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Microchip Technology SMDA12C-7E3/TR13
- Part No.:
- SMDA12C-7E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA12C-7E3/TR13.pdf
- Description:
- TVS DIODE 12VWM 24VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,406
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Product details
Overview
SMDA12C-7E3/TR13 from Microsemi (now Microchip Technology) is a bidirectional transient voltage suppressor (TVS) array in SO-8 package, designed for board-level ESD and surge protection of up to 7 I/O lines. It features 12 V standoff voltage (VWM), 13.3 V minimum breakdown voltage (VBR), and clamps to ≤19 V at 1 A, with 300 W peak pulse power (8/20 µs), suitable for protecting CMOS, TTL, and microprocessor I/O transceivers.
For engineers reviewing the SMDA12C-7E3/TR13 datasheet, SMDA12C-7E3/TR13 pinout, SMDA12C-7E3/TR13 application, or SMDA12C-7E3/TR13 equivalent, key selection criteria include standoff voltage matching system operating voltage, clamping performance under 1–5 A transient current, SO-8 footprint compatibility, IEC 61000-4-2/4-4 compliance, and low leakage (<1 µA at VWM) for signal integrity.
Technical Context
This TVS array implements a monolithic silicon avalanche diode structure per channel, configured as seven independent bidirectional clamping cells in a single SO-8 package. Each channel provides symmetrical clamping above ±13.3 V breakdown and limits transient energy to ≤19 V at 1 A and ≤24 V at 5 A.
It operates across –55 °C to +150 °C, supports <0.01% pulse repetition rate, and meets IEC 61000-4-2 (±8 kV contact / ±15 kV air) and IEC 61000-4-4 (4 kV EFT) immunity requirements without external biasing or control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 12 V - Maximum continuous DC or RMS operating voltage the protected line may sustain without triggering conduction. |
| Breakdown Voltage (VBR) | 13.3 V min @ 1 mA - Voltage at which each diode begins avalanche conduction; ensures reliable turn-on before damage threshold of downstream ICs. |
| Clamping Voltage (VC) | ≤19 V @ 1 A - Peak voltage seen by protected circuit during 8/20 µs surge; keeps sensitive I/O below 20 V absolute maximum rating. |
| Peak Pulse Power | 300 W @ 8/20 µs - Energy-handling capability sufficient for Level 4 IEC 61000-4-2 ESD and 4 kV EFT events. |
| Leakage Current (ID) | ≤1 µA @ VWM - Negligible DC loading on high-impedance data lines, preserving signal integrity and logic thresholds. |
| Capacitance @ 0 V | 75 pF - Low enough to avoid signal degradation on moderate-speed digital interfaces (e.g., RS-232, USB 1.1, CAN). |
| Operating Temp Range | –55 °C to +150 °C - Enables use in automotive under-hood, industrial control, and extended-temperature embedded systems. |
Pinout & Package
SO-8 surface-mount package (JEDEC MS-012AC), 4.9 mm × 6.0 mm body, 1.75 mm max height, 1.27 mm pitch, pin #1 marked by dot on top surface. Weight ≈ 0.066 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Channel 1 | One terminal of first bidirectional TVS cell; connects to Line 1 of protected interface. |
| 2 | Cathode of Channel 1 | Second terminal of first bidirectional TVS cell; tied to common reference (e.g., GND or VCC plane). |
| 3 | Anode of Channel 2 | One terminal of second bidirectional TVS cell; connects to Line 2 of protected interface. |
| 4 | Cathode of Channel 2 | Second terminal of second bidirectional TVS cell; shares common reference node with Pin 2. |
| 5 | Anode of Channel 3 | One terminal of third bidirectional TVS cell; connects to Line 3 of protected interface. |
| 6 | Cathode of Channel 3 | Second terminal of third bidirectional TVS cell; shares same reference node as Pins 2 and 4. |
| 7 | Anode of Channel 4 | One terminal of fourth bidirectional TVS cell; connects to Line 4 of protected interface. |
| 8 | Cathode of Channel 4 | Second terminal of fourth bidirectional TVS cell; completes shared reference path for Channels 1–4 (Pins 2,4,6,8 all common). |
Key Features
| Feature | Design Value |
|---|---|
| 7-channel bidirectional protection | Enables simultaneous safeguarding of 7 independent data or control lines (e.g., UART, SPI, GPIO banks) using one SO-8 device. |
| IEC 61000-4-2 & -4-4 compliant | Validated for ±8 kV contact / ±15 kV air ESD and 4 kV electrical fast transients-meets industrial and automotive EMC requirements. |
| Low clamping voltage (≤19 V @ 1 A) | Ensures protected ICs remain within safe operating area during surge events, preventing latch-up or oxide breakdown in 3.3 V/5 V logic. |
| 75 pF capacitance @ 0 V | Minimizes signal rise-time distortion and crosstalk on interfaces up to ~10 Mbps, supporting legacy serial and parallel buses. |
| –55 °C to +150 °C operation | Supports deployment in harsh environments including engine control units, motor drives, and outdoor telecom equipment. |
Applications
| Industrial HMI Panels | Automotive Body Control Modules |
|---|---|
Use Scenario: Touchscreen controller and button interface lines exposed to operator ESD in factory-floor HMIs. IC Role / Device Role / Timing Role: Board-level transient suppressor placed directly at connector entry points to shunt ESD energy before reaching MCU GPIOs. Use Value: Prevents firmware lockup and touch misregistration caused by ±8 kV contact discharge, leveraging 12 V VWM alignment with 3.3 V/5 V supply rails. | Use Scenario: LIN bus and sensor input lines in door module ECUs subject to load dump and cable discharge events. IC Role / Device Role / Timing Role: Passive clamping element on bidirectional analog/digital signal paths; no timing or control function required. Use Value: Maintains signal fidelity under 4 kV EFT pulses while adding <75 pF parasitic capacitance-no impact on LIN 19.2 kbps timing budget. |
| Medical Diagnostic Port Interfaces | POS Terminal Serial Peripherals |
Use Scenario: RS-232 and USB 1.1 ports on ultrasound or patient monitor front panels exposed to clinical ESD. IC Role / Device Role / Timing Role: Standalone TVS array providing symmetric clamping on TX/RX/DTR/DSR lines without affecting DC bias or slew rate. Use Value: Achieves IEC 61000-4-2 Level 4 compliance with ≤19 V clamping, ensuring connected PC peripherals remain operational after repeated discharges. | Use Scenario: Barcode scanner and magnetic stripe reader interfaces in retail POS terminals handling frequent human contact. IC Role / Device Role / Timing Role: Primary ESD protection layer between external connectors and host microcontroller I/O pins. Use Value: 1 µA leakage at 12 V VWM avoids false triggering on open-drain or weak-pullup lines, preserving communication reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMDA12C-7 | No "E3/TR13" suffix; standard tape-and-reel packaging (2500 pcs/reel), same electrical specs and SO-8 footprint. | Identical protection function; differs only in packaging format and reel size-no design change required. | Select SMDA12C-7 for standard volume procurement where TR13 reel configuration is not mandated. |
| SM712-TR | Designed for RS-485/RS-422; 12 V VWM, but asymmetric clamping (13.3 V / 26 V), higher capacitance (110 pF), different pinout (SOT-23-6). | Optimized for differential bus protection-not suitable for 7-line parallel I/O; requires PCB redesign. | Choose SM712-TR only when protecting isolated differential pairs, not multi-line single-ended interfaces. |
Compared with SMDA12C-7E3/TR13, the base SMDA12C-7 offers identical protection performance in standard packaging, while SM712-TR serves a different interface topology with incompatible pinout and higher capacitance-making SMDA12C-7E3/TR13 the optimal choice for compact, multi-line board-level ESD hardening.
Availability
SMDA12C-7E3/TR13 is available at Aetrix Electronics and suitable for industrial HMI, automotive body electronics, medical diagnostic ports, and POS peripheral interfaces requiring stable component supply and guaranteed long-term availability.
Supply support for SMDA12C-7E3/TR13 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
Microsemi Corporation (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMDAxxC-7 series was developed specifically for board-level transient suppression in space-constrained, multi-line digital interfaces-emphasizing low capacitance, precise VWM tolerance, and robust IEC-compliant surge handling.
FAQ
What is the standoff voltage (VWM) of the SMDA12C-7E3/TR13?
The SMDA12C-7E3/TR13 has a standoff voltage (VWM) of 12 V, meaning it remains non-conductive up to this DC or RMS voltage level. This value matches typical 3.3 V and 5 V logic supply rails with safety margin, ensuring the device does not interfere with normal signal operation while providing reliable clamping during transients.
Does the SMDA12C-7E3/TR13 meet IEC 61000-4-2 ESD immunity standards?
Yes, the SMDA12C-7E3/TR13 is rated for IEC 61000-4-2 Level 4 ESD immunity (±8 kV contact, ±15 kV air). Its 300 W peak pulse power and ≤19 V clamping at 1 A ensure protected circuits remain functional after repeated discharges, making it suitable for end-equipment certification testing.
How many protected lines does the SMDA12C-7E3/TR13 support?
The SMDA12C-7E3/TR13 protects up to 7 bidirectional data or interface lines using its integrated 4-channel SO-8 configuration (with internal pairing enabling 7-line coverage). Each channel operates independently, allowing flexible routing for mixed-voltage I/O banks without shared impedance coupling.
What is the package type and pin count of the SMDA12C-7E3/TR13?
The SMDA12C-7E3/TR13 uses an SO-8 surface-mount package with 8 pins. Pin #1 is marked by a dot on the top surface. The package complies with JEDEC MS-012AC dimensions: 4.9 mm × 6.0 mm body, 1.27 mm lead pitch, and 1.75 mm max height-compatible with standard automated assembly processes.
What is the maximum clamping voltage of the SMDA12C-7E3/TR13 at 5 A?
The SMDA12C-7E3/TR13 has a maximum clamping voltage (VC) of 24 V at 5 A for an 8/20 µs surge waveform. This ensures downstream components with 25–30 V absolute maximum ratings (e.g., certain transceivers or level shifters) remain within safe operating limits during high-energy transients.
SMDA12C-7E3/TR13 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/TR13 FAQ
1.How can I place an order for SMDA12C-7E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA12C-7E3/TR13 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/TR13 reliable?
The price and inventory of SMDA12C-7E3/TR13 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/TR13 is usually 5 days.
3.What payment methods are accepted for SMDA12C-7E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA12C-7E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA12C-7E3/TR13?
SMDA12C-7E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA12C-7E3/TR13 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/TR13?
For technical support, including SMDA12C-7E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA12C-7E3/TR13 requirements.
6.How does Aetrix verify that SMDA12C-7E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMDA12C-7E3/TR13 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/TR13 meets industry standards.
7.What is the process for return or replacement of SMDA12C-7E3/TR13?
All SMDA12C-7E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA12C-7E3/TR13, 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/TR13 part is unused and in its original packaging.
Return procedure for SMDA12C-7E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA12C-7E3/TR13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
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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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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