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Microchip Technology SM8LC03E3/TR13
- Part No.:
- SM8LC03E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SM8LC03E3/TR13.pdf
- Description:
- TVS DIODE 3.3VWM 9VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:7,895
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Product details
Overview
SM8LC03E3/TR13 from Microsemi (now Microchip Technology) is a bidirectional transient voltage suppressor (TVS) array in SO-8 package, rated for 500 W peak pulse power (8/20 µs), 3.3 V standoff voltage (VWM), and 7 V clamping voltage at 1 A. It provides board-level ESD protection per IEC 61000-4-2 (±15 kV air, ±8 kV contact) and EFT per IEC 61000-4-4 for two I/O lines in microprocessor-based communication interfaces.
For engineers reviewing the SM8LC03E3/TR13 datasheet, SM8LC03E3/TR13 pinout, SM8LC03E3/TR13 application, or SM8LC03E3/TR13 equivalent, key selection criteria include standoff voltage matching system operating voltage, clamping performance under 1–5 A transients, low 25 pF line-to-line capacitance for high-speed data integrity, and SO-8 thermal and layout compatibility with I/O transceivers and memory interfaces.
Technical Context
This TVS array uses silicon avalanche diode technology to clamp transient overvoltages before they reach downstream circuitry. Each of its two symmetrical channels operates bidirectionally with identical VWM = 3.3 V, VBR(min) = 4.0 V, and VC = 7 V @ 1 A - enabling robust protection without DC biasing requirements.
The device is characterized across –55 °C to +150 °C, supports <0.01% pulse repetition rate, and maintains ≤200 µA leakage at VWM, ensuring minimal impact on signal integrity and power budget in always-on I/O paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 3.3 V - matches nominal 3.3 V logic supply rails; prevents conduction during normal operation |
| Breakdown Voltage (VBR) | Min 4.0 V @ 1 mA - ensures reliable turn-on margin above VWM under ESD stress |
| Clamping Voltage (VC) | 7 V @ 1 A - limits voltage seen by protected IC to safe level during fast transients |
| Peak Pulse Power | 500 W (8/20 µs) - sustains high-energy surges from ESD/EFT without degradation |
| Line-to-Line Capacitance | 25 pF @ 1 MHz - preserves signal integrity up to ~100 Mbps in USB 1.1, RS-232, or GPIO applications |
| Operating Temperature | –55 °C to +150 °C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
SO-8 surface-mount package (JEDEC MS-012AC), 4.9 mm × 3.9 mm footprint, 1.75 mm max height, with pin #1 identified by dot marking. Thermal pad not present; standard SO-8 solder profile applies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Channel 1 | Connects to first protected I/O line; forms one side of bidirectional clamping path |
| 2 | Cathode of Channel 1 | Connects to common reference (GND or VCC); completes clamping loop for Line 1 |
| 3 | Anode of Channel 2 | Connects to second protected I/O line; independent clamping path from Line 1 |
| 4 | Cathode of Channel 2 | Shared cathode node with Pin 2 - enables dual-line protection with single ground return |
| 5–8 | No Connect / Thermal Pad Absent | Pins 5–8 are unused; no internal connection or thermal function in this variant |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional dual-line protection | Enables symmetric surge suppression on two independent I/O signals without polarity constraints |
| IEC 61000-4-2 & -4-4 compliance | Validated for ±15 kV air-gap and ±8 kV contact ESD, plus 4 kV EFT burst immunity |
| Low 25 pF capacitance per line pair | Minimizes signal rise-time degradation and reflection in 3.3 V digital interfaces |
| Electrically isolated channels | Prevents cross-talk between protected lines; avoids shared-path failure modes |
Applications
| USB 1.1 Transceiver Protection | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protecting D+ and D– lines of full-speed USB transceivers against factory handling ESD and field-induced surges. IC Role / Device Role / Timing Role: Board-level TVS array clamping transients before they reach the USB PHY IC's input pins. Use Value: Maintains 25 pF capacitance to preserve 12 Mbps signaling integrity while limiting clamped voltage to ≤7 V at 1 A. | Use Scenario: Safeguarding isolated RS-485 or CAN controller I/O pins in programmable logic controllers exposed to factory floor EFT noise. IC Role / Device Role / Timing Role: Standoff-rated (3.3 V) transient suppressor placed directly at connector entry point. Use Value: Withstands –55 °C to +150 °C ambient and delivers 500 W surge capacity without derating in enclosure-constrained designs. |
| Embedded Memory Interface | Automotive Body Control Module |
Use Scenario: Shielding SDIO or SPI data lines connected to DRAM/SRAM in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-leakage (≤200 µA) TVS array preserving standby current budgets while guarding against assembly-line ESD. Use Value: 3.3 V VWM aligns precisely with memory interface supply; 7 V clamping prevents latch-up in CMOS I/O cells. | Use Scenario: Protecting LIN bus or sensor interface lines in body control modules subject to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level transient suppressor deployed after primary front-end protection, targeting fast-edge ESD events. Use Value: Bidirectional operation handles both positive and negative transients on unidirectional LIN lines without polarity concerns. |
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-channel, DO-214AC package; 3.3 V VWM, 11.2 V VC @ 1 A; higher clamping voltage | Requires two devices for dual-line protection; larger PCB area; no shared-cathode integration | Use when discrete placement flexibility outweighs space and BOM count constraints |
| SP1003-030 | 3.3 V VWM, 20 pF capacitance, 12 kW peak power; SOT-23-6 package; lower capacitance but lower surge rating | Optimized for ultra-high-speed interfaces (e.g., HDMI DDC); insufficient for 500 W IEC-compliant surges | Prefer for bandwidth-critical sub-100 Mbps links where 500 W rating is unnecessary |
Compared with SMAJ3.3A and SP1003-030, SM8LC03E3/TR13 uniquely delivers integrated dual-line protection in SO-8 with 7 V clamping and 500 W rating - balancing compactness, low capacitance, and certified surge immunity for 3.3 V I/O systems.
Availability
SM8LC03E3/TR13 is available at Aetrix Electronics and suitable for USB transceiver protection, industrial PLC I/O hardening, and embedded memory interface safeguarding requiring stable component supply and long-term production continuity.
Supply support for SM8LC03E3/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
Microsemi (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-tolerant components for aerospace, defense, and industrial markets.
The SM8LCXX TVS array series was engineered specifically for board-level ESD/EFT protection of 3.3 V–24 V digital interfaces in harsh environments - emphasizing low capacitance, precise standoff matching, and JEDEC-standard SO-8 manufacturability.
FAQ
What is the clamping voltage of SM8LC03E3/TR13 at 5 A, and why does it matter?
The clamping voltage of SM8LC03E3/TR13 is 9 V at 5 A (per MSC0333A.PDF Figure 2). This value defines the maximum voltage imposed on protected circuitry during high-current transients like EFT bursts. Keeping VC ≤9 V ensures TTL/CMOS I/O structures remain below absolute maximum ratings, preventing gate oxide damage or latch-up in microcontrollers and transceivers connected to the protected lines.
Does SM8LC03E3/TR13 require external biasing or direction selection?
No, SM8LC03E3/TR13 does not require external biasing or direction selection. Its internal symmetrical diode architecture enables fully bidirectional operation - meaning it protects both positive and negative transients on each channel without polarity configuration. This simplifies design for AC-coupled or floating I/O lines such as USB D+/D– or RS-485 differential pairs.
How is the SO-8 package of SM8LC03E3/TR13 mounted, and what is the pin 1 identifier?
The SM8LC03E3/TR13 uses a standard SO-8 surface-mount package with pin #1 identified by a molded dot on the top surface of the package. Mounting follows JEDEC MS-012AC land pattern dimensions (e.g., 0.050" pitch, 0.150"–0.158" body width), and reflow profiles must comply with Microsemi's specified thermal limits to avoid delamination or parametric shift.
Can SM8LC03E3/TR13 be used in automotive applications, and what temperature range does it support?
Yes, SM8LC03E3/TR13 is qualified for automotive applications with an operating temperature range of –55 °C to +150 °C (per MSC0333A.PDF). This makes it suitable for under-hood and cabin modules including body control units and infotainment systems, provided board-level layout adheres to IEC 61000-4-2/4-4 test coupling paths and grounding practices.
What is the leakage current specification for SM8LC03E3/TR13 at its standoff voltage?
The leakage current (ID) of SM8LC03E3/TR13 is specified as ≤200 µA at VWM = 3.3 V and 25 °C (per MSC0333A.PDF Electrical Characteristics table). This low leakage ensures minimal impact on battery-powered or low-power I/O circuits, preserving sleep-mode current budgets and avoiding false triggering in high-impedance sensing nodes.
SM8LC03E3/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:
- 2
- 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:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 25pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SM8LC03E3/TR13 FAQ
1.How can I place an order for SM8LC03E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8LC03E3/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 SM8LC03E3/TR13 reliable?
The price and inventory of SM8LC03E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8LC03E3/TR13 is usually 5 days.
3.What payment methods are accepted for SM8LC03E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8LC03E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8LC03E3/TR13?
SM8LC03E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8LC03E3/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 SM8LC03E3/TR13?
For technical support, including SM8LC03E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8LC03E3/TR13 requirements.
6.How does Aetrix verify that SM8LC03E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SM8LC03E3/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 SM8LC03E3/TR13 meets industry standards.
7.What is the process for return or replacement of SM8LC03E3/TR13?
All SM8LC03E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SM8LC03E3/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 SM8LC03E3/TR13 part is unused and in its original packaging.
Return procedure for SM8LC03E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8LC03E3/TR13 Tags
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