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onsemi MMQA20VT1G
- Part No.:
- MMQA20VT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA20VT1G.pdf
- Description:
- TVS DIODE 15VWM 28.6VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:17,295
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Product details
Overview
MMQA20VT1G from onsemi is a quad unidirectional ESD protection diode in SC-74 package, featuring 20 V nominal Zener voltage (19–21 V range), ≤75 nA reverse leakage at 15 V, 28.6 V clamping voltage at 1.0 A peak pulse current, and 24 W peak power dissipation (1.0 ms waveform). It protects four I/O lines with common-anode topology in space-constrained interfaces such as USB, HDMI, and keyboard controllers.
For engineers reviewing the MMQA20VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 1.0 A surge, low capacitance (<20.1 pF at 0 V), Class 3B ESD rating (>16 kV HBM), and SC-74 footprint compatibility for high-density PCB layouts.
Technical Context
This device implements a monolithic quad-junction common-anode structure-four independent Zener diodes sharing one anode terminal (pins 2 and 5)-enabling simultaneous protection of four signal lines without inter-channel coupling. Each cathode-anode path operates as a standalone unidirectional TVS with identical electrical specs.
It is rated for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), with clamping performance validated using the 10/1000 µs waveform (Figure 5) and 8/20 µs waveform (Figure 6). Thermal resistance is 556 °C/W on FR-5 board, supporting continuous operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZT) | 19–21 V @ 1.0 mA test current - defines precise overvoltage threshold for 20 V rail protection |
| Clamping Voltage (VRSM) | 28.6 V @ 1.0 A peak pulse - limits transient voltage seen by downstream ICs during ESD events |
| Peak Pulse Power (PPK) | 24 W @ 1.0 ms waveform - supports robust single-event surge handling in industrial interfaces |
| Reverse Leakage (IR) | ≤75 nA @ 15 V - ensures minimal signal distortion and power loss in high-impedance data lines |
| Capacitance (CJ) | 20.1 pF @ 0 V, 1 MHz - maintains signal integrity for <100 Mbps digital interfaces (e.g., UART, I²C) |
| ESD Rating (HBM) | Class 3B (>16 kV) - exceeds IEC 61000-4-2 Level 4 requirements for end-equipment immunity |
| Junction Temp Range | −55 to +150 °C - enables deployment in automotive cabin modules and industrial control enclosures |
Pinout & Package
SC-74 (Case 318F) surface-mount package: 6-pin, lead-free, RoHS-compliant, optimized for automated placement. Dimensions: 2.2 mm × 1.35 mm × 1.0 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Channel A) | Protected line input for first signal path; connects to I/O trace before connector |
| Pin 2 | Anode (Common) | Shared anode node tied to system ground or protected rail return; electrically common to Pins 5 |
| Pin 3 | Cathode (Channel B) | Protected line input for second signal path; isolated from other cathodes |
| Pin 4 | Cathode (Channel C) | Protected line input for third signal path; no internal connection to other cathodes |
| Pin 5 | Anode (Common) | Second physical anode terminal-electrically bonded to Pin 2; improves thermal and current-sharing capability |
| Pin 6 | Cathode (Channel D) | Protected line input for fourth signal path; completes quad-channel configuration |
Key Features
| Feature | Design Value |
|---|---|
| Quad Common-Anode Topology | Four independent unidirectional protection paths share two anode pins-reduces component count and PCB area vs. discrete diodes |
| Low Clamping Voltage | 28.6 V at 1.0 A ensures logic-level interfaces (e.g., 3.3 V/5 V microcontrollers) remain within safe operating voltage during transients |
| Pb-Free & RoHS Compliance | Meets global environmental regulations and reflow soldering standards (260 °C, 10 s); compatible with lead-free assembly processes |
| High ESD Robustness | Exceeds 16 kV Human Body Model-eliminates need for external ESD staging in consumer port designs |
| Thermal Performance | 556 °C/W RJA on FR-5 board enables sustained operation at 75 °C ambient without derating in compact enclosures |
Applications
| USB 2.0 Port Protection | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting D+ and D− differential pair plus VBUS and ID lines on Type-A/B receptacles against ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between connector and USB transceiver IC. Use Value: 20.1 pF capacitance avoids signal rise-time degradation; 28.6 V clamping prevents damage to 3.3 V PHY circuitry during ±15 kV contact discharge. |
Use Scenario: Safeguarding TMDS clock and data channels (CLK+, CLK−, DATA0+, DATA0−, etc.) on source-side HDMI ports. IC Role / Device Role / Timing Role: Line-to-ground ESD clamp on each differential pair, leveraging quad configuration for full channel coverage. Use Value: Low leakage (<75 nA) preserves DC bias integrity; common-anode architecture simplifies grounding to HDMI shield plane without cross-talk. |
| Industrial Keypad Interface | Medical Sensor I/O Protection |
Use Scenario: Shielding membrane keypad scan lines (row/column) in factory HMIs exposed to operator touch-induced ESD. IC Role / Device Role / Timing Role: Per-line cathode-to-ground clamp with shared anode tied to local keypad ground plane. Use Value: 24 W peak power rating handles repetitive 8/20 µs surges from electrostatic discharge; SC-74 footprint fits 2.5 mm pitch key matrix layouts. |
Use Scenario: Protecting analog front-end inputs (ECG leads, SpO₂ photodiode outputs) from ESD during patient connection/disconnection. IC Role / Device Role / Timing Role: Low-capacitance, low-leakage transient suppressor placed immediately after connector, before instrumentation amplifier. Use Value: 20.1 pF capacitance avoids filtering critical biopotential signals (0.05–100 Hz); −55 to +150 °C rating supports sterilization cycles and body-worn operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZMMQA20VT1G | AEC-Q101 qualified; identical electrical specs but automotive-grade process control and PPAP documentation support | Required for automotive infotainment I/O protection; not needed for commercial medical or industrial use | Select SZMMQA20VT1G only when automotive qualification (e.g., dashboard USB ports) is mandated |
| MMQA20VT3G | Same die and specs; differs only in packaging-10,000-unit tape-and-reel vs. 3,000-unit reel for MMQA20VT1G | No functional difference; chosen based on production volume and SMT line feeder capacity | Choose MMQA20VT3G for high-volume manufacturing; MMQA20VT1G suits prototyping and low-MOQ builds |
Compared with SZMMQA20VT1G and MMQA20VT3G, the MMQA20VT1G provides identical protection performance in commercial-grade SC-74 packaging, making it optimal for cost-sensitive, non-automotive applications where AEC-Q101 compliance or bulk reel size are not required.
Availability
MMQA20VT1G is available at Aetrix Electronics and suitable for USB interface protection, industrial keypad systems, and medical sensor I/O requiring stable component supply across design-in, NPI, and production phases.
Supply support for MMQA20VT1G 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 protection portfolio, engineered specifically for high-density, multi-line transient suppression in space-constrained consumer and industrial interfaces.
FAQ
What is the maximum clamping voltage of MMQA20VT1G under a 1.0 A ESD pulse?
The MMQA20VT1G has a maximum clamping voltage (VRSM) of 28.6 V when subjected to a 1.0 A peak pulse current per the 10/1000 µs waveform defined in Figure 5 of the datasheet. This value ensures downstream 3.3 V or 5 V logic circuits remain within safe operating limits during transient events. The MMQA20VT1G achieves this while maintaining low leakage and tight Zener voltage tolerance.
Can MMQA20VT1G be used for bidirectional signal lines like RS-485?
No-MMQA20VT1G is strictly unidirectional due to its common-anode Zener structure and lacks symmetrical breakdown in reverse bias. For bidirectional protection (e.g., RS-485, CAN), a dedicated bidirectional TVS array such as the NUP4201MR6T1G must be used. The MMQA20VT1G is designed exclusively for cathode-to-ground configurations on positive-rail signal lines.
What is the thermal resistance (RJA) of MMQA20VT1G on a standard FR-5 PCB?
The MMQA20VT1G exhibits a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on a standard FR-5 board (1.0 × 0.75 × 0.62 in.), as specified in the Thermal Characteristics table. This value assumes no additional copper pour or thermal vias; adding 1 cm² of 2-oz copper connected to the anode pads reduces RJA by ~30%, improving surge handling reliability. The MMQA20VT1G remains within spec up to +150 °C junction temperature.
Does MMQA20VT1G meet IEC 61000-4-2 Level 4 ESD immunity requirements?
Yes-the MMQA20VT1G is rated for Class 3B per the Human Body Model (HBM), exceeding 16 kV contact discharge, which satisfies and surpasses IEC 61000-4-2 Level 4 (±8 kV contact / ±15 kV air) requirements. Its low clamping voltage and fast response ensure protected circuits maintain functionality after repeated ESD strikes. The MMQA20VT1G achieves this without external components or layout dependencies beyond proper grounding of the common anode pins.
How many independent protection channels does MMQA20VT1G provide?
The MMQA20VT1G provides four independent unidirectional protection channels via its monolithic quad-junction common-anode structure. Pins 1, 3, 4, and 6 serve as individual cathodes, while Pins 2 and 5 form the shared anode node. This allows simultaneous safeguarding of four separate signal lines-such as USB D+, D−, VBUS, and ID-with a single SC-74 footprint. The MMQA20VT1G eliminates routing complexity and saves >70% board area versus four discrete diodes.
MMQA20VT1G 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):
- 15V (Max)
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 28.6V
- Current - Peak Pulse (10/1000µs):
- 840mA (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
MMQA20VT1G FAQ
1.How can I place an order for MMQA20VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA20VT1G 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 MMQA20VT1G reliable?
The price and inventory of MMQA20VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA20VT1G is usually 5 days.
3.What payment methods are accepted for MMQA20VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA20VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA20VT1G?
MMQA20VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA20VT1G 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 MMQA20VT1G?
For technical support, including MMQA20VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA20VT1G requirements.
6.How does Aetrix verify that MMQA20VT1G is sourced from the original manufacturer or authorized distributors?
All MMQA20VT1G 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 MMQA20VT1G meets industry standards.
7.What is the process for return or replacement of MMQA20VT1G?
All MMQA20VT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMQA20VT1G, 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 MMQA20VT1G part is unused and in its original packaging.
Return procedure for MMQA20VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMQA20VT1G Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
-
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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