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onsemi MMQA6V2T3
- Part No.:
- MMQA6V2T3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA6V2T3.pdf
- Description:
- TVS DIODE 4VWM 9VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
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Product details
Overview
MMQA6V2T3 from ON Semiconductor is a quad monolithic common-anode ESD protection diode in SC−74 package, rated for 6.2 V nominal Zener voltage, 9.0 V maximum clamping voltage at peak pulse current, and 150 W peak power dissipation (20 µs waveform). It protects four I/O lines simultaneously in space-constrained interfaces such as USB, keyboard, or microprocessor data buses.
For engineers reviewing the MMQA6V2T3 datasheet, pinout, applications, or equivalent options, key selection criteria include unidirectional clamping performance, 16 kV HBM ESD rating, low leakage (<700 nA), SC−74 footprint compatibility, and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device implements four independent unidirectional Zener junctions sharing a common anode (pins 2 and 5), enabling simultaneous transient suppression on four signal lines with minimal PCB area. Its architecture supports single-supply rail-tied protection without external biasing.
Clamping behavior is defined by a 6.2 V nominal breakdown voltage (VZT = 5.89–6.51 V at 1.0 mA), 9.0 V maximum clamping voltage (VRSM) at rated surge current, and thermal resistance of 556 °C/W on FR-5 board - critical for sustained surge handling in industrial I/O ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.2 V (5.89–6.51 V range at 1.0 mA test current; defines primary clamping threshold) |
| Maximum Clamping Voltage | 9.0 V at peak surge current (limits line voltage during ESD transients to safe levels for downstream ICs) |
| Peak Pulse Power | 150 W @ 20 µs waveform (supports high-energy ESD/IEC 61000-4-2 level 4 immunity) |
| ESD Rating (HBM) | Class 3B (>16 kV) - exceeds IEC 61000-4-2 requirements for user-accessible ports |
| Reverse Leakage Current | <700 nA @ VR = 4.0 V (minimizes standby power loss and signal integrity impact) |
| Package | SC−74 (6-pin, 3.0 × 1.5 mm footprint; enables 4-line protection in <4.5 mm² area) |
| Thermal Resistance (RJA) | 556 °C/W on FR-5 board - determines derating curve for continuous operation above 25°C |
Pinout & Package
SC−74 package (Case 318F, Style 1), 6-pin surface-mount, void-free thermosetting plastic body with corrosion-resistant finish. Dimensions: 3.0 × 1.5 × 0.95 mm (L × W × H), 0.95 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel A) | Protected signal line input for first Zener junction; connects to I/O trace requiring clamping |
| 2 | Common Anode | Shared anode node tied to system ground or supply rail; forms return path for all four channels |
| 3 | Cathode (Channel B) | Protected signal line input for second Zener junction; electrically isolated from Pin 1 |
| 4 | Cathode (Channel C) | Protected signal line input for third Zener junction; enables independent routing of three lines |
| 5 | Common Anode | Redundant anode connection (same net as Pin 2); improves current sharing and thermal distribution |
| 6 | Cathode (Channel D) | Protected signal line input for fourth Zener junction; completes quad-line protection capability |
Key Features
| Feature | Design Value |
|---|---|
| Quad common-anode topology | Enables four independent unidirectional ESD paths in one SC−74 package - reduces component count and layout complexity for multi-line interfaces |
| 150 W peak pulse power (20 µs) | Withstands IEC 61000-4-2 contact discharge up to ±15 kV without degradation, supporting industrial-grade robustness |
| 16 kV HBM ESD rating | Exceeds Class 3B requirement - ensures reliable handling during assembly and end-user interaction |
| Low 700 nA reverse leakage | Maintains signal integrity on high-impedance or battery-powered lines without loading or DC offset errors |
| AEC−Q101 qualified | Validated for automotive applications including infotainment I/O and body control module interfaces under temperature cycling and humidity stress |
Applications
| USB 2.0 Data Lines | Industrial Keypad Interface |
|---|---|
Use Scenario: Protecting D+ and D− differential pair plus VBUS and ID pins in compact USB peripheral designs. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between connector and USB transceiver IC. Use Value: Prevents ESD-induced latch-up or damage to USB PHY while occupying only 4.5 mm² PCB area - critical for dongles and embedded hosts. | Use Scenario: Shielding matrix-scanned keypad rows/columns in factory HMIs exposed to operator touch and cable discharge events. IC Role / Device Role / Timing Role: Line-level ESD clamp on each row/column trace before MCU GPIO input. Use Value: Eliminates need for four discrete diodes; maintains <100 ns response time and preserves scan timing integrity under repeated 8 kV contact discharge. |
| Microprocessor Address Bus | Automotive Infotainment I/O |
Use Scenario: Safeguarding 16-bit address bus lines (A0–A15) connecting CPU to external flash or SRAM in space-limited embedded controllers. IC Role / Device Role / Timing Role: Common-anode TVS array suppressing transients induced by nearby relay switching or hot-plug events. Use Value: Limits clamping voltage to ≤9.0 V across all lines - prevents false addressing or memory corruption during EMC testing per ISO 11452-4. | Use Scenario: Protecting UART, LIN, and analog sensor inputs in automotive head units where board real estate is constrained and reliability must meet AEC−Q101. IC Role / Device Role / Timing Role: Primary ESD protection element on low-speed serial and analog front-end traces. Use Value: Delivers 16 kV HBM and 150 W surge capability while maintaining RoHS-compliant, Pb-free solderability for automotive manufacturing flow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZMMQA6V2T3G | Identical electrical specs and SC−74 package; includes SZ prefix indicating automotive-specific traceability and PPAP support | Required for Tier 1 automotive programs needing full PPAP documentation and AEC−Q101 site qualification | Select SZMMQA6V2T3G when automotive OEM compliance (not just qualification) is mandatory |
| MMQA6V2T1G | Same electrical parameters and SC−74 package; differs only in tape-and-reel quantity (3,000 vs. 10,000 units per reel) | Suitable for prototyping, low-volume production, or inventory with smaller lot sizing requirements | Choose MMQA6V2T1G for R&D validation or pilot runs where reel size impacts procurement flexibility |
Compared with SZMMQA6V2T3G and MMQA6V2T1G, the MMQA6V2T3 offers identical protection performance and footprint but targets high-volume industrial and computing applications via its 10,000-unit tape-and-reel packaging - optimizing cost-per-unit and reducing changeover frequency in SMT lines.
Availability
MMQA6V2T3 is available at Aetrix Electronics and suitable for USB interface protection, industrial keypad systems, and microprocessor bus shielding requiring stable component supply, consistent lead-time performance, and long-term lifecycle support.
Supply support for MMQA6V2T3 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and computing markets.
The MMQA/SZMMQA series was developed specifically for high-density, multi-line ESD protection in space-constrained digital interfaces - emphasizing low capacitance, fast response, and AEC−Q101 readiness for automotive and industrial edge devices.
FAQ
What is the clamping voltage specification for MMQA6V2T3 under ESD stress?
The MMQA6V2T3 has a maximum clamping voltage (VRSM) of 9.0 V at its rated peak surge current, measured using the 8 × 20 µs waveform per Figure 6. This value ensures protected ICs see no more than 9.0 V during standardized IEC 61000-4-2 ESD events, preserving logic-level compatibility and preventing overvoltage damage to downstream components in the MMQA6V2T3-protected circuit.
Does MMQA6V2T3 support bidirectional signal lines like RS-485 or CAN?
No, MMQA6V2T3 is a unidirectional ESD protection diode configured for common-anode operation - it clamps only when cathode voltage exceeds anode voltage. It is not suitable for true bidirectional buses; for RS-485 or CAN, use purpose-built bidirectional TVS arrays such as NUP4105MR6T1G. The MMQA6V2T3 datasheet explicitly specifies unidirectional use cases only.
How many independent protection channels does MMQA6V2T3 provide?
The MMQA6V2T3 provides four independent unidirectional protection channels sharing two common anode terminals (Pins 2 and 5). Each cathode (Pins 1, 3, 4, and 6) serves as a dedicated input for a separate signal line, allowing simultaneous ESD suppression on four distinct traces - confirmed by the "quad junction common anode" architecture described in the official ON Semiconductor datasheet for MMQA6V2T3.
What is the thermal resistance of MMQA6V2T3 on standard FR-5 PCB?
The MMQA6V2T3 has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on an FR-5 board measuring 1.0 × 0.75 × 0.62 inches. This value governs the derating curve shown in Figure 4 of the datasheet and must be applied when calculating allowable power dissipation at ambient temperatures above 25°C in the MMQA6V2T3 application layout.
Is MMQA6V2T3 compliant with automotive reliability standards?
Yes, MMQA6V2T3 is AEC−Q101 qualified and PPAP capable, meeting the stress-test requirements for automotive discrete semiconductors. While the base MMQA6V2T3 part is intended for industrial and computing use, its qualification basis allows deployment in non-safety-critical automotive subsystems such as infotainment I/O or body electronics - provided full PPAP documentation is not mandated, unlike the SZMMQA6V2T3G variant.
MMQA6V2T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-74, SOT-457
- Series:
- MMQA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 4V (Max)
- Voltage - Breakdown (Min):
- 5.89V
- Voltage - Clamping (Max) @ Ipp:
- 9V
- Current - Peak Pulse (10/1000µs):
- 2.66A (8/20µs)
- Power - Peak Pulse:
- 150W
- 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:
- SC-74
MMQA6V2T3 FAQ
1.How can I place an order for MMQA6V2T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA6V2T3 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 MMQA6V2T3 reliable?
The price and inventory of MMQA6V2T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA6V2T3 is usually 5 days.
3.What payment methods are accepted for MMQA6V2T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA6V2T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA6V2T3?
MMQA6V2T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA6V2T3 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 MMQA6V2T3?
For technical support, including MMQA6V2T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA6V2T3 requirements.
6.How does Aetrix verify that MMQA6V2T3 is sourced from the original manufacturer or authorized distributors?
All MMQA6V2T3 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 MMQA6V2T3 meets industry standards.
7.What is the process for return or replacement of MMQA6V2T3?
All MMQA6V2T3 units undergo pre-shipment inspection (PSI). If there is an issue with MMQA6V2T3, 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 MMQA6V2T3 part is unused and in its original packaging.
Return procedure for MMQA6V2T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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