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onsemi MMQA24VT1
- Part No.:
- MMQA24VT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA24VT1.pdf
- Description:
- TVS DIODE 18VWM 34.6VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:7,193
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Product details
Overview
MMQA24VT1 from ON Semiconductor is a quad monolithic common-anode ESD protection diode in SC−74 package, designed for transient overvoltage suppression on four independent signal lines. It features 24 V nominal Zener voltage (22.8–25.2 V), 100 A maximum reverse surge current, and clamps at ≤34.6 V under peak pulse conditions - ideal for protecting I/O ports in space-constrained industrial interfaces.
For engineers reviewing the MMQA24VT1 datasheet, pinout, applications, or equivalent options, key selection criteria include unidirectional clamping performance, 150 W peak power capability at 20 µs, Class 3B ESD rating (>16 kV HBM), low leakage (<75 nA), and SC−74 footprint compatibility with high-density PCB layouts.
Technical Context
This device implements a quad-junction common-anode topology where Pin 2 and Pin 5 serve as shared anodes, and Pins 1/3/4/6 are individual cathodes - enabling four independent unidirectional TVS paths in one package. Each channel operates with a specified breakdown voltage of 22.8–25.2 V at 1.0 mA test current and maintains clamping voltage ≤34.6 V at 100 A peak pulse current per Figure 5 waveform.
Thermal design is supported by junction-to-ambient thermal resistance of 556 °C/W on FR-5 board and 417 °C/W on alumina substrate. Its Pb-free SC−74 package (Case 318F) complies with RoHS and supports reflow soldering up to 260 °C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZT) | 22.8–25.2 V @ 1.0 mA - defines precise clamping threshold for 24 V rail protection |
| Clamping Voltage (VRSM) | ≤34.6 V @ 100 A - ensures downstream ICs see safe voltage during ESD transients |
| Peak Pulse Power | 150 W @ 20 µs - handles high-energy surges per IEC 61000-4-5 Level 4 |
| ESD Rating | Class 3B (>16 kV HBM) - exceeds industrial immunity requirements |
| Reverse Leakage (IR) | ≤75 nA @ 19.2 V - minimizes standby power loss in always-on interfaces |
| Capacitance | 25 pF @ 0 V, 1 MHz - preserves signal integrity for <100 Mbps digital lines |
| Package | SC−74 (Case 318F) - 3.0 × 1.5 mm footprint enables compact 4-line protection |
Pinout & Package
SC−74 package (Case 318F, Style 1) is a 6-pin surface-mount plastic package with void-free transfer-molded construction, optimized for automated assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Channel A) | Protected line output for first unidirectional TVS path |
| Pin 2 | Common Anode | Shared anode connection for Channels A, B, C, D - ties to system ground or bias rail |
| Pin 3 | Cathode (Channel B) | Protected line output for second unidirectional TVS path |
| Pin 4 | Cathode (Channel C) | Protected line output for third unidirectional TVS path |
| Pin 5 | Common Anode | Redundant/common anode terminal - electrically identical to Pin 2 |
| Pin 6 | Cathode (Channel D) | Protected line output for fourth unidirectional TVS path |
Key Features
| Feature | Design Value |
|---|---|
| Quad common-anode architecture | Enables four independent ESD protection paths using only two anode connections - reduces PCB trace count and layout complexity |
| 150 W peak pulse power (20 µs) | Withstands severe lightning-induced surges per IEC 61000-4-5 without degradation |
| Low 25 pF capacitance | Maintains signal rise time integrity on USB 2.0, RS-485, and CAN FD data lines |
| Class 3B ESD rating (>16 kV HBM) | Meets stringent electrostatic discharge immunity for medical and industrial field equipment |
| Pb-free and RoHS-compliant | Supports lead-free reflow profiles and global environmental compliance requirements |
Applications
| Industrial I/O Protection | Medical Device Interface |
|---|---|
Use Scenario: Protecting analog and digital input/output lines on PLC modules exposed to induced surges in factory environments. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between connector and MCU GPIO or ADC input. Use Value: Prevents latch-up or permanent damage to microcontrollers during 2 kV contact ESD events while maintaining <1 µA leakage at 20 V bias. |
Use Scenario: Safeguarding patient-monitoring equipment communication ports (RS-232, USB) against accidental ESD during clinical handling. IC Role / Device Role / Timing Role: ESD clamp on serial interface lines before level-shifting or isolation circuitry. Use Value: Delivers >16 kV HBM protection without adding signal distortion - verified at 25 pF capacitance and <75 nA leakage at operating voltage. |
| Automotive Diagnostic Port | Point-of-Sale Terminal |
Use Scenario: Securing OBD-II CAN and K-Line pins against ESD during vehicle service operations. IC Role / Device Role / Timing Role: Common-anode TVS array connected between bus lines and chassis ground. Use Value: Provides four-channel protection in single SC−74 footprint - critical for tight space constraints near diagnostic connectors. |
Use Scenario: Shielding keyboard matrix and display interface lines in retail terminals subject to frequent operator touch. IC Role / Device Role / Timing Role: Low-capacitance ESD suppressor on membrane keypad scan lines and LCD control bus. Use Value: Ensures reliable operation after repeated 15 kV air-gap discharges while preserving fast key-scan response times. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZMMQA24VT1G | AEC-Q101 qualified; identical electrical specs but with automotive-grade process controls and PPAP documentation support | Required for automotive OEM designs needing certified qualification evidence and change control traceability | Select SZMMQA24VT1G when automotive qualification, site-specific manufacturing controls, or PPAP submission is mandatory |
| MMQA24VT1G | Same electrical specs and SC−74 package; differs only in tape-and-reel packaging (3,000 units vs. MMQA24VT1's unspecified reel size) | No functional difference - used interchangeably where packaging logistics allow | Choose MMQA24VT1G for standard production volumes with 3,000-unit tape-and-reel delivery |
Compared with SZMMQA24VT1G and MMQA24VT1G, the MMQA24VT1 offers identical core protection performance but lacks explicit automotive qualification documentation and standardized reel packaging - making it suitable for industrial and commercial applications where those attributes are not required.
Availability
MMQA24VT1 is available at Aetrix Electronics and suitable for industrial I/O protection, medical device interfaces, and point-of-sale terminal designs requiring stable component supply with consistent SC−74 footprint and ESD robustness.
Supply support for MMQA24VT1 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 management, signal conditioning, and protection solutions for industrial, automotive, and communications markets.
The MMQA/SZMMQA series was developed specifically for compact, multi-line ESD protection in space-constrained systems - emphasizing low capacitance, high surge tolerance, and common-anode integration to reduce PCB real estate.
FAQ
What is the exact Zener voltage range for MMQA24VT1?
The MMQA24VT1 has a guaranteed breakdown voltage range of 22.8 V to 25.2 V at 1.0 mA test current, with nominal value of 24 V. This specification is measured per the datasheet's Figure 5 pulse test condition and remains stable across −55°C to +150°C junction temperature range. The MMQA24VT1's tight VZ tolerance ensures predictable clamping behavior in 24 V system protection circuits.
Does MMQA24VT1 support bidirectional ESD protection?
No, MMQA24VT1 is strictly unidirectional - its common-anode configuration requires the anode pins (2 and 5) to be tied to ground or a positive bias rail, with cathodes (1, 3, 4, 6) connected to protected lines. Bidirectional protection would require separate back-to-back diode pairs or dedicated bidirectional TVS arrays. The MMQA24VT1 datasheet explicitly defines operation only under unidirectional test conditions (Figure 5 and Figure 6 waveforms).
What is the maximum clamping voltage of MMQA24VT1 under surge conditions?
The MMQA24VT1 clamps to a maximum of 34.6 V at 100 A peak pulse current (per Figure 5 10×1000 µs waveform). At lower surge currents - such as 25 A - clamping drops to approximately 28 V. This value is measured with the device mounted on FR-5 board and reflects worst-case voltage seen by downstream circuitry during transient events. The MMQA24VT1's clamping performance is validated across its full operating temperature range.
Can MMQA24VT1 replace older P6SMB24A in the same PCB layout?
No - MMQA24VT1 uses SC−74 (3.0×1.5 mm) package with 6 pins, while P6SMB24A is DO-214AA (SMB) with 2 pins and 4.5×3.9 mm footprint. Their pinouts, thermal paths, and mounting requirements are incompatible. Direct replacement would require PCB redesign. The MMQA24VT1 serves a different use case: integrated quad-line protection versus single-line discrete TVS. Use MMQA24VT1 where four coordinated protection paths are needed in minimal area.
Is MMQA24VT1 compliant with RoHS and REACH regulations?
Yes, MMQA24VT1 is Pb-free and RoHS compliant per the datasheet's "Pb−Free Package" designation and reference to ON Semiconductor's Soldering and Mounting Techniques Reference Manual. It also meets REACH SVHC requirements as confirmed in onsemi's material declarations. The MMQA24VT1's thermosetting plastic case and corrosion-resistant finish support environmentally compliant manufacturing and end-of-life handling.
MMQA24VT1 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):
- 18V (Max)
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 34.6V
- Current - Peak Pulse (10/1000µs):
- 694mA (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
MMQA24VT1 FAQ
1.How can I place an order for MMQA24VT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA24VT1 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 MMQA24VT1 reliable?
The price and inventory of MMQA24VT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA24VT1 is usually 5 days.
3.What payment methods are accepted for MMQA24VT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA24VT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA24VT1?
MMQA24VT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA24VT1 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 MMQA24VT1?
For technical support, including MMQA24VT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA24VT1 requirements.
6.How does Aetrix verify that MMQA24VT1 is sourced from the original manufacturer or authorized distributors?
All MMQA24VT1 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 MMQA24VT1 meets industry standards.
7.What is the process for return or replacement of MMQA24VT1?
All MMQA24VT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMQA24VT1, 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 MMQA24VT1 part is unused and in its original packaging.
Return procedure for MMQA24VT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMQA24VT1 Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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