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onsemi SZMM3Z20VT1G
- Part No.:
- SZMM3Z20VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z20VT1G.pdf
- Description:
- DIODE ZENER 20V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,740
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Product details
Overview
SZMM3Z20VT1G from onsemi is a 20 V, 300 mW Zener voltage regulator diode in SOD−323 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 20 V at 5 mA test current, with dynamic impedance of 55 Ω, leakage current ≤0.05 µA at 14.0 V reverse bias, and −3.5 mV/°C temperature coefficient.
For engineers reviewing the SZMM3Z20VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±1.2 V), low-profile SOD−323 footprint (1.7 mm × 1.25 mm × 0.9 mm), AEC−Q101 qualification, and ESD robustness (>16 kV HBM).
Technical Context
This device operates as a two-terminal voltage reference, regulating reverse-biased voltage across its cathode-anode terminals. Its Zener breakdown mechanism provides stable DC reference under steady-state conditions, with thermal derating starting at 25°C (2.4 mW/°C) and junction-to-ambient thermal resistance of 416°C/W.
The SZMM3Z20VT1G exhibits low capacitance (85 pF at 0 V, 1 MHz), making it suitable for high-frequency noise suppression. Its forward voltage is ≤0.9 V at 10 mA, and it maintains specified performance across −65°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8 V min / 20 V nom / 21.2 V max @ IZT = 5 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation | 300 mW @ TA = 25°C - sets maximum continuous power handling on FR-4 board with 1 cm² pad |
| Zener Impedance (ZZT) | 55 Ω max @ IZT = 5 mA - determines AC voltage regulation stability under small-signal variations |
| Reverse Leakage Current | ≤0.05 µA @ VR = 14.0 V - ensures minimal standby current in voltage-clamp configurations |
| Temperature Coefficient | −3.5 mV/°C - quantifies voltage drift per degree Celsius change in ambient temperature |
| Capacitance | 85 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency filtering and signal integrity in RF-adjacent circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - enables robust handling in automated assembly and end-user environments |
Pinout & Package
Package: SOD−323 (Case 477−02), surface-mount plastic package with cathode indicated by polarity band; dimensions 1.7 mm × 1.25 mm × 0.9 mm; weight 4.507 mg/unit; Pb-free, UL 94 V−0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-bias terminal | Connected to higher-potential node in Zener clamp configuration; polarity band identifies this terminal |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors requiring extended temperature and reliability compliance |
| Low profile (0.9 mm height) | Enables placement beneath connectors or in ultra-thin handheld PCBs where vertical clearance is limited to <1 mm |
| High ESD immunity (>16 kV HBM) | Eliminates need for external ESD protection in portable electronics interfaces exposed to human contact |
| Pb-free and RoHS compliant | Meets global environmental regulations and supports lead-free reflow soldering profiles up to 260°C for 10 seconds |
| Stable Zener voltage tolerance (±6%) | Reduces calibration overhead in battery-monitoring circuits where ±1.2 V absolute accuracy is sufficient |
Applications
| Battery Voltage Monitoring | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage in portable medical devices to trigger low-battery alerts before shutdown. IC Role / Device Role / Timing Role: Zener reference providing stable 20 V threshold for comparator input against scaled battery voltage. Use Value: Tight 18.8–21.2 V Zener window ensures accurate trip point without trimming resistors, reducing BOM count. |
Use Scenario: Clamping transient surges on USB 5 V lines caused by hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when line voltage exceeds 20 V. Use Value: 300 mW power rating and 55 Ω impedance enable fast clamping response with minimal voltage overshoot. |
| Automotive Sensor Reference | Industrial PLC Input Conditioning |
|
Use Scenario: Providing stable reference for analog front-end of tire pressure monitoring system (TPMS) sensors. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing in AEC−Q101-compliant sensor modules. Use Value: −3.5 mV/°C tempco and −65°C to +150°C operating range ensure consistent reference across vehicle thermal cycles. |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers from field-wiring transients. IC Role / Device Role / Timing Role: Overvoltage clamp limiting input voltage to safe levels for optocoupler or Schmitt-trigger input stages. Use Value: 85 pF capacitance avoids signal distortion on 10 kHz–100 kHz industrial control signals while absorbing 100 V spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B20,115 | 20 V Zener, 300 mW, SOD-323, but ±5% tolerance (19–21 V) vs. SZMM3Z20VT1G's ±6% (18.8–21.2 V); no AEC−Q101 rating | Targeted at commercial-grade consumer electronics, not automotive systems requiring PPAP documentation | Select when AEC−Q101 compliance is unnecessary and tighter voltage tolerance is preferred |
| MMSZ5242B-TP | 20 V Zener, 500 mW, SOD-123 package (larger footprint: 2.7 mm × 1.4 mm); higher power but incompatible pin layout | Used where higher surge energy absorption is required, such as industrial power supply feedback loops | Select when 500 mW dissipation is needed and PCB layout allows SOD-123 footprint |
Compared with BZX384-B20,115 and MMSZ5242B-TP, the SZMM3Z20VT1G uniquely combines AEC−Q101 qualification, ultra-compact SOD−323 size, and verified −3.5 mV/°C tempco-making it optimal for automotive and portable designs where space, reliability, and thermal stability are jointly constrained.
Availability
SZMM3Z20VT1G is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, automotive sensor modules, and industrial PLC input conditioning requiring stable component supply across long production lifecycles.
Supply support for SZMM3Z20VT1G 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MM3ZxxxT1G/SZMM3ZxxxT1G series was developed to deliver high-reliability, miniature Zener regulation for space-constrained, high-volume applications-including automotive ECUs, wearables, and IoT edge nodes-where AEC−Q101 compliance and low-profile packaging are mandatory.
FAQ
What is the Zener voltage tolerance of SZMM3Z20VT1G?
The SZMM3Z20VT1G has a Zener voltage specification of 18.8 V minimum, 20 V nominal, and 21.2 V maximum at IZT = 5 mA, corresponding to a ±6% tolerance around the nominal value. This tolerance is verified per the manufacturer's electrical characteristics table and applies under standard test conditions at 25°C ambient temperature.
Is SZMM3Z20VT1G suitable for automotive applications?
Yes, SZMM3Z20VT1G is AEC−Q101 qualified and PPAP capable, with full traceability and process controls required for automotive use. Its operating temperature range of −65°C to +150°C, robust ESD rating (>16 kV HBM), and certified manufacturing site compliance make it appropriate for engine control, body electronics, and ADAS sensor modules.
What is the thermal derating behavior of SZMM3Z20VT1G above 25°C?
SZMM3Z20VT1G derates linearly at 2.4 mW/°C above 25°C ambient temperature, based on its 300 mW maximum power rating on FR-4 board with 1 cm² copper pad. At 85°C ambient, its usable power drops to approximately 156 mW, calculated as 300 mW − (85 − 25) × 2.4 mW/°C.
Does SZMM3Z20VT1G have a specified forward voltage?
Yes, SZMM3Z20VT1G specifies a maximum forward voltage (VF) of 0.9 V at forward current (IF) = 10 mA, per the Electrical Characteristics table. This parameter is relevant for polarity-check circuits or dual-use configurations where the device may conduct in forward bias during power-up sequencing.
What is the package marking code for SZMM3Z20VT1G?
The SZMM3Z20VT1G is marked with "0Z" on the top surface of the SOD−323 package, as confirmed in the device marking column of the Electrical Characteristics table. The "SZ" prefix indicates automotive-grade qualification, and the "0Z" code uniquely identifies the 20 V variant within the MM3ZxxxT1G family.
SZMM3Z20VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z20VT1G FAQ
1.How can I place an order for SZMM3Z20VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z20VT1G 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 SZMM3Z20VT1G reliable?
The price and inventory of SZMM3Z20VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z20VT1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z20VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z20VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z20VT1G?
SZMM3Z20VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z20VT1G 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 SZMM3Z20VT1G?
For technical support, including SZMM3Z20VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z20VT1G requirements.
6.How does Aetrix verify that SZMM3Z20VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z20VT1G 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 SZMM3Z20VT1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z20VT1G?
All SZMM3Z20VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z20VT1G, 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 SZMM3Z20VT1G part is unused and in its original packaging.
Return procedure for SZMM3Z20VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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