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onsemi MM5Z20VT5G
- Part No.:
- MM5Z20VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z20VT5G.pdf
- Description:
- DIODE ZENER 20V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:15,850
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Product details
Overview
MM5Z20VT5G 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 5 mA test current and 0.05 μA reverse leakage at 14 V, used for precision voltage regulation and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the MM5Z20VT5G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (20 V), tolerance (±5%), power rating (500 mW), thermal resistance (250 °C/W), and ESD robustness (Class 3, >16 kV HBM).
Technical Context
This device operates as a two-terminal voltage reference by maintaining a stable reverse breakdown voltage across its anode–cathode junction under controlled current conditions. It exhibits a positive temperature coefficient of +14.0 mV/°C at IZT, enabling predictable drift compensation in bias networks.
The SOD-523 package supports high-density PCB layouts with 1.20 mm × 0.80 mm footprint and 0.7 mm body height, while its 100% matte tin lead finish ensures compatibility with Pb-free reflow profiles up to 260 °C and meets MSL 1 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, min 18.8 V / max 21.2 V at 5 mA - defines regulated output voltage under standard test conditions |
| Tolerance | ±5% - determines absolute accuracy band for voltage reference applications |
| Power Rating | 500 mW at TA = 25 °C, derates 4.0 mW/°C above - sets maximum continuous dissipation on FR-4 board |
| Zener Impedance | 55 Ω max at IZT = 5 mA - indicates dynamic resistance affecting regulation stability under load transients |
| Reverse Leakage | 0.05 μA max at VR = 14 V - critical for low-power standby circuits where quiescent current must be minimized |
| ESD Rating | Class 3 (>16 kV) per HBM - ensures robustness against handling-induced electrostatic discharge in assembly |
| Capacitance | 85 pF max at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent designs |
Pinout & Package
SOD-523 surface-mount package: 1.20 mm × 0.80 mm body outline, 0.7 mm height, void-free thermosetting plastic case meeting UL 94 V-0, matte tin lead finish, MSL 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; polarity band identifies cathode for correct PCB orientation |
| 2 | Anode | Connected to ground or lower-potential rail; current flows anode-to-cathode during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOD-523 footprint | Enables placement in <1.0 mm² board area - essential for miniaturized wearables and ultra-thin mobile modules |
| 500 mW power capability in miniature package | Delivers higher regulation headroom than comparable 200–300 mW micro-SMD Zeners without increasing layout area |
| +14.0 mV/°C tempco at 20 V | Allows predictable thermal drift modeling in temperature-compensated reference dividers or bias generators |
| Class 3 HBM ESD immunity | Eliminates need for external ESD protection in handheld product front-end interfaces exposed to user handling |
| Pb-free and RoHS-compliant construction | Meets global environmental compliance mandates without requiring special soldering process deviations |
Applications
| Battery Voltage Monitoring | USB-C Port Protection |
|---|---|
Use Scenario: Monitoring Li-ion battery pack voltage in smart earbuds to trigger low-battery shutdown before deep discharge. IC Role / Device Role / Timing Role: Zener clamp referenced to system ground provides fixed threshold for comparator input. Use Value: 20 V rating allows safe margin above 8.4 V max pack voltage; ±5% tolerance ensures consistent trip point across production units. | Use Scenario: Clamping transient surges on USB-C CC lines during hot-plug events in portable docking stations. IC Role / Device Role / Timing Role: Fast-response shunt element diverting ESD or inductive spikes away from USB controller pins. Use Value: 16 kV HBM rating withstands repeated human-body discharges; 85 pF capacitance avoids signal integrity degradation on 5 Gbps CC signaling. |
| Low-Power Sensor Biasing | Industrial IoT Node Reference |
Use Scenario: Providing stable 20 V bias to MEMS pressure sensor bridge in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Precision voltage reference source for Wheatstone bridge excitation. Use Value: 0.05 μA leakage preserves multi-year battery life; +14 mV/°C tempco enables software-based drift correction using onboard temperature sensor. | Use Scenario: Generating local 20 V reference for analog front-end of LoRaWAN node measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Primary voltage regulation stage feeding LDO input in isolated sensor interface circuit. Use Value: 500 mW rating supports 10 mA LDO input current; SOD-523 size fits within tight spacing constraints of 2-layer PCB design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20LT1G | Same 20 V nominal, ±5% tolerance, but in SOT-23 package (2.9 mm × 1.3 mm); 350 mW power rating | Larger footprint and lower power limit restrict use in ultra-dense layouts or higher-current regulation | Select when board space permits larger package and thermal management favors SOT-23's higher thermal mass |
| MMSZ5242BT1G | 20 V nominal, ±5%, SOD-123 package (3.7 mm × 1.6 mm); 500 mW rating but 100 Ω ZZT vs. 55 Ω | Higher dynamic impedance reduces regulation accuracy under fast load steps; larger size limits miniaturization | Choose if legacy SOD-123 footprint compatibility is required and tighter Zener impedance is not critical |
Compared with BZX584C20LT1G and MMSZ5242BT1G, MM5Z20VT5G delivers superior power density (500 mW in 0.96 mm² vs. 350 mW in 3.77 mm² and 500 mW in 5.92 mm²) and lowest Zener impedance among SMD 20 V Zeners in its class, making it optimal for space- and performance-constrained designs.
Availability
MM5Z20VT5G is available at Aetrix Electronics and suitable for battery monitoring, USB-C protection, low-power sensor biasing, and industrial IoT node reference applications requiring stable component supply and full traceability.
Supply support for MM5Z20VT5G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MM5ZxxxT5G series is designed for compact, high-reliability voltage regulation in portable and space-constrained electronics, emphasizing small-footprint packaging, robust ESD performance, and tight parametric control.
FAQ
What is the Zener voltage tolerance of MM5Z20VT5G?
The MM5Z20VT5G has a standard tolerance of ±5%, meaning its measured Zener voltage at 5 mA test current falls between 18.8 V and 21.2 V at 25 °C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 19, April 2025), and applies specifically to the MM5Z20VT5G variant-not the broader MM5Zxxx family.
Does MM5Z20VT5G support Pb-free reflow soldering?
Yes, MM5Z20VT5G is Pb-free and RoHS compliant, with a 100% matte tin lead finish qualified for peak reflow temperatures up to 260 °C. It meets JEDEC J-STD-020 MSL 1 requirements, allowing unlimited floor life and single reflow without preconditioning-verified in the Mechanical Characteristics section of the onsemi datasheet.
What is the maximum reverse leakage current for MM5Z20VT5G?
The maximum reverse leakage current for MM5Z20VT5G is 0.05 μA at VR = 14 V and TA = 25 °C, as specified in the Electrical Characteristics table. This value is critical for ultra-low-power applications such as multi-year battery-operated sensors, where even nanoamp-level leakage affects operational lifetime.
How does the temperature coefficient affect MM5Z20VT5G performance?
MM5Z20VT5G has a temperature coefficient of +14.0 mV/°C at IZT = 5 mA, meaning its Zener voltage increases by approximately 14 mV per degree Celsius rise in junction temperature. This linear drift is documented in the Electrical Characteristics table and must be accounted for in precision reference designs operating across −40 °C to +125 °C ambient ranges.
Is MM5Z20VT5G suitable for ESD protection in handheld devices?
Yes, MM5Z20VT5G is rated Class 3 (>16 kV) per Human Body Model (HBM), making it suitable for primary or secondary ESD clamping in handheld devices like smartphones and wearables. Its robustness is validated in the Specification Features section and eliminates the need for additional discrete TVS components in many front-end interface protection schemes.
MM5Z20VT5G 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z20VT5G FAQ
1.How can I place an order for MM5Z20VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z20VT5G 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 MM5Z20VT5G reliable?
The price and inventory of MM5Z20VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z20VT5G is usually 5 days.
3.What payment methods are accepted for MM5Z20VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z20VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z20VT5G?
MM5Z20VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z20VT5G 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 MM5Z20VT5G?
For technical support, including MM5Z20VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z20VT5G requirements.
6.How does Aetrix verify that MM5Z20VT5G is sourced from the original manufacturer or authorized distributors?
All MM5Z20VT5G 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 MM5Z20VT5G meets industry standards.
7.What is the process for return or replacement of MM5Z20VT5G?
All MM5Z20VT5G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z20VT5G, 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 MM5Z20VT5G part is unused and in its original packaging.
Return procedure for MM5Z20VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z20VT5G Tags
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