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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Microchip Technology SMDA03C-7/TR13

Name: SMDA03C-7/TR13
Brand: Microchip Technology
SKU: SMDA03C-7/TR13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMDA03C-7/TR13

Manufacturer:: Microchip Technology

Category:: TVS Diodes

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: SMDA03C-7/TR13.pdf

Description:: TVS DIODE 3.3VWM 9VC 8-SO

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Product details

Overview

SMDA03C-7/TR13 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), 3.3 V stand-off voltage (V_WM), and clamping ≤7 V at 1 A. It protects up to 7 I/O lines in ESD-sensitive digital interfaces including TTL, CMOS, and microprocessor I/O transceivers.

For engineers reviewing the SMDA03C-7/TR13 datasheet, SMDA03C-7/TR13 pinout, SMDA03C-7/TR13 application, or SMDA03C-7/TR13 equivalent, key selection criteria include IEC 61000-4-2 ESD immunity (±15 kV air/±8 kV contact), low clamping voltage under surge current, and SO-8 board-level integration with minimal parasitic capacitance (300 pF @ 0 V).

Technical Context

This TVS array uses silicon avalanche diode technology to provide fast-response (sub-nanosecond) clamping during ESD and EFT events. Each of its seven channels operates bidirectionally with symmetrical breakdown (V_BR min = 4.0 V, max = ? V) and defined temperature coefficient (–5 mV/°C).

The device meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and secondary lightning surge standards. Its SO-8 footprint enables compact routing for multi-line protection without discrete placement overhead.

Key Specifications

Parameter	Value and Actual Design Meaning
Peak Pulse Power	300 W (8/20 µs waveform) - sustains high-energy transients without failure
Stand-off Voltage (V_WM)	3.3 V - matches nominal 3.3 V logic supply rails without leakage or false triggering
Clamping Voltage (V_C)	≤7 V @ 1 A - limits downstream IC stress below safe operating thresholds for 3.3 V I/O
Capacitance @ 0 V	300 pF - low enough for USB 2.0 and parallel bus signal integrity (not suitable for >100 MHz)
Operating Temp Range	–55 °C to +150 °C - supports industrial and automotive under-hood environments
IEC Standards	Compliant with IEC 61000-4-2 (±15 kV air, ±8 kV contact) and IEC 61000-4-4 (40 A, 5/50 ns)

Pinout & Package

SO-8 surface-mount package (JEDEC MS-012AC), 5.0 mm × 4.0 mm × 1.75 mm, pin #1 marked by dot on top surface. Tape-and-reel packaging per EIA-481-1-A (2500 pcs/reel).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode of Channel 1	Bidirectional protection node for Line 1 - connects to protected I/O trace
2	Cathode of Channel 1	Common cathode tie point - routed to ground plane with low-inductance path
3	Anode of Channel 2	Bidirectional protection node for Line 2 - isolated from other channels
4	Cathode of Channel 2	Shared cathode - same ground reference as Pin 2
5	Anode of Channel 3	Bidirectional protection node for Line 3 - maintains channel independence
6	Cathode of Channel 3	Shared cathode - electrically tied to Pins 2 and 4
7	Anode of Channel 4	Bidirectional protection node for Line 4 - supports four-channel grouping
8	Cathode of Channels 4–7	Common cathode for remaining channels - all seven cathodes internally bonded to Pin 8

Key Features

Feature	Design Value
7-line bidirectional protection	Single SO-8 device replaces seven discrete TVS diodes - reduces BOM count and PCB area
Low clamping voltage	V_C ≤7 V @ 1 A ensures 3.3 V logic I/O remains within absolute maximum ratings during ESD event
IEC 61000-4-2 certified	Validated for ±15 kV air discharge and ±8 kV contact discharge - meets end-equipment ESD compliance requirements
Negative tempco of V_BR	–5 mV/°C improves thermal stability - breakdown voltage decreases slightly with rising temperature, preventing thermal runaway

Applications

USB 2.0 Interface Protection	Industrial PLC I/O Modules
Use Scenario: Protecting D+ and D– lines of embedded USB 2.0 host/device ports against ESD during hot-plug and field handling. IC Role / Device Role / Timing Role: Board-level transient suppressor placed directly at connector entry point, clamping surges before reaching USB transceiver IC. Use Value: 300 pF capacitance avoids signal integrity degradation at 480 Mbps; 7 V clamping prevents damage to PHY layer circuitry.	Use Scenario: Shielding digital input/output terminals of programmable logic controllers exposed to factory floor EFT and cable-induced surges. IC Role / Device Role / Timing Role: Front-end protection element on terminal blocks and optocoupler interface circuits. Use Value: –55 °C to +150 °C rating supports operation in uncontrolled ambient enclosures; 300 W surge capacity handles repetitive EFT bursts.
Embedded Microcontroller GPIO Banks	Automotive Infotainment I/O
Use Scenario: Safeguarding multiple GPIO pins (e.g., UART, SPI, I²C) on ARM Cortex-M based edge nodes deployed in harsh environments. IC Role / Device Role / Timing Role: Parallel-connected TVS array across grouped I/O lines sharing common ground return. Use Value: Single SO-8 footprint protects up to 7 lines - eliminates layout complexity vs. discrete solutions while maintaining <1 ns response time.	Use Scenario: Protecting auxiliary control lines (e.g., display backlight enable, touch controller interrupt) in infotainment head units subject to ISO 10605 ESD testing. IC Role / Device Role / Timing Role: Secondary-level ESD clamp after primary filtering, positioned adjacent to connector. Use Value: 3.3 V V_WM aligns with LVCMOS I/O voltage domains; SO-8 allows automated placement and reflow compatibility.

USB 2.0 Interface Protection

Industrial PLC I/O Modules

Use Scenario: Protecting D+ and D– lines of embedded USB 2.0 host/device ports against ESD during hot-plug and field handling.

IC Role / Device Role / Timing Role: Board-level transient suppressor placed directly at connector entry point, clamping surges before reaching USB transceiver IC.

Use Value: 300 pF capacitance avoids signal integrity degradation at 480 Mbps; 7 V clamping prevents damage to PHY layer circuitry.

Use Scenario: Shielding digital input/output terminals of programmable logic controllers exposed to factory floor EFT and cable-induced surges.

IC Role / Device Role / Timing Role: Front-end protection element on terminal blocks and optocoupler interface circuits.

Use Value: –55 °C to +150 °C rating supports operation in uncontrolled ambient enclosures; 300 W surge capacity handles repetitive EFT bursts.

Embedded Microcontroller GPIO Banks

Automotive Infotainment I/O

Use Scenario: Safeguarding multiple GPIO pins (e.g., UART, SPI, I²C) on ARM Cortex-M based edge nodes deployed in harsh environments.

IC Role / Device Role / Timing Role: Parallel-connected TVS array across grouped I/O lines sharing common ground return.

Use Value: Single SO-8 footprint protects up to 7 lines - eliminates layout complexity vs. discrete solutions while maintaining <1 ns response time.

Use Scenario: Protecting auxiliary control lines (e.g., display backlight enable, touch controller interrupt) in infotainment head units subject to ISO 10605 ESD testing.

IC Role / Device Role / Timing Role: Secondary-level ESD clamp after primary filtering, positioned adjacent to connector.

Use Value: 3.3 V V_WM aligns with LVCMOS I/O voltage domains; SO-8 allows automated placement and reflow compatibility.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMDA03C-7	No /TR13 suffix - same electrical specs, standard tape-and-reel (2500 pcs) vs. TR13 (2500 pcs, EIA-481-1-A compliant)	Identical protection function; TR13 denotes specific reel packaging standard required by some OEMs	Select SMDA03C-7/TR13 when EIA-481-1-A tape compliance is mandated for SMT line feeders
SP1003-03HTG	Lower capacitance (15 pF), higher V_C (12 V @ 1 A), same V_WM - optimized for high-speed data lines	Better suited for HDMI or MIPI where low C_J is critical; less effective for general-purpose I/O due to higher clamping	Choose SP1003-03HTG only when signal bandwidth >100 MHz and clamping margin permits 12 V excursion

Compared with SMDA03C-7/TR13, the base SMDA03C-7 offers identical protection performance but lacks explicit TR13 tape specification; SP1003-03HTG trades lower capacitance for higher clamping voltage, making it unsuitable for 3.3 V logic rail protection unless system-level margins allow.

Availability

SMDA03C-7/TR13 is available at Aetrix Electronics and suitable for industrial automation interfaces, embedded USB peripherals, and automotive infotainment I/O requiring stable component supply across extended production lifecycles.

Supply support for SMDA03C-7/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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, ISO 9001 certified, with design centers in Asia, Europe, and the US.

The SMDAxxC-7 series targets board-level ESD/EFT protection for multi-line digital interfaces, emphasizing compact SO-8 integration, IEC-compliant robustness, and compatibility with 3.3 V and 5 V logic families.

FAQ

What is the clamping voltage of SMDA03C-7/TR13 at 5 A?

The clamping voltage of SMDA03C-7/TR13 is ≤9 V at 5 A (8/20 µs pulse), per the MSC0888.PDF datasheet Figure 2. This value ensures sustained protection during higher-current EFT events while keeping downstream 3.3 V logic within safe operating limits. The SMDA03C-7/TR13 maintains consistent clamping behavior across its full operating temperature range.

Does SMDA03C-7/TR13 support bidirectional signal lines like RS-485 or CAN?

SMDA03C-7/TR13 provides bidirectional transient suppression per channel and is suitable for protecting balanced differential lines such as RS-485, provided each line (A/B) is assigned to separate channels and shares the common cathode ground. It is not designed for CAN bus physical layer protection due to its 300 pF capacitance, which exceeds typical CAN timing requirements. The SMDA03C-7/TR13 is optimized for single-ended 3.3 V I/O, not differential bus protocols.

What is the leakage current specification for SMDA03C-7/TR13 at its stand-off voltage?

The maximum leakage current (I_D) for SMDA03C-7/TR13 is 200 µA at V_WM = 3.3 V and T_A = 25 °C, as specified in the Electrical Characteristics table of MSC0888.PDF. This low leakage ensures minimal impact on signal integrity and power budget in battery-powered or high-impedance circuits. The SMDA03C-7/TR13 maintains this spec across its full –55 °C to +150 °C operating range.

Can SMDA03C-7/TR13 be used for 5 V logic protection?

No - SMDA03C-7/TR13 has a 3.3 V stand-off voltage (V_WM) and is specifically designed for 3.3 V systems. Using it on 5 V lines risks premature conduction and excessive leakage. For 5 V logic, select SMDA05C-7/TR13 (V_WM = 5.0 V). The SMDA03C-7/TR13 must only be applied where continuous operating voltage does not exceed 3.3 V.

What is the meaning of the "TR13" suffix in SMDA03C-7/TR13?

The "TR13" suffix in SMDA03C-7/TR13 indicates compliance with EIA-481-1-A tape-and-reel packaging standards, including carrier tape dimensions, sprocket hole pitch, and component orientation. It specifies a 13-inch reel containing 2500 units - identical quantity to standard TR packaging but with tighter mechanical tolerances required by certain SMT assembly lines. The SMDA03C-7/TR13 electrical and thermal performance is identical to SMDA03C-7.

SMDA03C-7/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):: 3.3V

Voltage - Breakdown (Min):: 4V

Voltage - Clamping (Max) @ Ipp:: 9V

Current - Peak Pulse (10/1000µs):: 5A (8/20µs)

Power - Peak Pulse:: 300W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: 300pF @ 1MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

SMDA03C-7/TR13 FAQ

1.How can I place an order for SMDA03C-7/TR13 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMDA03C-7/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 SMDA03C-7/TR13 reliable?

The price and inventory of SMDA03C-7/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA03C-7/TR13 is usually 5 days.

3.What payment methods are accepted for SMDA03C-7/TR13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA03C-7/TR13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMDA03C-7/TR13?

SMDA03C-7/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMDA03C-7/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 SMDA03C-7/TR13?

For technical support, including SMDA03C-7/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA03C-7/TR13 requirements.

6.How does Aetrix verify that SMDA03C-7/TR13 is sourced from the original manufacturer or authorized distributors?

All SMDA03C-7/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 SMDA03C-7/TR13 meets industry standards.

7.What is the process for return or replacement of SMDA03C-7/TR13?

All SMDA03C-7/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA03C-7/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 SMDA03C-7/TR13 part is unused and in its original packaging.

Return procedure for SMDA03C-7/TR13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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