total body dimensions 1.20 mm × 0.80 mm × 0.60 mm; mounting position unrestricted; Pb-free matte tin lead finish; MSL 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Standard Tolerance Zener | ±5% voltage accuracy at 5 mA - eliminates need for post-production trimming in cost-sensitive designs |
| Low-Profile Packaging | 0.60 mm height - allows stacking beneath connectors or under shields in slim-profile devices |
| High ESD Robustness | 16 kV HBM rating - reduces risk of field failure in unshielded consumer interfaces |
| Automotive Qualification | AEC-Q101 certified - supports deployment in under-hood and cabin electronics without additional qualification |
| Pb-Free & RoHS Compliant | 100% matte Sn finish - meets global environmental compliance requirements and reflow compatibility up to 260 °C |
Applications
| USB Port Overvoltage Protection | Smartphone Battery Charger Feedback |
|---|---|
Use Scenario: Protects USB data and power lines from transient surges during hot-plug or adapter fault events. IC Role / Device Role / Timing Role: Zener clamping element placed between VBUS and GND to limit voltage excursion to ≤5.0 V. Use Value: Prevents damage to USB transceivers and PMICs by clamping transients within 4.4–5.0 V window while drawing <3 µA leakage at idle. | Use Scenario: Stabilizes feedback voltage in buck converter ICs regulating Li-ion charging voltage. IC Role / Device Role / Timing Role: Precision shunt reference in optocoupler-based isolated feedback loop. Use Value: Maintains ±5% output regulation accuracy across temperature due to low 80 Ω Zener impedance and −3.5 mV/°C tempco. |
| Automotive Infotainment I/O Clamping | Wearable Sensor Module Rail Protection |
Use Scenario: Shields CAN/LIN interface pins and display backlight drivers from load dump and jump-start spikes. IC Role / Device Role / Timing Role: Secondary overvoltage clamp parallel to TVS diodes on 5 V supply rails. Use Value: Adds fine-grained voltage limiting at 4.7 V with AEC-Q101 reliability assurance for 15-year automotive service life. | Use Scenario: Guards low-power sensor analog front-ends (e.g., heart rate monitors) against ESD and coupling noise. IC Role / Device Role / Timing Role: Low-capacitance (260 pF) shunt regulator on 3.3 V or 5 V sensor supply line. Use Value: Suppresses RF interference without distorting sensor signal integrity due to minimal parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C4V7 | 4.7 V ±5%, SOD-323 package (1.7 × 1.3 × 0.9 mm), 300 mW rating, 100 Ω Zz | Larger footprint and lower power rating limit use in ultra-thin wearables and high-density mobile PCBs | Select when SOD-323 layout is already established and 300 mW suffices; avoid if board space or 500 mW headroom is critical |
| MMSZ4700T1G | 4.7 V ±5%, SOD-123 package (3.7 × 1.6 × 1.1 mm), 500 mW rating, 90 Ω Zz, no AEC-Q101 | 3× larger area and non-automotive qualification restrict suitability for automotive or miniaturized designs | Choose for industrial non-automotive applications where SOD-123 is preferred and AEC-Q101 is not required |
Compared with BZX584-C4V7 and MMSZ4700T1G, SZMM5Z4V7T1G uniquely combines AEC-Q101 qualification, 500 mW rating, and smallest SOD-523 footprint-enabling automotive-grade voltage clamping in space-limited layouts where alternatives either lack qualification or increase board area by ≥2.5×.
Availability
SZMM5Z4V7T1G is available at Aetrix Electronics and suitable for USB port protection, smartphone charger feedback loops, and automotive infotainment I/O clamping requiring stable component supply across production lifecycles.
Supply support for SZMM5Z4V7T1G 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.
SZMM5Z4V7T1G belongs to the MM5Z/SZMM5Z series of miniature Zener regulators designed specifically for high-density portable electronics and AEC-Q101-compliant automotive subsystems where space, reliability, and precision voltage reference are critical.
FAQ
What is the Zener voltage tolerance of SZMM5Z4V7T1G?
SZMM5Z4V7T1G has a nominal Zener voltage of 4.7 V with a tolerance of ±5%, meaning its actual breakdown voltage falls within 4.4 V to 5.0 V at 5 mA test current. This tight tolerance eliminates the need for calibration in most 5 V rail protection and reference applications, and is confirmed in the onsemi datasheet Electrical Characteristics table on page 3.
Is SZMM5Z4V7T1G qualified for automotive use?
Yes, SZMM5Z4V7T1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the onsemi datasheet under "Specification Features". The "SZ" prefix denotes automotive-grade manufacturing controls, making SZMM5Z4V7T1G suitable for under-hood and cabin electronics where extended temperature operation and long-term reliability are mandatory.
What is the maximum power dissipation of SZMM5Z4V7T1G at 75 °C ambient?
At 75 °C ambient, SZMM5Z4V7T1G's maximum power dissipation is 300 mW. This is calculated using the 4.0 mW/°C derating factor from the datasheet: 500 mW − (75 − 25) × 4.0 mW = 300 mW. This value applies to FR-4 boards with 1 cm² copper pad, per Note 1 in the Maximum Ratings table.
Does SZMM5Z4V7T1G have a specified Zener impedance at low test currents?
Yes, SZMM5Z4V7T1G specifies Zener impedance of 800 Ω max at IZK = 1 mA (knee current), in addition to 80 Ω max at IZT = 5 mA. This dual-point specification ensures predictable regulation performance both near knee and in full breakdown, supporting stable operation in low-current bias networks and precision reference circuits.
What is the reverse leakage current of SZMM5Z4V7T1G at 2.0 V?
The reverse leakage current of SZMM5Z4V7T1G is 3 µA maximum at VR = 2.0 V and TA = 25 °C, as listed in the Electrical Characteristics table on page 3 of the onsemi datasheet. This low leakage preserves battery life in always-on portable devices and ensures minimal error contribution in high-impedance feedback networks.
SZMM5Z4V7T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±6.4%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z4V7T1G FAQ
1.How can I place an order for SZMM5Z4V7T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z4V7T1G 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 SZMM5Z4V7T1G reliable?
The price and inventory of SZMM5Z4V7T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z4V7T1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z4V7T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z4V7T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z4V7T1G?
SZMM5Z4V7T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z4V7T1G 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 SZMM5Z4V7T1G?
For technical support, including SZMM5Z4V7T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z4V7T1G requirements.
6.How does Aetrix verify that SZMM5Z4V7T1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z4V7T1G 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 SZMM5Z4V7T1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z4V7T1G?
All SZMM5Z4V7T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z4V7T1G, 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 SZMM5Z4V7T1G part is unused and in its original packaging.
Return procedure for SZMM5Z4V7T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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