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

Microchip Technology SMDA05-6/TR7

Name: SMDA05-6/TR7
Brand: Microchip Technology
SKU: SMDA05-6/TR7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMDA05-6/TR7

Manufacturer:: Microchip Technology

Category:: TVS Diodes

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

Datasheet:: SMDA05-6/TR7.pdf

Description:: TVS DIODE 5VWM 11VC 8-SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SMDA05-6/TR7 from Microsemi (now Microchip Technology) is a unidirectional transient voltage suppressor (TVS) array in SO-8 package, designed for board-level ESD and EFT protection of six I/O lines. It features 5.0 V standoff voltage (V_WM), 6.0 V minimum breakdown voltage (V_BR), and clamps to 9.8 V at 1 A, with 300 W peak pulse power (8/20 µs), suitable for safeguarding TTL, CMOS, and I/O transceivers in industrial control interfaces.

For engineers reviewing the SMDA05-6/TR7 datasheet, SMDA05-6/TR7 pinout, SMDA05-6/TR7 application, or SMDA05-6/TR7 equivalent, key selection criteria include standoff voltage matching system operating voltage, clamping performance under 1–5 A surge current, SO-8 footprint compatibility, IEC 61000-4-2/4-4 compliance, and low leakage (<20 µA at V_WM) for signal integrity in high-speed digital interfaces.

Technical Context

This TVS array implements six independent unidirectional avalanche diode structures in a single SO-8 package, each configured as a cathode-to-GND clamp. Its circuit topology ensures fast response (<1 ns) to ESD events while maintaining low capacitance (550 pF per line at 0 V, 1 MHz) to minimize signal distortion on data lines.

The device operates across –55 °C to +150 °C and supports ≤0.01% pulse repetition rate. Thermal design leverages the SO-8's copper leadframe for effective heat dissipation during 300 W transient surges, enabling robust protection without derating in typical industrial ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Standoff Voltage (V_WM)	5.0 V - Maximum continuous DC or RMS operating voltage the protected line may see without triggering conduction
Breakdown Voltage (V_BR)	6.0 V min @ 1 mA - Avalanche onset threshold ensuring reliable turn-on before downstream IC damage
Clamping Voltage (V_C)	9.8 V @ 1 A - Maximum voltage seen by protected circuit during 8/20 µs surge, limiting stress on I/O buffers
Peak Pulse Power	300 W @ 8/20 µs - Sustains high-energy transients such as lightning-induced surges or EFT bursts
Leakage Current (I_D)	20 µA max @ V_WM - Ensures minimal DC loading and signal integrity degradation on low-power logic lines
Capacitance (C)	550 pF @ 0 V, 1 MHz - Balanced trade-off between ESD robustness and bandwidth limitation on <10 Mbps interfaces
Operating Temperature	–55 °C to +150 °C - Enables deployment in under-hood automotive, motor drives, and industrial PLC environments

Pinout & Package

SO-8 surface-mount package with gull-wing leads, 1.27 mm pitch, 4.9 mm × 6.0 mm body size, and pin #1 identified by dot marking. Molded plastic body meets UL 94 V-0 flammability rating.

Pin/Terminal	Circuit Role	Design Meaning
1	I/O Line 1 Anode	Input node for first protected unidirectional data line; connects to system I/O trace
2	I/O Line 2 Anode	Input node for second protected unidirectional data line; isolated from other channels
3	I/O Line 3 Anode	Input node for third protected unidirectional data line; shares common cathode (pins 4 & 5)
4	GND	Common cathode return path for channels 1–3; must be low-inductance connection to system ground plane
5	GND	Common cathode return path for channels 4–6; electrically tied to pin 4 internally
6	I/O Line 4 Anode	Input node for fourth protected unidirectional data line; symmetric layout to pins 1–3
7	I/O Line 5 Anode	Input node for fifth protected unidirectional data line; maintains channel independence
8	I/O Line 6 Anode	Input node for sixth protected unidirectional data line; completes full 6-line protection set

Key Features

Feature	Design Value
6-channel unidirectional protection	Enables simultaneous safeguarding of RS-485, CAN, or parallel bus lines without bidirectional leakage paths
IEC 61000-4-2 Level 4 compliant	Withstands ±15 kV contact / ±20 kV air discharge ESD events without parametric shift or failure
Low clamping voltage (9.8 V @ 1 A)	Keeps protected CMOS/TTL I/O below absolute maximum ratings during transient events
550 pF line capacitance	Supports reliable operation on UART, SPI, and GPIO interfaces up to ~5 Mbps without signal edge degradation
SO-8 footprint compatibility	Allows drop-in replacement in existing layouts designed for standard SOIC-8 ESD arrays or discrete TVS placements

Applications

Industrial Serial Interface Protection	Automotive Body Control Module I/O
Use Scenario: RS-485 communication lines in factory automation PLCs exposed to cable coupling and relay switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS array clamping induced surges on differential pair inputs before they reach transceiver ICs. Use Value: Prevents latch-up or gate oxide damage in MAX485/SP3485 transceivers during 4 kV EFT bursts per IEC 61000-4-4.	Use Scenario: LIN bus and sensor input lines in door module ECUs subject to battery disconnect transients and ESD from human contact. IC Role / Device Role / Timing Role: Board-level transient suppressor placed at connector entry point to shunt energy away from MCU GPIO and LIN transceivers. Use Value: Maintains <1 µA leakage at 5 V supply to avoid false wake-up in sleep-mode microcontrollers while surviving ±8 kV contact ESD.
Medical Diagnostic Equipment Front Panel	Point-of-Sale Terminal Keypad Interface
Use Scenario: Membrane keypad and display control lines in portable ultrasound devices requiring Class B EMC compliance. IC Role / Device Role / Timing Role: Low-capacitance TVS array protecting ARM Cortex-M4 GPIOs driving capacitive touch overlay and LCD segments. Use Value: Limits clamping voltage to 9.8 V during 15 kV ESD strikes, preserving 3.3 V I/O tolerance and avoiding firmware lockup or display artifacts.	Use Scenario: Keypad scan matrix and USB data lines in retail terminals handling frequent operator ESD events in dry environments. IC Role / Device Role / Timing Role: Six-channel suppressor covering all row/column lines and VBUS/D+/D– traces at PCB edge connector. Use Value: Provides uniform 5.0 V standoff across all protected nodes, eliminating need for multiple discrete TVS devices and reducing BOM count by 83%.

Industrial Serial Interface Protection

Automotive Body Control Module I/O

Use Scenario: RS-485 communication lines in factory automation PLCs exposed to cable coupling and relay switching noise.

IC Role / Device Role / Timing Role: Unidirectional TVS array clamping induced surges on differential pair inputs before they reach transceiver ICs.

Use Value: Prevents latch-up or gate oxide damage in MAX485/SP3485 transceivers during 4 kV EFT bursts per IEC 61000-4-4.

Use Scenario: LIN bus and sensor input lines in door module ECUs subject to battery disconnect transients and ESD from human contact.

IC Role / Device Role / Timing Role: Board-level transient suppressor placed at connector entry point to shunt energy away from MCU GPIO and LIN transceivers.

Use Value: Maintains <1 µA leakage at 5 V supply to avoid false wake-up in sleep-mode microcontrollers while surviving ±8 kV contact ESD.

Medical Diagnostic Equipment Front Panel

Point-of-Sale Terminal Keypad Interface

Use Scenario: Membrane keypad and display control lines in portable ultrasound devices requiring Class B EMC compliance.

IC Role / Device Role / Timing Role: Low-capacitance TVS array protecting ARM Cortex-M4 GPIOs driving capacitive touch overlay and LCD segments.

Use Value: Limits clamping voltage to 9.8 V during 15 kV ESD strikes, preserving 3.3 V I/O tolerance and avoiding firmware lockup or display artifacts.

Use Scenario: Keypad scan matrix and USB data lines in retail terminals handling frequent operator ESD events in dry environments.

IC Role / Device Role / Timing Role: Six-channel suppressor covering all row/column lines and VBUS/D+/D– traces at PCB edge connector.

Use Value: Provides uniform 5.0 V standoff across all protected nodes, eliminating need for multiple discrete TVS devices and reducing BOM count by 83%.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ5.0A	Single-line DO-214AC package; 5.0 V V_WM, 9.2 V V_C @ 1 A; 400 W rating; higher capacitance (600 pF)	Requires six separate placements and routing; less space-efficient than integrated SO-8 solution	Preferred when board area allows discrete placement or when mixed-voltage protection (e.g., 3.3 V + 5 V lines) is needed
SP1006-05HTG	6-channel unidirectional SO-8; 5.0 V V_WM, 11.2 V V_C @ 1 A; 350 W rating; lower capacitance (30 pF)	Better suited for high-speed USB 2.0 or HDMI DDC lines due to ultra-low C; higher clamping voltage reduces margin for 5 V tolerant I/O	Chosen when signal bandwidth >100 MHz is required and system can tolerate 11.2 V transient overshoot

Compared with SMAJ5.0A and SP1006-05HTG, the SMDA05-6/TR7 delivers optimal balance of compact integration, moderate clamping (9.8 V), and proven reliability in industrial I/O protection-making it ideal for cost-sensitive, space-constrained designs where 5–10 Mbps interface speed and ±15 kV ESD immunity are primary requirements.

Availability

SMDA05-6/TR7 is available at Aetrix Electronics and suitable for industrial serial interfaces, automotive body electronics, medical diagnostic front panels, and point-of-sale terminal I/O requiring stable component supply, long-term lifecycle support, and consistent ESD performance across production batches.

Supply support for SMDA05-6/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

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 SMDAxx-6 TVS array series was developed to deliver standardized, multi-line board-level ESD protection for legacy and modern industrial control systems-emphasizing ruggedness, thermal stability, and compatibility with automated SMT assembly processes.

FAQ

What is the standoff voltage rating of the SMDA05-6/TR7, and how does it relate to circuit protection?

The SMDA05-6/TR7 has a standoff voltage (V_WM) of 5.0 V, meaning it remains non-conductive under normal 5 V DC operation. This rating ensures the device does not interfere with signal integrity while providing margin above typical 3.3 V or 5 V logic levels. When transient voltage exceeds the 6.0 V minimum breakdown threshold, the SMDA05-6/TR7 activates to clamp the line, protecting downstream components like microcontrollers or transceivers from overvoltage damage.

Does the SMDA05-6/TR7 meet international ESD and surge immunity standards?

Yes, the SMDA05-6/TR7 is explicitly rated for compliance with IEC 61000-4-2 (ESD) up to ±15 kV contact discharge and IEC 61000-4-4 (EFT) for electrical fast transients. Its 300 W peak pulse power rating (8/20 µs waveform) and low clamping voltage ensure robust protection against secondary lightning effects and board-level coupling events, making it suitable for CE-marked industrial equipment and automotive subsystems requiring formal EMC validation.

How many protected lines does the SMDA05-6/TR7 support, and what is its channel configuration?

The SMDA05-6/TR7 provides protection for six independent unidirectional data or interface lines. Its internal structure consists of six anode-connected TVS diodes sharing two common cathode pins (pins 4 and 5), forming three pairs per ground path. This configuration enables efficient board-level protection of parallel buses, multi-channel sensor interfaces, or dual-port communication links without cross-talk or shared impedance issues.

What is the typical capacitance of the SMDA05-6/TR7, and how does it affect high-speed signal lines?

The SMDA05-6/TR7 exhibits 550 pF capacitance per line at 0 V and 1 MHz. This value is optimized for interfaces operating up to ~5 Mbps-such as RS-232, RS-485, and slow SPI-where signal rise time degradation must be minimized. While not suitable for USB 2.0 or HDMI, this capacitance level avoids excessive loading on microcontroller GPIOs and maintains timing margins in industrial control applications without requiring additional series termination.

Is the SMDA05-6/TR7 compatible with automated SMT assembly processes?

Yes, the SMDA05-6/TR7 uses a standard SO-8 package with gull-wing leads and 1.27 mm pitch, fully compatible with industry-standard reflow profiles including J-STD-020. Its moisture sensitivity level (MSL) is rated per JEDEC standards, and the tape-and-reel packaging (2,500 pcs per 13-inch reel) supports high-volume pick-and-place operations. The device's thermal mass and leadframe design ensure reliable solder joint formation without tombstoning or voiding in typical Type 3 solder paste applications.

SMDA05-6/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:: 6

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 5V

Voltage - Breakdown (Min):: 6V

Voltage - Clamping (Max) @ Ipp:: 11V

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

Power - Peak Pulse:: 300W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: 550pF @ 1MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

SMDA05-6/TR7 FAQ

1.How can I place an order for SMDA05-6/TR7 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMDA05-6/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 SMDA05-6/TR7 reliable?

The price and inventory of SMDA05-6/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA05-6/TR7 is usually 5 days.

3.What payment methods are accepted for SMDA05-6/TR7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA05-6/TR7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMDA05-6/TR7?

SMDA05-6/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMDA05-6/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 SMDA05-6/TR7?

For technical support, including SMDA05-6/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA05-6/TR7 requirements.

6.How does Aetrix verify that SMDA05-6/TR7 is sourced from the original manufacturer or authorized distributors?

All SMDA05-6/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 SMDA05-6/TR7 meets industry standards.

7.What is the process for return or replacement of SMDA05-6/TR7?

All SMDA05-6/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA05-6/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 SMDA05-6/TR7 part is unused and in its original packaging.

Return procedure for SMDA05-6/TR7:

1.Submit a request within 90 days.

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

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