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onsemi SZMM5Z4V3T1G
- Part No.:
- SZMM5Z4V3T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z4V3T1G.pdf
- Description:
- DIODE ZENER 4.3V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:18,589
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Product details
Overview
SZMM5Z4V3T1G from onsemi is a 4.3 V ±5% Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 90 Ω max Zener impedance at 5 mA test current and 3 μA max reverse leakage at 3.3 V, used for precision voltage clamping in space-constrained portable electronics.
For engineers reviewing the SZMM5Z4V3T1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (250 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and SOD-523 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference and transient clamp, leveraging silicon PN junction breakdown at precisely controlled reverse bias. Its 4.3 V nominal Zener voltage is stabilized by process-controlled doping and metallization, with temperature coefficient of −3.5 mV/°C ensuring predictable drift over −65 °C to +150 °C operating range.
The SOD-523 package enables surface-mount integration with minimal board area (1.20 mm × 0.80 mm) and low profile (0.7 mm height), while its 100% matte tin lead finish supports lead-free reflow up to 260 °C and meets MSL 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 4.0–4.6 V @ IZT = 5 mA - defines clamping threshold with ±5% tolerance for stable regulation under load |
| Power Dissipation | 500 mW @ TA = 25 °C - sets maximum continuous DC or pulsed power handling on FR-4 board |
| Zener Impedance | 90 Ω max @ IZT = 5 mA - determines output voltage stability under varying current demand |
| Reverse Leakage | 3 μA max @ VR = 3.3 V - ensures minimal standby current in low-power battery applications |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust protection against human-body electrostatic discharge events |
| Operating Temp | −65 °C to +150 °C - supports automotive under-hood and industrial ambient environments |
| Thermal Resistance | 250 °C/W (Junction-to-Ambient) - informs derating curve: 4.0 mW/°C above 25 °C ambient |
Pinout & Package
SOD-523 package: 1.20 mm × 0.80 mm body, 0.7 mm height, void-free thermosetting plastic case, matte tin leads, MSL 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; polarity band identifies cathode for correct orientation during placement |
| 2 | Anode | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control units and infotainment power rails |
| Pb-Free & RoHS Compliant | Meets global environmental regulations with 100% matte Sn lead finish and UL 94 V-0 epoxy |
| Low Capacitance | 450 pF max @ VR = 0 V, f = 1 MHz - minimizes signal distortion in high-frequency clamping |
| Small Outline | SOD-523 footprint saves >60% board area vs. SOD-123 - critical for smartphones and wearables |
Applications
| Smartphone Power Rail Protection | Automotive Infotainment USB Port Clamp |
|---|---|
Use Scenario: Clamping 5 V USB input rail against ESD transients and supply overshoot in compact smartphone mainboard designs. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fast-response voltage limiting at system power entry point. Use Value: Prevents damage to downstream PMICs and USB PHYs using only 1.20 mm × 0.80 mm board area and <3 μA leakage. | Use Scenario: Protecting USB data lines and 5 V VBUS in automotive head unit against load dump and hot-swap surges. IC Role / Device Role / Timing Role: Standby-mode Zener clamp absorbing transient energy without active control circuitry. Use Value: Enables AEC-Q101-compliant surge suppression with no additional biasing or timing components required. |
| High-Density PC Board Voltage Reference | Portable Medical Sensor Biasing |
Use Scenario: Providing stable 4.3 V reference for ADC biasing and op-amp feedback networks on multi-layer server motherboard VRM sections. IC Role / Device Role / Timing Role: Passive precision voltage source replacing larger three-terminal references where space is constrained. Use Value: Delivers ±5% tolerance and −3.5 mV/°C TC in same footprint as passive resistors, reducing BOM count. | Use Scenario: Stabilizing bias voltage for low-noise analog front-end amplifiers in handheld ECG and pulse oximeter devices. IC Role / Device Role / Timing Role: Low-leakage (<3 μA) Zener element establishing clean DC offset in battery-powered sensor chains. Use Value: Extends single-cell Li-ion battery life by minimizing quiescent current while maintaining 4.3 V accuracy across temperature. |
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-C4V3 | 4.3 V ±5%, SOD-523, 350 mW rating, 110 Ω ZZT, non-automotive grade | Lacks AEC-Q101 qualification and higher ESD rating; suitable for consumer portables only | Select when cost sensitivity outweighs automotive compliance and higher power margin is not required |
| MMSZ4V3ET1G | 4.3 V ±5%, SOD-123, 500 mW, 90 Ω ZZT, same Zener specs but 2.7× larger footprint | Compatible electrical performance but requires PCB redesign due to larger SOD-123 outline | Select only if existing layout uses SOD-123 and no space constraint exists |
Compared with BZX584-C4V3 and MMSZ4V3ET1G, SZMM5Z4V3T1G uniquely combines AEC-Q101 qualification, 500 mW power rating, and minimal SOD-523 footprint-making it optimal for next-gen automotive and ultra-compact portable designs where reliability and board area are co-constrained.
Availability
SZMM5Z4V3T1G is available at Aetrix Electronics and suitable for smartphone power rail protection, automotive infotainment USB port clamping, and high-density PC board voltage reference applications requiring stable component supply across production lifecycles.
Supply support for SZMM5Z4V3T1G 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.
SZMM5ZxxxT1G series targets space-constrained, high-reliability applications requiring certified Zener regulation-especially automotive subsystems and portable electronics needing AEC-Q101 validation and ultra-small form factor.
FAQ
What is the Zener voltage tolerance of SZMM5Z4V3T1G?
The SZMM5Z4V3T1G has a nominal Zener voltage of 4.3 V with a tolerance of ±5%, meaning the actual measured voltage falls between 4.0 V and 4.6 V at 5 mA test current and 25 °C ambient temperature. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 19, April 2025).
Is SZMM5Z4V3T1G qualified for automotive use?
Yes, SZMM5Z4V3T1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, making SZMM5Z4V3T1G suitable for under-hood and infotainment applications.
What is the maximum reverse leakage current for SZMM5Z4V3T1G?
The maximum reverse leakage current for SZMM5Z4V3T1G is 3 μA at VR = 3.3 V and TA = 25 °C, per the Electrical Characteristics table on page 3 of the onsemi datasheet. This low leakage supports extended battery life in always-on portable and medical sensor applications.
What package type does SZMM5Z4V3T1G use?
SZMM5Z4V3T1G uses the SOD-523 surface-mount package (Case 502, Style 1), measuring 1.20 mm × 0.80 mm × 0.70 mm. Its marking includes a cathode band on Pin 1, and it complies with MSL 1 and Pb-free/RoHS requirements per the Mechanical Characteristics section of the datasheet.
Does SZMM5Z4V3T1G have ESD protection capability?
Yes, SZMM5Z4V3T1G has an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as specified in the "Specification Features" section of the onsemi datasheet. This makes it suitable for direct interface with external connectors subject to frequent handling in consumer and automotive environments.
SZMM5Z4V3T1G 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):
- 4.3 V
- Tolerance:
- ±7%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 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
SZMM5Z4V3T1G FAQ
1.How can I place an order for SZMM5Z4V3T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z4V3T1G 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 SZMM5Z4V3T1G reliable?
The price and inventory of SZMM5Z4V3T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z4V3T1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z4V3T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z4V3T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z4V3T1G?
SZMM5Z4V3T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z4V3T1G 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 SZMM5Z4V3T1G?
For technical support, including SZMM5Z4V3T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z4V3T1G requirements.
6.How does Aetrix verify that SZMM5Z4V3T1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z4V3T1G 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 SZMM5Z4V3T1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z4V3T1G?
All SZMM5Z4V3T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z4V3T1G, 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 SZMM5Z4V3T1G part is unused and in its original packaging.
Return procedure for SZMM5Z4V3T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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