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onsemi SZMMBZ6V2ALT1
- Part No.:
- SZMMBZ6V2ALT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
SZMMBZ6V2ALT1.pdf
- Description:
- TVS DIODE 3VWM 8.7VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:21,000
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Product details
Overview
SZMMBZ6V2ALT1 from onsemi is a dual common-anode Zener diode in SOT-23 package, designed for transient overvoltage and ESD protection of two signal lines simultaneously. It features 6.2 V nominal Zener breakdown voltage (±5% tolerance), 24 W peak pulse power (1 ms), clamping voltage of 8.7 V at 2.76 A, <0.5 µA reverse leakage at 3.0 V, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SZMMBZ6V2ALT1 datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional/unidirectional configuration flexibility, IEC 61000-4-2 Level 4 (±30 kV contact) ESD rating, low clamping voltage under surge, dual-line protection density, and automotive-grade reliability validation.
Technical Context
This device integrates two monolithic Zener junctions sharing a common anode terminal (Pin 3), enabling independent protection of two signal paths-e.g., data pair or I/O + control line-with one SOT-23 footprint. Its unidirectional operation (Pins 1–3 or 2–3) supports standard TVS clamping, while bidirectional mode (Pins 1–2) provides symmetrical surge suppression without polarity constraints.
The 6.2 V nominal breakdown voltage is specified at 1 mA test current with ±5% tolerance and a temperature coefficient of ±2.80 mV/°C. Thermal resistance is 556 °C/W on FR-5 board, supporting 225 mW steady-state dissipation at 25 °C ambient, derated linearly above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VBR) | 6.2 V nominal @ 1 mA; min 5.89 V / max 6.51 V - defines precise clamping threshold for 5 V logic rail protection |
| Clamping Voltage (VC) | 8.7 V @ 2.76 A peak pulse - ensures downstream ICs see ≤8.7 V during 24 W transient events |
| Peak Pulse Power | 24 W @ 1.0 ms per Figure 6 waveform - meets IEC 61000-4-5 surge immunity requirements for industrial interfaces |
| ESD Rating | ±30 kV contact discharge per IEC 61000-4-2 Level 4 - exceeds Class 3B HBM (>16 kV) and Class C MM (>400 V) |
| Reverse Leakage (IR) | <0.5 µA @ 3.0 V - minimizes standby current in battery-powered sensor nodes and portable equipment |
| Package | SOT-23 (Case 318, Style 12) - 2.9 mm × 1.3 mm × 0.9 mm footprint enables high-density PCB layout for multi-channel interfaces |
Pinout & Package
SOT-23 package (Case 318, Style 12) with gull-wing leads; void-free thermosetting plastic case rated UL 94 V-0; maximum solder temperature 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode 1 | Connects to first protected line (e.g., USB D+); forms unidirectional Zener path with Pin 3 |
| Pin 2 | Cathode 2 | Connects to second protected line (e.g., USB D−); forms independent unidirectional Zener path with Pin 3 |
| Pin 3 | Common Anode | Shared anode node tied to ground or reference potential; enables dual-line protection in single footprint |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Protects two independent signal lines (e.g., differential pair or I/O + enable) using one SOT-23 device - reduces BOM count and PCB area by 50% vs. discrete TVS solutions |
| IEC 61000-4-2 Level 4 compliance | ±30 kV contact discharge rating - eliminates need for external ESD filters in USB, HDMI, or automotive infotainment ports |
| AEC-Q101 qualification | Validated for automotive applications including body control modules and ADAS sensor interfaces - supports PPAP documentation and zero-defect manufacturing |
| Low clamping voltage ratio (VC/VBR) | 1.40× (8.7 V / 6.2 V) - tighter than typical 1.5–1.8× ratio, preserving margin for 5 V tolerant receivers during fast transients |
| Pb-free and RoHS compliant | Meets global environmental regulations without performance trade-offs - compatible with lead-free reflow profiles and halogen-free PCB laminates |
Applications
| USB 2.0 Interface Protection | Automotive LIN Bus Transceiver |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of USB 2.0 host/device ports against ESD events during hot-plug and handling. IC Role / Device Role: Dual-line transient voltage suppressor placed between connector and USB PHY IC. Use Value: Prevents latch-up or gate oxide damage in USB transceivers by clamping surges to ≤8.7 V while occupying only 3.8 mm² PCB area. |
Use Scenario: Safeguarding LIN bus pins of automotive door modules and seat controllers against load dump and ESD in 12 V systems. IC Role / Device Role: Common-anode TVS connected between LIN line and chassis ground to suppress coupled transients. Use Value: Enables AEC-Q101-compliant design without adding discrete components - maintains LIN signal integrity with <0.5 µA leakage at 12 V bias. |
| Industrial RS-485 Transceiver Port | Medical Patient Monitor Sensor Inputs |
|
Use Scenario: Protecting differential A/B lines of isolated RS-485 transceivers in factory automation PLCs and motor drives. IC Role / Device Role: Unidirectional clamp (Pins 1–3 and 2–3) referenced to local ground, absorbing ±24 W surges per line. Use Value: Achieves IEC 61000-4-5 Level 3 immunity (1 kV surge) with no additional PCB real estate - critical for compact DIN-rail mounted modules. |
Use Scenario: Shielding analog front-end inputs (e.g., ECG, SpO₂) from electrostatic discharge during clinical handling and cable coupling. IC Role / Device Role: Bidirectional protection (Pins 1–2) across differential sensor pair, referenced to isolated analog ground. Use Value: Delivers ±30 kV contact ESD robustness while maintaining <1 pF capacitance at 0 V bias - avoids signal distortion in sub-mV biomedical signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ6V2ALT1G | Same electrical specs and SOT-23 package but lacks AEC-Q101 qualification and SZ-prefix automotive traceability | Approved for commercial/industrial use only; not suitable for automotive OEM production or PPAP submission | Select MMBZ6V2ALT1G for cost-sensitive non-automotive designs where automotive qualification is unnecessary |
| SZMMBZ6V8ALT1G | Higher 6.8 V nominal Zener voltage (min 6.46 V / max 7.14 V); identical package, ESD rating, and 24 W pulse power | Better suited for 6 V logic rails or higher-threshold protection where 6.2 V would cause premature conduction | Choose SZMMBZ6V8ALT1G when protecting circuits with 6 V supply margins or requiring tighter VBR tolerance (±5% same, but higher nominal value) |
Compared with MMBZ6V2ALT1G, SZMMBZ6V2ALT1 offers automotive-grade process control and documentation; compared with SZMMBZ6V8ALT1G, it provides lower clamping onset for 5 V systems while maintaining identical surge handling and footprint.
Availability
SZMMBZ6V2ALT1 is available at Aetrix Electronics and suitable for automotive electronics, industrial communication interfaces, and medical sensor protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SZMMBZ6V2ALT1 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, and cloud infrastructure markets.
SZMMBZ6V2ALT1 belongs to the SZMMBZxxxALT1G series of AEC-Q101-qualified dual Zener diodes engineered specifically for space-constrained automotive and industrial ESD protection applications where dual-line surge suppression is required.
FAQ
What is the Zener breakdown voltage tolerance for SZMMBZ6V2ALT1?
The SZMMBZ6V2ALT1 has a nominal Zener breakdown voltage of 6.2 V with a tolerance of ±5%, meaning the actual measured VBR falls between 5.89 V and 6.51 V when tested at 1 mA. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable protection of 5 V logic interfaces without overdesigning voltage margins.
How does the dual common-anode configuration of SZMMBZ6V2ALT1 benefit PCB layout?
The dual common-anode configuration of SZMMBZ6V2ALT1 allows two independent signal lines-such as USB D+ and D− or RS-485 A and B-to be protected using a single SOT-23 footprint. This reduces component count, saves up to 50% board area versus discrete TVS diodes, simplifies routing, and improves layout symmetry for differential signaling, making SZMMBZ6V2ALT1 ideal for compact consumer and automotive modules.
Is SZMMBZ6V2ALT1 qualified for automotive applications?
Yes, SZMMBZ6V2ALT1 is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix indicating compliance with automotive-specific site controls, change management, and traceability requirements. It is rated for operation from −55 °C to +150 °C junction temperature and validated for use in body electronics, infotainment, and sensor interface modules meeting ISO/TS 16949 quality standards.
What is the maximum clamping voltage of SZMMBZ6V2ALT1 under surge conditions?
The maximum clamping voltage (VC) of SZMMBZ6V2ALT1 is 8.7 V when subjected to its rated peak pulse current of 2.76 A (24 W, 1 ms waveform per Figure 6). This value represents the highest voltage seen at the cathode terminals during worst-case transient events, ensuring downstream 5 V ICs remain within safe operating limits even under full-rated surge stress.
Does SZMMBZ6V2ALT1 support bidirectional ESD protection?
Yes, SZMMBZ6V2ALT1 supports bidirectional protection when used between Pins 1 and 2 (cathode-to-cathode), forming a symmetrical Zener pair referenced to the common anode (Pin 3). This configuration delivers equal positive and negative clamping thresholds, making SZMMBZ6V2ALT1 suitable for AC-coupled or floating differential signals like HDMI, CAN FD, or isolated sensor outputs without polarity concerns.
SZMMBZ6V2ALT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SZMMBZ6V2ALT1 FAQ
1.How can I place an order for SZMMBZ6V2ALT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ6V2ALT1 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 SZMMBZ6V2ALT1 reliable?
The price and inventory of SZMMBZ6V2ALT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ6V2ALT1 is usually 5 days.
3.What payment methods are accepted for SZMMBZ6V2ALT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ6V2ALT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ6V2ALT1?
SZMMBZ6V2ALT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ6V2ALT1 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 SZMMBZ6V2ALT1?
For technical support, including SZMMBZ6V2ALT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ6V2ALT1 requirements.
6.How does Aetrix verify that SZMMBZ6V2ALT1 is sourced from the original manufacturer or authorized distributors?
All SZMMBZ6V2ALT1 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 SZMMBZ6V2ALT1 meets industry standards.
7.What is the process for return or replacement of SZMMBZ6V2ALT1?
All SZMMBZ6V2ALT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ6V2ALT1, 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 SZMMBZ6V2ALT1 part is unused and in its original packaging.
Return procedure for SZMMBZ6V2ALT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMBZ6V2ALT1 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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