My Inquiry
My Account
onsemi MMQA5V6T1
- Part No.:
- MMQA5V6T1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
MMQA5V6T1.pdf
- Description:
- TVS DIODE 3VWM 8VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:4,698
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMQA5V6T1 from ON Semiconductor 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 nominal Zener voltage of 5.6 V, clamping voltage of 8.0 V at 3.0 A peak surge current, and ESD rating exceeding 16 kV per Human Body Model (HBM Class 3B), used in USB, keyboard, and microprocessor I/O interfaces.
For engineers reviewing the MMQA5V6T1 datasheet, pinout, applications, or equivalent options, key selection considerations include unidirectional clamping performance, SC−74 package footprint efficiency, low leakage (<2000 nA), thermal derating on FR-5 board, and compatibility with automated SMT assembly.
Technical Context
The MMQA5V6T1 implements a quad-junction common-anode silicon structure in a single SC−74 package, enabling four independent unidirectional ESD protection paths sharing one anode node. Each cathode–anode pair provides discrete Zener-based clamping with breakdown voltage tightly specified at 5.32–5.88 V and dynamic impedance ≤400 Ω at test current.
It delivers 24 W peak power dissipation (1.0 ms pulse) and 150 W (20 µs pulse), with thermal resistance of 556 °C/W on FR-5 board. The device operates across −55 to +150 °C junction temperature and supports Pb-free reflow up to 260 °C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZT) | 5.6 V nominal (min 5.32 V, max 5.88 V @ 1.0 mA); defines precise clamping threshold for 5 V logic rails. |
| Clamping Voltage (VRSM) | 8.0 V max @ 3.0 A peak pulse; ensures protected ICs see <8 V during ESD transients. |
| Peak Pulse Power | 24 W @ 1.0 ms (Figure 5 waveform); sustains short-duration surges without failure. |
| ESD Rating (HBM) | Class 3B (>16 kV); exceeds IEC 61000-4-2 Level 4 immunity requirements. |
| Reverse Leakage (IR) | 2000 nA max @ 3.0 V; minimizes standby current draw in always-on interfaces. |
| Junction Capacitance | Not specified in datasheet for MMQA5V6T1; typical family values range 100–250 pF at 0 V bias. |
| Thermal Resistance (RJA) | 556 °C/W on FR-5 board; determines safe power derating above 25 °C ambient. |
Pinout & Package
MMQA5V6T1 uses the SC−74 (Case 318F) surface-mount package - 3.0 mm × 1.5 mm × 1.0 mm body, 6-pin leadframe, Pb-free, optimized for high-density automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel A) | ESD current sink path for first protected line; connects to I/O trace before clamp point. |
| 2 | Anode (Common) | Shared anode node tied to ground or local reference; enables compact 4-line protection topology. |
| 3 | Cathode (Channel B) | Independent cathode for second signal line; electrically isolated from Pin 1 except via common anode. |
| 4 | Cathode (Channel C) | Third dedicated cathode; allows simultaneous protection of parallel buses (e.g., data/address lines). |
| 5 | Anode (Common) | Second anode terminal - redundant connection to same internal node as Pin 2 for lower inductance grounding. |
| 6 | Cathode (Channel D) | Fourth cathode; completes quad-channel configuration for full I/O port or connector protection. |
Key Features
| Feature | Design Value |
|---|---|
| Quad Common-Anode Architecture | Four independent unidirectional clamps share one grounded anode node, reducing component count and PCB area by 75% vs. discrete diodes. |
| High Surge Robustness | 24 W (1 ms) and 150 W (20 µs) peak power handling enables reliable protection against IEC 61000-4-2 contact/air discharge events. |
| HBM Class 3B ESD Rating | Withstands >16 kV human-body-model discharges - meets stringent industrial and computing interface immunity standards. |
| Low-Leakage Zener Operation | 2000 nA max reverse leakage at 3.0 V ensures minimal impact on high-impedance sensor or analog signal lines. |
| SC−74 Footprint Efficiency | 6-pin, 3.0 × 1.5 mm outline fits dense layouts; compatible with standard 8 mm tape-and-reel SMT pick-and-place equipment. |
Applications
| USB 2.0 Interface Protection | Keyboard/Mouse I/O Protection |
|---|---|
|
Use Scenario: Protecting D+ and D− data lines, VBUS, and ID pins of USB connectors against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between connector and USB transceiver, with common anode grounded to system GND plane. Use Value: Prevents latch-up or damage to USB PHY ICs while maintaining signal integrity - clamping occurs within nanoseconds at <8 V. |
Use Scenario: Safeguarding matrix scan lines and interrupt lines in PC peripheral keyboards and optical mice exposed to user-handling ESD. IC Role / Device Role / Timing Role: Quad-channel transient suppressor applied across row/column I/O pins of microcontroller GPIO bank driving mechanical switches or sensors. Use Value: Eliminates need for four separate SOD-323 diodes; reduces BOM count and routing congestion on compact HID PCBs. |
| Microprocessor Bus Protection | Industrial Serial Interface Protection |
|
Use Scenario: Shielding address/data/control bus lines (e.g., between CPU and RAM/ROM) from board-level ESD coupling during handling or operation. IC Role / Device Role / Timing Role: Common-anode clamp array connected between each bus line and ground, leveraging shared anode to minimize ground loop inductance. Use Value: Maintains fast edge rates on 5 V TTL-compatible buses due to low dynamic impedance (<400 Ω) and absence of series resistance. |
Use Scenario: Hardening RS-232/RS-485 transceiver I/O pins in factory automation controllers subjected to cable-discharge events. IC Role / Device Role / Timing Role: Low-capacitance ESD suppressor placed at connector entry point, with cathodes tied to TX/RX/DE/RE lines and anode to chassis ground. Use Value: Provides robust 16 kV HBM immunity without degrading signal rise/fall times - verified in typical 20–33 V Zener variants of same family. |
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 SOD-523; 5.0 V nominal Zener; 12 W peak power (1 ms); 15 pF capacitance. | Requires four devices for quad-line protection; higher total board area and solder joints. | Select when discrete layout control or lower capacitance is prioritized over space savings. |
| SZMMQA5V6T1G | Automotive-grade variant; AEC-Q101 qualified; identical electrical specs and SC−74 package. | Required for automotive infotainment or ADAS modules needing PPAP documentation and extended temperature validation. | Choose SZMMQA5V6T1G for automotive programs; MMQA5V6T1 suffices for commercial/industrial use. |
Compared with ESD5Z5.0T1G, MMQA5V6T1 reduces component count and layout complexity for multi-line interfaces but trades off individual channel flexibility; versus SZMMQA5V6T1G, it lacks AEC-Q101 certification yet offers identical clamping performance and footprint for non-automotive designs.
Availability
MMQA5V6T1 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 industrial, computing, and medical electronics programs.
Supply support for MMQA5V6T1 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, sensing, and protection solutions for automotive, industrial, and computing 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 consumer and industrial electronics.
FAQ
What is the Zener voltage tolerance of MMQA5V6T1?
The MMQA5V6T1 has a guaranteed Zener voltage range of 5.32 V to 5.88 V at 1.0 mA test current, with 5.6 V as the nominal value. This ±5% tolerance ensures consistent clamping behavior across production lots and supports reliable interfacing with 5 V logic systems without undershoot or overshoot risks.
Does MMQA5V6T1 support bidirectional ESD protection?
No, MMQA5V6T1 is a unidirectional ESD protection diode configured as a common-anode quad Zener array. It protects only against positive transients on cathode lines relative to the grounded anode. For bidirectional protection, external series diodes or dedicated bidirectional arrays like NUP4105MR6T1 would be required.
What is the maximum operating temperature for MMQA5V6T1?
The MMQA5V6T1 has a junction and storage temperature range of −55 °C to +150 °C. Its thermal resistance of 556 °C/W on FR-5 board means continuous power dissipation must be derated above 25 °C ambient - for example, to ~1.3 mW at 100 °C ambient per Figure 4.
Can MMQA5V6T1 be used in automotive applications?
The standard MMQA5V6T1 is not AEC-Q101 qualified. For automotive use, the SZMMQA5V6T1G variant - identical in electrical and mechanical specs but certified to AEC-Q101 and PPAP capable - must be selected to meet functional safety and qualification requirements in vehicle systems.
How is the common anode implemented internally in MMQA5V6T1?
MMQA5V6T1 integrates four separate P-N junctions sharing a single internal anode node, brought out to Pins 2 and 5. This monolithic quad structure eliminates inter-device parameter mismatches and ensures matched clamping thresholds across all four channels - critical for balanced protection of differential or parallel signal groups.
MMQA5V6T1 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
MMQA5V6T1 FAQ
1.How can I place an order for MMQA5V6T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMQA5V6T1 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 MMQA5V6T1 reliable?
The price and inventory of MMQA5V6T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMQA5V6T1 is usually 5 days.
3.What payment methods are accepted for MMQA5V6T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMQA5V6T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMQA5V6T1?
MMQA5V6T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMQA5V6T1 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 MMQA5V6T1?
For technical support, including MMQA5V6T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMQA5V6T1 requirements.
6.How does Aetrix verify that MMQA5V6T1 is sourced from the original manufacturer or authorized distributors?
All MMQA5V6T1 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 MMQA5V6T1 meets industry standards.
7.What is the process for return or replacement of MMQA5V6T1?
All MMQA5V6T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMQA5V6T1, 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 MMQA5V6T1 part is unused and in its original packaging.
Return procedure for MMQA5V6T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMQA5V6T1 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
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
