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Microchip Technology SM8LC05/TR13
- Part No.:
- SM8LC05/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SM8LC05/TR13.pdf
- Description:
- TVS DIODE 5VWM 11VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,513
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Product details
Overview
SM8LC05/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 clamping voltage of 9.8 V at 1 A. It provides board-level ESD protection per IEC 61000-4-2 (±15 kV contact) and EFT per IEC 61000-4-4 for dual I/O lines in microprocessor-based interfaces.
For engineers reviewing the SM8LC05/TR13 datasheet, SM8LC05/TR13 pinout, SM8LC05/TR13 application, or SM8LC05/TR13 equivalent, key selection criteria include verified bidirectional clamping performance, low 25 pF line-to-line capacitance, SO-8 thermal and mechanical compatibility, and compliance with industrial-level surge immunity standards.
Technical Context
The SM8LC05/TR13 integrates two identical, electrically isolated TVS diodes in a single SO-8 package, each configured as a symmetrical back-to-back Zener structure for bidirectional transient suppression. Its breakdown voltage is 6.0 V (min) at 1 mA, with clamping voltage specified at 9.8 V (max) under 1 A and 11 V (max) under 5 A 8/20 µs pulses.
Designed for board-level protection-not component-level-it operates across –55 °C to +150 °C and maintains stable leakage current (<40 µA at VWM) and temperature coefficient (+1 mV/°C for VBR). The device does not require external biasing and functions passively during transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 5.0 V - Maximum continuous operating voltage before conduction begins; matches 5 V logic bus systems. |
| Breakdown Voltage (VBR) | 6.0 V (min) @ 1 mA - Ensures reliable turn-on margin above normal signal swing without false triggering. |
| Clamping Voltage (VC) | 9.8 V (max) @ 1 A - Limits transient voltage seen by downstream ICs to safe levels during ESD/EFT events. |
| Peak Pulse Power | 500 W @ 8/20 µs - Sustains high-energy surges typical of industrial I/O coupling paths. |
| Line-to-Line Capacitance | 25 pF @ 1 MHz, 0 V - Minimizes signal distortion on high-speed digital lines (e.g., RS-485, USB 2.0). |
| Operating Temperature | –55 °C to +150 °C - Supports deployment in automotive engine control modules and industrial PLC I/O cards. |
Pinout & Package
SO-8 surface-mount package (JEDEC MS-012AC), 5.00 mm × 4.01 mm footprint, 1.75 mm max height, with pin #1 identified by dot marking. Thermal pad not present; standard reflow profile compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Channel 1 | Connects to protected line 1; forms one side of bidirectional clamp path with Pin 2. |
| 2 | Cathode of Channel 1 | Common cathode node shared with Pin 3; ties both channels to ground reference. |
| 3 | Cathode of Channel 2 | Shared cathode terminal-must be connected to system ground for effective clamping. |
| 4 | Anode of Channel 2 | Connects to protected line 2; completes second independent bidirectional clamp path with Pin 3. |
| 5–8 | No Connect / Thermal Relief | Not internally bonded; left floating or grounded for mechanical stability only-no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional dual-line protection | Two independent, isolated TVS paths enable simultaneous safeguarding of differential or separate I/O pairs without crosstalk. |
| IEC 61000-4-2 & -4-4 compliance | Validated to ±15 kV contact / ±20 kV air discharge (ESD) and 4 kV burst (EFT), meeting industrial immunity requirements. |
| Low 25 pF capacitance per line | Preserves signal integrity on 10–50 Mbps serial buses (e.g., CAN, RS-485) without added rise-time degradation. |
| SO-8 mechanical standardization | Enables drop-in replacement in existing layouts designed for SO-8 logic or interface ICs-no PCB redesign needed. |
Applications
| Industrial Serial Interface Protection | Automotive Body Control Module I/O |
|---|---|
Use Scenario: RS-485 transceivers in factory automation PLCs exposed to cable-induced surges and ESD during field maintenance. IC Role / Device Role / Timing Role: Board-level transient shunt placed directly at connector entry point to divert energy before reaching MAX485 or SN65HVD7x. Use Value: Clamps 5 A transients to ≤11 V while adding only 25 pF loading-maintaining signal fidelity up to 25 Mbps. | Use Scenario: LIN bus slave nodes in door module ECUs subject to load dump and jump-start induced spikes. IC Role / Device Role / Timing Role: Passive overvoltage clamp on LIN data line, referenced to chassis ground via shared cathode (Pins 2 & 3). Use Value: Withstands –55 °C to +150 °C ambient and clamps 8/20 µs surges to <12 V-protecting TJA1020 transceivers without derating. |
| Embedded Microcontroller GPIO Protection | Medical Diagnostic Equipment Port Shielding |
Use Scenario: Front-panel pushbuttons and LED indicators on ARM Cortex-M4-based patient monitors. IC Role / Device Role / Timing Role: Dual-channel ESD snubber on GPIO header pins, placed within 2 mm of connector to minimize inductance. Use Value: Limits ESD-induced latch-up risk with <40 µA leakage at 5 V and sub-10 ns response time-verified per IEC 61000-4-2. | Use Scenario: USB 2.0 host ports on ultrasound imaging systems requiring Class B EMC compliance. IC Role / Device Role / Timing Role: Low-capacitance TVS pair on D+ and D– lines, mounted adjacent to USB receptacle to suppress contact discharge. Use Value: 25 pF capacitance avoids USB full-speed timing violations; 500 W rating handles repeated 8 kV ESD events per IEC 60601-1-2. |
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 | Single-channel, SMA package; 600 W peak power; unidirectional; higher 500 pF capacitance. | Requires two devices for dual-line protection; unsuitable for high-speed data due to capacitance. | Use only when space allows discrete placement and speed is not critical. |
| SP1003-050 | Bi-directional, SOT-23-6; 350 W peak power; 5.0 V VWM; 22 pF capacitance. | Smaller footprint but lower surge rating; limited thermal mass for repetitive transients. | Prefer for portable medical devices where size outweighs industrial surge robustness. |
Compared with SMAJ5.0A and SP1003-050, the SM8LC05/TR13 uniquely delivers dual-line SO-8 integration, 500 W capability, and 25 pF capacitance-enabling compact, high-reliability board-level protection without layout compromise or performance trade-offs.
Availability
SM8LC05/TR13 is available at Aetrix Electronics and suitable for industrial serial interface protection, automotive body control module I/O, and embedded microcontroller GPIO protection requiring stable component supply and long-term manufacturability.
Supply support for SM8LC05/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 in harsh-environment electronics-emphasizing rugged packaging, wide temperature operation, and standardized SO-8 compatibility for drop-in design reuse.
FAQ
What is the standoff voltage rating of the SM8LC05/TR13?
The SM8LC05/TR13 has a standoff voltage (VWM) of 5.0 V, meaning it remains non-conductive under normal 5 V system operation and begins clamping only when transient voltages exceed its breakdown threshold of 6.0 V minimum. This rating ensures compatibility with standard 5 V TTL and CMOS logic buses without leakage or interference during steady-state use.
Does the SM8LC05/TR13 support bidirectional transient suppression?
Yes, the SM8LC05/TR13 provides true bidirectional clamping per channel using symmetrical Zener structures. Each channel (Pins 1–2 and Pins 3–4) conducts equally for positive and negative transients, making it suitable for AC-coupled or differential interfaces like RS-485 and LIN without polarity constraints. This behavior is confirmed in the MSC0333A.PDF datasheet Figure 2 waveform.
What is the maximum clamping voltage of the SM8LC05/TR13 at 5 A?
The SM8LC05/TR13 clamps to a maximum of 11 V at 5 A for an 8/20 µs current pulse, as specified in the Electrical Characteristics table of the MSC0333A.PDF datasheet. This value defines the upper voltage limit imposed on protected circuitry during high-current surge events, ensuring downstream ICs such as transceivers or microcontrollers remain within safe operating limits.
Is the SM8LC05/TR13 compliant with IEC 61000-4-2 ESD testing?
Yes, the SM8LC05/TR13 is explicitly designed and tested to meet IEC 61000-4-2 Level 4 (±15 kV contact discharge, ±20 kV air discharge). Its low clamping voltage and fast response time ensure effective protection of sensitive I/O transceivers and microcontroller pins against electrostatic discharge events encountered during handling and operation.
What package type and pin configuration does the SM8LC05/TR13 use?
The SM8LC05/TR13 uses an SO-8 surface-mount package with standardized JEDEC MS-012AC dimensions. Pin #1 is marked by a dot; Pins 1 and 4 serve as anode terminals for Channels 1 and 2 respectively, while Pins 2 and 3 form the shared cathode node. Pins 5–8 are unused and may be left floating or grounded for mechanical reinforcement only.
SM8LC05/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
SM8LC05/TR13 FAQ
1.How can I place an order for SM8LC05/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8LC05/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 SM8LC05/TR13 reliable?
The price and inventory of SM8LC05/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8LC05/TR13 is usually 5 days.
3.What payment methods are accepted for SM8LC05/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8LC05/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8LC05/TR13?
SM8LC05/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8LC05/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 SM8LC05/TR13?
For technical support, including SM8LC05/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8LC05/TR13 requirements.
6.How does Aetrix verify that SM8LC05/TR13 is sourced from the original manufacturer or authorized distributors?
All SM8LC05/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 SM8LC05/TR13 meets industry standards.
7.What is the process for return or replacement of SM8LC05/TR13?
All SM8LC05/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SM8LC05/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 SM8LC05/TR13 part is unused and in its original packaging.
Return procedure for SM8LC05/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8LC05/TR13 Tags
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