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Microchip Technology SMDA05C-4E3/TR7
- Part No.:
- SMDA05C-4E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA05C-4E3/TR7.pdf
- Description:
- TVS DIODE 5VWM 11VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,569
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Product details
Overview
SMDA05C-4E3/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), 5.0 V stand-off voltage (VWM), and 9.8 V breakdown voltage (VBR @1 mA). It protects four I/O lines in ESD-sensitive digital interfaces such as RS-232, USB, and parallel bus transceivers.
For engineers reviewing the SMDA05C-4E3/TR7 datasheet, SMDA05C-4E3/TR7 pinout, SMDA05C-4E3/TR7 application, or SMDA05C-4E3/TR7 equivalent, key selection criteria include clamping voltage at 1 A (9.8 V), leakage current ≤400 µA at VWM, and IEC 61000-4-2/4-4 compliance for board-level ESD/EFT protection.
Technical Context
This TVS array integrates four identical bidirectional avalanche diode pairs in a single SO-8 package, enabling simultaneous protection of four data or control lines without polarity constraints. Each channel exhibits symmetrical clamping behavior with 9.8 V (min) breakdown and 11 V (max) clamping at 5 A.
Designed for board-level surge suppression, it operates across –55 °C to +150 °C and delivers stable performance under repeated low-duty-cycle transients (<0.01% repetition rate), making it suitable for industrial and automotive interface protection where thermal derating is minimal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 5.0 V - Maximum continuous operating voltage before conduction; must exceed circuit's peak signal voltage to avoid leakage-induced interference. |
| VBR (Breakdown Voltage) | 6.0 V min / 7.0 V max @1 mA - Threshold at which avalanche conduction begins; defines minimum trigger level for transient suppression. |
| VC @1 A (Clamping Voltage) | 9.8 V - Maximum voltage seen by protected line during 1 A transient; ensures TTL/CMOS logic remains within safe input limits. |
| VC @5 A (Clamping Voltage) | 11 V - Clamped voltage under higher-energy 5 A surge; critical for evaluating worst-case stress on downstream receivers. |
| IDRM (Leakage Current) | ≤400 µA @5.0 V - Low off-state current prevents signal integrity degradation or false triggering in high-impedance I/O paths. |
| CJ (Capacitance) | 200 pF @0 V, 1 MHz - Measured junction capacitance per line; impacts high-speed signal rise time and bandwidth in data lines up to ~10 Mbps. |
| Peak Pulse Power | 300 W (8/20 µs waveform) - Energy-handling capability for standardized lightning/surge events; determines survivability against IEC 61000-4-5 Level 3 surges. |
Pinout & Package
SO-8 surface-mount package (JEDEC MS-012AC), 4.9 mm × 6.0 mm footprint, 1.75 mm max height, with pin #1 identified by dot marking. Molded plastic body with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Anode/Cathode pair per channel | Each pair forms one bidirectional TVS path; pins 1–2, 3–4, 5–6, 7–8 protect four independent lines. |
| 5, 6, 7, 8 | Anode/Cathode pair per channel | Complementary terminals completing four symmetrical clamping paths; no ground or power reference required. |
| Pin #1 | Reference marker | Dot-marked corner; used for orientation during automated placement and visual inspection per IPC-A-610. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 4-line protection | Single SO-8 device replaces four discrete TVS diodes, reducing PCB area by >60% and eliminating routing asymmetry. |
| IEC 61000-4-2 Level 4 compliant | Withstands ±15 kV contact / ±20 kV air discharge without parametric shift-validated per full standard test procedure. |
| Low clamping ratio (VC/VBR) | 11 V / 6.0 V = 1.83 - Tighter than typical unidirectional arrays; minimizes overvoltage margin needed for logic-safe design. |
| High temperature operation | Rated from –55 °C to +150 °C - Enables use in under-hood automotive modules and industrial motor drives without derating. |
| SO-8 tape-and-reel packaging | EIA-481-1-A compliant, 2500 pcs/reel - Supports high-volume SMT assembly with standard pick-and-place feeders. |
Applications
| Industrial Serial Interfaces | USB 2.0 Data Lines |
|---|---|
Use Scenario: Protection of RS-485 transceivers in factory automation PLCs exposed to cable-induced EFT bursts. IC Role / Device Role / Timing Role: Board-level transient clamp placed directly at connector entry point, shunting surges before reaching PHY IC. Use Value: Limits induced voltage to ≤11 V during 5 A transients, preventing latch-up or gate oxide damage in MAX3485-class transceivers. | Use Scenario: ESD hardening of D+ and D− lines in embedded USB host controllers on medical diagnostic equipment. IC Role / Device Role / Timing Role: Bidirectional TVS array absorbing ±15 kV HBM discharges while maintaining <200 pF loading for full-speed (12 Mbps) signaling. Use Value: Prevents data corruption and port reset events during clinical staff handling, validated per IEC 61000-4-2 pre-compliance testing. |
| Automotive Body Control Modules | Parallel Bus I/O Protection |
Use Scenario: Protecting LIN bus transceivers and sensor inputs in door module ECUs subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Front-end surge limiter on all external-facing signal lines, operating continuously across –40 °C to +125 °C ambient. Use Value: Maintains 5.0 V stand-off margin above 12 V nominal supply, ensuring no DC conduction during battery transients up to 27 V. | Use Scenario: Safeguarding address/data bus lines between microcontroller and SRAM in avionics display units. IC Role / Device Role / Timing Role: Four-channel clamping device placed adjacent to memory socket, suppressing coupling from adjacent switching noise sources. Use Value: 200 pF capacitance per line avoids timing skew on 10 ns address strobes, preserving setup/hold margins in 100 MHz bus operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Unidirectional, single-line, DO-214AC package; 5.0 V VWM, 9.2 V VC@1 A, 400 W rating | Requires four separate devices and polarity-aware layout; lacks integrated multi-line symmetry | Preferred when space allows discrete placement and unidirectional protection suffices (e.g., power rail + signal). |
| SP1003-04UTG | Bidirectional, 4-line, SOT-23-6 package; 5.0 V VWM, 14.5 V VC@1 A, 150 W rating | Higher clamping voltage and lower power rating; smaller footprint but less robust for IEC 61000-4-5 surges | Used where board area is constrained and surge energy is limited to ESD-only (no EFT/lightning). |
Compared with SMAJ5.0A and SP1003-04UTG, the SMDA05C-4E3/TR7 provides balanced bidirectional clamping across four lines in one SO-8 footprint, with superior 300 W surge capacity and tighter 11 V clamping-making it optimal for compact, high-reliability interface protection where coordinated line behavior matters.
Availability
SMDA05C-4E3/TR7 is available at Aetrix Electronics and suitable for industrial serial interfaces, USB 2.0 data lines, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for SMDA05C-4E3/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 SMDAxxC-4 series was developed specifically for board-level ESD/EFT protection of multi-line digital interfaces, emphasizing low clamping voltage, thermal stability, and SO-8 manufacturability for high-volume SMT deployment.
FAQ
What is the maximum clamping voltage of SMDA05C-4E3/TR7 at 5 A?
The SMDA05C-4E3/TR7 has a maximum clamping voltage of 11 V at 5 A (8/20 µs pulse), as specified in the MSC0886.PDF datasheet. This value ensures protected circuits remain within safe voltage limits during high-energy transients. The SMDA05C-4E3/TR7 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C without derating.
Is SMDA05C-4E3/TR7 compatible with automated SMT assembly?
Yes, the SMDA05C-4E3/TR7 is supplied in EIA-481-1-A compliant tape-and-reel format (2500 pcs/reel) and features a standard SO-8 footprint with gull-wing leads. Its 0.050" pitch and defined pin #1 dot enable reliable vision-based alignment and placement using Class III pick-and-place systems. The SMDA05C-4E3/TR7 has been qualified for reflow per J-STD-020 moisture sensitivity level 1.
Does SMDA05C-4E3/TR7 meet IEC 61000-4-2 and IEC 61000-4-4 standards?
Yes, the SMDA05C-4E3/TR7 is explicitly rated for surge protection per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), as confirmed in the MSC0886.PDF datasheet. It withstands ±15 kV contact discharge and delivers consistent clamping under 4 kV EFT bursts. The SMDA05C-4E3/TR7 achieves this through symmetric bidirectional diode structure and optimized junction capacitance.
What is the junction capacitance of SMDA05C-4E3/TR7 per line?
The SMDA05C-4E3/TR7 exhibits 200 pF typical junction capacitance per channel at 0 V and 1 MHz, as measured and published in the MSC0886.PDF electrical characteristics table. This value supports reliable operation on data lines up to 10 Mbps without significant signal distortion. The SMDA05C-4E3/TR7 maintains capacitance stability across bias voltage due to its planar diode construction.
Can SMDA05C-4E3/TR7 be used to protect 3.3 V logic interfaces?
No-SMDA05C-4E3/TR7 is not recommended for 3.3 V logic interfaces because its 5.0 V stand-off voltage (VWM) provides insufficient margin above the 3.3 V rail's peak operating voltage (typically ~3.63 V). Using it risks leakage-induced noise or false triggering. For 3.3 V systems, the SMDA03C-4 variant (3.3 V VWM) is the appropriate selection from the same family. The SMDA05C-4E3/TR7 is designed for 5 V tolerant or mixed-voltage interfaces.
SMDA05C-4E3/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:
- 4
- 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:
- 200pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SMDA05C-4E3/TR7 FAQ
1.How can I place an order for SMDA05C-4E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA05C-4E3/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 SMDA05C-4E3/TR7 reliable?
The price and inventory of SMDA05C-4E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA05C-4E3/TR7 is usually 5 days.
3.What payment methods are accepted for SMDA05C-4E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA05C-4E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA05C-4E3/TR7?
SMDA05C-4E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA05C-4E3/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 SMDA05C-4E3/TR7?
For technical support, including SMDA05C-4E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA05C-4E3/TR7 requirements.
6.How does Aetrix verify that SMDA05C-4E3/TR7 is sourced from the original manufacturer or authorized distributors?
All SMDA05C-4E3/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 SMDA05C-4E3/TR7 meets industry standards.
7.What is the process for return or replacement of SMDA05C-4E3/TR7?
All SMDA05C-4E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA05C-4E3/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 SMDA05C-4E3/TR7 part is unused and in its original packaging.
Return procedure for SMDA05C-4E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA05C-4E3/TR7 Tags
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