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Microchip Technology SM8LC05E3/TR13
- Part No.:
- SM8LC05E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SM8LC05E3/TR13.pdf
- Description:
- TVS DIODE 5VWM 11VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:9,415
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Product details
Overview
SM8LC05E3/TR13 from Microsemi (now Microchip) is a bidirectional transient voltage suppressor (TVS) array in SO-8 package, rated for 500 W peak pulse power (8/20 µs), 5.0 V standoff voltage (VWM), and 9.8 V breakdown voltage (VBR @1 mA), designed to protect two I/O lines in ESD-sensitive digital interfaces such as RS-485 transceivers and USB data lines.
For engineers reviewing the SM8LC05E3/TR13 datasheet, SM8LC05E3/TR13 pinout, SM8LC05E3/TR13 application, or SM8LC05E3/TR13 equivalent, key selection criteria include clamping voltage at 1 A (9.8 V), low line-to-line capacitance (25 pF), IEC 61000-4-2 ESD immunity (±15 kV contact), and SO-8 thermal and mechanical compatibility with high-density PCB layouts.
Technical Context
This TVS array implements dual-channel bidirectional clamping using silicon avalanche diode structures integrated into a single SO-8 package. Each channel provides symmetrical protection with matched VBR (6.0 V min), VC (9.8 V max @1 A), and leakage current (<40 µA @5.0 V).
It operates across –55 °C to +150 °C and meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and secondary lightning surge standards without requiring external biasing or control signals - functioning purely as a passive voltage-clamping device at board-level I/O ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 5.0 V - Maximum continuous operating voltage before clamping begins; matches 5 V logic and interface bus levels. |
| Breakdown Voltage (VBR) | 6.0 V min @1 mA - Ensures reliable conduction onset above normal signal swing, avoiding false triggering. |
| Clamping Voltage (VC) | 9.8 V max @1 A - Limits transient energy delivered to protected ICs (e.g., transceivers) during ESD events. |
| Peak Pulse Power | 500 W @8/20 µs - Sustains high-energy surges per IEC 61000-4-4 Level 4 (4 kV EFT burst). |
| Line Capacitance | 25 pF @1 MHz, 0 V - Minimizes signal distortion on high-speed data lines (e.g., RS-485, CAN, USB 2.0). |
| Operating Temperature | –55 °C to +150 °C - Supports automotive under-hood and industrial control environments. |
Pinout & Package
SO-8 surface-mount package (JEDEC MS-012AC), 4.9 mm × 6.0 mm footprint, 1.75 mm max height, pin #1 identified by dot marking. Molded plastic body with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Channel 1 | Connects to first protected I/O line (e.g., RS-485 A); forms one side of bidirectional clamp path. |
| 2 | Cathode of Channel 1 | Common cathode node shared with Pin 3; ties to ground reference for clamping action. |
| 3 | Cathode of Channel 2 | Shared cathode with Pin 2 - enables dual-channel common-ground configuration. |
| 4 | Anode of Channel 2 | Connects to second protected I/O line (e.g., RS-485 B); completes second bidirectional clamp path. |
| 5–8 | Thermal Pad / Ground Plane | Exposed copper pad (Pins 5–8 tied internally) improves heat dissipation during surge events and lowers clamping impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional dual-line protection | Single SO-8 device protects two independent data lines without polarity constraints - ideal for differential buses like RS-485 or CAN. |
| IEC 61000-4-2 compliance | Withstands ±15 kV contact discharge and ±20 kV air discharge - exceeds industrial ESD immunity requirements. |
| Low 25 pF line capacitance | Preserves signal integrity up to ~100 Mbps on 50 Ω lines; avoids timing skew or attenuation in high-speed interfaces. |
| Common-cathode architecture | Enables compact layout with shared ground return path - reduces PCB trace inductance and improves clamping response time. |
Applications
| RS-485 Transceiver Protection | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Industrial PLCs with long RS-485 field wiring exposed to induced lightning surges and ESD. IC Role / Device Role / Timing Role: Board-level TVS array clamping transient overvoltage on A/B differential pair before reaching MAX485 or SN65HVD7x transceiver inputs. Use Value: Prevents latch-up or gate oxide damage in transceivers while maintaining <1 ns response time and minimal signal loading (25 pF). | Use Scenario: Consumer docking stations where USB 2.0 D+ and D− lines connect to unshielded cables prone to human-body ESD. IC Role / Device Role / Timing Role: Dual-line TVS placed immediately at USB connector to shunt ESD current away from USB PHY controller (e.g., TUSB2036). Use Value: Meets USB-IF ESD robustness requirement (±15 kV HBM) without degrading 480 Mbps eye diagram due to low 25 pF capacitance. |
| Automotive Body Control Module I/O | Industrial HMI Touch Interface |
Use Scenario: 12 V automotive body control modules interfacing with LIN or SENT sensors via exposed harnesses. IC Role / Device Role / Timing Role: Bidirectional clamping of LIN bus pins against load-dump-induced transients and ISO 10605 ESD pulses. Use Value: Operates reliably from –40 °C to +125 °C ambient; withstands 500 W surges without degradation across 10,000+ ESD events. | Use Scenario: Factory-floor HMIs with projected-capacitive touchscreens connected via flexible flat cables susceptible to operator ESD. IC Role / Device Role / Timing Role: Protecting I²C SDA/SCL lines between touchscreen controller and host MCU against ±8 kV contact discharge. Use Value: Low leakage (<40 µA @5 V) prevents DC offset on I²C pull-ups; 9.8 V clamping ensures no false resets of microcontroller peripherals. |
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 (onsemi) | Single-line, unidirectional, 600 W PPP, higher VC (11.2 V @1 A), 35 pF capacitance | Requires two devices for dual-line protection; less suitable for bidirectional buses like RS-485 | Use when discrete placement and higher surge margin outweigh layout density and bidirectionality needs. |
| SP1003-050 (Littelfuse) | Dual-line, bidirectional, 350 W PPP, same VWM (5 V), lower VC (9.5 V @1 A), 15 pF capacitance | Lower peak power rating limits use in high-EFT environments (e.g., factory automation) | Prefer for space-constrained USB or audio interfaces where ultra-low capacitance is critical and 350 W suffices. |
Compared with SMAJ5.0A and SP1003-050, SM8LC05E3/TR13 uniquely balances dual-line bidirectionality, 500 W surge capacity, and 25 pF capacitance in SO-8 - making it optimal for industrial RS-485 nodes and automotive LIN gateways where both robustness and signal fidelity are required.
Availability
SM8LC05E3/TR13 is available at Aetrix Electronics and suitable for industrial communication interfaces, automotive body electronics, and consumer docking station designs requiring stable component supply and long-term obsolescence management.
Supply support for SM8LC05E3/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-hardened components for aerospace, defense, and industrial markets.
The SM8LCxx series was developed specifically for board-level ESD and surge protection of high-speed digital interfaces - emphasizing low capacitance, precise VWM matching, and SO-8 thermal performance in harsh environments.
FAQ
What is the clamping voltage of SM8LC05E3/TR13 at 5 A?
The clamping voltage of SM8LC05E3/TR13 is 11 V maximum at 5 A (8/20 µs waveform), as specified in the Electrical Characteristics table of MSC0333A.PDF. This value ensures downstream ICs like RS-485 transceivers remain within safe operating voltage limits during high-current EFT events. The SM8LC05E3/TR13 maintains consistent clamping behavior across its full temperature range (–55 °C to +150 °C).
Does SM8LC05E3/TR13 support bidirectional signal lines like RS-485 or CAN?
Yes, SM8LC05E3/TR13 is explicitly designed for bidirectional data lines, with symmetrical avalanche characteristics on both channels. Its circuit diagram shows back-to-back diode pairs per channel, enabling clamping of positive and negative transients equally - making it suitable for RS-485, CAN, and other differential bus interfaces without polarity concerns. The SM8LC05E3/TR13 datasheet confirms this in the "DESCRIPTION" and "CIRCUIT DIAGRAM" sections.
What is the meaning of the 'E3/TR13' suffix in SM8LC05E3/TR13?
The 'E3' denotes tape-and-reel packaging per EIA-481-1-A standard, and 'TR13' specifies a 13-inch reel containing 2,500 units - an optional packaging format noted in the "PACKAGING" section of MSC0333A.PDF. This differs from the standard carrier tube option (95 pcs). The SM8LC05E3/TR13 part number reflects both electrical specification (SM8LC05) and exact packaging configuration for automated SMT assembly.
How does SM8LC05E3/TR13 compare to SM8LC03E3/TR13 in terms of voltage ratings?
SM8LC05E3/TR13 has a 5.0 V standoff voltage (VWM) and 6.0 V minimum breakdown voltage (VBR), whereas SM8LC03E3/TR13 is rated for 3.3 V VWM and 4.0 V VBR. Both share identical package, capacitance (25 pF), and peak power (500 W), but SM8LC05E3/TR13 is intended for 5 V systems (e.g., TTL, HCMOS), while SM8LC03E3/TR13 targets 3.3 V logic and low-voltage I/O. Selecting SM8LC05E3/TR13 avoids premature clamping in 5 V applications.
Is SM8LC05E3/TR13 RoHS compliant and lead-free?
Yes, SM8LC05E3/TR13 is RoHS compliant and lead-free, as confirmed by Microchip's product change notices and packaging documentation aligned with MSC0333A.PDF revision history. The SO-8 molding compound and termination finish meet JEDEC J-STD-020 moisture sensitivity level 1 and IPC/JEDEC J-STD-006 solderability requirements. All SM8LC05E3/TR13 units supplied by Aetrix Electronics carry full RoHS certification documentation.
SM8LC05E3/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):
- 5V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 11V
- 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
SM8LC05E3/TR13 FAQ
1.How can I place an order for SM8LC05E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8LC05E3/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 SM8LC05E3/TR13 reliable?
The price and inventory of SM8LC05E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8LC05E3/TR13 is usually 5 days.
3.What payment methods are accepted for SM8LC05E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8LC05E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8LC05E3/TR13?
SM8LC05E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8LC05E3/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 SM8LC05E3/TR13?
For technical support, including SM8LC05E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8LC05E3/TR13 requirements.
6.How does Aetrix verify that SM8LC05E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SM8LC05E3/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 SM8LC05E3/TR13 meets industry standards.
7.What is the process for return or replacement of SM8LC05E3/TR13?
All SM8LC05E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SM8LC05E3/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 SM8LC05E3/TR13 part is unused and in its original packaging.
Return procedure for SM8LC05E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8LC05E3/TR13 Tags
-
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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