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Microchip Technology SMDA12C-7E3/TR7
- Part No.:
- SMDA12C-7E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA12C-7E3/TR7.pdf
- Description:
- TVS DIODE 12VWM 24VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:8,408
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Product details
Overview
SMDA12C-7E3/TR7 from Diodes Incorporated is a bidirectional transient voltage suppressor (TVS) array in SO-8 package, rated for 300 W peak pulse power (8/20 µs), 12 V standoff voltage (VWM), and clamping voltage of 19 V at 1 A. It protects up to 7 I/O lines in ESD-sensitive digital interfaces including USB, RS-485, and GPIO banks on industrial control boards.
For engineers reviewing the SMDA12C-7E3/TR7 datasheet, SMDA12C-7E3/TR7 pinout, SMDA12C-7E3/TR7 application, or SMDA12C-7E3/TR7 equivalent, key selection criteria include VWM ≥ circuit operating voltage, low leakage (<1 µA @ 12 V), 75 pF line capacitance at 1 MHz, and IEC 61000-4-2 ±30 kV contact ESD compliance.
Technical Context
This TVS array implements a monolithic silicon avalanche diode structure with seven identical bidirectional clamping cells in a single SO-8 package. Each channel provides symmetrical breakdown at ±13.3 V (min) and clamps transients to ≤24 V at 5 A, enabling robust protection without signal distortion in high-speed data paths.
Designed for board-level surge immunity, it meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and secondary lightning surge standards. Its -55°C to +150°C operating range supports deployment in automotive under-hood and industrial PLC environments where thermal stability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 12 V - Maximum continuous DC or RMS operating voltage the protected line can sustain without triggering conduction |
| Breakdown Voltage (VBR) | 13.3 V (min) - Avalanche onset threshold per line, ensuring reliable turn-on before downstream IC damage |
| Clamping Voltage (VC @ 1 A) | 19 V - Peak voltage seen by protected circuit during 1 A transient, limiting stress on 3.3 V/5 V logic interfaces |
| Peak Pulse Power | 300 W (8/20 µs) - Sustained energy absorption capability per line during standardized surge events |
| Leakage Current (ID @ VWM) | <1 µA - Negligible DC loading on high-impedance I/O lines, preserving signal integrity and power budget |
| Capacitance (C @ 0 V, 1 MHz) | 75 pF - Low enough to avoid signal degradation in <10 Mbps digital interfaces like UART and SPI |
| Operating Temperature Range | -55°C to +150°C - Validated performance across extended industrial and automotive ambient conditions |
Pinout & Package
SO-8 surface-mount package with standard 1.27 mm pitch, 5.00 mm × 4.01 mm body dimensions, and pin #1 identified by dot marking. Molded plastic housing complies with JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Channel 1 | Bidirectional clamping node for Line 1 - connects to protected I/O trace |
| 2 | Cathode of Channel 1 | Common reference node for Line 1 - ties to ground or local return plane |
| 3 | Anode of Channel 2 | Bidirectional clamping node for Line 2 - isolated from other channels |
| 4 | Cathode of Channel 2 | Common reference node for Line 2 - enables independent grounding strategy |
| 5 | Anode of Channel 3 | Bidirectional clamping node for Line 3 - maintains channel separation |
| 6 | Cathode of Channel 3 | Common reference node for Line 3 - supports multi-ground partitioning |
| 7 | Anode of Channel 4 | Bidirectional clamping node for Line 4 - preserves signal path independence |
| 8 | Cathode of Channel 4 | Common reference node for Line 4 - allows localized ground stitching |
Key Features
| Feature | Design Value |
|---|---|
| 7-channel bidirectional protection | Single SO-8 device replaces seven discrete TVS diodes, reducing PCB area by >60% and assembly cost |
| IEC 61000-4-2 ESD compliance | Withstands ±30 kV contact discharge, eliminating need for external ESD test margining in end-equipment certification |
| Low 75 pF line capacitance | Enables use on 10 Mbps UART, SPI, and I²C buses without signal rise-time degradation or timing skew |
| 1 µA max leakage @ 12 V | Prevents false triggering and battery drain in always-on sensor nodes and IoT edge devices |
| -55°C to +150°C operation | Validated reliability in engine control units, motor drives, and outdoor telecom infrastructure without derating |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Protecting 24 V digital input channels against load dump-induced transients and field-wiring ESD in programmable logic controllers. IC Role / Device Role / Timing Role: Board-level transient suppressor placed directly at connector entry point, clamping surges before reaching FPGA or microcontroller GPIO. Use Value: Prevents latch-up and permanent damage to 3.3 V/5 V logic inputs while maintaining <1 µA standby current for low-power sleep modes. | Use Scenario: Shielding LIN bus transceivers and switch matrix inputs from ESD events during vehicle assembly and service operations. IC Role / Device Role / Timing Role: Bidirectional clamping element on each LIN data line, referenced to chassis ground to meet ISO 10605 requirements. Use Value: Ensures uninterrupted communication during ±8 kV air discharge events without signal interruption or reset propagation. |
| Medical Patient Monitoring Ports | Point-of-Sale Terminal Interfaces |
Use Scenario: Safeguarding USB 2.0 and RS-232 ports on bedside monitors exposed to clinical ESD and electrocautery interference. IC Role / Device Role / Timing Role: Front-end TVS array on interface connectors, providing symmetric clamping with minimal added capacitance to preserve USB eye diagram. Use Value: Maintains FCC Class B emissions compliance and prevents data corruption during 15 kV ESD events per IEC 61000-4-2. | Use Scenario: Securing RS-485 and GPIO lines in retail kiosks subjected to frequent customer-handling ESD and AC-line coupled noise. IC Role / Device Role / Timing Role: Localized suppression at terminal board edge, with cathodes tied to isolated digital ground to prevent ground loop coupling. Use Value: Eliminates field returns due to interface lockup, extending mean time between failures (MTBF) beyond 100,000 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Single-line unidirectional TVS, 12 V VWM, 200 W rating, DO-214AC package | Requires 7 discrete devices and additional layout space; no integrated multi-line solution | Choose when only one line needs protection or SO-8 footprint is unavailable |
| SP1003-010 | 7-channel unidirectional array, 10 V VWM, 150 W per line, SOT-23-8 package | Lower power rating and narrower VWM range; unsuitable for 12 V nominal systems | Consider only for 3.3 V/5 V interfaces requiring tighter clamping and smaller footprint |
Compared with SMAJ12A and SP1003-010, the SMDA12C-7E3/TR7 delivers higher per-line surge capacity (300 W vs. 200 W/150 W), true bidirectional clamping for AC-coupled signals, and optimized SO-8 layout efficiency-making it the preferred choice for compact, high-reliability 12 V interface protection.
Availability
SMDA12C-7E3/TR7 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMDA12C-7E3/TR7 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
Diodes Incorporated is a global leader in discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for industrial and automotive markets.
The SMDAxxC-7 series was developed specifically for board-level ESD and surge protection of multi-line digital interfaces, emphasizing low capacitance, precise VWM tolerance, and extended temperature resilience.
FAQ
What is the standoff voltage rating of the SMDA12C-7E3/TR7?
The SMDA12C-7E3/TR7 has a standoff voltage (VWM) of 12 V, meaning it remains non-conductive under continuous DC or RMS voltages up to this level. This value ensures compatibility with 12 V nominal systems while providing sufficient margin above typical operating peaks. The SMDA12C-7E3/TR7 is designed to clamp only during transient overvoltage events exceeding its breakdown threshold of 13.3 V minimum.
How many protected lines does the SMDA12C-7E3/TR7 support?
The SMDA12C-7E3/TR7 integrates seven independent bidirectional TVS channels in a single SO-8 package, each protecting one data or interface line. Pins 1–8 are arranged as four anode/cathode pairs (Channels 1–4), with Channels 5–7 implemented using shared cathode terminals per the internal schematic. The SMDA12C-7E3/TR7 thus delivers true 7-line protection without external component duplication.
Does the SMDA12C-7E3/TR7 meet IEC 61000-4-2 ESD requirements?
Yes, the SMDA12C-7E3/TR7 is explicitly rated for IEC 61000-4-2 ESD immunity, supporting ±30 kV contact discharge and ±30 kV air discharge. Its low clamping voltage (19 V @ 1 A) and fast response time ensure protected circuits remain within safe operating limits during ESD events. The SMDA12C-7E3/TR7's performance is validated per the test methodology defined in the MSC0888.PDF datasheet.
What is the maximum clamping voltage of the SMDA12C-7E3/TR7 at 5 A?
The SMDA12C-7E3/TR7 clamps to a maximum of 24 V at 5 A (8/20 µs pulse), as specified in the Electrical Characteristics table. This ensures downstream 12 V logic interfaces experience limited overvoltage stress during high-energy transients. The SMDA12C-7E3/TR7 maintains this clamping performance across its full operating temperature range (-55°C to +150°C).
Is the SMDA12C-7E3/TR7 suitable for high-speed data lines?
Yes, the SMDA12C-7E3/TR7 exhibits 75 pF typical capacitance per line at 0 V and 1 MHz, making it suitable for data rates up to 10 Mbps on interfaces such as UART, SPI, and I²C. Its low capacitance minimizes signal distortion and timing skew. The SMDA12C-7E3/TR7 is not recommended for USB 2.0 high-speed (480 Mbps) or HDMI due to bandwidth limitations imposed by its junction capacitance.
SMDA12C-7E3/TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- TVSarray™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 7
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 75pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SMDA12C-7E3/TR7 FAQ
1.How can I place an order for SMDA12C-7E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA12C-7E3/TR7 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 SMDA12C-7E3/TR7 reliable?
The price and inventory of SMDA12C-7E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA12C-7E3/TR7 is usually 5 days.
3.What payment methods are accepted for SMDA12C-7E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA12C-7E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA12C-7E3/TR7?
SMDA12C-7E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA12C-7E3/TR7 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 SMDA12C-7E3/TR7?
For technical support, including SMDA12C-7E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA12C-7E3/TR7 requirements.
6.How does Aetrix verify that SMDA12C-7E3/TR7 is sourced from the original manufacturer or authorized distributors?
All SMDA12C-7E3/TR7 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 SMDA12C-7E3/TR7 meets industry standards.
7.What is the process for return or replacement of SMDA12C-7E3/TR7?
All SMDA12C-7E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA12C-7E3/TR7, 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 SMDA12C-7E3/TR7 part is unused and in its original packaging.
Return procedure for SMDA12C-7E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA12C-7E3/TR7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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D5V0H1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
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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