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onsemi MMQA30VT1G
- Part No.:
- MMQA30VT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA30VT1G.pdf
- Description:
- TVS DIODE 30VWM 43.3VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:2,715
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Product details
Overview
MMQA30VT1G from onsemi is a quad common-anode unidirectional transient voltage suppressor (TVS) diode array designed for ESD and surge protection of four independent I/O lines in space-constrained applications. It features a 30 V nominal breakdown voltage, 43.3 V maximum clamping voltage at 150 A peak pulse current, 150 W peak power dissipation (20 µs waveform), <75 nA reverse leakage at 23 V, and ESD rating >16 kV per Human Body Model.
For engineers reviewing the MMQA30VT1G datasheet, pinout, applications, or equivalent options, this device is selected for high-density board-level protection of USB, UART, GPIO, and sensor interfaces where low capacitance (≤32 pF), fast response, and SC−74 footprint efficiency are critical.
Technical Context
The MMQA30VT1G integrates four monolithic silicon junctions sharing a common anode connection in a single SC−74 package, enabling compact protection of four signal lines without discrete component duplication. Its unidirectional configuration supports ground-referenced line protection with forward voltage ≤0.9 V at 10 mA.
Thermal performance is defined for FR-5 PCB (RJA = 556 °C/W, PD = 225 mW) and alumina substrate (RJA = 417 °C/W, PD = 300 mW), with operating junction temperature range −55 °C to +150 °C and Pb-free reflow compatibility up to 260 °C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZT) | 28.5–31.5 V @ 1.0 mA - defines minimum trigger threshold for transient suppression |
| Clamping Voltage (VRSM) | 43.3 V @ 150 A (8 × 20 µs) - limits peak line voltage during surge events |
| Peak Pulse Power | 150 W @ 20 µs - sustains high-energy transients without failure |
| Reverse Leakage Current | <75 nA @ 23 V - ensures minimal signal loading and power loss in standby |
| Capacitance (0 V, 1 MHz) | 32 pF max - preserves signal integrity for data rates up to ~100 Mbps |
| ESD Rating (HBM) | >16 kV - exceeds IEC 61000-4-2 Level 4 immunity requirements |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in industrial and automotive under-hood environments |
Pinout & Package
MMQA30VT1G uses the SC−74 (Case 318F−05) surface-mount plastic package - 1.65 mm × 1.25 mm × 0.95 mm - optimized for automated placement and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel A) | Protected line output for first unidirectional TVS path |
| 2 | Common Anode | Shared anode node tied to system ground or reference rail |
| 3 | Cathode (Channel B) | Protected line output for second unidirectional TVS path |
| 4 | Cathode (Channel C) | Protected line output for third unidirectional TVS path |
| 5 | Common Anode | Redundant anode connection for mechanical stability and current sharing |
| 6 | Cathode (Channel D) | Protected line output for fourth unidirectional TVS path |
Key Features
| Feature | Design Value |
|---|---|
| Quad common-anode architecture | Enables four-line protection in one 6-pin SC−74 footprint - reduces board area by ~75% vs. discrete diodes |
| Low clamping ratio (VRSM/VZT ≈ 1.44) | Minimizes overvoltage stress on downstream ICs during ESD or lightning-induced surges |
| Pb-free and RoHS-compliant packaging | Meets J-STD-020 reflow profile requirements and environmental compliance mandates |
| High surge robustness (150 W, 20 µs) | Withstands multiple IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge events without degradation |
| Low dynamic capacitance (≤32 pF) | Preserves rise time and eye diagram integrity for UART, I²C, and SPI signals up to 10 MHz |
Applications
| USB 2.0 Data Lines | Industrial Sensor Interface |
|---|---|
|
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 TVS array clamping transient energy before it reaches the USB transceiver IC. Use Value: Prevents latch-up or permanent damage to USB PHY while maintaining signal fidelity (<32 pF) and meeting USB-IF ESD test requirements. |
Use Scenario: Safeguarding analog and digital outputs of pressure, temperature, or current sensors in factory automation systems. IC Role / Device Role / Timing Role: Ground-referenced transient suppressor on 4-wire sensor outputs (e.g., 4–20 mA loop, RS-485, analog voltage) to absorb cable-coupled surges. Use Value: Enables reliable long-term operation in electrically noisy environments without adding external filtering or sacrificing measurement accuracy. |
| Microcontroller GPIO Protection | Printer Parallel Interface |
|
Use Scenario: Hardening exposed GPIO pins of ARM Cortex-M or PIC microcontrollers used in field-deployable control panels. IC Role / Device Role / Timing Role: Quad-channel ESD clamp limiting voltage excursion to ≤43.3 V during ±15 kV contact discharge. Use Value: Eliminates need for four separate SOD-323 diodes, reducing BOM count and routing complexity while ensuring HBM Class N compliance. |
Use Scenario: Shielding Centronics-style parallel port pins (STROBE, ACK, BUSY, ERROR) in legacy industrial printers from induced transients. IC Role / Device Role / Timing Role: Common-anode TVS array connected between each signal line and chassis ground to shunt fast-rising noise pulses. Use Value: Maintains signal timing margins (low capacitance) and prevents false handshaking due to transient-induced logic glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional quad TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAQ30AT3G | Same 30 V VZ, but SMA package (larger footprint, higher RJA = 70 °C/W); 100 W peak power (20 µs) | Lower power handling and less suitable for ultra-dense layouts; better thermal dissipation on heatsinked boards | Select when higher surge margin is needed and board space allows SMA footprint |
| TPD4E001DPWR | 3.3 V rated, 12 pF typical capacitance, 30 kV HBM; designed for low-voltage data lines | Not interchangeable for 30 V rail protection; intended for 3.3 V logic-level I/O, not 24–30 V industrial signals | Choose only for sub-5 V interfaces requiring ultra-low capacitance and higher ESD rating |
Compared with SMAQ30AT3G and TPD4E001DPWR, the MMQA30VT1G uniquely balances 30 V standoff, 150 W surge capability, and SC−74 miniaturization - making it optimal for industrial I/O modules where both voltage rating and board area are constrained.
Availability
MMQA30VT1G is available at Aetrix Electronics and suitable for industrial automation controllers, medical diagnostic interfaces, and embedded communication gateways requiring stable component supply, Pb-free compliance, and long-lifecycle support.
Supply support for MMQA30VT1G 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, cloud, and consumer markets.
The MMQA series belongs to onsemi's transient protection product line, engineered specifically for high-density, multi-line ESD and surge suppression in space-sensitive industrial and computing applications.
FAQ
What is the exact breakdown voltage tolerance for MMQA30VT1G?
The MMQA30VT1G has a specified breakdown voltage (VZT) range of 28.5 V to 31.5 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 30 V rating. This tight tolerance ensures consistent triggering behavior across production lots and temperature ranges from −55 °C to +150 °C.
Is MMQA30VT1G compatible with lead-free reflow soldering processes?
Yes, MMQA30VT1G is Pb-free and qualified for standard lead-free reflow profiles, including peak temperatures up to 260 °C for 10 seconds. Its SC−74 package meets J-STD-020 moisture sensitivity level (MSL) 1 and requires no pre-bake for typical assembly conditions.
Can MMQA30VT1G be used for bidirectional transient protection?
No, MMQA30VT1G is strictly unidirectional - its internal structure consists of four cathode-anode junctions sharing common anodes (pins 2 and 5). For bidirectional protection, a dedicated symmetric TVS array such as the ESD7L5.0DT5G must be used instead.
What is the maximum allowable reverse standoff voltage for MMQA30VT1G in continuous operation?
The maximum DC reverse standoff voltage for MMQA30VT1G is 23 V - defined as the voltage at which reverse leakage remains ≤75 nA. Operating continuously above this voltage risks excessive leakage current and potential thermal runaway, especially at elevated ambient temperatures.
How does the dual common-anode pin configuration (pins 2 and 5) affect PCB layout?
The dual common-anode pins (2 and 5) in MMQA30VT1G provide lower inductance grounding and improved current sharing during surge events. Layout best practice is to connect both pins directly to a low-impedance ground plane using short, wide traces - avoiding daisy-chaining or narrow vias that increase clamping delay.
MMQA30VT1G 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):
- 30V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 43.3V
- Current - Peak Pulse (10/1000µs):
- 554mA (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
MMQA30VT1G FAQ
1.How can I place an order for MMQA30VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA30VT1G 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 MMQA30VT1G reliable?
The price and inventory of MMQA30VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA30VT1G is usually 5 days.
3.What payment methods are accepted for MMQA30VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA30VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA30VT1G?
MMQA30VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA30VT1G 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 MMQA30VT1G?
For technical support, including MMQA30VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA30VT1G requirements.
6.How does Aetrix verify that MMQA30VT1G is sourced from the original manufacturer or authorized distributors?
All MMQA30VT1G 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 MMQA30VT1G meets industry standards.
7.What is the process for return or replacement of MMQA30VT1G?
All MMQA30VT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMQA30VT1G, 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 MMQA30VT1G part is unused and in its original packaging.
Return procedure for MMQA30VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMQA30VT1G Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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