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onsemi MMQA5V6T1G
- Part No.:
- MMQA5V6T1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA5V6T1G.pdf
- Description:
- TVS DIODE 3VWM 8VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:50,273
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Product details
Overview
MMQA5V6T1G from onsemi is a quad monolithic common-anode ESD protection diode designed for transient overvoltage suppression on four independent signal lines in space-constrained PCBs. It features a nominal Zener voltage of 5.6 V, maximum clamping voltage of 8.0 V at 3.0 A peak pulse current, and ESD rating exceeding 16 kV per Human Body Model (HBM Class 3B). It is used in USB, keyboard, and microprocessor I/O line protection.
For engineers reviewing the MMQA5V6T1G datasheet, pinout, applications, or equivalent options, key selection criteria include unidirectional clamping performance, SC-74 package footprint efficiency, low leakage (<2.0 µA), thermal derating behavior on FR-5 board, and compatibility with automated SMT assembly.
Technical Context
The MMQA5V6T1G implements a quad-junction common-anode configuration in a single SC-74 package, enabling simultaneous protection of four separate unidirectional signal paths referenced to a shared anode node (pins 2 and 5). Each cathode-anode pair operates independently with identical electrical characteristics.
It delivers 24 W peak power dissipation at 1.0 ms pulse width (Figure 5 waveform) and 150 W at 20 µs (Figure 6 waveform), with clamping voltage defined at IRSM = 3.0 A and VRSM = 8.0 V. Thermal resistance is 556 °C/W on FR-5 board, supporting operation from −55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V @ 1.0 mA - defines precise DC breakdown threshold for overvoltage triggering |
| Clamping Voltage (VRSM) | 8.0 V @ 3.0 A peak pulse - limits transient voltage seen by protected IC during ESD event |
| Peak Pulse Power | 24 W @ 1.0 ms / 150 W @ 20 µs - determines survivability against IEC 61000-4-2 and system-level surges |
| Reverse Leakage (IR) | <2.0 µA @ 3.0 V - ensures minimal signal loading and power loss in standby mode |
| ESD Rating (HBM) | >16 kV - exceeds Class 3B requirement for robust handling in manufacturing and end-use environments |
| Junction Temp Range | −55 °C to +150 °C - supports industrial and extended-temperature embedded applications |
| Capacitance @ 0 V | Unspecified in datasheet - not provided for MMQA5V6T1G; typical for 5.6 V variant is ~250 pF (per Fig. 1 trend) |
Pinout & Package
MMQA5V6T1G is housed in an SC-74 (Case 318F) surface-mount package with six terminals and Pb-free finish. The device uses a quad common-anode topology where pins 2 and 5 are internally connected as shared anodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel A) | Protected signal line input for first unidirectional path; connects to external trace requiring ESD clamping |
| 2 | Anode (Common) | Shared anode node for Channels A, B, C, D; must be tied to system ground or reference rail |
| 3 | Cathode (Channel B) | Protected signal line input for second unidirectional path; electrically isolated from other cathodes |
| 4 | Cathode (Channel C) | Protected signal line input for third unidirectional path; enables compact multi-line protection layout |
| 5 | Anode (Common) | Redundant anode connection for improved current sharing and lower parasitic inductance |
| 6 | Cathode (Channel D) | Protected signal line input for fourth unidirectional path; completes quad-channel integration |
Key Features
| Feature | Design Value |
|---|---|
| Quad common-anode architecture | Enables four independent unidirectional ESD protection paths in one SC-74 footprint, reducing PCB area by ~75% vs. discrete diodes |
| 24 W peak pulse power (1.0 ms) | Withstands high-energy transients such as lightning-induced surges on communication interfaces without failure |
| Clamping voltage ≤8.0 V @ 3.0 A | Ensures protected logic inputs remain below absolute maximum ratings during 8/20 µs surge events |
| HBM ESD rating >16 kV | Eliminates need for additional handling controls during board assembly and field service |
| Pb-free, RoHS-compliant SC-74 package | Supports lead-free reflow profiles (260 °C max) and meets global environmental compliance requirements |
Applications
| USB 2.0 Data Lines | Keyboard/Mouse Interface |
|---|---|
|
Use Scenario: Protecting D+ and D− differential pairs in USB 2.0 peripheral ports against ESD discharge during cable insertion or user contact. IC Role / Device Role / Timing Role: Unidirectional clamping diode array providing low-capacitance, fast-response overvoltage suppression on bidirectional data lines. Use Value: Prevents latch-up or damage to USB transceivers while maintaining signal integrity up to 480 Mbps due to matched channel characteristics. |
Use Scenario: Shielding PS/2 or USB HID scan matrix rows/columns from ESD events caused by finger touch on mechanical keyboards or pointing devices. IC Role / Device Role / Timing Role: Quad-channel common-anode ESD suppressor placed at connector entry point to shunt transients before reaching MCU GPIOs. Use Value: Reduces component count from four discrete diodes to one SC-74 device, simplifying layout and improving ESD consistency across all four scan lines. |
| Microprocessor I/O Bus | Industrial Serial Interface |
|
Use Scenario: Safeguarding address/data/control bus lines (e.g., between CPU and peripheral ASIC) in embedded controllers exposed to board-level ESD. IC Role / Device Role / Timing Role: Low-leakage (≤2.0 µA) Zener clamp protecting multiple parallel digital signals referenced to common ground. Use Value: Maintains logic level fidelity during normal operation while limiting transient excursions to ≤8.0 V, preventing false reads or resets. |
Use Scenario: Protecting RS-232/RS-485 transceiver I/O pins in factory automation equipment subject to frequent operator interaction and cable hot-plug events. IC Role / Device Role / Timing Role: Standoff voltage (5.6 V) aligned with ±5 V or 3.3 V logic rails; clamps surges before transceiver input thresholds are exceeded. Use Value: Enables use of cost-effective transceivers without integrated protection, lowering BOM cost while meeting IEC 61000-4-2 Level 4 (±8 kV contact). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESDA6V1SC6 | Lower clamping voltage (6.8 V @ 1 A), higher capacitance (~35 pF), SOT-23-6 package | Better suited for high-speed USB 3.0 or HDMI where low capacitance is critical; less robust for high-current surges | Select when signal bandwidth >100 MHz is required and peak surge current <1 A suffices |
| SZMMQA5V6T1G | Automotive-grade variant (AEC-Q101 qualified), identical electrical specs and pinout, same SC-74 package | Required for automotive infotainment or body control modules needing PPAP documentation and extended temperature validation | Choose for automotive designs requiring qualification evidence; otherwise MMQA5V6T1G is fully suitable for industrial/commercial use |
Compared with ESDA6V1SC6 and SZMMQA5V6T1G, the MMQA5V6T1G offers optimal balance of surge robustness (150 W @ 20 µs), compact quad integration, and commercial-grade cost-making it ideal for space-constrained non-automotive applications where HBM >16 kV and clamping ≤8.0 V are primary requirements.
Availability
MMQA5V6T1G is available at Aetrix Electronics and suitable for USB interface protection, keyboard/mouse I/O safeguarding, and microprocessor bus line shielding requiring stable component supply across production lifecycles.
Supply support for MMQA5V6T1G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMQA5V6T1G belongs to onsemi's Quad Common Anode ESD Protection Diode family, engineered specifically to reduce PCB real estate while delivering high-surge robustness for multi-line digital interfaces in consumer and industrial electronics.
FAQ
What is the exact Zener voltage tolerance of MMQA5V6T1G?
The MMQA5V6T1G has a specified Zener voltage range of 5.32 V to 5.88 V at test current IZT = 1.0 mA, corresponding to ±5% tolerance around the nominal 5.6 V rating. This tight tolerance ensures consistent clamping behavior across production lots and operating temperatures, critical for reliable interface protection in 3.3 V and 5 V systems.
Can MMQA5V6T1G be used for bidirectional signal lines like RS-232?
No-MMQA5V6T1G is strictly unidirectional and configured as common-anode, meaning it only clamps positive transients toward ground. For bidirectional protection (e.g., RS-232), a dual-rail or symmetric TVS array such as NUP4105MR6T1G would be required. Using MMQA5V6T1G on bidirectional lines risks forward conduction during negative excursions.
What is the thermal derating behavior of MMQA5V6T1G above 25°C ambient?
MMQA5V6T1G exhibits linear thermal derating: total power dissipation on FR-5 board decreases by 1.8 mW/°C above 25°C, with full derating to zero at 150°C. Its junction-to-ambient thermal resistance is 556 °C/W, so sustained power dissipation must be reduced proportionally in elevated ambient environments to avoid exceeding TJ(max) = +150°C.
Is MMQA5V6T1G compatible with lead-free reflow soldering processes?
Yes-MMQA5V6T1G is Pb-free and RoHS compliant, qualified for standard lead-free reflow profiles with peak temperature up to 260°C (10-second duration). Its SC-74 package is designed for optimal automated board assembly, and the datasheet explicitly confirms compatibility with industry-standard Pb-free soldering techniques.
How does the dual-anode pin configuration (pins 2 and 5) affect PCB layout?
The dual-anode design (pins 2 and 5) provides redundant low-inductance paths to ground, reducing overall loop inductance during ESD events. In PCB layout, both pins must be connected to the same low-impedance ground plane using short, wide traces-ideally via multiple vias-to maximize surge current handling and minimize voltage overshoot during clamping.
MMQA5V6T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-74, SOT-457
- Series:
- MMQA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3V (Max)
- Voltage - Breakdown (Min):
- 5.32V
- Voltage - Clamping (Max) @ Ipp:
- 8V
- Current - Peak Pulse (10/1000µs):
- 3A (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
MMQA5V6T1G FAQ
1.How can I place an order for MMQA5V6T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA5V6T1G 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 MMQA5V6T1G reliable?
The price and inventory of MMQA5V6T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA5V6T1G is usually 5 days.
3.What payment methods are accepted for MMQA5V6T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA5V6T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA5V6T1G?
MMQA5V6T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA5V6T1G 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 MMQA5V6T1G?
For technical support, including MMQA5V6T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA5V6T1G requirements.
6.How does Aetrix verify that MMQA5V6T1G is sourced from the original manufacturer or authorized distributors?
All MMQA5V6T1G 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 MMQA5V6T1G meets industry standards.
7.What is the process for return or replacement of MMQA5V6T1G?
All MMQA5V6T1G units undergo pre-shipment inspection (PSI). If there is an issue with MMQA5V6T1G, 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 MMQA5V6T1G part is unused and in its original packaging.
Return procedure for MMQA5V6T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMQA5V6T1G 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
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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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