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onsemi MMQA22VT1G
- Part No.:
- MMQA22VT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA22VT1G.pdf
- Description:
- TVS DIODE 17VWM 31.7VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:4,691
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Product details
Overview
MMQA22VT1G from ON Semiconductor is a quad monolithic common-anode ESD protection diode designed for transient overvoltage suppression on four independent signal lines. It features a nominal Zener voltage of 22 V, maximum clamping voltage of 31.7 V at 17 A surge current, and ESD rating >16 kV per HBM Class 3B. It is used in compact I/O interfaces of printers, medical equipment, and communication systems where board space is constrained.
For engineers reviewing the MMQA22VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include unidirectional clamping performance, SC−74 package footprint efficiency, thermal derating on FR-5 vs. alumina substrates, and compatibility with 8 mm tape-and-reel automated assembly.
Technical Context
The MMQA22VT1G implements a quad-junction common-anode architecture in a single SC−74 package, enabling simultaneous protection of four separate lines without shared cathode routing constraints. Its unidirectional configuration requires external anode tie to system ground or bias rail, with each cathode (pins 1, 3, 4, 6) serving as an independent protected line input.
It delivers 24 W peak power handling at 1.0 ms pulse (Figure 5 waveform) and 150 W at 20 µs pulse (Figure 6 waveform), with junction-to-ambient thermal resistance of 556 °C/W on FR-5 board. Clamping voltage is specified at 31.7 V under 17 A peak surge current, and reverse leakage remains ≤75 nA at 17 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZT) | 20.9–23.1 V at 1.0 mA test current - defines precise DC breakdown threshold for overvoltage triggering |
| Clamping Voltage (VRSM) | 31.7 V at 17 A peak pulse - limits transient voltage seen by downstream ICs during ESD or surge events |
| Peak Pulse Power (PPK) | 24 W @ 1.0 ms, 150 W @ 20 µs - determines survivability against IEC 61000-4-2 and IEC 61000-4-5 transients |
| Reverse Leakage (IR) | ≤75 nA @ 17 V - ensures minimal signal distortion and power loss in high-impedance analog or logic lines |
| ESD Rating (HBM) | Class 3B (>16 kV) - qualifies for direct interface with human-accessible ports in industrial and medical equipment |
| Capacitance (CJ) | 22 pF @ 0 V, 1 MHz - low enough to avoid signal integrity degradation on USB 2.0 or RS-232 lines |
| Thermal Resistance (RJA) | 556 °C/W on FR-5 board - informs PCB copper area requirements for sustained power dissipation |
Pinout & Package
SC−74 (Case 318F−05) surface-mount package: 6-pin, void-free thermosetting plastic body, Pb-free, RoHS compliant, optimized for 8 mm tape-and-reel automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel A) | Protected signal line output - connects to I/O pin requiring ESD clamping to common anode |
| 2 | Anode (Common) | Shared anode node - must be tied to system ground or bias reference for all four channels |
| 3 | Cathode (Channel B) | Second protected signal line - electrically isolated from Channel A but shares anode return path |
| 4 | Cathode (Channel C) | Third protected signal line - enables compact multi-line protection without discrete diode arrays |
| 5 | Anode (Common) | Redundant anode connection - improves current sharing and reduces bond wire inductance |
| 6 | Cathode (Channel D) | Fourth protected signal line - completes quad-channel protection in 3.0 × 1.5 mm footprint |
Key Features
| Feature | Design Value |
|---|---|
| Quad common-anode integration | Four independent unidirectional ESD paths in one SC−74 package - reduces PCB area by ~75% vs. discrete diodes |
| High-energy pulse handling | 150 W peak power at 20 µs pulse width - supports robust protection against IEC 61000-4-5 Level 3 surges |
| Low-clamp, low-leakage design | 31.7 V clamping at 17 A + ≤75 nA leakage at 17 V - preserves signal fidelity while limiting fault voltage |
| Pb-free, RoHS-compliant construction | Meets J-STD-020 moisture sensitivity level 1 - enables standard reflow without special baking or handling |
| AEC-Q101 qualified variant available | SZMMQA22VT1G version supports automotive applications with PPAP documentation and site-specific controls |
Applications
| Computer Keyboard Interface | Medical Device I/O Port |
|---|---|
Use Scenario: Protecting matrix scan lines in compact keyboard controllers exposed to frequent human contact. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between microcontroller GPIO and mechanical switch nodes. Use Value: Prevents ESD-induced latch-up or damage to MCU inputs while maintaining <22 pF capacitance for reliable key scan timing. |
Use Scenario: Safeguarding serial communication lines (RS-232/RS-485) on patient-monitor front panels. IC Role / Device Role / Timing Role: Common-anode clamp on TX/RX/CTS/RTS lines referenced to chassis ground. Use Value: Enables single-package protection of four bidirectional lines without compromising signal rise time or noise margin. |
| Industrial Printer Control Bus | Embedded Communication Module |
Use Scenario: Shielding parallel data/address bus lines in thermal label printers subject to operator ESD events. IC Role / Device Role / Timing Role: Quad-channel line protector on 8-bit data bus with shared ground return. Use Value: Eliminates need for four discrete SOD-323 diodes, reducing layout complexity and improving trace length matching. |
Use Scenario: Securing UART, I²C, and reset lines on cellular or LoRaWAN modules mounted on handheld devices. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on mixed-signal interface pins adjacent to RF sections. Use Value: Maintains 22 pF capacitance to avoid degrading I²C clock edge rates while meeting >16 kV HBM compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESDA6V1SC6 | Single-channel, 6.1 V Zener, 30 pF capacitance, 12 A surge rating | Requires four devices for quad-line protection; higher capacitance limits high-speed use | Preferred when channel isolation or different voltage rails justify discrete placement |
| SZMMQA24VT1G | 24 V nominal Zener, 34.6 V clamping at 18 A, identical SC−74 package and pinout | Higher clamping voltage suits 24 V logic or industrial control buses with wider tolerance margins | Select when system operating voltage exceeds 22 V or higher surge immunity is required |
Compared with ESDA6V1SC6, MMQA22VT1G reduces component count and PCB area by integrating four channels, while SZMMQA24VT1G offers a direct voltage-grade alternative with identical form factor and mounting - both require no layout revision but differ in clamping behavior and system voltage compatibility.
Availability
MMQA22VT1G is available at Aetrix Electronics and suitable for computer interface protection, medical device I/O hardening, and industrial printer control bus applications requiring stable component supply, consistent Pb-free compliance, and long-term lifecycle support.
Supply support for MMQA22VT1G 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 energy-efficient power management, analog, sensor, and ESD protection solutions for industrial, automotive, and computing markets.
The MMQA series was developed specifically for high-density, multi-line ESD protection in space-constrained consumer and medical electronics - emphasizing low capacitance, precise clamping, and quad integration in miniature packages.
FAQ
What is the exact Zener voltage tolerance of MMQA22VT1G?
The MMQA22VT1G has a guaranteed Zener voltage range of 20.9 V to 23.1 V at 1.0 mA test current, measured per JEDEC JESD22-A114. This ±5% tolerance ensures predictable turn-on behavior across temperature and production lots, critical for repeatable clamping in sensitive I/O circuits. The MMQA22VT1G maintains this specification over its full −55°C to +150°C junction temperature range.
Can MMQA22VT1G be used in bidirectional signal lines?
No - MMQA22VT1G is strictly unidirectional and requires the common anode (pins 2 and 5) to be tied to ground or a fixed reference voltage. For bidirectional protection, two MMQA22VT1G devices would be needed per line (anode-to-ground and anode-to-VCC), or a dedicated bidirectional array like the NUP4202MR6T1G should be selected. The MMQA22VT1G's internal structure does not support reverse-bias conduction.
What is the maximum continuous power dissipation for MMQA22VT1G on a standard FR-5 PCB?
On a standard FR-5 board (1.0 × 0.75 × 0.62 in.), the MMQA22VT1G has a total power dissipation limit of 225 mW at 25°C ambient, derating linearly above that temperature at 1.8 mW/°C. This value reflects steady-state thermal equilibrium and is distinct from its 24 W peak pulse rating. Exceeding 225 mW continuously risks exceeding the −55°C to +150°C junction temperature range and permanent degradation of the MMQA22VT1G.
Does MMQA22VT1G meet AEC-Q101 qualification?
The base MMQA22VT1G is not AEC-Q101 qualified; however, the SZMMQA22VT1G variant is fully AEC-Q101 qualified, PPAP capable, and manufactured under automotive-specific process controls. Both share identical electrical specs and SC−74 packaging, but only SZMMQA22VT1G carries the automotive grade designation and associated documentation. For automotive designs, always specify SZMMQA22VT1G - not MMQA22VT1G.
How does the dual-anode pin configuration (pins 2 and 5) affect layout?
The dual-anode configuration (pins 2 and 5) provides lower inductance and improved current sharing between the four cathodes, especially under fast-rising transients. Layout best practice is to connect both pins directly to a low-impedance ground plane using short, wide traces - not daisy-chained. This minimizes voltage overshoot during ESD events and ensures uniform clamping across all four channels of the MMQA22VT1G.
MMQA22VT1G 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):
- 17V (Max)
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 31.7V
- Current - Peak Pulse (10/1000µs):
- 758mA (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
MMQA22VT1G FAQ
1.How can I place an order for MMQA22VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA22VT1G 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 MMQA22VT1G reliable?
The price and inventory of MMQA22VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA22VT1G is usually 5 days.
3.What payment methods are accepted for MMQA22VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA22VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA22VT1G?
MMQA22VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA22VT1G 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 MMQA22VT1G?
For technical support, including MMQA22VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA22VT1G requirements.
6.How does Aetrix verify that MMQA22VT1G is sourced from the original manufacturer or authorized distributors?
All MMQA22VT1G 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 MMQA22VT1G meets industry standards.
7.What is the process for return or replacement of MMQA22VT1G?
All MMQA22VT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMQA22VT1G, 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 MMQA22VT1G part is unused and in its original packaging.
Return procedure for MMQA22VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMQA22VT1G Tags
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