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onsemi MM3Z20VT1
- Part No.:
- MM3Z20VT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z20VT1.pdf
- Description:
- DIODE ZENER 20V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,972
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Product details
Overview
MM3Z20VT1 from onsemi is a 20 V, 200 mW Zener voltage regulator diode in SOD−323 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits such as portable power rails and voltage clamp stages in mobile baseband ICs.
For engineers reviewing the MM3Z20VT1 datasheet, pinout, applications, or equivalent options, this part supports low-leakage (50 nA @ 14 V), tight tolerance (±5.6% at 20 V nominal), and high ESD robustness (Class 3, >16 kV HBM) in ultra-small footprint designs requiring stable regulation under transient load conditions.
Technical Context
The MM3Z20VT1 operates as a two-terminal, cathode-anode polarized silicon Zener diode with avalanche breakdown mechanism. Its 20 V nominal Zener voltage is specified at 5 mA test current (IZT), with dynamic impedance of 55 Ω max at IZT and 100 Ω max at IZK = 0.5 mA.
Thermal performance is defined by 635 °C/W junction-to-ambient thermal resistance and 200 mW steady-state power dissipation on FR-5 board at 25 °C, derating linearly at 1.5 mW/°C above ambient. Junction temperature range spans −65 to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.2 V at IZT = 5 mA - defines clamping threshold with ±5.6% tolerance for stable reference in bias networks |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - sets maximum continuous power handling on standard PCB; derates to 155 mW at 55 °C |
| Zener Impedance (ZZT) | 55 Ω max at IZT = 5 mA - determines regulation stiffness under small-signal AC ripple conditions |
| Leakage Current (IR) | 50 nA max at VR = 14 V - ensures minimal quiescent current draw in battery-powered standby circuits |
| Capacitance (C) | 85 pF max at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering capability and signal integrity in RF-adjacent nodes |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct placement on exposed I/O lines without external ESD protection |
| Package | SOD−323 (Case 477) - 1.7 mm × 1.25 mm × 0.9 mm footprint ideal for 0402-replacement layouts in dense portable PCBs |
Pinout & Package
SOD−323 surface-mount package with cathode marked by band; body dimensions 1.7 mm × 1.25 mm × 0.9 mm; polarity: Pin 1 = Cathode, Pin 2 = Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference terminal | Connected to regulated node; reverse-biased operation requires higher potential than anode |
| 2 (Anode) | Reference ground / return path | Tied to system ground or lower-potential rail; completes conduction path during Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free SOD−323 packaging | RoHS-compliant construction with Sn-only or Pb−Sn plating; compatible with lead-free reflow profiles up to 260 °C for 10 s |
| Low-profile height | 0.9 mm max body height - avoids interference with stacked components and shields in slim handheld enclosures |
| High ESD immunity | Class 3 HBM rating (>16 kV) - eliminates need for discrete TVS in many consumer interface protection schemes |
| Tight Zener voltage tolerance | ±5.6% at 20 V nominal - reduces calibration overhead in analog sensor biasing and ADC reference divider networks |
| Stable temperature coefficient | +14.4 mV/°C - predictable drift behavior enables compensation in temperature-critical voltage references |
Applications
| Battery Voltage Monitoring | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in smart battery packs using resistive divider into microcontroller ADC. IC Role / Device Role / Timing Role: Provides precise 20 V reference point for scaling divider ratio; acts as passive clamp against charger overvoltage transients. Use Value: Enables accurate state-of-charge estimation within ±1.2% full-scale error while surviving 24 V surge events without degradation. | Use Scenario: Protecting USB 2.0 data lines and VBUS rail from accidental 12 V adapter misconnection in dual-input power systems. IC Role / Device Role / Timing Role: Zener clamp placed between VBUS and ground; conducts only when input exceeds 21.2 V, diverting fault current away from USB controller. Use Value: Limits peak VBUS to ≤21.2 V with <50 nA leakage at 5 V, preserving signal integrity and eliminating need for active OVP IC. |
| RF Front-End Bias Stabilization | Industrial Sensor Excitation Reference |
Use Scenario: Providing stable DC bias to GaAs FET amplifiers in cellular front-end modules where supply ripple must be suppressed below −60 dBc. IC Role / Device Role / Timing Role: Low-capacitance (85 pF) Zener shunt regulating local LDO input; absorbs switching noise from PMIC buck converters. Use Value: Reduces 100 kHz–10 MHz supply-induced phase noise by 8 dB compared to unregulated bias, improving EVM in LTE bands. | Use Scenario: Generating fixed excitation voltage for 350 Ω strain gauges in weigh scale load cells operating across −25 to +70 °C ambient. IC Role / Device Role / Timing Role: Precision Zener reference feeding Wheatstone bridge; temperature coefficient compensated via series resistor network. Use Value: Maintains bridge excitation stability within ±0.02% over full temperature range, enabling 16-bit resolution without digital calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B20,115 | Same 20 V nominal, 200 mW rating, but SOD-323 package with 100 Ω ZZT max (vs. 55 Ω for MM3Z20VT1); tighter ±2% tolerance | Higher regulation stiffness required in low-noise analog references; tighter tolerance preferred in metrology-grade dividers | Select BZX384-B20,115 when ZZT < 70 Ω and tolerance ≤ ±2% are mandatory; MM3Z20VT1 preferred for cost-sensitive consumer designs |
| MMSZ4684T1G | 20 V nominal, 500 mW rating in SOD-123; ZZT = 100 Ω max at 5 mA; larger 3.5 mm × 1.6 mm footprint | Higher power handling needed for sustained 10 mA clamp duty cycles; incompatible with 0402-layout density constraints | Select MMSZ4684T1G only when >300 mW transient energy absorption is required; MM3Z20VT1 remains optimal for space-limited 200 mW use cases |
Compared with BZX384-B20,115 and MMSZ4684T1G, the MM3Z20VT1 delivers best-in-class ZZT/size ratio (55 Ω in 1.7×1.25 mm) and superior ESD robustness (>16 kV HBM), making it the preferred choice for miniaturized, high-reliability voltage clamping where layout area and field survivability are critical.
Availability
MM3Z20VT1 is available at Aetrix Electronics and suitable for battery management systems, USB-C port protection, RF front-end biasing, and industrial sensor excitation circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MM3Z20VT1 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM3Z20VT1 belongs to the MM3ZxxxT1 Zener regulator family engineered for ultra-compact, high-reliability voltage reference and transient suppression in portable and high-density electronics.
FAQ
What is the Zener voltage tolerance of the MM3Z20VT1?
The MM3Z20VT1 has a Zener voltage range of 18.8 V to 21.2 V at IZT = 5 mA, corresponding to a ±5.6% tolerance around the 20 V nominal value. This tolerance is guaranteed across manufacturing lots and verified per JEDEC test methods in the official onsemi datasheet revision 7. The MM3Z20VT1 maintains this specification under standard ambient conditions (25 °C) with pulse testing to avoid self-heating effects.
Does the MM3Z20VT1 support lead-free soldering processes?
Yes, the MM3Z20VT1 is offered in a Pb−Free package (denoted by the "G" suffix) with Sn-only or Pb−Sn plating, rated for peak reflow temperatures up to 260 °C for 10 seconds. Its SOD−323 package complies with IPC/JEDEC J-STD-020 moisture sensitivity level 1 and withstands standard lead-free reflow profiles without delamination or parametric shift. The MM3Z20VT1 meets RoHS Directive 2011/65/EU requirements.
What is the maximum reverse leakage current for the MM3Z20VT1 at 14 V?
The MM3Z20VT1 exhibits a maximum reverse leakage current (IR) of 50 nA at VR = 14 V and TA = 25 °C, as specified in the Electrical Characteristics table. This low leakage enables minimal standby power loss in battery-operated devices. The MM3Z20VT1 maintains sub-100 nA leakage up to 70 °C ambient, validated through onsemi's production test screening.
Can the MM3Z20VT1 be used as a voltage reference in precision analog circuits?
The MM3Z20VT1 provides adequate stability for moderate-precision analog references (e.g., 12-bit ADC biasing), with a temperature coefficient of +14.4 mV/°C and ZZT ≤ 55 Ω. However, its ±5.6% initial tolerance and 100 Ω ZZK at 0.5 mA limit use in high-accuracy applications (<0.1% total error). For such cases, the MM3Z20VT1 serves best as a coarse clamp or pre-regulator ahead of an active reference IC.
What is the thermal resistance junction-to-ambient (RJA) for the MM3Z20VT1?
The MM3Z20VT1 has a thermal resistance of 635 °C/W from junction to ambient on FR-5 board, as stated in the Maximum Ratings table. This value assumes standard 1.0 mm² copper pad per terminal and natural convection cooling. Derating begins at 1.5 mW/°C above 25 °C ambient, reducing usable power to 125 mW at 75 °C. The MM3Z20VT1's RJA is consistent across all variants in the MM3ZxxxT1 series due to identical SOD−323 package construction.
MM3Z20VT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 200 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-323
MM3Z20VT1 FAQ
1.How can I place an order for MM3Z20VT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z20VT1 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 MM3Z20VT1 reliable?
The price and inventory of MM3Z20VT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z20VT1 is usually 5 days.
3.What payment methods are accepted for MM3Z20VT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z20VT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z20VT1?
MM3Z20VT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z20VT1 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 MM3Z20VT1?
For technical support, including MM3Z20VT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z20VT1 requirements.
6.How does Aetrix verify that MM3Z20VT1 is sourced from the original manufacturer or authorized distributors?
All MM3Z20VT1 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 MM3Z20VT1 meets industry standards.
7.What is the process for return or replacement of MM3Z20VT1?
All MM3Z20VT1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z20VT1, 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 MM3Z20VT1 part is unused and in its original packaging.
Return procedure for MM3Z20VT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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