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Microchip Technology SM8LC24E3/TR13
- Part No.:
- SM8LC24E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SM8LC24E3/TR13.pdf
- Description:
- TVS DIODE 24VWM 55VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,418
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Product details
Overview
SM8LC24E3/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), 24 V standoff voltage (VWM), 26.7 V minimum breakdown voltage (VBR), and 55 V clamping voltage at 5 A. It protects two I/O lines in industrial communication interfaces against ESD per IEC 61000-4-2, EFT per IEC 61000-4-4, and lightning-induced surges.
For engineers reviewing the SM8LC24E3/TR13 datasheet, SM8LC24E3/TR13 pinout, SM8LC24E3/TR13 application, or SM8LC24E3/TR13 equivalent, key selection criteria include VWM ≥ circuit operating voltage, low 25 pF line-to-line capacitance for high-speed signal integrity, and SO-8 footprint compatibility with board-level surge protection layouts.
Technical Context
This TVS array employs silicon avalanche diode technology in a monolithic dual-channel configuration, enabling electrically isolated protection of two bidirectional data lines without cross-coupling. Each channel features symmetric clamping behavior with ±24 V standoff and matched VBR (26.7–30 V) and VC (43–55 V) across specified current levels.
Designed for board-level placement at I/O connectors or interface ICs, it operates from –55 °C to +150 °C and maintains ≤1 µA leakage at VWM, ensuring minimal impact on signal DC bias and low-power logic interfaces such as RS-485 transceivers and CAN physical layers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 24 V - Maximum continuous operating voltage before conduction; must exceed circuit's peak signal or supply voltage. |
| Breakdown Voltage (VBR) | 26.7 V min @ 1 mA - Confirmed avalanche initiation threshold; ensures reliable triggering above normal operating range. |
| Clamping Voltage (VC) | 55 V max @ 5 A - Maximum voltage seen by protected circuit during 8/20 µs surge; limits stress on downstream ICs. |
| Peak Pulse Power | 500 W @ 8/20 µs - Sustains high-energy transients without failure; validated per IEC 61000-4-5 waveform. |
| Line-to-Line Capacitance | 25 pF @ 1 MHz, 0 V - Preserves signal integrity up to ~100 MHz; suitable for RS-422/RS-485 and USB 2.0 data lines. |
| Leakage Current | ≤1 µA @ VWM - Negligible loading on high-impedance inputs; avoids false triggering or bias shift in CMOS/TTL receivers. |
| Operating Temperature | –55 °C to +150 °C - Supports under-hood automotive, industrial PLC, and outdoor telecom equipment deployment. |
Pinout & Package
SO-8 surface-mount package with gull-wing leads; 5.0 mm × 4.0 mm body, 1.27 mm pitch, 1.75 mm max height; pin #1 identified by dot marking on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Channel 1 | Connects to first protected line (e.g., RS-485 A); forms bidirectional clamp with Pin 2. |
| 2 | Cathode of Channel 1 | Common ground reference for Channel 1; ties to system GND plane for low-inductance surge return path. |
| 3 | Anode of Channel 2 | Connects to second protected line (e.g., RS-485 B); forms bidirectional clamp with Pin 4. |
| 4 | Cathode of Channel 2 | Shared cathode with Pin 2 - enables single-point grounding for both channels; reduces PCB routing complexity. |
| 5–8 | No Connect / Thermal Pad | Not internally bonded; may be left floating or tied to GND for thermal enhancement (per layout guidelines). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional dual-line protection | Single SO-8 device safeguards two independent I/O paths without external polarity components. |
| IEC 61000-4-2/4-4 compliance | Validated for ±15 kV contact / ±20 kV air discharge ESD and 4 kV EFT bursts - meets industrial immunity standards. |
| Low 25 pF capacitance | Minimizes signal rise-time degradation and reflection on differential buses operating up to 25 Mbps. |
| Electrically isolated channels | Prevents coupling between protected lines - critical for noise-sensitive analog or mixed-signal I/O domains. |
| High-temperature operation | Rated for continuous use at +150 °C ambient - supports placement near power converters or motor drivers. |
Applications
| Industrial RS-485 Networks | Automotive Body Control Modules |
|---|---|
Use Scenario: Protecting half-duplex 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 TVS array placed at connector entry point; clamps transients before they reach MAX1487 or SN65HVD7x transceivers. Use Value: Limits clamped voltage to ≤55 V during 5 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding LIN bus or CAN FD physical layer signals in door module ECUs subjected to ISO 10605 ESD events and load dump coupling. IC Role / Device Role / Timing Role: Dual-line protector for bidirectional LIN data line and wake-up line; shares common cathode to minimize footprint. Use Value: 24 V VWM aligns with 12 V automotive nominal systems; 25 pF capacitance avoids distortion of 20 kbps LIN timing edges. |
| Medical Patient Monitoring Ports | Point-of-Sale Terminal Interfaces |
Use Scenario: Shielding USB 2.0 D+/D− lines on bedside monitors connected to peripheral devices prone to operator ESD. IC Role / Device Role / Timing Role: High-speed bidirectional clamp located within 2 cm of USB Type-B receptacle; grounded via short trace to chassis GND. Use Value: 25 pF capacitance preserves USB full-speed eye diagram integrity; 55 V clamping prevents damage to USB PHY internal ESD structures. | Use Scenario: Protecting RS-232 serial ports on retail kiosks handling frequent cable hot-plug/unplug and static-prone environments. IC Role / Device Role / Timing Role: Dual-line TVS on TX/RX lines upstream of MAX3232 level translators; mounted adjacent to DB9 connector. Use Value: 500 W surge rating withstands repeated 4 kV EFT bursts per IEC 61000-4-4; SO-8 footprint allows direct replacement of legacy P6SMB arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Unidirectional, single-line, SMA package; 24 V VWM, 38.9 V VC @ 12.5 A; higher capacitance (≈100 pF) | Requires two devices and external polarity management for dual-line bidirectional protection | Use only when board space permits discrete placement and unidirectional clamping suffices. |
| SP1003-02UTG | Bi-directional, dual-line, SOT-23-6; 24 V VWM, 50 V VC @ 5 A; lower 15 pF capacitance but 300 W peak power rating | Limited to lower-energy threats; not rated for 500 W 8/20 µs surges per IEC 61000-4-5 | Select when ultra-low capacitance is prioritized over high-energy surge margin. |
Compared with SMAJ24A and SP1003-02UTG, SM8LC24E3/TR13 uniquely delivers 500 W bidirectional dual-line protection in SO-8 with 25 pF capacitance - balancing surge robustness, signal fidelity, and layout efficiency for industrial I/O interfaces.
Availability
SM8LC24E3/TR13 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply and long-term obsolescence management.
Supply support for SM8LC24E3/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 TVS array series was engineered specifically for board-level ESD/EFT protection of high-speed digital interfaces, emphasizing low capacitance, precise VWM tolerance, and SO-8 manufacturability for automated SMT assembly.
FAQ
What is the standoff voltage rating of SM8LC24E3/TR13, and how does it relate to circuit protection?
The SM8LC24E3/TR13 has a standoff voltage (VWM) of 24 V, meaning it remains non-conductive below this DC or peak AC voltage. This rating ensures the device does not interfere with normal operation of 24 V industrial control signals while reliably triggering during overvoltage events. Selecting SM8LC24E3/TR13 for circuits with ≤24 V peak operating voltage prevents false clamping and ensures robust ESD immunity without signal distortion.
Does SM8LC24E3/TR13 support bidirectional signal lines like RS-485 or CAN?
Yes, SM8LC24E3/TR13 is explicitly designed for bidirectional data lines. Its symmetrical avalanche structure provides identical clamping performance for positive and negative transients on each channel, making it ideal for protecting differential interfaces such as RS-485, RS-422, and LIN bus lines. The dual-channel SO-8 layout simplifies routing for A/B pairs without polarity concerns.
What is the maximum clamping voltage of SM8LC24E3/TR13 under a 5 A transient, and why does it matter?
The SM8LC24E3/TR13 exhibits a maximum clamping voltage (VC) of 55 V at 5 A for an 8/20 µs waveform. This value defines the highest voltage imposed on protected circuitry during surge events. Keeping VC below the absolute maximum ratings of downstream transceivers (e.g., <60 V for many RS-485 ICs) prevents permanent damage and ensures system-level EMC compliance.
How does the 25 pF capacitance of SM8LC24E3/TR13 affect high-speed data lines?
The 25 pF line-to-line capacitance of SM8LC24E3/TR13 is measured at 1 MHz and 0 V bias, and it remains stable across operating voltages. This low value minimizes signal attenuation and edge rounding on data lines running up to 25 Mbps (e.g., RS-485 at 10 Mbit/s), preserving eye diagram margins and reducing bit error rates - critical for reliable communication in noisy industrial environments.
Is SM8LC24E3/TR13 compatible with standard SO-8 PCB footprints and reflow profiles?
Yes, SM8LC24E3/TR13 uses a JEDEC-standard SO-8 package (5.0 mm × 4.0 mm, 1.27 mm pitch) with gull-wing leads. It is compatible with IPC-7351B SOIC-NOM footprints and withstands standard lead-free reflow profiles (peak 260 °C, 60 sec max). Pin #1 orientation is marked by a dot on the package top, ensuring correct placement during automated assembly of SM8LC24E3/TR13.
SM8LC24E3/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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 55V
- 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
SM8LC24E3/TR13 FAQ
1.How can I place an order for SM8LC24E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8LC24E3/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 SM8LC24E3/TR13 reliable?
The price and inventory of SM8LC24E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8LC24E3/TR13 is usually 5 days.
3.What payment methods are accepted for SM8LC24E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8LC24E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8LC24E3/TR13?
SM8LC24E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8LC24E3/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 SM8LC24E3/TR13?
For technical support, including SM8LC24E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8LC24E3/TR13 requirements.
6.How does Aetrix verify that SM8LC24E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SM8LC24E3/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 SM8LC24E3/TR13 meets industry standards.
7.What is the process for return or replacement of SM8LC24E3/TR13?
All SM8LC24E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SM8LC24E3/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 SM8LC24E3/TR13 part is unused and in its original packaging.
Return procedure for SM8LC24E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8LC24E3/TR13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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