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Microchip Technology SMDA03-6E3/TR7
- Part No.:
- SMDA03-6E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA03-6E3/TR7.pdf
- Description:
- TVS DIODE 3.3VWM 9VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,549
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Product details
Overview
SMDA03-6E3/TR7 from Microsemi (now Microchip Technology) is a unidirectional transient voltage suppressor (TVS) array in SO-8 package, rated for 300 W peak pulse power (8/20 µs), 3.3 V standoff voltage (VWM), and clamping ≤7 V at 1 A. It protects six I/O lines in ESD-sensitive digital interfaces including TTL, CMOS, SRAM, and I/O transceivers.
For engineers reviewing the SMDA03-6E3/TR7 datasheet, SMDA03-6E3/TR7 pinout, SMDA03-6E3/TR7 application, or SMDA03-6E3/TR7 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 defined Pin #1 dot marking.
Technical Context
This TVS array employs silicon avalanche diode technology to provide fast-response clamping of transient overvoltages across six independent unidirectional channels. Each channel features a breakdown voltage (VBR) of 4.0 V min at 1 mA and clamps to ≤7 V at 1 A, enabling robust protection of low-voltage logic interfaces without signal distortion.
Designed for board-level surge suppression, it meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and secondary lightning surge standards. Its -55°C to +150°C operating temperature range supports industrial and automotive under-hood applications where thermal stability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 3.3 V - Maximum continuous operating voltage before conduction begins; matches 3.3 V logic supply rails. |
| Breakdown Voltage (VBR) | 4.0 V min @ 1 mA - Ensures reliable triggering above normal signal swing while avoiding false trips. |
| Clamping Voltage (VC) | ≤7 V @ 1 A - Limits transient voltage seen by protected ICs to safe levels during ESD/EFT events. |
| Peak Pulse Power | 300 W @ 8/20 µs - Sustains high-energy surges without degradation, per IEC test waveforms. |
| Leakage Current (ID) | ≤200 µA @ VWM - Minimizes standby power loss and avoids loading of high-impedance signal lines. |
| Capacitance (C) | 800 pF @ 0 V, 1 MHz - Low enough for USB 1.1/2.0 and RS-232 data rates; verified per device test condition. |
| Operating Temperature | -55°C to +150°C - Supports extended-range deployment in industrial control and automotive ECUs. |
Pinout & Package
SO-8 surface-mount package with molded plastic body, 0.150–0.158 inch width, 0.053–0.069 inch height, and Pin #1 identified by dot marking on top surface. Weight: 0.066 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | I/O Line 1 Anode | Unidirectional TVS anode input for first protected line; connects to trace routed to IC pin. |
| 2 | I/O Line 2 Anode | Second independent unidirectional channel anode; electrically isolated from other pins. |
| 3 | I/O Line 3 Anode | Third protected line input; shares common cathode (Pin 4) with all other I/O anodes. |
| 4 | Common Cathode (GND) | Shared cathode return path for all six TVS diodes; must connect directly to clean system ground plane. |
| 5 | I/O Line 4 Anode | Fourth independent anode; identical electrical behavior to Pins 1–3. |
| 6 | I/O Line 5 Anode | Fifth protected line input; no internal coupling between anodes ensures channel independence. |
| 7 | I/O Line 6 Anode | Sixth and final unidirectional channel; enables full 6-line protection in single SO-8 footprint. |
| 8 | Common Cathode (GND) | Second GND terminal for low-inductance grounding; used with Pin 4 to reduce ground loop impedance. |
Key Features
| Feature | Design Value |
|---|---|
| 6-channel unidirectional protection | Enables simultaneous safeguarding of six separate low-voltage data lines without cross-talk or shared failure modes. |
| IEC 61000-4-2 compliant | Validated for ±15 kV air discharge and ±8 kV contact discharge, meeting industrial ESD immunity requirements. |
| Low clamping at 1 A | 7 V max clamping ensures protected 3.3 V logic remains within safe absolute maximum ratings during transients. |
| SO-8 surface-mount packaging | Standardized footprint allows automated placement and reflow compatibility with existing PCB assembly processes. |
| Wide temperature operation | Guaranteed performance from -55°C to +150°C supports deployment in harsh environments without derating. |
Applications
| Industrial Serial Interfaces | USB 1.1/2.0 Data Lines |
|---|---|
Use Scenario: Protection of RS-485/RS-232 transceiver I/O pins in factory automation PLCs exposed to cable-induced surges and ESD. IC Role / Device Role / Timing Role: Board-level transient clamp placed between connector and transceiver IC, shunting surge energy to ground before reaching sensitive inputs. Use Value: Prevents latch-up or gate oxide damage in MAX3485/MAX3232 ICs during field maintenance or cable hot-plug events. | Use Scenario: ESD protection for D+ and D- lines in embedded USB host/device ports on medical diagnostic equipment. IC Role / Device Role / Timing Role: Unidirectional TVS array placed inline with differential data pairs, preserving signal integrity up to 480 Mbps. Use Value: Maintains USB eye diagram compliance while suppressing ±8 kV contact ESD per IEC 61000-4-2 without adding jitter or skew. |
| Automotive Body Control Modules | Memory Interface Protection |
Use Scenario: Surge protection for LIN bus or CAN FD auxiliary I/O lines in BCMs subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Front-end transient suppressor on microcontroller GPIO lines connected to external sensors or switches. Use Value: Withstands repetitive EFT bursts (IEC 61000-4-4) and prevents firmware crashes caused by transient-induced MCU resets. | Use Scenario: Clamping overvoltage on address/data bus lines connecting microcontroller to external SRAM or flash memory in avionics systems. IC Role / Device Role / Timing Role: Parallel-connected TVS diode array placed at memory socket to limit transient voltage on each signal line. Use Value: Eliminates bit errors and memory corruption during electrostatic discharge events near memory modules during maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMDA03-6 | No "E3/TR7" suffix; same electrical specs and SO-8 package; differs only in tape-and-reel packaging (TR7 = 7-inch reel, 2500 pcs). | Identical functional use; TR7 variant optimized for high-volume SMT production with standard EIA-481-1-A carrier tape. | Select SMDA03-6E3/TR7 when automated pick-and-place throughput and reel logistics require 7-inch tape format. |
| SMF3.3A | Single-channel 3.3 V TVS diode (SOD-123), 200 W rating, 12 V clamping @ 1 A - higher clamping than SMDA03-6E3/TR7's 7 V. | Requires six discrete devices and more PCB area; lacks integrated multi-line layout efficiency of SO-8 array. | Choose SMF3.3A only if design requires channel isolation beyond SO-8 internal structure or needs different footprint constraints. |
Compared with SMDA03-6E3/TR7, the base SMDA03-6 offers identical protection performance but in non-tray/reel form, while SMF3.3A delivers lower integration density and higher clamping voltage-making SMDA03-6E3/TR7 optimal for space-constrained, high-channel-count 3.3 V interface protection.
Availability
SMDA03-6E3/TR7 is available at Aetrix Electronics and suitable for industrial serial interfaces, USB data line protection, and automotive body control modules requiring stable component supply and long-term manufacturing continuity.
Supply support for SMDA03-6E3/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.
The SMDAxx-6 TVS array product line was designed specifically for board-level ESD and surge protection of multi-line digital interfaces in industrial, telecom, and automotive systems.
FAQ
What is the standoff voltage rating of the SMDA03-6E3/TR7?
The SMDA03-6E3/TR7 has a standoff voltage (VWM) of 3.3 V, meaning it remains non-conductive below this DC or continuous peak voltage. This matches standard 3.3 V logic supply rails and ensures no interference with normal signal operation while providing precise overvoltage triggering at 4.0 V minimum breakdown.
Does the SMDA03-6E3/TR7 meet IEC 61000-4-2 ESD requirements?
Yes, the SMDA03-6E3/TR7 is specified to meet IEC 61000-4-2 for electrostatic discharge immunity, supporting ±15 kV air discharge and ±8 kV contact discharge testing. Its low clamping voltage (≤7 V at 1 A) and fast response ensure protected circuits remain within safe operating limits during ESD events.
How many protected lines does the SMDA03-6E3/TR7 support?
The SMDA03-6E3/TR7 supports six independent unidirectional data or interface lines using a single SO-8 package. Pins 1–3 and 5–7 serve as individual anodes, while Pins 4 and 8 are tied to common cathode (ground), enabling compact board-level protection without discrete component proliferation.
What is the peak pulse power rating of the SMDA03-6E3/TR7?
The SMDA03-6E3/TR7 is rated for 300 W peak pulse power under the standardized 8/20 µs current waveform defined in IEC 61000-4-5. This rating applies per channel and is validated across the full operating temperature range (-55°C to +150°C), ensuring consistent surge handling in demanding environments.
Is the SMDA03-6E3/TR7 compatible with automated SMT assembly?
Yes, the SMDA03-6E3/TR7 is supplied in EIA-481-1-A compliant tape-and-reel format (7-inch reel, 2500 pieces), fully compatible with standard pick-and-place equipment. Its SO-8 footprint, defined Pin #1 dot marking, and 0.050-inch lead pitch support high-yield, high-speed surface-mount assembly without manual intervention.
SMDA03-6E3/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):
- 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:
- 800pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SMDA03-6E3/TR7 FAQ
1.How can I place an order for SMDA03-6E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA03-6E3/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 SMDA03-6E3/TR7 reliable?
The price and inventory of SMDA03-6E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA03-6E3/TR7 is usually 5 days.
3.What payment methods are accepted for SMDA03-6E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA03-6E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA03-6E3/TR7?
SMDA03-6E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA03-6E3/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 SMDA03-6E3/TR7?
For technical support, including SMDA03-6E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA03-6E3/TR7 requirements.
6.How does Aetrix verify that SMDA03-6E3/TR7 is sourced from the original manufacturer or authorized distributors?
All SMDA03-6E3/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 SMDA03-6E3/TR7 meets industry standards.
7.What is the process for return or replacement of SMDA03-6E3/TR7?
All SMDA03-6E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA03-6E3/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 SMDA03-6E3/TR7 part is unused and in its original packaging.
Return procedure for SMDA03-6E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA03-6E3/TR7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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