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onsemi MM5Z20VT1
- Part No.:
- MM5Z20VT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z20VT1.pdf
- Description:
- DIODE ZENER 20V 100MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,362
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Product details
Overview
MM5Z20VT1 from onsemi is a 20 V, 100 mW Zener diode in SOD−523 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 20 V at 2 mA test current, with ±1.2 V tolerance (18.8–21.2 V), 55 Ω dynamic impedance at IZT, and 0.05 µA reverse leakage at 14 V. It is used in voltage reference and ESD-sensitive signal line clamping in portable electronics.
For engineers reviewing the MM5Z20VT1 datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, SOD−523 terminal mapping, real-world use cases in handheld power rails and I/O protection, and two validated alternative Zeners with documented parameter differences.
Technical Context
The MM5Z20VT1 operates as a two-terminal silicon Zener diode optimized for stable reverse-bias breakdown regulation. Its 20 V nominal Zener voltage is specified at IZT = 2 mA, with temperature coefficient of +14.4 mV/°C and maximum Zener impedance of 55 Ω at that current.
It features Class 3 ESD rating (>16 kV HBM), low capacitance (85 pF at 0 V, 1 MHz), and thermal stability across −65 °C to +150 °C junction temperature range. The device is rated for 100 mW steady-state dissipation on FR-5 board at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.2 V at IZT = 2 mA - defines regulated output voltage window under nominal bias |
| Power Dissipation (PD) | 100 mW at TA = 25 °C - limits continuous power handling on standard PCB |
| Zener Impedance (ZZT) | 55 Ω max at IZT = 2 mA - determines regulation stiffness and output ripple rejection |
| Reverse Leakage (IR) | 0.05 µA max at VR = 14 V - ensures minimal quiescent current in standby clamp configurations |
| Capacitance (C) | 85 pF at VR = 0 V, f = 1 MHz - impacts high-frequency signal integrity in data line protection |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for direct interface with user-accessible ports in consumer devices |
| Package | SOD−523 (Case 502) - 1.20 × 0.80 × 0.70 mm body enables ultra-dense placement on mobile PCBs |
Pinout & Package
SOD−523 surface-mount package with cathode band marking; 2-terminal construction; mounting position unrestricted; qualified for 260 °C reflow per J-STD-020 MSL 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side Zener terminal | Connected to regulated node or protected signal line; reverse-biased during clamping |
| 2 (Anode) | Low-side Zener terminal | Typically tied to ground or lower-potential rail; completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Stable 20 V regulation | Nominal 20 V Zener voltage with tight ±1.2 V tolerance supports accurate reference generation |
| Ultra-small footprint | 1.20 mm × 0.80 mm SOD−523 outline saves >60% board area vs. SOD-123 in portable designs |
| Low leakage performance | 0.05 µA max reverse current at 14 V enables battery-critical low-power standby operation |
| High ESD robustness | Class 3 (>16 kV HBM) rating eliminates need for external ESD diodes on USB/UART lines |
| Thermal reliability | −65 °C to +150 °C operating range supports automotive cabin and industrial edge deployments |
Applications
| Smartphone Power Rail Clamping | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Clamp transient spikes on 3.3 V LDO output feeding RF transceiver ICs. IC Role / Device Role / Timing Role: Zener voltage clamp limiting overshoot to ≤21.2 V during load dump or hot-swap events. Use Value: Prevents permanent damage to sensitive 20 V absolute-maximum-rated RF front-end components without adding series resistance. |
Use Scenario: Protect D+ and D− lines from ESD events during cable insertion in portable accessories. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed directly at connector, leveraging low 85 pF capacitance. Use Value: Maintains USB 2.0 signal integrity (≤480 Mbps) while passing IEC 61000-4-2 Level 4 (±15 kV air) testing. |
| Wearable Sensor Reference | Industrial I/O Module Protection |
Use Scenario: Provide stable 20 V reference for analog-to-digital conversion in compact health-monitoring patches. IC Role / Device Role / Timing Role: Precision shunt regulator supplying excitation voltage to bridge-based strain sensors. Use Value: Enables <±0.5% full-scale accuracy in 16-bit ADC systems via low-tempco (+14.4 mV/°C) and low-Z regulation. |
Use Scenario: Guard 24 V PLC input channels against induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp before optocoupler input stage in DIN-rail mounted I/O modules. Use Value: Absorbs 100 mW transients without derating, extending system uptime versus higher-power alternatives requiring heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20 | Same 20 V nominal, but 350 mW PD, SOD-323 package (1.7 × 1.3 mm), ZZT = 40 Ω @ 5 mA | Higher power handling suits 24 V industrial rails; larger footprint limits use in sub-10 mm² wearables | Select when >100 mW surge energy must be absorbed; verify PCB layout accommodates 40% larger body |
| MMSZ5249B | 20 V nominal, 500 mW PD, SOD-123 package (3.7 × 1.6 mm), ZZT = 23 Ω @ 20 mA | Lower impedance improves regulation under varying loads; 3× larger size precludes ultra-dense layouts | Prefer for high-accuracy analog references where board space permits; avoid in smartphone camera modules |
Compared with BZX584C20 and MMSZ5249B, the MM5Z20VT1 offers the smallest footprint and lowest system-level capacitance for high-speed interfaces, while trading off absolute power handling and low-Z regulation-making it optimal for miniaturized, battery-powered applications where space and signal integrity dominate.
Availability
MM5Z20VT1 is available at Aetrix Electronics and suitable for smartphone power rail clamping, USB data line protection, and wearable sensor reference applications requiring stable component supply and consistent SOD−523 packaging.
Supply support for MM5Z20VT1 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MM5Z20VT1 belongs to the MM5ZxxxT1 Zener regulator family, engineered specifically for miniaturized voltage reference and ESD protection in portable electronics where board area and signal integrity are critical constraints.
FAQ
What is the Zener voltage tolerance of MM5Z20VT1?
The MM5Z20VT1 has a guaranteed Zener voltage range of 18.8 V to 21.2 V at IZT = 2 mA and TA = 25 °C, corresponding to ±1.2 V (±6%) tolerance around the 20 V nominal value. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 2, July 2004). The MM5Z20VT1 maintains this specification across its qualified operating temperature range.
Does MM5Z20VT1 support automated SMT assembly?
Yes, the MM5Z20VT1 is qualified for lead-free reflow soldering up to 260 °C peak temperature and meets J-STD-020 Moisture Sensitivity Level 1 (MSL 1), meaning it can be stored indefinitely at ≤30 °C/60% RH without baking. Its SOD−523 package uses 100% matte tin plating and is supplied in 3000-piece tape-and-reel format compatible with standard pick-and-place equipment. The MM5Z20VT1 is fully suited for high-volume automated manufacturing.
What is the maximum reverse leakage current for MM5Z20VT1?
The MM5Z20VT1 specifies a maximum reverse leakage current (IR) of 0.05 µA at VR = 14 V and TA = 25 °C. This ultra-low leakage is critical for battery-powered applications where standby current must be minimized. The value is measured and guaranteed per the Electrical Characteristics table in the official onsemi datasheet. No higher leakage is permitted for compliant MM5Z20VT1 units.
Can MM5Z20VT1 be used for bidirectional ESD protection?
No-the MM5Z20VT1 is a unidirectional Zener diode with defined anode and cathode terminals; it conducts only in reverse breakdown (cathode positive relative to anode). For bidirectional ESD protection (e.g., on USB D+/D−), two MM5Z20VT1 devices must be connected in series opposition, or a dedicated bidirectional TVS like ESD9X5.0ST5G should be selected. The MM5Z20VT1 datasheet does not specify forward conduction beyond VF = 0.9 V @ 10 mA, confirming its primary design intent is reverse-bias regulation.
What is the thermal resistance junction-to-ambient for MM5Z20VT1?
The MM5Z20VT1 does not specify a numerical junction-to-ambient thermal resistance (RθJA) in its datasheet because its 100 mW power rating is defined empirically on FR-5 board at TA = 25 °C-not derived from RθJA. The device's small SOD−523 package inherently limits heat dissipation; derating is required above 25 °C ambient per the "Derating Curve" note in the Maximum Ratings section. Designers must rely on the 100 mW limit at 25 °C and linear derating beyond that point when using MM5Z20VT1 in thermally constrained environments.
MM5Z20VT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 100 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
MM5Z20VT1 FAQ
1.How can I place an order for MM5Z20VT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z20VT1 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 MM5Z20VT1 reliable?
The price and inventory of MM5Z20VT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z20VT1 is usually 5 days.
3.What payment methods are accepted for MM5Z20VT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z20VT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z20VT1?
MM5Z20VT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z20VT1 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 MM5Z20VT1?
For technical support, including MM5Z20VT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z20VT1 requirements.
6.How does Aetrix verify that MM5Z20VT1 is sourced from the original manufacturer or authorized distributors?
All MM5Z20VT1 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 MM5Z20VT1 meets industry standards.
7.What is the process for return or replacement of MM5Z20VT1?
All MM5Z20VT1 units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z20VT1, 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 MM5Z20VT1 part is unused and in its original packaging.
Return procedure for MM5Z20VT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z20VT1 Tags
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