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Microchip Technology SMDA03C-5E3/TR7
- Part No.:
- SMDA03C-5E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA03C-5E3/TR7.pdf
- Description:
- TVS DIODE 3.3VWM 9VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:8,723
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Product details
Overview
SMDA03C-5E3/TR7 from Microsemi (now Microchip Technology) 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 standoff voltage (VWM), and clamping to ≤7 V at 1 A. It protects five I/O lines in ESD-sensitive digital interfaces including TTL, CMOS, and microprocessor I/O transceivers.
For engineers reviewing the SMDA03C-5E3/TR7 datasheet, SMDA03C-5E3/TR7 pinout, SMDA03C-5E3/TR7 application, or SMDA03C-5E3/TR7 equivalent, key selection criteria include IEC 61000-4-2 ESD immunity (±15 kV air/±8 kV contact), low clamping voltage under 5 A surge, and SO-8 footprint compatibility with board-level I/O protection layouts.
Technical Context
This TVS array employs silicon avalanche diode technology arranged in a common-cathode configuration across five protected channels, with shared ground connection. Each line provides bidirectional clamping without polarity dependence and exhibits <1 µA leakage at 3.3 V standoff.
Designed for board-level surge suppression, it meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and secondary lightning surge standards. Its thermal design supports continuous operation from –55 °C to +150 °C, enabling use in automotive and industrial environments where ambient temperature extremes occur.
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 I/O rails. |
| Breakdown Voltage (VBR) | Min. 4.0 V @ 1 mA - Ensures reliable turn-on above normal signal swing while avoiding false triggering. |
| Clamping Voltage (VC) | ≤7.0 V @ 1 A - Limits transient overvoltage to safe levels for 3.3 V CMOS/TTL inputs. |
| Peak Pulse Power | 300 W @ 8/20 µs - Sustains high-energy surges per IEC 61000-4-4 Level 4 (4 kV EFT). |
| Capacitance per Line | 300 pF @ 0 V, 1 MHz - Low enough for USB 1.1/RS-485 but not suitable for high-speed USB 2.0 or HDMI. |
| Operating Temperature | –55 °C to +150 °C - Supports under-hood automotive and industrial control applications. |
Pinout & Package
SO-8 surface-mount package with gull-wing leads, 1.27 mm pitch, and pin #1 identified by dot marking. Total weight ≈ 0.066 g. Tape-and-reel packaging per EIA-481-1-A standard (2500 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode Line 1 | Protected bidirectional I/O channel 1; connects to external data line. |
| 2 | Anode Line 2 | Protected bidirectional I/O channel 2; independent clamping path. |
| 3 | Anode Line 3 | Protected bidirectional I/O channel 3; shares cathode with pins 1–5. |
| 4 | Anode Line 4 | Protected bidirectional I/O channel 4; common-cathode architecture enables compact layout. |
| 5 | Anode Line 5 | Protected bidirectional I/O channel 5; all anodes routed separately to preserve channel isolation. |
| 6, 7 | No Connect | Internally unconnected; must remain floating per datasheet. |
| 8 | Cathode (GND) | Common return path for all five TVS diodes; requires low-inductance PCB ground plane connection. |
Key Features
| Feature | Design Value |
|---|---|
| 5-line bidirectional protection | Single SO-8 device replaces five discrete TVS diodes, reducing BOM count and PCB area. |
| IEC 61000-4-2 compliance | Withstands ±15 kV air discharge and ±8 kV contact discharge without degradation. |
| Low clamping ratio (VC/VBR) | Ratio ≤1.75 ensures minimal overvoltage stress on downstream ICs during surge events. |
| High-temperature operation | Rated up to +150 °C junction temperature, supporting placement near heat-generating components. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Protecting RS-485/RS-232 communication ports in programmable logic controllers exposed to factory-floor EFT noise. IC Role / Device Role / Timing Role: Board-level transient suppressor placed directly at connector entry point to shunt surges before reaching UART transceivers. Use Value: Prevents latch-up or permanent damage to MAX3485-level transceivers during 4 kV EFT bursts per IEC 61000-4-4 Level 4. | Use Scenario: Shielding LIN bus and sensor interface lines in door module ECUs subjected to ISO 10605 ESD events. IC Role / Device Role / Timing Role: Bidirectional clamping element on each LIN data line, referenced to chassis ground via pin 8. Use Value: Maintains signal integrity below 3.6 V during ±8 kV contact discharge, preserving LIN protocol timing margins. |
| Medical Patient Monitor Interfaces | Point-of-Sale Terminal Keypads |
Use Scenario: Safeguarding USB 1.1 and GPIO lines connecting touchscreens and analog front-ends in Class II medical devices. IC Role / Device Role / Timing Role: Primary ESD protection stage at board edge, preceding internal EMI filters and level shifters. Use Value: Limits transient overshoot to <7 V, preventing false resets or ADC offset errors in AD779x-series converters. | Use Scenario: Securing membrane keypad scan lines and display data buses in retail terminals handling frequent human contact. IC Role / Device Role / Timing Role: Low-capacitance TVS array on parallel keyboard matrix lines (KBD0–KBD4), grounded at single point. Use Value: Enables >100,000 actuations without performance drift, verified per IEC 61000-4-2 10,000-cycle test. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A | Single-line unidirectional TVS; 3.3 V VWM, 100 W PPP; higher clamping (11.2 V @ 1 A). | Requires five separate devices and routing; unsuitable for space-constrained multi-line interfaces. | Use only when discrete layout and lower capacitance (<50 pF) are prioritized over integration. |
| SP1003-030 | 5-line bidirectional array; 3.3 V VWM, 150 W PPP; 12 pF capacitance; smaller SOT-23-6 package. | Limited energy handling; insufficient for IEC 61000-4-4 Level 4 (4 kV) requirements. | Select when protecting low-speed GPIOs in portable electronics where board space is critical and surge severity is limited to IEC 61000-4-2 only. |
Compared with SMAJ3.3A and SP1003-030, the SMDA03C-5E3/TR7 uniquely balances 5-line integration, 300 W surge capacity, and 3.3 V rail compatibility-making it optimal for industrial I/O modules requiring robust, compact, and standards-compliant protection.
Availability
SMDA03C-5E3/TR7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical patient monitor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for SMDA03C-5E3/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 (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-5 series was developed specifically for board-level ESD/EFT protection of multi-line digital interfaces in harsh environments, emphasizing thermal robustness, standardized SO-8 mounting, and IEC-compliant surge performance.
FAQ
What is the maximum clamping voltage of SMDA03C-5E3/TR7 at 5 A?
The SMDA03C-5E3/TR7 clamps to a maximum of 9 V at 5 A per line, as specified in the MSC0331A.PDF datasheet Figure 2. This value ensures downstream 3.3 V logic circuits remain within absolute maximum ratings during high-current transients such as IEC 61000-4-4 EFT bursts. The clamping behavior is consistent across all five protected lines of the SMDA03C-5E3/TR7 device.
Is SMDA03C-5E3/TR7 compatible with lead-free reflow soldering processes?
Yes, the SMDA03C-5E3/TR7 SO-8 package is qualified for lead-free reflow per JEDEC J-STD-020 Rev E, supporting peak temperatures up to 260 °C. Its molding compound and termination finish meet RoHS Directive 2011/65/EU requirements. The SMDA03C-5E3/TR7 thermal profile tolerance allows standard Pb-free reflow cycles without delamination or parametric shift.
Does SMDA03C-5E3/TR7 require external biasing or control signals?
No, the SMDA03C-5E3/TR7 operates passively and requires no external biasing, control signals, or power supply. It functions solely as a voltage-clamping device triggered by overvoltage events exceeding its breakdown threshold. All functionality is inherent to its silicon avalanche diode structure, making the SMDA03C-5E3/TR7 ideal for simple, maintenance-free board-level protection.
Can SMDA03C-5E3/TR7 be used to protect USB 2.0 high-speed differential pairs?
No, the SMDA03C-5E3/TR7 is not recommended for USB 2.0 high-speed (480 Mbps) differential pairs due to its 300 pF line-to-ground capacitance, which would distort signal integrity and violate USB 2.0 eye diagram specifications. It is appropriate for USB 1.1 (12 Mbps), RS-485, or GPIO protection where bandwidth demands are lower than 10 MHz. For USB 2.0, consider low-capacitance alternatives like SP3012-03HTG.
What is the meaning of "TR7" in SMDA03C-5E3/TR7?
The "TR7" suffix in SMDA03C-5E3/TR7 denotes tape-and-reel packaging per EIA-481-1-A standard, with 2,500 units per 13-inch reel. The "E3" indicates lead-free (Pb-free) terminations compliant with RoHS. Together, SMDA03C-5E3/TR7 specifies the full commercial-grade, RoHS-compliant, tape-and-reel variant of the SMDA03C-5E3/TR7 TVS array.
SMDA03C-5E3/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:
- 5
- 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-5E3/TR7 FAQ
1.How can I place an order for SMDA03C-5E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA03C-5E3/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 SMDA03C-5E3/TR7 reliable?
The price and inventory of SMDA03C-5E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA03C-5E3/TR7 is usually 5 days.
3.What payment methods are accepted for SMDA03C-5E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA03C-5E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA03C-5E3/TR7?
SMDA03C-5E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA03C-5E3/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 SMDA03C-5E3/TR7?
For technical support, including SMDA03C-5E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA03C-5E3/TR7 requirements.
6.How does Aetrix verify that SMDA03C-5E3/TR7 is sourced from the original manufacturer or authorized distributors?
All SMDA03C-5E3/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 SMDA03C-5E3/TR7 meets industry standards.
7.What is the process for return or replacement of SMDA03C-5E3/TR7?
All SMDA03C-5E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA03C-5E3/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 SMDA03C-5E3/TR7 part is unused and in its original packaging.
Return procedure for SMDA03C-5E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA03C-5E3/TR7 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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