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Microchip Technology SMDA15C-4E3/TR13
- Part No.:
- SMDA15C-4E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA15C-4E3/TR13.pdf
- Description:
- TVS DIODE 15VWM 30VC 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,485
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Product details
Overview
SMDA15C-4E3/TR13 from Microsemi (now Microchip Technology) is a bidirectional transient voltage suppressor (TVS) array in SO-8 package, rated for 300 W peak pulse power (8/20 µs), 15 V standoff voltage (VWM), and clamping voltage of 24 V at 1 A. It protects four 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 SMDA15C-4E3/TR13 datasheet, SMDA15C-4E3/TR13 pinout, SMDA15C-4E3/TR13 application, or SMDA15C-4E3/TR13 equivalent, key selection criteria include VWM ≥ 15 V, bidirectional line protection, SO-8 footprint compatibility, and sub-150 pF line capacitance for high-speed data integrity.
Technical Context
This TVS array employs silicon avalanche diode technology with symmetrical bidirectional breakdown per channel, enabling clamping on both positive and negative transients without polarity constraints. Each of its four protected lines exhibits identical electrical characteristics: VBR min = 16.7 V, VC = 24 V @ 1 A, and leakage <1 µA at 15 V.
The device operates across –55 °C to +150 °C and is optimized for board-level surge suppression at signal interfaces - not power rails - with low clamping voltage ensuring downstream ICs (e.g., RS-485 transceivers, USB PHYs) remain within safe operating limits during fast-rising transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 15 V - Maximum continuous DC or RMS operating voltage the protected line may sustain without triggering conduction |
| Breakdown Voltage (VBR) | 16.7 V min @ 1 mA - Guaranteed avalanche onset threshold ensures reliable turn-on before sensitive logic thresholds are exceeded |
| Clamping Voltage (VC) | 24 V @ 1 A - Limits transient voltage seen by downstream circuitry during 8/20 µs surge, preserving TTL/CMOS I/O integrity |
| Peak Pulse Power | 300 W @ 8/20 µs - Sustains standardized lightning-surge energy without degradation under single-event stress |
| Line Capacitance | 140 pF @ 1 MHz, 0 V - Low enough to avoid signal integrity loss on ≤10 Mbps digital interfaces (e.g., RS-232, CAN) |
| Operating Temperature | –55 °C to +150 °C - Validated for under-hood automotive, industrial control, and base station environments |
Pinout & Package
SO-8 surface-mount package (JEDEC MS-012AC), molded plastic body, 0.150-inch width, 1.27 mm pitch, pin #1 marked by dot. Weight: 0.066 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7 | Input/Output Line Terminal (Bidirectional) | Each connects to one protected data line (e.g., RS-485 A/B, USB D+/D–); symmetric structure enables ± transient suppression |
| 2, 4, 6, 8 | Common Cathode Bus | Internally tied cathodes provide shared return path for all four channels; must be connected to system ground plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 4-channel bidirectional protection | Single SO-8 package replaces four discrete TVS diodes, reducing PCB area and assembly cost while ensuring matched response |
| IEC 61000-4-2 Level 4 compliant | Withstands ±15 kV contact / ±20 kV air discharge without parametric shift or failure - validated per standard test waveform |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage stress on protected ICs compared to higher-ratio alternatives, improving system robustness margin |
| 140 pF line-to-ground capacitance | Preserves rise/fall times on moderate-speed serial buses (e.g., UART, SPI, I²C) without requiring impedance re-tuning |
Applications
| Industrial RS-485 Networks | Automotive Body Control Modules |
|---|---|
Use Scenario: Protecting half-duplex RS-485 transceivers in factory automation PLCs exposed to cable-coupled EFT and ground-loop surges. IC Role / Device Role / Timing Role: Board-level transient suppressor placed directly at connector entry point, clamping line-to-ground surges before reaching MAX485/MAX1487. Use Value: Prevents latch-up or permanent damage to transceiver inputs while maintaining <10 ns added propagation delay due to low capacitance. | Use Scenario: Safeguarding LIN bus I/O pins in door module ECUs subjected to ESD events during assembly and service. IC Role / Device Role / Timing Role: Bidirectional TVS array absorbing ±8 kV contact ESD per ISO 10605, placed adjacent to connector pins. Use Value: Ensures compliance with automotive EMC requirements without degrading 19.2 kbps LIN timing margins or requiring additional filtering. |
| Point-of-Sale Peripheral Interfaces | Medical Patient Monitor Data Ports |
Use Scenario: Shielding USB 2.0 upstream ports on kiosk controllers from user-hand ESD and induced surges on unshielded cables. IC Role / Device Role / Timing Role: Four-line TVS protecting D+, D–, VBUS, and ID lines - VBUS line uses same clamping profile as signal lines for simplified layout. Use Value: Maintains full-speed USB signaling integrity (480 Mbps) with <140 pF loading and avoids false disconnect events caused by transient-induced resets. | Use Scenario: Securing isolated analog/digital I/O on bedside monitors connected to external sensors via long leads susceptible to EFT coupling. IC Role / Device Role / Timing Role: Transient suppressor on patient-connected sensor interface lines (e.g., SpO₂, ECG leads), referenced to isolated ground. Use Value: Meets IEC 60601-1-2 3rd ed. immunity requirements for applied parts while avoiding signal distortion in sub-mV biopotential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMDA15C-4/TR7 | Identical electrical specs and SO-8 package; differs only in tape-and-reel quantity (750 pcs vs. 2,500 pcs) | No functional difference; suited for low-volume prototyping or short-run production | Select SMDA15C-4/TR7 when smaller reel size aligns with SMT line changeover frequency or inventory turnover targets |
| SMLJ15CA | Discrete bidirectional TVS (DO-214AB), 15 V VWM, 24.4 V VC @ 1 A, but single-channel; requires 4 devices for same coverage | Higher PCB area, more placement steps, no inherent channel matching; better for space-constrained layouts where SO-8 is unavailable | Choose SMLJ15CA only if SO-8 footprint is incompatible or discrete routing is required for thermal isolation |
Compared with SMDA15C-4/TR7, the SMDA15C-4E3/TR13 offers identical protection performance with optimized logistics for high-volume manufacturing; versus SMLJ15CA, it delivers integrated 4-line coordination, reduced assembly cost, and guaranteed parameter matching across channels - critical for differential bus reliability.
Availability
SMDA15C-4E3/TR13 is available at Aetrix Electronics and suitable for industrial communication interfaces, automotive body electronics, medical I/O protection, and point-of-sale peripheral designs requiring stable component supply and long-term lifecycle assurance.
Supply support for SMDA15C-4E3/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 SMDAxxC-4 series was developed specifically for compact, multi-line board-level ESD/EFT protection in space-constrained embedded systems - emphasizing low capacitance, tight parameter matching, and extended temperature operation.
FAQ
What is the maximum clamping voltage of the SMDA15C-4E3/TR13 at 5 A?
The SMDA15C-4E3/TR13 has a maximum clamping voltage of 30 V at 5 A (8/20 µs waveform), as specified in the MSC0886.PDF datasheet. This value ensures downstream circuitry remains within safe voltage limits during higher-energy transients, such as those induced by nearby lightning strikes or heavy-industrial switching noise. The SMDA15C-4E3/TR13 maintains this clamping performance across its full operating temperature range.
Is the SMDA15C-4E3/TR13 compatible with lead-free reflow soldering processes?
Yes, the SMDA15C-4E3/TR13 is qualified for lead-free reflow soldering per JEDEC J-STD-020. Its SO-8 package withstands peak temperatures up to 260 °C for 10 seconds. The device's internal construction and molding compound are fully compatible with standard Pb-free thermal profiles, and no special pre-bake or handling is required prior to assembly. The SMDA15C-4E3/TR13 meets RoHS Directive 2011/65/EU requirements.
Does the SMDA15C-4E3/TR13 require an external current-limiting resistor?
No, the SMDA15C-4E3/TR13 does not require an external current-limiting resistor. It is designed for direct connection between protected line and ground, relying on its intrinsic dynamic resistance to limit let-through current during clamping. Adding a series resistor would increase total clamping voltage (VC + I × R) and degrade protection effectiveness. The SMDA15C-4E3/TR13 achieves optimal performance with low-inductance ground routing only.
Can the SMDA15C-4E3/TR13 protect AC signal lines such as telephone or DSL interfaces?
The SMDA15C-4E3/TR13 is rated for DC and low-frequency AC signals only; its 15 V standoff voltage makes it unsuitable for AC-coupled telecom lines with peak voltages exceeding 15 V (e.g., POTS ringing at ±90 V). For such applications, higher-VWM arrays like SMDA24C-4 or dedicated AC-rated TVS solutions are required. The SMDA15C-4E3/TR13 is intended for DC-biased digital or analog I/O with nominal voltages ≤15 V.
How is pin 1 identified on the SMDA15C-4E3/TR13 SO-8 package?
Pin 1 of the SMDA15C-4E3/TR13 is identified by a small molded dot located on the top surface of the SO-8 package, adjacent to the lead edge. This marking conforms to JEDEC standard SO-8 orientation and is visible under standard optical inspection. Correct pin 1 alignment is essential to ensure proper channel assignment - pins 1, 3, 5, and 7 are the protected line terminals, while pins 2, 4, 6, and 8 connect to the common cathode bus. The SMDA15C-4E3/TR13 datasheet (MSC0886.PDF) confirms this marking scheme in the mechanical drawings section.
SMDA15C-4E3/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:
- 4
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 30V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 140pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SMDA15C-4E3/TR13 FAQ
1.How can I place an order for SMDA15C-4E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA15C-4E3/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 SMDA15C-4E3/TR13 reliable?
The price and inventory of SMDA15C-4E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA15C-4E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMDA15C-4E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA15C-4E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA15C-4E3/TR13?
SMDA15C-4E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA15C-4E3/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 SMDA15C-4E3/TR13?
For technical support, including SMDA15C-4E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA15C-4E3/TR13 requirements.
6.How does Aetrix verify that SMDA15C-4E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMDA15C-4E3/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 SMDA15C-4E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMDA15C-4E3/TR13?
All SMDA15C-4E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA15C-4E3/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 SMDA15C-4E3/TR13 part is unused and in its original packaging.
Return procedure for SMDA15C-4E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA15C-4E3/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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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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Diodes Incorporated
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