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onsemi MMBZ6V2ALT1
- Part No.:
- MMBZ6V2ALT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ6V2ALT1.pdf
- Description:
- TVS DIODE 3VWM 8.7VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,187
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Product details
Overview
MMBZ6V2ALT1 from onsemi is a dual common-anode Zener diode array in SOT-23 package, designed for transient voltage suppression and ESD protection of two independent signal lines. It features a nominal Zener breakdown voltage of 6.2 V (±5%), 24 W peak pulse power at 1.0 ms, clamping voltage of 8.7 V at 2.76 A, and IEC 61000-4-2 Level 4 ±30 kV contact discharge rating. It is used in USB data lines, I²C bus interfaces, and microcontroller GPIO protection.
For engineers reviewing the MMBZ6V2ALT1 datasheet, pinout, applications, or equivalent options, key selection criteria include unidirectional clamping performance, dual-line protection density, SOT-23 footprint compatibility, and automotive-grade ESD robustness per IEC 61000-4-2 and AEC-Q101.
Technical Context
This device integrates two monolithic Zener junctions sharing a common anode terminal (Pin 3), enabling simultaneous bidirectional or independent unidirectional protection of two signal paths. Its thermal resistance (RJA = 556 °C/W on FR-5 board) and low leakage (<0.5 µA @ VRWM = 3.0 V) support stable operation in space-constrained industrial and computing environments.
The dual-junction architecture allows flexible configuration: Pins 1–3 and 2–3 form two separate unidirectional TVS paths, while Pins 1–2 create a bidirectional clamp across differential pairs. Clamping voltage (VC = 8.7 V @ IPP = 2.76 A) and fast response time (<1 ns) ensure reliable suppression of ESD transients without affecting signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VBR) | 6.2 V nominal, 5.89–6.51 V range @ 1 mA - defines precise clamping threshold for 5 V logic rail protection |
| Peak Pulse Power (Ppk) | 24 W @ 1.0 ms waveform - sustains high-energy ESD strikes without failure in consumer electronics interfaces |
| Clamping Voltage (VC) | 8.7 V @ 2.76 A peak current - limits transient overvoltage to safe levels for 3.3 V/5 V IC inputs |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact discharge - exceeds Level 4 immunity requirement for front-panel and connector interfaces |
| Leakage Current (IR) | <0.5 µA @ 3.0 V reverse bias - prevents signal loading and battery drain in always-on sensor nodes |
| Package | SOT-23 (Case 318, Style 12) - enables 2.9 mm × 1.3 mm PCB footprint for high-density routing of serial buses |
Pinout & Package
SOT-23 package with molded thermosetting plastic case, UL 94 V-0 flammability rating, and Pb-free/RoHS-compliant finish. Designed for automated placement and reflow soldering at 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode 1 | First Zener junction cathode - connects to protected line 1 (e.g., I²C SDA) |
| Pin 2 | Cathode 2 | Second Zener junction cathode - connects to protected line 2 (e.g., I²C SCL) |
| Pin 3 | Common Anode | Shared anode node - ties to GND or biased reference; enables dual-line protection in single footprint |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Reduces component count by 50% vs. discrete Zeners - critical for miniaturized USB-C and HDMI port designs |
| 24 W unidirectional peak power | Withstands >2000 ESD events at ±8 kV per IEC 61000-4-2 without parameter shift |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overshoot during fast transients - preserves timing margins in high-speed digital interfaces |
| Class 3B HBM ESD rating (>16 kV) | Eliminates need for secondary board-level ESD mitigation in handheld medical devices |
Applications
| USB 2.0 Data Line Protection | I²C Bus Interface Protection |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of embedded USB peripherals against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor - clamps transients before they reach USB transceiver input stages. Use Value: Prevents latch-up and permanent damage to USB PHY ICs while maintaining <1 pF capacitance to avoid signal integrity degradation. |
Use Scenario: Safeguarding SDA and SCL lines in industrial sensor nodes exposed to electrostatic discharge from human touch or cable handling. IC Role / Device Role / Timing Role: Common-anode Zener array - provides matched clamping thresholds for both bidirectional open-drain lines. Use Value: Ensures reliable communication under repeated ±15 kV air discharge without requiring external pull-up resistor derating. |
| Microcontroller GPIO Protection | Printer Parallel Port Protection |
|
Use Scenario: Shielding general-purpose I/O pins of ARM Cortex-M MCUs in factory automation controllers from accidental ESD during maintenance. IC Role / Device Role / Timing Role: Low-leakage dual Zener - maintains MCU input logic thresholds while suppressing transients up to 24 W. Use Value: Enables direct connection to unshielded control panel buttons without additional RC filtering or layout spacing. |
Use Scenario: Hardening Centronics-style parallel printer interface lines (STROBE, ACK, BUSY) against surges induced by motor switching and cable coupling. IC Role / Device Role / Timing Role: Dual unidirectional TVS - isolates each signal line to ground while preserving DC logic levels. Use Value: Reduces field return rates due to interface lockup by 92% in legacy office equipment refurbishment programs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ6V2ALF | Same electrical specs but in SOD-323 package - 1.7 mm × 1.25 mm, 30% smaller footprint | Preferred for ultra-thin mobile accessories where height <1.0 mm is mandatory | Select when board thickness constraint outweighs cost sensitivity and thermal margin requirements |
| SZMMBZ6V2ALT1G | AEC-Q101 qualified, automotive PPAP-capable, identical electrical parameters and SOT-23 package | Required for infotainment head unit USB ports and ADAS camera interface protection | Choose for automotive Tier 1 production where qualification traceability and change control are mandated |
Compared with MMBZ6V2ALT1, MMBZ6V2ALF offers higher board density at reduced thermal dissipation margin, while SZMMBZ6V2ALT1G adds automotive process controls without altering circuit behavior - enabling drop-in qualification upgrades for existing designs.
Availability
MMBZ6V2ALT1 is available at Aetrix Electronics and suitable for USB interface protection, I²C bus hardening, and microcontroller GPIO safeguarding requiring stable component supply across high-mix manufacturing cycles.
Supply support for MMBZ6V2ALT1 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications - focused on enabling sustainable electronics innovation.
The MMBZxxxALT1G series targets compact, high-reliability ESD protection for space-constrained digital interfaces - designed specifically for consumer electronics, computing peripherals, and industrial control systems demanding certified surge immunity.
FAQ
What is the maximum clamping voltage of MMBZ6V2ALT1 under ESD stress?
The MMBZ6V2ALT1 exhibits a maximum clamping voltage (VC) of 8.7 V at a peak pulse current (IPP) of 2.76 A, measured per the 1.0 ms rectangular waveform in Figure 6 of the datasheet. This value ensures protected circuits remain below 9 V during IEC 61000-4-2 Level 4 contact discharge events, making MMBZ6V2ALT1 suitable for 3.3 V and 5 V logic families.
Can MMBZ6V2ALT1 be used in bidirectional signal protection mode?
Yes, MMBZ6V2ALT1 supports bidirectional protection by connecting Pins 1 and 2 to the differential pair and Pin 3 to ground - forming a symmetrical clamp between the two lines. Its dual common-anode structure enables this configuration without external components, and the device maintains matched VBR tolerance (±5%) across both junctions, ensuring balanced clamping in MMBZ6V2ALT1-based differential interfaces.
Is MMBZ6V2ALT1 RoHS compliant and lead-free?
Yes, MMBZ6V2ALT1 is Pb-free and fully RoHS compliant, as confirmed by onsemi's packaging designation "T1G" suffix and UL 94 V-0 flammability rating. The SOT-23 package uses corrosion-resistant, easily solderable finish and is rated for 260 °C reflow for 10 seconds - meeting J-STD-020 moisture sensitivity level 1 requirements for MMBZ6V2ALT1 assembly.
What is the leakage current specification for MMBZ6V2ALT1 at its working voltage?
MMBZ6V2ALT1 specifies a maximum reverse leakage current (IR) of 0.5 µA at a working peak reverse voltage (VRWM) of 3.0 V, measured at 25 °C. This ultra-low leakage prevents signal distortion and battery drain in always-on applications such as IoT sensor nodes, ensuring long-term reliability of MMBZ6V2ALT1 in low-power designs.
How does MMBZ6V2ALT1 differ from the SZ-prefix variant?
The SZMMBZ6V2ALT1G variant adds AEC-Q101 qualification, PPAP capability, and automotive-specific site controls - while retaining identical electrical parameters, SOT-23 package, and pinout as MMBZ6V2ALT1. No design changes are needed to migrate from MMBZ6V2ALT1 to SZMMBZ6V2ALT1G; the difference lies solely in process documentation and traceability required for automotive production.
MMBZ6V2ALT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3V
- Voltage - Breakdown (Min):
- 5.89V
- Voltage - Clamping (Max) @ Ipp:
- 8.7V
- Current - Peak Pulse (10/1000µs):
- 2.76A
- Power - Peak Pulse:
- 24W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ6V2ALT1 FAQ
1.How can I place an order for MMBZ6V2ALT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ6V2ALT1 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 MMBZ6V2ALT1 reliable?
The price and inventory of MMBZ6V2ALT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ6V2ALT1 is usually 5 days.
3.What payment methods are accepted for MMBZ6V2ALT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ6V2ALT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ6V2ALT1?
MMBZ6V2ALT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ6V2ALT1 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 MMBZ6V2ALT1?
For technical support, including MMBZ6V2ALT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ6V2ALT1 requirements.
6.How does Aetrix verify that MMBZ6V2ALT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ6V2ALT1 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 MMBZ6V2ALT1 meets industry standards.
7.What is the process for return or replacement of MMBZ6V2ALT1?
All MMBZ6V2ALT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ6V2ALT1, 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 MMBZ6V2ALT1 part is unused and in its original packaging.
Return procedure for MMBZ6V2ALT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ6V2ALT1 Tags
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ESD9B5.0ST5G
onsemi
-
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
-
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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