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onsemi MA3075WALT1G
- Part No.:
- MA3075WALT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MA3075WALT1G.pdf
- Description:
- TVS DIODE 6.5VWM SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,091
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Product details
Overview
MA3075WALT1G from onsemi is a dual common-anode Zener ESD protection diode in SOT-23 package, designed for transient overvoltage and electrostatic discharge protection of two signal lines. It features 7.2–7.9 V breakdown voltage at 5 mA, <1 µA reverse leakage at 5 V, 80 pF typical capacitance at 0 V/1 MHz, and meets 16 kV HBM / 30 kV IEC 61000-4-2 air & contact ESD standards. It is used in space-constrained interfaces of computers, communication systems, and medical equipment.
For engineers reviewing the MA3075WALT1G datasheet, pinout, applications, or equivalent options, key selection criteria include dual-line unidirectional clamping capability, low capacitance for high-speed data lines, AEC-Q101 qualification (SZ variant), Pb-free RoHS compliance, and SOT-23 footprint compatibility with automated assembly.
Technical Context
This device integrates two monolithic silicon Zener junctions sharing a common anode terminal, enabling independent clamping of two separate signal paths to ground via cathodes. Its design targets low-capacitance transient suppression without compromising ESD robustness or thermal derating performance.
The 7.5 V nominal Zener voltage (7.2–7.9 V range) provides reliable turn-on for protecting 5 V logic interfaces, while its 15 W peak pulse power rating (100 µs) and 225 mW steady-state dissipation support sustained surge handling. Thermal resistance is 556 °C/W on FR-5 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 7.2–7.9 V @ 5 mA - defines clamping threshold for 5 V system protection |
| Peak Pulse Power | 15 W @ 100 µs - handles IEC 61000-4-2 ESD surges without failure |
| Capacitance | 80 pF @ 0 V, 1 MHz - minimizes signal distortion on USB, HDMI, or UART lines |
| ESD Rating | 16 kV HBM / 30 kV air & contact discharge - exceeds IEC 61000-4-2 Level 4 |
| Reverse Leakage | <1 µA @ 5 V - ensures negligible standby current in protected circuits |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - enables high-density PCB layout |
Pinout & Package
SOT-23 package (Case 318, Style 12) with void-free thermosetting plastic case, corrosion-resistant finish, and optimized geometry for automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. Cathode | Clamping node for Line 1 | Connects to first protected signal line; conducts when voltage exceeds Zener breakdown |
| 2. Cathode | Clamping node for Line 2 | Connects to second protected signal line; enables dual-line protection in single footprint |
| 3. Anode | Common reference terminal | Internally tied to both Zener junctions; must be connected to system ground or reference plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode Zener topology | Protects two independent signal lines using one SOT-23 footprint, reducing BOM count and board area |
| Low 80 pF capacitance | Maintains signal integrity on high-speed interfaces up to ~100 MHz without added jitter or attenuation |
| 16 kV HBM / 30 kV IEC ESD rating | Meets industrial and automotive-level ESD immunity requirements without external circuitry |
| Pb-free, Halogen-free, RoHS-compliant | Supports environmentally regulated manufacturing and end-of-life compliance |
Applications
| USB 2.0 Data Lines | RS-232/RS-485 Transceivers |
|---|---|
|
Use Scenario: Protecting D+ and D− pins of USB 2.0 connectors against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional clamping diode array providing fast transient response (<1 ns) to divert ESD current to ground. Use Value: Prevents latch-up or damage to USB PHY ICs while maintaining <80 pF loading for full-speed 480 Mbps signaling. |
Use Scenario: Safeguarding differential bus lines in industrial serial communication nodes exposed to field ESD. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor with matched Zener characteristics for balanced clamping. Use Value: Ensures signal integrity across ±12 V RS-485 common-mode range while surviving 30 kV contact discharge per IEC 61000-4-2. |
| Medical Sensor Interfaces | Printer Engine Control Signals |
|
Use Scenario: Shielding analog sensor inputs (e.g., temperature, pressure) in Class II medical devices from operator-handling ESD. IC Role / Device Role / Timing Role: Low-leakage (<1 µA) Zener clamp preserving DC accuracy and offset stability. Use Value: Enables sub-µV baseline stability in precision front-ends without introducing measurement error or drift. |
Use Scenario: Protecting stepper motor enable, direction, and step signals in compact printer mainboards. IC Role / Device Role / Timing Role: Space-efficient dual-line protection replacing discrete diodes to reduce component count. Use Value: Eliminates need for two separate SOT-23 packages, saving >1.5 mm² board area per protected signal pair. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF7.0A (onsemi) | Single-channel, 7.0 V nominal Zener, same SOT-23 package but no dual-cathode configuration | Requires two devices for dual-line protection; higher BOM cost and board area | Select when only one line needs protection or when tighter 6.4–7.6 V Zener tolerance is required |
| TPD2E001DRYR (TI) | Two-channel ESD array with 10 pF capacitance, 12 kV HBM, 15 kV air, but no Zener clamping - uses silicon avalanche diodes | Lower capacitance suits USB 3.0/PCIe; lacks precise voltage clamping for overvoltage regulation | Select for ultra-high-speed interfaces where capacitance is critical, but verify system-level overvoltage margin |
Compared with SMF7.0A and TPD2E001DRYR, MA3075WALT1G uniquely delivers dual-line Zener clamping in one SOT-23 with 7.5 V nominal breakdown and 80 pF loading-making it optimal for cost-sensitive, space-constrained 5 V interface protection where regulated clamping voltage matters more than ultra-low capacitance.
Availability
MA3075WALT1G is available at Aetrix Electronics and suitable for USB 2.0 data line protection, RS-232/RS-485 transceiver safeguarding, and medical sensor interface shielding requiring stable component supply and long-term manufacturability.
Supply support for MA3075WALT1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MA3075WALT1G belongs to onsemi's Zener ESD Protection Diode product line, engineered specifically for compact, high-reliability transient suppression in signal integrity-critical interfaces where dual-line protection and precise voltage clamping are essential.
FAQ
What is the primary function of the MA3075WALT1G?
The MA3075WALT1G is a dual common-anode Zener diode designed for ESD and transient overvoltage protection of two independent signal lines. It clamps voltages above 7.2–7.9 V to ground using two cathodes (Pins 1 and 2) and a shared anode (Pin 3), making it ideal for space-constrained interfaces like USB, RS-232, and sensor buses. Its 80 pF capacitance and 30 kV IEC 61000-4-2 rating ensure robust protection without degrading signal integrity.
Is the MA3075WALT1G suitable for automotive applications?
The MA3075WALT1G itself is not AEC-Q101 qualified; however, its automotive-grade variant SZMA3075WALT1G is explicitly rated for automotive use, meeting AEC-Q101 stress testing and PPAP requirements. Engineers selecting MA3075WALT1G for non-automotive designs should verify that the SZ prefix version is used where automotive qualification is mandatory. Both share identical electrical specs and SOT-23 pinout.
What does the "WAL" in MA3075WALT1G signify?
The "WAL" in MA3075WALT1G is onsemi's internal device code denoting the specific Zener voltage grade (7.5 V nominal), package type (SOT-23), and construction (dual common-anode monolithic die). It distinguishes this part from other members of the MA307x family, such as MA3070WALT1G (5.6 V) or MA3085WALT1G (12 V), ensuring correct voltage clamping for 5 V system interfaces.
Can the MA3075WALT1G replace a single Zener diode in a design?
No-the MA3075WALT1G is not a drop-in replacement for a single Zener diode due to its dual-cathode common-anode architecture. Using only one cathode (e.g., Pin 1) while leaving Pin 2 unconnected may cause unpredictable leakage or thermal imbalance. For single-line protection, onsemi recommends dedicated single-channel parts like SMF7.0A. The MA3075WALT1G must be used with both cathodes actively engaged in dual-line protection.
What is the maximum operating temperature for the MA3075WALT1G?
The MA3075WALT1G supports an operating junction and storage temperature range of −55 °C to +150 °C. Its thermal resistance (Junction-to-Ambient) is 556 °C/W when mounted on a standard FR-5 board (1.0 × 0.75 × 0.062 in), and power derating begins above 25 °C at 1.8 mW/°C. This allows reliable operation in industrial environments and under moderate power dissipation conditions.
MA3075WALT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.2V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 15W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 80pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MA3075WALT1G FAQ
1.How can I place an order for MA3075WALT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MA3075WALT1G 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 MA3075WALT1G reliable?
The price and inventory of MA3075WALT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MA3075WALT1G is usually 5 days.
3.What payment methods are accepted for MA3075WALT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MA3075WALT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MA3075WALT1G?
MA3075WALT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MA3075WALT1G 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 MA3075WALT1G?
For technical support, including MA3075WALT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MA3075WALT1G requirements.
6.How does Aetrix verify that MA3075WALT1G is sourced from the original manufacturer or authorized distributors?
All MA3075WALT1G 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 MA3075WALT1G meets industry standards.
7.What is the process for return or replacement of MA3075WALT1G?
All MA3075WALT1G units undergo pre-shipment inspection (PSI). If there is an issue with MA3075WALT1G, 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 MA3075WALT1G part is unused and in its original packaging.
Return procedure for MA3075WALT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MA3075WALT1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
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DESD5V0U1BA-7
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ESD5Z5.0T1G
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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