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Microchip Technology SMDA24-6E3/TR13
- Part No.:
- SMDA24-6E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA24-6E3/TR13.pdf
- Description:
- TVS DIODE 24VWM 55VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,658
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Product details
Overview
SMDA24-6E3/TR13 from Microsemi (now Microchip Technology) is a unidirectional transient voltage suppressor (TVS) array in SO-8 package, rated for 300 W peak pulse power (8/20 µs), 24 V standoff voltage (VWM), and clamping voltage of 43 V at 1 A. It protects six I/O lines in industrial and telecom interface circuits against ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges.
For engineers reviewing the SMDA24-6E3/TR13 datasheet, SMDA24-6E3/TR13 pinout, SMDA24-6E3/TR13 application, or SMDA24-6E3/TR13 equivalent, key selection criteria include VWM ≥ circuit operating voltage, clamping performance under 1–5 A surge current, SO-8 board-level mounting compatibility, and leakage current ≤1 µA at 24 V.
Technical Context
This TVS array implements six independent unidirectional avalanche diode junctions in a single SO-8 package, each with a minimum breakdown voltage of 26.7 V and maximum clamping voltage of 55 V at 5 A. Its thermal design supports continuous operation from –55 °C to +150 °C, and its low 88 pF line-to-ground capacitance at 1 MHz enables use on high-speed data lines without signal integrity degradation.
The device uses standard SO-8 leadframe construction with defined Pin 1 dot marking, adheres to EIA-481-1-A tape-and-reel packaging (13" reel, 2500 pcs), and is optimized for board-level protection-no external biasing or control logic required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 24 V - Maximum continuous DC or RMS operating voltage the protected line may sustain without triggering conduction |
| Breakdown Voltage (VBR) | 26.7 V min @ 1 mA - Avalanche onset threshold ensuring reliable turn-on during transients exceeding normal operating range |
| Clamping Voltage (VC) | 43 V max @ 1 A - Peak voltage seen by downstream circuitry during 8/20 µs surge, limiting stress on I/O transceivers |
| Peak Pulse Power | 300 W @ 8/20 µs - Sustained energy absorption capability per line without failure under standardized surge waveform |
| Leakage Current (ID) | ≤1 µA @ VWM - Negligible DC loading on 24 V interface lines, preserving signal integrity and power budget |
| Capacitance (C) | 88 pF @ 1 MHz, 0 V - Low enough for RS-485, CAN, and industrial digital I/O without bandwidth limitation or timing skew |
| Operating Temperature | –55 °C to +150 °C - Validated performance across extended industrial and automotive under-hood environments |
Pinout & Package
SO-8 surface-mount package with gull-wing leads, 1.27 mm pitch, 4.9 mm × 6.0 mm body size, and Pin 1 identified by dot marking on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | I/O Line 1 Anode | Unidirectional TVS anode connection for first protected data line; cathode tied internally to common GND |
| 2 | I/O Line 2 Anode | Unidirectional TVS anode for second protected line; shares common cathode/GND return path |
| 3 | I/O Line 3 Anode | Unidirectional TVS anode for third line; enables compact 6-line protection with single ground plane tie |
| 4 | GND | Common cathode reference for all six TVS elements; must be low-inductance connection to system ground |
| 5 | GND | Second ground terminal for improved current sharing and thermal distribution under multi-line surge events |
| 6 | I/O Line 4 Anode | Unidirectional TVS anode for fourth line; symmetric layout minimizes trace inductance imbalance |
| 7 | I/O Line 5 Anode | Unidirectional TVS anode for fifth line; pin assignment matches SO-8 footprint standard for layout reuse |
| 8 | I/O Line 6 Anode | Unidirectional TVS anode for sixth line; full 6-line coverage without external discrete components |
Key Features
| Feature | Design Value |
|---|---|
| 6-line unidirectional protection | Single SO-8 device replaces six discrete TVS diodes, reducing PCB area by >70% and assembly cost |
| IEC 61000-4-2 / -4-4 compliance | Validated 30 kV contact / 25 kV air ESD immunity and 4 kV EFT burst tolerance per line |
| Low 88 pF capacitance | Enables use on 10 Mbps RS-485, 1 Mbps CAN FD, and 25 MHz parallel bus interfaces without signal distortion |
| –55 °C to +150 °C operation | Supports deployment in motor drives, base station power supplies, and railway signaling without derating |
| SO-8 tape-and-reel packaging | Compatible with standard SMT pick-and-place equipment and automated optical inspection (AOI) workflows |
Applications
| Industrial RS-485 Networks | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of half-duplex RS-485 transceivers in factory automation PLC backplanes exposed to cable discharge events and ground loop transients. IC Role / Device Role / Timing Role: Board-level transient suppressor placed directly at connector entry point, shunting surge energy to chassis ground before reaching MAX1487 or SN65HVD72. Use Value: Limits clamped voltage to ≤43 V at 1 A, preventing latch-up or oxide rupture in 24 V-tolerant transceivers while maintaining <100 ps propagation delay impact. | Use Scenario: Safeguarding LIN bus and sensor I/O lines in door module ECUs subjected to ISO 7637-2 pulse 1/2a/3a and ESD gun discharges. IC Role / Device Role / Timing Role: Unidirectional TVS array connected between each LIN slave node pin and local ground plane, absorbing coupled transients from adjacent high-current actuators. Use Value: 88 pF capacitance avoids LIN timing margin violation (bit period ≥ 200 µs), and 24 V VWM matches typical 24 V supply rail in commercial vehicle modules. |
| Telecom Power Interface Boards | Programmable Logic Controller I/O Cards |
Use Scenario: Secondary surge protection on 24 V DC input rails and Ethernet PHY management lines in remote radio head (RRH) power supplies. IC Role / Device Role / Timing Role: Final-stage TVS after primary MOV/GDT stage, clamping residual 8/20 µs surges to safe levels for PMICs and microcontrollers. Use Value: 300 W peak power rating handles up to 15 A surge current per line, enabling robust two-stage protection architecture compliant with ITU-T K.20/21. | Use Scenario: Input/output protection on modular PLC digital I/O cards handling 24 V dry-contact and sinking/sourcing signals in harsh manufacturing environments. IC Role / Device Role / Timing Role: Per-channel TVS element integrated into screw-terminal header interface, suppressing EFT bursts induced by relay coil switching and motor drive noise. Use Value: ≤1 µA leakage at 24 V prevents false triggering of 24 V optocoupler inputs, and –55 °C to +150 °C rating ensures reliability in uncooled control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Single-line SMA package; 400 W peak power; 38.9 V clamping @ 1 A; 100 pF capacitance | Requires six discrete placements; higher clamping voltage increases risk to 3.3 V/5 V logic; unsuitable for space-constrained layouts | Select when discrete placement is preferred or SO-8 footprint is unavailable; verify layout clearance for six SMA devices |
| SP1003-02HTG | Bi-directional configuration; 150 W peak power; 33 V clamping @ 1 A; 15 pF capacitance | Not suitable for DC-biased lines like 24 V I/O; lower power rating limits use in high-energy surge zones | Prefer for AC-coupled or symmetrical signal lines (e.g., USB D+/D–); avoid where unidirectional blocking is required |
Compared with SMAJ24A and SP1003-02HTG, SMDA24-6E3/TR13 delivers integrated 6-line protection with lower clamping (43 V vs. 38.9–33 V), tighter VWM tolerance (24 V exact), and optimized SO-8 layout efficiency-making it superior for dense industrial I/O card designs requiring coordinated multi-line surge response.
Availability
SMDA24-6E3/TR13 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and automotive electronics requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for SMDA24-6E3/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 ICs for aerospace, defense, and industrial markets.
The SMDAxx-6 TVS array product line was engineered specifically for board-level ESD/EFT protection of multi-line digital interfaces in harsh electromagnetic environments, emphasizing low capacitance, precise VWM, and SO-8 manufacturability.
FAQ
What is the standoff voltage rating of SMDA24-6E3/TR13?
The SMDA24-6E3/TR13 has a standoff voltage (VWM) of 24 V, meaning it remains non-conductive under continuous 24 V DC or RMS conditions. This value is selected to match standard 24 V industrial control and telecom interface rails, ensuring no leakage or false triggering during normal operation while providing margin for ripple and tolerance.
How many protected lines does SMDA24-6E3/TR13 support?
SMDA24-6E3/TR13 supports exactly six unidirectional data or interface lines, with Pins 1, 2, 3, 6, 7, and 8 serving as individual anode connections and Pins 4 and 5 tied to common cathode (GND). This configuration eliminates the need for six separate TVS diodes and simplifies routing on dense I/O boards.
Is SMDA24-6E3/TR13 compliant with IEC 61000-4-2 and IEC 61000-4-4?
Yes, SMDA24-6E3/TR13 is explicitly designed and tested to meet IEC 61000-4-2 (ESD) up to ±30 kV contact discharge and IEC 61000-4-4 (EFT) up to ±4 kV, as confirmed in the MSC0332A.PDF datasheet. Its 300 W peak power rating and fast response time ensure robust immunity in real-world industrial and telecom surge environments.
What is the clamping voltage of SMDA24-6E3/TR13 at 5 A surge current?
At 5 A (8/20 µs pulse), the SMDA24-6E3/TR13 clamps to a maximum of 55 V, as specified in the Electrical Characteristics table. This value defines the upper voltage limit imposed on protected circuitry during high-current transients, critical for ensuring downstream 24 V-rated transceivers remain within safe operating area.
Does SMDA24-6E3/TR13 require external biasing or control circuitry?
No, SMDA24-6E3/TR13 is a passive, self-contained TVS array requiring no external bias, enable signals, or control logic. It operates solely based on voltage threshold conduction-each of its six unidirectional elements activates automatically when line voltage exceeds VBR (~26.7 V), diverting surge current to GND without intervention.
What is the capacitance of SMDA24-6E3/TR13 and how does it affect high-speed interfaces?
SMDA24-6E3/TR13 exhibits 88 pF capacitance per line at 1 MHz and 0 V bias. This low value ensures minimal loading on 24 V digital I/O, RS-485, and CAN interfaces-preserving signal rise/fall times and avoiding timing violations in systems operating up to 10 Mbps, as verified in application circuits documented for the SMDAxx-6 family.
SMDA24-6E3/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:
- 6
- Bidirectional Channels:
- -
- 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:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 88pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SMDA24-6E3/TR13 FAQ
1.How can I place an order for SMDA24-6E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA24-6E3/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 SMDA24-6E3/TR13 reliable?
The price and inventory of SMDA24-6E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA24-6E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMDA24-6E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA24-6E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA24-6E3/TR13?
SMDA24-6E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA24-6E3/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 SMDA24-6E3/TR13?
For technical support, including SMDA24-6E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA24-6E3/TR13 requirements.
6.How does Aetrix verify that SMDA24-6E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMDA24-6E3/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 SMDA24-6E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMDA24-6E3/TR13?
All SMDA24-6E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA24-6E3/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 SMDA24-6E3/TR13 part is unused and in its original packaging.
Return procedure for SMDA24-6E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA24-6E3/TR13 Tags
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