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onsemi MM5Z20VT1G
- Part No.:
- MM5Z20VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z20VT1G.pdf
- Description:
- DIODE ZENER 20V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MM5Z20VT1G from onsemi is a 20 V, ±5% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 55 Ω maximum Zener impedance at 1 mA test current and 0.05 μA reverse leakage at 14.4 V. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rails and USB interface protection circuits.
For engineers reviewing the MM5Z20VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 20 V nominal Zener voltage, SOD-523 footprint compatibility, 16 kV HBM ESD rating, thermal resistance of 250 °C/W, and automotive-grade AEC-Q101 qualification when ordered as SZ variant.
Technical Context
This device operates as a two-terminal voltage reference using controlled reverse-biased avalanche breakdown. Its 20 V nominal Zener voltage is specified at IZT = 1 mA with ±5% tolerance, and it maintains stable regulation across −65 °C to +150 °C junction temperature range.
The SOD-523 package enables high-density PCB layouts with 1.20 mm × 0.80 mm body outline and 0.7 mm max height. Thermal derating begins above 25 °C at 4.0 mW/°C, supporting reliable operation under transient power loads in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.2 V @ IZT = 1 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 500 mW @ TA = 25 °C - sets maximum continuous DC power handling on FR-4 board |
| Zener Impedance (ZZT) | 55 Ω max @ IZT = 1 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage (IR) | 0.05 μA @ VR = 14.4 V - ensures minimal standby current in undervoltage clamp configurations |
| ESD Rating | Class 3 (>16 kV) HBM - qualifies for direct integration into handheld device I/O lines without external protection |
| Package | SOD-523 (Case 502) - 1.20 mm × 0.80 mm × 0.70 mm footprint compatible with 0402-class pick-and-place equipment |
| Temperature Coefficient | ±14.0 mV/°C @ IZT - quantifies VZ drift over operating temperature range |
Pinout & Package
SOD-523 surface-mount package with cathode marked by polarity band; body dimensions 1.20 mm × 0.80 mm × 0.70 mm; lead finish 100% matte tin; MSL 1 rated for 260 °C reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage rail; reverse-bias terminal where Zener breakdown occurs |
| 2 (Unbanded End) | Anode | Connected to circuit ground or lower-potential node; completes bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables robust overvoltage clamping in 3.3 V–5 V system rails without thermal runaway under sustained fault conditions |
| ±5% Zener Tolerance | Supports deterministic voltage threshold setting in precision reference and feedback divider networks |
| 16 kV HBM ESD Rating | Eliminates need for discrete TVS diodes on exposed ports in consumer handheld designs |
| AEC-Q101 Qualified Variant | Allows drop-in use in automotive infotainment and ADAS subsystems when ordered as SZMM5Z20VT1G |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements for commercial and industrial end equipment |
Applications
| Smartphone Power Rail Protection | USB Interface Voltage Clamp |
|---|---|
|
Use Scenario: Clamping transient surges on 5 V USB VBUS line during hot-plug events in mobile accessories. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing excess energy above 20 V threshold. Use Value: Prevents damage to USB PHY ICs by limiting peak voltage to ≤21.2 V while drawing <0.05 μA at normal operating voltage. |
Use Scenario: Stabilizing reference voltage for ADC input scaling in portable medical sensors. IC Role / Device Role / Timing Role: Precision voltage reference source providing stable 20 V node for ratiometric measurements. Use Value: Delivers ±5% accuracy and <55 Ω dynamic impedance to maintain signal integrity across temperature and load variations. |
| High-Density PC Board Voltage Reference | Automotive Infotainment ESD Protection |
|
Use Scenario: Generating local 20 V bias for op-amp supply in compact IoT gateway modules. IC Role / Device Role / Timing Role: Low-profile Zener diode replacing bulkier TO-236 alternatives in 0402-compatible layouts. Use Value: Saves >60% board area versus SOD-123 while maintaining 500 mW power handling and 250 °C/W thermal resistance. |
Use Scenario: Protecting HDMI and LVDS display interfaces in automotive head units against ESD events. IC Role / Device Role / Timing Role: High-ESD-tolerance shunt clamp placed directly at connector entry point. Use Value: Withstands >16 kV HBM strikes and operates reliably from −40 °C to +125 °C ambient per AEC-Q101 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20 | 20 V, ±5%, 300 mW in SOD-523; higher ZZT (100 Ω) and lower PD | Limited to low-power signal-level clamping; unsuitable for sustained 500 mW dissipation | Select MM5Z20VT1G when full 500 mW derated operation or tighter thermal resistance (<250 °C/W) is required. |
| MMSZ5249BS | 20 V, ±5%, 500 mW in SOD-123; larger 2.7 mm × 1.7 mm footprint | Requires PCB layout revision due to incompatible pad geometry and 3× larger area | Choose MM5Z20VT1G for new designs targeting ultra-compact 0402-equivalent footprints without sacrificing power rating. |
Compared with BZX584C20 and MMSZ5249BS, MM5Z20VT1G uniquely combines 500 mW power rating, 55 Ω Zener impedance, and SOD-523 size-enabling high-density voltage regulation where thermal performance and board space are simultaneously constrained.
Availability
MM5Z20VT1G is available at Aetrix Electronics and suitable for smartphone power rail protection, USB interface voltage clamping, and high-density PC board voltage reference applications requiring stable component supply and consistent parametric performance.
Supply support for MM5Z20VT1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM5ZxxxT1G series was designed specifically for space-constrained voltage regulation and ESD protection in portable electronics, emphasizing ultra-small SOD-523 packaging, high ESD immunity, and tight Zener tolerance.
FAQ
What is the Zener voltage tolerance of MM5Z20VT1G?
The MM5Z20VT1G has a nominal Zener voltage of 20 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 18.8 V and 21.2 V when tested at IZT = 1 mA and TA = 25 °C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 19, April 2025). The MM5Z20VT1G maintains this specification across its qualified operating temperature range.
Is MM5Z20VT1G suitable for automotive applications?
The MM5Z20VT1G itself is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMM5Z20VT1G is fully AEC-Q101 qualified and PPAP capable. Both share identical electrical specifications and SOD-523 packaging, but only the SZ-prefix version meets automotive reliability and traceability requirements. For non-automotive designs, MM5Z20VT1G delivers identical Zener performance with standard commercial qualification.
What is the maximum reverse leakage current for MM5Z20VT1G?
The MM5Z20VT1G exhibits a maximum reverse leakage current (IR) of 0.05 μA when biased at 14.4 V, as specified in the Electrical Characteristics table. This low leakage ensures minimal quiescent current draw in voltage reference and clamp circuits, preserving battery life in portable devices. The value is measured at TA = 25 °C and applies to all units within the MM5Z20VT1G production lot.
Does MM5Z20VT1G have an ESD rating, and if so, what is it?
Yes, MM5Z20VT1G is rated for Class 3 human body model (HBM) ESD protection with a minimum withstand level of >16 kV. This rating is explicitly stated in the Specification Features section of the onsemi datasheet and verified per JESD22-A114. The high ESD immunity allows direct placement on I/O lines in handheld electronics without additional protection components.
What is the thermal resistance (RJA) of MM5Z20VT1G on FR-4 board?
The MM5Z20VT1G has a junction-to-ambient thermal resistance (RJA) of 250 °C/W when mounted on a single-sided FR-4 PCB with a 1 cm² copper pad, as defined in the Maximum Ratings table. This value governs thermal derating: power dissipation must be reduced by 4.0 mW per °C above 25 °C ambient to prevent exceeding the 150 °C maximum junction temperature.
MM5Z20VT1G 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):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z20VT1G FAQ
1.How can I place an order for MM5Z20VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z20VT1G 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 MM5Z20VT1G reliable?
The price and inventory of MM5Z20VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z20VT1G is usually 5 days.
3.What payment methods are accepted for MM5Z20VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z20VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z20VT1G?
MM5Z20VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z20VT1G 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 MM5Z20VT1G?
For technical support, including MM5Z20VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z20VT1G requirements.
6.How does Aetrix verify that MM5Z20VT1G is sourced from the original manufacturer or authorized distributors?
All MM5Z20VT1G 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 MM5Z20VT1G meets industry standards.
7.What is the process for return or replacement of MM5Z20VT1G?
All MM5Z20VT1G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z20VT1G, 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 MM5Z20VT1G part is unused and in its original packaging.
Return procedure for MM5Z20VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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