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onsemi MMQA6V2T1
- Part No.:
- MMQA6V2T1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA6V2T1.pdf
- Description:
- TVS DIODE 4VWM 9VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:6,381
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Product details
Overview
MMQA6V2T1 from ON Semiconductor is a quad monolithic common-anode ESD protection diode in SC−74 package, with nominal Zener voltage 6.2 V, max clamping voltage 9.0 V at 2.66 A surge current, and ESD rating >16 kV (HBM Class 3B), designed to protect four I/O lines in space-constrained interfaces like USB, keyboard, or microprocessor buses.
For engineers reviewing the MMQA6V2T1 datasheet, pinout, applications, or equivalent options, this device offers verified unidirectional transient suppression for high-density PCBs where board area, low leakage (<700 nA), and fast response to ESD events are critical selection criteria.
Technical Context
The MMQA6V2T1 implements a quad-junction common-anode architecture-pins 2 and 5 serve as shared anodes, while pins 1, 3, 4, and 6 are independent cathodes-enabling four separate unidirectional protection paths in one SC−74 footprint. Its design targets single-polarity transients on data or control lines tied to ground-referenced rails.
It delivers 24 W peak power dissipation (1.0 ms pulse) and 150 W (20 µs pulse), with thermal resistance of 556 °C/W on FR-5 board. Clamping occurs at ≤9.0 V under 2.66 A peak surge current, ensuring downstream ICs remain within safe operating voltage windows during ESD or lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZT) | 6.2 V nominal, ±5% tolerance - sets precise clamping threshold for 5 V–6 V logic interfaces |
| Max Clamping Voltage (VRSM) | 9.0 V @ 2.66 A - guarantees protected line stays below 9.0 V during worst-case 20 µs surge |
| Reverse Leakage (IR) | <700 nA @ 4.0 V - minimizes standby power loss and signal integrity impact on high-impedance nodes |
| ESD Rating (HBM) | Class 3B (>16 kV) - exceeds IEC 61000-4-2 Level 4 for robust system-level ESD immunity |
| Peak Pulse Power (1.0 ms) | 24 W - sustains short-duration overvoltage events without degradation in typical I/O protection use |
| Capacitance @ 0 V | Not specified in datasheet - no capacitance value provided for MMQA6V2T1G/T3G variant |
| Package | SC−74 (Case 318F) - 6-pin surface-mount package occupying ~3.0 × 1.5 mm, enabling ultra-dense layout |
Pinout & Package
SC−74 package (Case 318F, Style 1) measures 3.0 × 1.5 × 1.0 mm with gull-wing leads; optimized for automated placement and reflow soldering on high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel A) | Protected line output for first unidirectional path; connects to I/O trace, anode tied to ground or supply rail |
| 2 | Anode (Common) | Shared anode node for Channels A, B, C, D; must be connected to reference potential (e.g., GND) |
| 3 | Cathode (Channel B) | Protected line output for second unidirectional path; electrically isolated from other cathodes |
| 4 | Cathode (Channel C) | Protected line output for third unidirectional path; supports independent routing without crosstalk |
| 5 | Anode (Common) | Redundant common anode terminal - used for improved current sharing or layout flexibility |
| 6 | Cathode (Channel D) | Protected line output for fourth unidirectional path; completes quad-line protection in single package |
Key Features
| Feature | Design Value |
|---|---|
| Quad Common-Anode Architecture | Four independent cathodes share two anodes (pins 2 & 5), reducing component count and PCB real estate by 75% vs discrete diodes |
| 24 W Peak Power (1.0 ms) | Handles industrial-grade transient energy without failure, supporting IEC 61000-4-5 surge compliance in compact designs |
| Low Reverse Leakage | <700 nA @ 4.0 V ensures negligible DC loading on sensitive analog or high-Z digital inputs |
| AEC−Q101 Qualified (SZ variant) | Validated for automotive environments; MMQA6V2T1 itself is industrial-grade but shares identical die and qualification baseline |
| Pb-Free & RoHS Compliant | Meets global environmental regulations; compatible with standard SnPb and lead-free reflow profiles up to 260°C |
Applications
| USB 2.0 Data Line Protection | Keyboard/Keypad Interface |
|---|---|
Use Scenario: Protecting D+ and D− lines of embedded USB peripherals against ESD discharge during plug/unplug cycles. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between connector and PHY, with common anode grounded. Use Value: Prevents latch-up or damage to USB transceivers by clamping transients to ≤9.0 V while adding <0.5 pF parasitic capacitance (inferred from family trend). | Use Scenario: Shielding matrix scan lines in industrial keypad assemblies exposed to operator touch-induced ESD. IC Role / Device Role / Timing Role: Four-channel line protector where each cathode guards one row/column line, anodes tied to system ground. Use Value: Eliminates need for four discrete SOD-323 diodes, saving >25 mm² board area and reducing assembly cost. |
| Microprocessor Address Bus | Printer Parallel Interface |
Use Scenario: Safeguarding 16-bit address bus traces running from CPU to memory or peripheral controllers in medical equipment. IC Role / Device Role / Timing Role: Distributed clamping device placed near connector or bus stubs; each cathode assigned to one address line. Use Value: Maintains signal integrity during ESD events by limiting overshoot to <9.0 V, avoiding false addressing or bus contention. | Use Scenario: Hardening Centronics-style parallel port signals (STROBE, ACK, BUSY, ERROR) in office printers subject to cable discharge events. IC Role / Device Role / Timing Role: Quad-line protector mounted at rear-panel connector, with common anode connected to chassis ground. Use Value: Enables full 4-line protection with single-component placement, simplifying layout and improving yield in high-volume manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD5Z6.0T1G | Single-channel, same Zener voltage (6.0 V), lower peak power (12 W @ 1.0 ms), smaller SOD-523 package | Requires four units for quad-line protection; higher assembly cost and larger total footprint than MMQA6V2T1 | Select when only one line needs protection or board layout favors discrete placement over integrated quad solution |
| SZMMQA6V2T1G | Identical electrical specs and pinout; AEC-Q101 qualified, PPAP-capable, with automotive-specific traceability and change control | Approved for automotive ECUs and ADAS modules where qualification documentation and lot traceability are mandatory | Select for automotive programs; otherwise MMQA6V2T1 is functionally and physically interchangeable in industrial designs |
Compared with ESD5Z6.0T1G, MMQA6V2T1 reduces component count and layout complexity for multi-line interfaces; compared with SZMMQA6V2T1G, it provides identical protection performance at lower cost and documentation overhead for non-automotive applications.
Availability
MMQA6V2T1 is available at Aetrix Electronics and suitable for USB interface protection, keyboard matrix hardening, microprocessor bus safeguarding, and printer parallel port ESD mitigation requiring stable component supply across production lifecycles.
Supply support for MMQA6V2T1 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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMQA series belongs to onsemi's transient voltage suppression portfolio, engineered specifically for high-density, multi-line ESD protection in space-constrained computing and peripheral interfaces.
FAQ
What is the exact Zener voltage tolerance for MMQA6V2T1?
The MMQA6V2T1 has a nominal Zener voltage of 6.2 V with a tolerance range of 6.2 V (min) to 6.51 V (max) at test current IZT = 1.0 mA, per the Electrical Characteristics table on page 2 of the official datasheet. This ±2.5% window ensures reliable clamping for 5 V logic systems without excessive margin.
Does MMQA6V2T1 support bidirectional ESD protection?
No, MMQA6V2T1 is strictly unidirectional. Its common-anode configuration requires the anodes (pins 2 and 5) to be tied to a reference potential (typically ground), and cathodes (pins 1, 3, 4, 6) to connect to protected lines. It does not clamp positive transients on cathodes relative to anode - only negative excursions relative to the anode node.
What is the maximum surge current rating for MMQA6V2T1?
The MMQA6V2T1 supports a maximum non-repetitive peak reverse surge current (IRSM) of 2.66 A, measured at its clamping voltage of 9.0 V under the 20 µs pulse waveform defined in Figure 6 of the datasheet. This rating applies per channel, with all four channels rated identically.
Is MMQA6V2T1 RoHS compliant and lead-free?
Yes, MMQA6V2T1 is Pb-free and RoHS compliant, as confirmed in the datasheet footnote and marking diagram ('M' suffix denotes Pb-free package). It meets JEDEC J-STD-020 moisture sensitivity level 1 and withstands peak reflow temperatures up to 260°C for 10 seconds.
Can MMQA6V2T1 replace discrete 1N4735A Zener diodes in voltage regulation?
No, MMQA6V2T1 is not intended for voltage regulation. It is an ESD/transient suppressor optimized for fast clamping during surge events, not for stable DC voltage reference. Its Zener impedance (ZZT) and temperature coefficient are unspecified, and its power derating curve is designed for pulsed operation-not continuous DC dissipation.
MMQA6V2T1 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
MMQA6V2T1 FAQ
1.How can I place an order for MMQA6V2T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA6V2T1 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 MMQA6V2T1 reliable?
The price and inventory of MMQA6V2T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA6V2T1 is usually 5 days.
3.What payment methods are accepted for MMQA6V2T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA6V2T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA6V2T1?
MMQA6V2T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA6V2T1 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 MMQA6V2T1?
For technical support, including MMQA6V2T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA6V2T1 requirements.
6.How does Aetrix verify that MMQA6V2T1 is sourced from the original manufacturer or authorized distributors?
All MMQA6V2T1 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 MMQA6V2T1 meets industry standards.
7.What is the process for return or replacement of MMQA6V2T1?
All MMQA6V2T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMQA6V2T1, 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 MMQA6V2T1 part is unused and in its original packaging.
Return procedure for MMQA6V2T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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