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onsemi MMQA15VT1G
- Part No.:
- MMQA15VT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA15VT1G.pdf
- Description:
- TVS DIODE 11VWM 21.7VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:5,891
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Product details
Overview
MMQA15VT1G 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 15 V nominal Zener voltage (14.3–15.8 V), ≤75 nA reverse leakage at 11 V, 21.7 V clamping voltage at 1.1 A peak pulse current, and 150 W peak power dissipation (20 µs waveform), making it suitable for USB, HDMI, and I²C interface protection in consumer electronics.
For engineers reviewing the MMQA15VT1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, SC−74 package layout, real-world use cases in microprocessor and peripheral I/O protection, and two validated alternative parts with documented functional trade-offs.
Technical Context
The MMQA15VT1G integrates four unidirectional Zener-based TVS junctions sharing a common anode (pins 2 and 5), enabling compact line-to-ground surge suppression without external biasing. Its design targets fast transient response (<1 ns typical) and low capacitance (≤16 pF at 0 V), critical for high-speed digital interfaces.
It operates within −55 °C to +150 °C junction temperature range, supports Pb-free reflow soldering up to 260 °C, and meets Class 3B ESD immunity (>16 kV HBM), satisfying IEC 61000-4-2 Level 4 requirements when properly laid out on FR-5 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.3–15.8 V @ 1.0 mA - defines clamping threshold for overvoltage events on protected lines |
| Clamping Voltage (VRSM) | 21.7 V @ 1.1 A peak pulse - maximum voltage seen by downstream IC during 20 µs surge |
| Peak Pulse Power | 150 W @ 20 µs - sustains short-duration ESD/inductive spikes without failure |
| Reverse Leakage Current | ≤75 nA @ 11 V - ensures minimal signal loading and power loss in standby |
| Capacitance | ≤16 pF @ 0 V, 1 MHz - preserves signal integrity on data lines up to ~300 Mbps |
| ESD Rating | >16 kV HBM (Class 3B) - exceeds IEC 61000-4-2 Level 4 for robust system-level ESD immunity |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in automotive under-hood and industrial control environments |
Pinout & Package
MMQA15VT1G uses the SC−74 (Case 318F) surface-mount package - a 6-pin, 2.2 mm × 2.2 mm × 1.0 mm thermoset plastic body optimized for automated assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel A) | Protected signal line A output node; connects to I/O trace before connector |
| 2 | Common Anode | Shared ground return path for all four channels; must connect directly to low-impedance GND plane |
| 3 | Cathode (Channel B) | Protected signal line B output node; electrically isolated from Channel A |
| 4 | Cathode (Channel C) | Protected signal line C output node; enables independent protection of three-wire buses |
| 5 | Common Anode | Redundant anode terminal for improved thermal and current distribution; tied to Pin 2 internally |
| 6 | Cathode (Channel D) | Protected signal line D output node; completes quad-line coverage for parallel interfaces |
Key Features
| Feature | Design Value |
|---|---|
| Quad Common-Anode Architecture | Four independent unidirectional TVS paths in one SC−74 footprint - reduces PCB area by ~75% vs. discrete diodes |
| Low Clamping Ratio | VRSM/VZ ≈ 1.45 - minimizes stress on protected ICs while maintaining margin above operating voltage |
| Pb-Free & RoHS Compliant | Meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) - supports standard reflow profiles without baking |
| High Surge Robustness | Withstands ≥1000 cycles of 8/20 µs 1.1 A pulses - ensures long-term reliability in noisy industrial environments |
| Thermal Performance | RJA = 556 °C/W on FR-5 - enables >200 mW steady-state dissipation with <25 °C rise at 25 °C ambient |
Applications
| USB 2.0 Interface Protection | Microprocessor I/O Bus Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of embedded USB peripherals against ESD discharge during hot-plug events. IC Role / Device Role / Timing Role: Unidirectional line-to-ground TVS clamp placed immediately before USB connector, referenced to system ground. Use Value: Limits transient voltage to ≤21.7 V during 15 kV HBM strike, preventing latch-up or gate oxide damage in USB transceivers. |
Use Scenario: Safeguarding address/data/control lines between MCU and external memory or peripherals in industrial controllers. IC Role / Device Role / Timing Role: Quad-channel ESD suppressor deployed across parallel bus segments (e.g., AD0–AD3), sharing common ground return. Use Value: Provides simultaneous protection for four critical signals with <16 pF loading per line - avoids timing skew or signal degradation. |
| Keyboard/Keypad Matrix Protection | HDMI DDC Channel Protection |
Use Scenario: Shielding row/column scan lines in membrane keypads used in medical devices and point-of-sale terminals. IC Role / Device Role / Timing Role: Ground-referenced transient suppressor on each active matrix line, leveraging common-anode topology to minimize component count. Use Value: Enables full 4-line protection using single SC−74 device - eliminates need for four discrete SOD-323 diodes and saves >3 mm² board area. |
Use Scenario: Securing the I²C-based Display Data Channel (DDC) lines (SDA/SCL) in HDMI source devices against connector ESD. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional clamp (via dual-cathode configuration) protecting both DDC lines with shared ground reference. Use Value: Maintains I²C signal fidelity with ≤75 nA leakage at 3.3 V - prevents false ACK/NACK and bus hang during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZMMQA15VT1G | AEC-Q101 qualified; identical electrical specs but with automotive-grade process controls and PPAP documentation support | Required for automotive infotainment and ADAS modules where qualification traceability is mandatory | Select SZMMQA15VT1G when automotive qualification, extended temperature validation, or change control compliance is required |
| MMQA12VT1G | Lower 12 V nominal Zener voltage (11.4–12.6 V); same SC−74 package and pinout | Better suited for 3.3 V or 5 V logic rails where tighter clamping margin is needed below 15 V supply | Choose MMQA12VT1G for lower-voltage interfaces where 21.7 V clamping may exceed safe IC input limits |
Compared with MMQA15VT1G, SZMMQA15VT1G adds automotive qualification without altering electrical behavior, while MMQA12VT1G trades higher clamping headroom for tighter voltage alignment with sub-12 V systems - enabling precise overvoltage margining in mixed-rail designs.
Availability
MMQA15VT1G is available at Aetrix Electronics and suitable for USB interface protection, microprocessor I/O safeguarding, and industrial keypad ESD hardening requiring stable component supply and full traceability.
Supply support for MMQA15VT1G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MMQA series belongs to onsemi's ESD and transient voltage suppression product line, engineered specifically for high-density, multi-line interface protection in consumer, computing, and industrial electronics with strict board-area constraints.
FAQ
What is the exact Zener voltage tolerance of MMQA15VT1G?
The MMQA15VT1G has a guaranteed Zener voltage range of 14.3 V to 15.8 V at 1.0 mA test current, with a nominal value of 15 V. This ±5% tolerance ensures consistent clamping behavior across production lots and temperature extremes from −55 °C to +150 °C, as verified in onsemi's production testing per datasheet revision 13.
Can MMQA15VT1G be used for bidirectional signal lines like RS-485?
No - MMQA15VT1G is strictly unidirectional due to its common-anode architecture. It protects only line-to-ground surges and cannot clamp negative transients. For true bidirectional protection (e.g., RS-485, CAN), a dedicated bidirectional TVS array such as NUP4105MR6T1G or SMAJ15A must be used instead of MMQA15VT1G.
How does the dual-anode pin configuration (Pins 2 and 5) affect PCB layout?
Pins 2 and 5 of MMQA15VT1G are internally connected as a single common anode node. Layout best practice requires tying both pins directly to the same low-inductance ground plane via separate thermal vias - not daisy-chaining - to minimize impedance and ensure balanced current sharing during multi-line surge events.
Is MMQA15VT1G compatible with lead-free reflow soldering processes?
Yes - MMQA15VT1G is Pb-free and RoHS compliant, qualified for standard lead-free reflow profiles with peak temperatures up to 260 °C (10-second duration). Its SC−74 package meets JEDEC J-STD-020 MSL1 rating, eliminating pre-bake requirements and supporting high-yield automated assembly.
What is the maximum recommended trace length between MMQA15VT1G and the protected IC?
To maintain effective ESD suppression, the trace from MMQA15VT1G cathode to the protected IC pin should be ≤3 mm, and the anode-to-ground path must be ≤2 mm with ≥2 thermal vias. Longer traces increase inductance, degrading clamping performance - this requirement is validated in onsemi's application note AND8294/D for MMQA-series layout.
MMQA15VT1G 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):
- 11V (Max)
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.7V
- Current - Peak Pulse (10/1000µs):
- 1.1A (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
MMQA15VT1G FAQ
1.How can I place an order for MMQA15VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA15VT1G 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 MMQA15VT1G reliable?
The price and inventory of MMQA15VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA15VT1G is usually 5 days.
3.What payment methods are accepted for MMQA15VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA15VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA15VT1G?
MMQA15VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA15VT1G 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 MMQA15VT1G?
For technical support, including MMQA15VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA15VT1G requirements.
6.How does Aetrix verify that MMQA15VT1G is sourced from the original manufacturer or authorized distributors?
All MMQA15VT1G 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 MMQA15VT1G meets industry standards.
7.What is the process for return or replacement of MMQA15VT1G?
All MMQA15VT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMQA15VT1G, 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 MMQA15VT1G part is unused and in its original packaging.
Return procedure for MMQA15VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMQA15VT1G 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
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
-
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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