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onsemi MMBZ6V8ALT1
- Part No.:
- MMBZ6V8ALT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ6V8ALT1.pdf
- Description:
- TVS DIODE 4.5VWM 9.6VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,048
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Product details
Overview
MMBZ6V8ALT1 from onsemi is a dual common-anode Zener diode in SOT-23 package, designed for transient overvoltage and ESD protection of two independent signal lines. It features a nominal Zener breakdown voltage of 6.8 V (±5%), clamping voltage of 9.6 V at 2.5 A peak pulse current, and 24 W peak power dissipation (1 ms pulse), making it suitable for I/O line protection in compact computing and communication interfaces.
For engineers reviewing the MMBZ6V8ALT1 datasheet, pinout, applications, or equivalent options, this device serves as a space-efficient dual-line TVS solution with Class 3B HBM ESD rating (>16 kV), IEC61000-4-2 Level 4 compliance (±30 kV contact), and low leakage (<0.5 µA at 4.5 V reverse bias).
Technical Context
This dual-junction Zener operates in unidirectional mode when connected between either cathode pin (1 or 2) and the common anode (pin 3), enabling independent clamping of two signal paths. Its 6.8 V nominal breakdown is specified at 1 mA test current, with temperature coefficient of ±1.26 mV/°C and maximum Zener impedance of 1.0 Ω at IZT.
The device supports both discrete unidirectional protection and bidirectional configuration via external circuitry. Thermal resistance is 556 °C/W on FR-5 board, and it maintains stable clamping performance across −55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VBR) | 6.46–7.14 V @ IT = 1 mA - ensures precise 6.8 V nominal clamping with ±5% tolerance for reliable voltage thresholding |
| Clamping Voltage (VC) | 9.6 V @ IPP = 2.5 A - limits transient-induced voltage overshoot to safe levels during ESD events |
| Peak Pulse Power | 24 W @ 1.0 ms - sustains high-energy transients without failure in industrial and computing environments |
| ESD Rating (HBM) | Class 3B (>16 kV) - meets stringent electrostatic discharge immunity requirements for end-user accessible ports |
| Reverse Leakage (IR) | <0.5 µA @ VRWM = 4.5 V - minimizes standby current draw and avoids signal integrity degradation |
| Working Peak Reverse Voltage | 4.5 V - defines maximum continuous reverse bias before significant conduction begins |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in automotive under-hood, industrial control, and medical equipment |
Pinout & Package
SOT-23 (TO-236) package, 2.90 mm × 1.30 mm × 1.00 mm, void-free thermosetting plastic case with UL 94 V-0 flammability rating and Pb-free/RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode 1 | First protected line's cathode connection; reverse-biased during overvoltage events on Line 1 |
| Pin 2 | Cathode 2 | Second protected line's cathode connection; enables independent clamping of Line 2 |
| Pin 3 | Common Anode | Shared anode node tied to ground or reference rail; forms dual-Zener structure in single package |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Protects two signal lines with one SOT-23 footprint-reduces PCB area by ~50% vs. discrete dual diodes |
| IEC61000-4-2 Level 4 compliance | ±30 kV contact discharge immunity-meets highest industrial and medical ESD robustness standard |
| Low clamping voltage ratio (VC/VBR) | 1.41 (9.6 V / 6.8 V)-minimizes voltage overshoot margin while maintaining margin above operating rail |
| Thermal derating capability | 1.8 mW/°C on FR-5 board-enables predictable power handling in thermally constrained layouts |
| Pb-free and RoHS compliant | Meets global environmental regulations without compromising surge performance or reliability |
Applications
| USB 2.0 Data Lines | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting D+ and D− lines in embedded USB peripherals against ESD and cable discharge events. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor placed directly at connector entry point. Use Value: Prevents latch-up or damage to USB transceivers while maintaining signal integrity up to 480 Mbps due to low capacitance and fast response. |
Use Scenario: Safeguarding analog sensor inputs (e.g., 4–20 mA loop or RTD bridges) from field-induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end overvoltage clamp on differential input channels before signal conditioning amplifiers. Use Value: Ensures system uptime by absorbing >24 W transients without degradation, preserving measurement accuracy and long-term calibration stability. |
| Keyboard/Mouse I/O Ports | Medical Patient Monitor Inputs |
|
Use Scenario: ESD protection for PS/2 or proprietary keyboard/mouse interface lines exposed to frequent human contact. IC Role / Device Role / Timing Role: Common-anode dual Zener placed between each data line and chassis ground. Use Value: Achieves >16 kV HBM immunity in minimal board area-critical for thin client and kiosk designs with tight mechanical envelopes. |
Use Scenario: Protecting ECG, SpO₂, or NIBP signal acquisition inputs from defibrillator-induced surges and hospital-grade ESD. IC Role / Device Role / Timing Role: First-stage transient suppressor before isolation barrier and precision ADC front-end. Use Value: Maintains patient safety compliance (IEC 60601-1) by limiting transient energy delivered to downstream circuitry below hazardous thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ6V8ALFCT1G | Same electrical specs but optimized for higher-volume tape-and-reel packaging (8 mm carrier); identical SOT-23 pinout and thermal profile | Targeted at high-throughput SMT assembly lines requiring tighter reel tension control and automated vision inspection compatibility | Select when production volume exceeds 50k units/year and feeder compatibility with FCT-style reels is required |
| SZMMBZ6V8ALT1G | AEC-Q101 qualified, PPAP-capable, with automotive-specific traceability and extended temperature screening (−40 °C to +150 °C) | Required for automotive infotainment, body control modules, or ADAS sensor interfaces where qualification evidence is mandatory | Choose only when automotive OEM compliance documentation (e.g., PPAP Level 3) and lot-level test reports are contractually required |
Compared with MMBZ6V8ALT1, MMBZ6V8ALFCT1G offers identical protection performance with enhanced manufacturability for mass production, while SZMMBZ6V8ALT1G adds automotive qualification overhead without improving electrical robustness-making the base MMBZ6V8ALT1 optimal for industrial, computing, and medical non-automotive use cases.
Availability
MMBZ6V8ALT1 is available at Aetrix Electronics and suitable for USB interface protection, industrial sensor signal conditioning, and medical device I/O hardening requiring stable component supply and full RoHS compliance.
Supply support for MMBZ6V8ALT1 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.
The MMBZxxxALT1G series targets compact, high-density transient protection needs-designed specifically for space-constrained I/O interfaces in computing, communications, and portable medical equipment.
FAQ
What is the maximum clamping voltage of the MMBZ6V8ALT1 under ESD stress?
The MMBZ6V8ALT1 exhibits a maximum clamping voltage (VC) of 9.6 V at a peak pulse current (IPP) of 2.5 A, measured per the 1.0 ms rectangular waveform in Figure 6 of the datasheet. This value ensures downstream ICs see limited overvoltage during standardized IEC61000-4-2 contact discharge events. The MMBZ6V8ALT1 maintains this clamping performance across its full operating temperature range.
Can the MMBZ6V8ALT1 be used in bidirectional protection configurations?
Yes-the MMBZ6V8ALT1 supports bidirectional protection when externally configured with series resistors and/or additional diodes to enable symmetrical clamping on both polarities. While its native dual common-anode structure is unidirectional, the datasheet confirms bidirectional operation is achievable using standard circuit techniques. The MMBZ6V8ALT1's low leakage and tight VBR tolerance make it well-suited for such implementations.
Is the MMBZ6V8ALT1 compatible with lead-free reflow soldering processes?
Yes-the MMBZ6V8ALT1 uses a Pb-free, RoHS-compliant finish and is rated for lead-free reflow with a maximum solder temperature of 260 °C for 10 seconds. Its SOT-23 package is designed for optimal automated board assembly, including compatibility with standard J-STD-020 moisture sensitivity level (MSL) 1 profiles. The MMBZ6V8ALT1 meets IPC/JEDEC J-STD-020D requirements for surface-mount reflow.
What is the working peak reverse voltage (VRWM) specification for the MMBZ6V8ALT1?
The MMBZ6V8ALT1 has a working peak reverse voltage (VRWM) of 4.5 V, meaning it remains in high-impedance blocking mode for reverse biases up to this level. This parameter defines the maximum continuous operating voltage before significant leakage occurs, ensuring compatibility with 3.3 V and 5 V logic interfaces. The MMBZ6V8ALT1's VRWM is verified at TA = 25 °C with IR < 0.5 µA.
Does the MMBZ6V8ALT1 meet IEC61000-4-2 Level 4 ESD requirements?
Yes-the MMBZ6V8ALT1 is explicitly rated for IEC61000-4-2 Level 4, with ±30 kV contact discharge and ±30 kV air discharge capability. This certification is confirmed in the "ESD Rating" section of the datasheet and validated through onsemi's qualified test labs. The MMBZ6V8ALT1 delivers this performance without external components, making it ideal for certified medical and industrial product designs.
MMBZ6V8ALT1 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):
- 4.5V
- Voltage - Breakdown (Min):
- 6.46V
- Voltage - Clamping (Max) @ Ipp:
- 9.6V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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)
MMBZ6V8ALT1 FAQ
1.How can I place an order for MMBZ6V8ALT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ6V8ALT1 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 MMBZ6V8ALT1 reliable?
The price and inventory of MMBZ6V8ALT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ6V8ALT1 is usually 5 days.
3.What payment methods are accepted for MMBZ6V8ALT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ6V8ALT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ6V8ALT1?
MMBZ6V8ALT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ6V8ALT1 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 MMBZ6V8ALT1?
For technical support, including MMBZ6V8ALT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ6V8ALT1 requirements.
6.How does Aetrix verify that MMBZ6V8ALT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ6V8ALT1 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 MMBZ6V8ALT1 meets industry standards.
7.What is the process for return or replacement of MMBZ6V8ALT1?
All MMBZ6V8ALT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ6V8ALT1, 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 MMBZ6V8ALT1 part is unused and in its original packaging.
Return procedure for MMBZ6V8ALT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ6V8ALT1 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
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DESD5V0U1BA-7
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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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