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onsemi SZMMQA5V6T1G
- Part No.:
- SZMMQA5V6T1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
SZMMQA5V6T1G.pdf
- Description:
- TVS DIODE 3VWM 8VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:6,908
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Product details
Overview
SZMMQA5V6T1G from onsemi is a quad monolithic common-anode ESD protection diode designed for transient overvoltage suppression on four independent signal lines in space-constrained PCBs. It features a 5.6 V nominal Zener voltage (5.32–5.88 V), ≤2000 nA reverse leakage at 3.0 V, and clamps to ≤8.0 V at 3.0 A peak pulse current. Used in USB, keyboard, and microprocessor I/O interfaces where board area and ESD robustness are critical.
For engineers reviewing the SZMMQA5V6T1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, SC-74 package terminal mapping, real-world use cases in interface protection, and validated alternative parts with documented functional trade-offs.
Technical Context
This device implements four unidirectional Zener clamping junctions sharing a common anode (pins 2 and 5), enabling simultaneous protection of four signal lines against ESD transients per Human Body Model Class 3B (>16 kV). Its SC-74 package integrates all four channels without external routing, reducing parasitic inductance versus discrete solutions.
It operates within −55 °C to +150 °C junction temperature range, supports 24 W peak power dissipation at 1.0 ms pulse (Figure 5) and 150 W at 20 µs pulse (Figure 6), and maintains low capacitance (unspecified but typical <100 pF at 0 V bias per family data) for high-speed signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.6 V (min 5.32 V, max 5.88 V at 1.0 mA) - sets precise clamping threshold for 5 V logic rails |
| Maximum Clamping Voltage | 8.0 V at 3.0 A peak pulse - limits downstream IC stress during IEC 61000-4-2 contact discharge |
| Reverse Leakage Current | ≤2000 nA at 3.0 V - ensures negligible standby power loss and signal integrity in high-impedance nodes |
| ESD Rating | Class 3B per HBM (>16 kV) - meets industrial and computing equipment immunity requirements |
| Peak Pulse Power | 150 W at 20 µs (Figure 6 waveform) - handles fast, high-energy ESD events without degradation |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in automotive under-hood and industrial control environments |
| Package | SC-74 (Case 318F) - 6-pin surface-mount package occupying <2.5 mm² footprint for ultra-dense layouts |
Pinout & Package
SC-74 package (Case 318F, Style 1) is a 6-pin, void-free thermosetting plastic surface-mount case optimized for automated assembly and high-density PCBs. Pin 1 and Pin 3–4–6 are cathodes; Pins 2 and 5 are shared anodes - enabling four independent unidirectional clamp paths (1–2, 3–2, 4–5, 6–5).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Clamp path #1 cathode - connects to protected line A; pairs with Pin 2 anode |
| 2 | Anode | Common anode for clamp paths #1 and #2 - ties to local ground or reference plane |
| 3 | Cathode | Clamp path #2 cathode - connects to protected line B; pairs with Pin 2 anode |
| 4 | Cathode | Clamp path #3 cathode - connects to protected line C; pairs with Pin 5 anode |
| 5 | Anode | Common anode for clamp paths #3 and #4 - second ground connection point for layout flexibility |
| 6 | Cathode | Clamp path #4 cathode - connects to protected line D; pairs with Pin 5 anode |
Key Features
| Feature | Design Value |
|---|---|
| Quad common-anode architecture | Four independent unidirectional ESD clamps in one SC-74 package - eliminates four discrete diodes and saves >70% board area |
| 150 W peak pulse capability (20 µs) | Withstands high-energy ESD transients without failure - exceeds IEC 61000-4-2 Level 4 (8 kV contact / 15 kV air) |
| AEC-Q101 qualified | Validated for automotive applications including infotainment I/O and body control modules - supports PPAP documentation |
| Pb-Free and RoHS compliant | Meets global environmental regulations and reflow soldering standards up to 260 °C peak temperature |
| Low clamping voltage (8.0 V @ 3 A) | Protects 5 V logic ICs (e.g., USB transceivers, GPIOs) by limiting voltage overshoot below absolute maximum ratings |
Applications
| USB 2.0 Interface Protection | Keyboard/Mouse I/O Protection |
|---|---|
Use Scenario: Protecting D+ and D− data lines plus VBUS and ID pins in compact USB peripheral designs. IC Role / Device Role / Timing Role: Unidirectional ESD suppressor placed directly at connector entry point to shunt transients before reaching USB PHY. Use Value: Prevents latch-up or gate oxide damage in USB transceivers while maintaining signal integrity via low capacitance and matched differential pair layout. |
Use Scenario: Shielding matrix scan lines and interrupt lines in thin-profile keyboards and pointing devices. IC Role / Device Role / Timing Role: Common-anode quad clamp isolating four key-scan rows/columns from ESD events during user contact. Use Value: Eliminates need for four separate SOD-323 diodes - reduces component count, placement cost, and routing congestion on 4-layer boards. |
| Microprocessor I/O Bus Protection | Industrial Serial Interface Protection |
Use Scenario: Safeguarding address/data/control bus lines (e.g., GPIO, SPI, I²C) on embedded controllers in medical or test equipment. IC Role / Device Role / Timing Role: Localized transient suppressor mounted adjacent to CPU or FPGA I/O banks to minimize trace inductance. Use Value: Ensures system-level ESD immunity without degrading rise/fall times - clamps within 1 ns to preserve timing margins on 10–50 MHz buses. |
Use Scenario: Hardening RS-232/RS-485 transceiver I/O pins in factory automation panels exposed to frequent operator handling. IC Role / Device Role / Timing Role: Front-end protection element absorbing contact discharge before signals reach level-shifting or isolation circuitry. Use Value: Extends field reliability by preventing cumulative degradation of transceiver inputs - validated for >100,000 ESD events per pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD5Z5.0T1G | Single-channel, same 5.0 V nominal voltage, lower 12 W peak power (1.0 ms), smaller SOD-523 package | Requires four separate placements vs. single quad solution - increases layout complexity and total footprint | Preferred when only one line needs protection or when board space allows discrete placement |
| CM1213A-04SO | Quad common-anode, 5.5 V clamping, 12 A surge rating, SO-16 package - larger footprint but higher thermal mass | SO-16 requires more PCB area and lacks AEC-Q101 qualification - limited to commercial-grade systems | Chosen when higher surge current handling (12 A vs. 3 A) is required and automotive compliance is not mandatory |
Compared with SZMMQA5V6T1G, ESD5Z5.0T1G offers lower integration and reduced pulse handling, while CM1213A-04SO provides greater surge margin at the cost of size and automotive qualification - making SZMMQA5V6T1G optimal for space-constrained, AEC-Q101–compliant 5 V interface protection.
Availability
SZMMQA5V6T1G is available at Aetrix Electronics and suitable for USB interface protection, keyboard/mouse I/O hardening, and microprocessor bus safeguarding requiring stable component supply across production lifecycles.
Supply support for SZMMQA5V6T1G 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 is a global semiconductor supplier specializing in energy-efficient technologies for automotive, industrial, cloud, and IoT applications - delivering high-reliability components with rigorous quality systems.
SZMMQA5V6T1G belongs to the MMQA/SZMMQA Quad Common Anode Series, engineered specifically for compact, multi-line ESD protection in computing peripherals, human interface devices, and automotive infotainment systems.
FAQ
What is the exact Zener voltage tolerance of SZMMQA5V6T1G?
The SZMMQA5V6T1G has a specified breakdown voltage range of 5.32 V to 5.88 V at 1.0 mA test current, with a nominal value of 5.6 V. This ±5% tolerance ensures reliable clamping on standard 5 V logic rails while accommodating process variation and temperature drift across its −55 °C to +150 °C operating range.
Is SZMMQA5V6T1G qualified for automotive applications?
Yes, SZMMQA5V6T1G carries the "SZ" prefix indicating it is AEC-Q101 qualified and PPAP capable. It undergoes stress testing for temperature cycling, humidity, and ESD robustness required for automotive infotainment, body control, and ADAS interface modules - confirmed in the official onsemi datasheet revision 13.
How does the dual-anode configuration (Pins 2 and 5) function in SZMMQA5V6T1G?
The SZMMQA5V6T1G uses two internal common anodes (Pins 2 and 5) to form two independent dual-cathode clamp groups: Pins 1+3 share Pin 2, and Pins 4+6 share Pin 5. This allows flexible PCB routing - each anode can connect to separate ground nets or split-plane references to reduce ground bounce in high-speed layouts.
What is the maximum peak pulse current SZMMQA5V6T1G can handle?
SZMMQA5V6T1G is rated for a maximum non-repetitive peak pulse current of 3.0 A under the Figure 5 waveform (10 × 1000 µs) and 12 A under the Figure 6 waveform (8 × 20 µs), with corresponding clamping voltages of 8.0 V and ~15 V respectively - values confirmed in the Electrical Characteristics table on page 2 of the datasheet.
Does SZMMQA5V6T1G require external biasing or series resistance?
No, SZMMQA5V6T1G operates passively as a Zener-based clamp and requires no external biasing. A series current-limiting resistor is recommended between the protected line and the cathode to manage steady-state fault current, but the device itself functions without any active drive or control signals - simplifying design and reducing BOM count.
SZMMQA5V6T1G 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):
- 3V (Max)
- Voltage - Breakdown (Min):
- 5.32V
- Voltage - Clamping (Max) @ Ipp:
- 8V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 150W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
SZMMQA5V6T1G FAQ
1.How can I place an order for SZMMQA5V6T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMQA5V6T1G 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 SZMMQA5V6T1G reliable?
The price and inventory of SZMMQA5V6T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMQA5V6T1G is usually 5 days.
3.What payment methods are accepted for SZMMQA5V6T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMQA5V6T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMQA5V6T1G?
SZMMQA5V6T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMQA5V6T1G 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 SZMMQA5V6T1G?
For technical support, including SZMMQA5V6T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMQA5V6T1G requirements.
6.How does Aetrix verify that SZMMQA5V6T1G is sourced from the original manufacturer or authorized distributors?
All SZMMQA5V6T1G 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 SZMMQA5V6T1G meets industry standards.
7.What is the process for return or replacement of SZMMQA5V6T1G?
All SZMMQA5V6T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMQA5V6T1G, 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 SZMMQA5V6T1G part is unused and in its original packaging.
Return procedure for SZMMQA5V6T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMQA5V6T1G Tags
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