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onsemi MMQA24VT1G
- Part No.:
- MMQA24VT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA24VT1G.pdf
- Description:
- TVS DIODE 18VWM 34.6VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:2,319
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Product details
Overview
MMQA24VT1G from ON Semiconductor is a quad monolithic common-anode ESD protection diode in SC−74 package, with 24 V nominal Zener voltage (22.8–25.2 V), 100 A max reverse surge current, and 34.6 V clamping voltage at peak pulse current. It protects four I/O lines simultaneously in space-constrained interfaces such as USB, HDMI, and keyboard controllers.
For engineers reviewing the MMQA24VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include unidirectional clamping performance, 150 W peak power @ 20 µs, Class 3B ESD rating (>16 kV HBM), 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 independent cathodes-enabling four separate unidirectional TVS paths in one package. Its silicon construction delivers low leakage (<75 nA) and stable temperature coefficient (0.694 mV/°C) across −55°C to +150°C.
The MMQA24VT1G is optimized for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), with clamping validated at 34.6 V under 100 A 8/20 µs surge. Thermal resistance is 556 °C/W on FR-5 board, supporting reliable operation up to 225 mW continuous dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZT) | 24 V nominal (22.8–25.2 V range); defines precise clamping threshold for 24 V rail protection |
| Clamping Voltage (VRSM) | 34.6 V at 100 A surge; limits downstream voltage stress during fast transients |
| Peak Pulse Power | 150 W @ 20 µs waveform; handles high-energy EFT pulses without failure |
| ESD Rating (HBM) | Class 3B (>16 kV); exceeds IEC 61000-4-2 Level 4 immunity requirements |
| Leakage Current (IR) | <75 nA @ 19.2 V; ensures minimal signal loading on high-impedance data lines |
| Capacitance @ 0 V | 25 pF; preserves signal integrity on <100 MHz digital interfaces like UART and SPI |
| Junction Temp Range | −55°C to +150°C; supports industrial and automotive under-hood environments |
Pinout & Package
SC−74 (Case 318F) surface-mount package: 6-pin, void-free thermosetting plastic body, Pb-free and RoHS compliant, optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Channel A) | Independent protected line terminal; connects to first I/O trace (e.g., USB D+) |
| Pin 2 | Anode (Common) | Shared anode node for Channels A, B, C, D; ties to system ground or bias rail |
| Pin 3 | Cathode (Channel B) | Independent protected line terminal; connects to second I/O trace (e.g., USB D−) |
| Pin 4 | Cathode (Channel C) | Independent protected line terminal; connects to third I/O trace (e.g., VBUS sense) |
| Pin 5 | Anode (Common) | Redundant common anode connection; improves current sharing and thermal distribution |
| Pin 6 | Cathode (Channel D) | Independent protected line terminal; connects to fourth I/O trace (e.g., ID pin) |
Key Features
| Feature | Design Value |
|---|---|
| Quad common-anode architecture | Four independent unidirectional TVS paths share two anode pins-reducing component count and PCB area by 75% vs. discrete diodes |
| 150 W peak pulse power (20 µs) | Withstands high-energy surges from IEC 61000-4-4 EFT testing without degradation or latch-up |
| 25 pF capacitance @ 0 V | Enables use on high-speed interfaces up to 100 MHz without signal rise-time distortion or jitter |
| Class 3B ESD immunity (>16 kV HBM) | Meets stringent end-equipment ESD robustness requirements for consumer and industrial USB peripherals |
| −55°C to +150°C operating range | Validated for deployment in automotive infotainment head units and industrial PLC I/O modules |
Applications
| USB Interface Protection | HDMI Hot-Plug Detection |
|---|---|
Use Scenario: Protecting USB 2.0 data lines (D+, D−), VBUS, and ID pins against ESD events during cable insertion/removal. IC Role / Device Role / Timing Role: Unidirectional TVS diode array providing low-capacitance, low-clamping overvoltage protection on four differential and supply lines. Use Value: Prevents damage to USB transceivers and PHYs while maintaining signal integrity (25 pF) and meeting USB-IF ESD test requirements. | Use Scenario: Safeguarding HDMI hot-plug detect (HPD), clock (TMDS CLK), and data channels (TMDS DATA0/1) from contact ESD. IC Role / Device Role / Timing Role: Quad-channel transient suppressor with matched clamping thresholds ensuring simultaneous protection of all critical HDMI pins. Use Value: Eliminates need for four separate SOD-323 devices, reducing layout complexity and enabling compact HDMI receptacle designs. |
| Industrial Keypad Interface | Automotive Infotainment I/O |
Use Scenario: Shielding membrane keypad scan lines and microcontroller GPIOs from user-induced ESD in factory HMIs and medical control panels. IC Role / Device Role / Timing Role: Common-anode ESD clamp routing four mechanical switch inputs to MCU port pins with shared ground return. Use Value: Achieves >16 kV HBM protection with sub-100 ns response time, preventing false keypresses and MCU resets during field use. | Use Scenario: Protecting CAN FD transceiver I/O, audio codec lines, and touch controller signals in automotive infotainment head units. IC Role / Device Role / Timing Role: AEC-Q101 qualified transient suppressor delivering robust ESD immunity across extended temperature range (−40°C to +125°C). Use Value: Supports PPAP compliance and eliminates field failures due to electrostatic discharge in vehicle cabin environments. |
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 variant with automotive-grade process controls and PPAP documentation support; identical electrical specs and pinout | Required for automotive OEM designs requiring certified qualification and change control traceability | Select SZMMQA24VT1G when automotive qualification (AEC-Q101) and PPAP compliance are mandatory |
| MMQA24WT1G | Same SC−74 package and quad common-anode structure but rated for 24 W @ 1.0 ms (vs. 150 W @ 20 µs); lower surge energy handling | Suitable for lower-energy ESD-only scenarios; not recommended for IEC 61000-4-4 EFT or lightning-induced surges | Choose MMQA24WT1G only for cost-sensitive consumer electronics with basic HBM protection needs and no EFT requirement |
Compared with SZMMQA24VT1G, the MMQA24VT1G offers identical protection performance but lacks automotive qualification documentation; versus MMQA24WT1G, it provides 6.25× higher surge energy tolerance (150 W vs. 24 W), making it suitable for industrial and harsh-environment deployments.
Availability
MMQA24VT1G is available at Aetrix Electronics and suitable for USB interface protection, HDMI hot-plug circuits, industrial keypad systems, and automotive infotainment I/O requiring stable component supply and long-term production continuity.
Supply support for MMQA24VT1G 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 is a global semiconductor manufacturer specializing in power management, analog, sensor, and protection solutions for automotive, industrial, and consumer markets.
The MMQA series belongs to ON Semiconductor's ESD and transient voltage suppression product line, engineered specifically for high-density, multi-line I/O protection in space-constrained electronic systems.
FAQ
What is the clamping voltage of MMQA24VT1G at its maximum rated surge current?
The MMQA24VT1G has a maximum clamping voltage (VRSM) of 34.6 V at 100 A peak pulse current under the 8 × 20 µs waveform per Figure 6. This value is measured with the device biased in unidirectional configuration using Pins 2 and 5 as common anodes. The MMQA24VT1G maintains this clamping performance across its full operating temperature range (−55°C to +150°C), ensuring consistent protection in demanding environments.
Is MMQA24VT1G suitable for bidirectional signal lines such as RS-485 or CAN bus?
No, the MMQA24VT1G is a unidirectional ESD protection device designed for common-anode configuration and is not suitable for bidirectional differential buses. Its internal structure supports only forward-biased clamping from cathode to anode. For RS-485 or CAN applications requiring symmetrical surge suppression, a dedicated bidirectional TVS array such as NUP4105MR6T1G must be used instead of MMQA24VT1G.
Does MMQA24VT1G require external biasing or current-limiting resistors?
No, the MMQA24VT1G operates passively and requires no external biasing or current-limiting components. It functions as a shunt device that conducts only during overvoltage events exceeding its breakdown voltage (22.8–25.2 V). Its low leakage (<75 nA at 19.2 V) ensures negligible impact on normal circuit operation, and the MMQA24VT1G is designed for direct placement between protected line and ground or common anode rail.
What is the thermal resistance (RJA) of MMQA24VT1G on a standard FR-5 PCB?
The MMQA24VT1G has 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 inches). This value assumes natural convection cooling and is used to calculate steady-state temperature rise under continuous power dissipation. The MMQA24VT1G's RJA improves to 417 °C/W when mounted on an alumina substrate, supporting higher reliability in thermally demanding applications.
Can MMQA24VT1G replace discrete 1N4448-type diodes for ESD protection?
No, the MMQA24VT1G is not a general-purpose rectifier and cannot substitute for 1N4448 diodes. It is a specialized transient voltage suppressor with controlled Zener breakdown, low clamping voltage, and high surge current capability-features absent in switching diodes. Using MMQA24VT1G in place of 1N4448 would result in unintended conduction and circuit malfunction; the MMQA24VT1G serves exclusively as an ESD/TVS device, not as a signal rectifier or logic-level shifter.
MMQA24VT1G 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
MMQA24VT1G FAQ
1.How can I place an order for MMQA24VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA24VT1G 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 MMQA24VT1G reliable?
The price and inventory of MMQA24VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA24VT1G is usually 5 days.
3.What payment methods are accepted for MMQA24VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA24VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA24VT1G?
MMQA24VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA24VT1G 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 MMQA24VT1G?
For technical support, including MMQA24VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA24VT1G requirements.
6.How does Aetrix verify that MMQA24VT1G is sourced from the original manufacturer or authorized distributors?
All MMQA24VT1G 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 MMQA24VT1G meets industry standards.
7.What is the process for return or replacement of MMQA24VT1G?
All MMQA24VT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMQA24VT1G, 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 MMQA24VT1G part is unused and in its original packaging.
Return procedure for MMQA24VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMQA24VT1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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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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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
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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