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Microchip Technology SMDA15C-5E3/TR7
- Part No.:
- SMDA15C-5E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA15C-5E3/TR7.pdf
- Description:
- TVS DIODE 15VWM 30VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:7,234
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Product details
Overview
SMDA15C-5E3/TR7 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 five I/O lines in board-level ESD/EFT-sensitive applications such as RS-485 transceivers and USB interface circuits.
For engineers reviewing the SMDA15C-5E3/TR7 datasheet, SMDA15C-5E3/TR7 pinout, SMDA15C-5E3/TR7 application, or SMDA15C-5E3/TR7 equivalent, key selection criteria include VWM ≥ circuit operating voltage, clamping performance under 1–5 A surge current, SO-8 footprint compatibility, and IEC 61000-4-2/4-4 compliance for industrial interface protection.
Technical Context
This TVS array employs silicon avalanche diode technology to provide fast-response (sub-nanosecond) clamping across five bidirectional channels, each sharing a common GND terminal. Its breakdown voltage is 16.7 V (min) at 1 mA, with leakage current ≤1 µA at 15 V standoff.
The device operates from –55 °C to +150 °C and maintains stable clamping up to 30 V at 5 A (8/20 µs), enabling robust protection for TTL, CMOS, and HCMOS logic interfaces without signal distortion or DC loading in normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 15 V - Maximum continuous working voltage before conduction; must exceed circuit's peak operating voltage. |
| Breakdown Voltage (VBR) | 16.7 V (min) @ 1 mA - Threshold where avalanche conduction begins; ensures reliable triggering during transients. |
| Clamping Voltage (VC) | 24 V @ 1 A - Maximum voltage seen by protected line during 8/20 µs surge; limits stress on downstream ICs. |
| Peak Pulse Power | 300 W @ 8/20 µs - Sustains high-energy surges without failure; validated per IEC 61000-4-5 waveform. |
| Leakage Current (ID) | ≤1 µA @ VWM - Negligible DC loading on signal lines; preserves signal integrity in high-impedance interfaces. |
| Capacitance (C) | 50 pF @ 0 V, 1 MHz - Low enough for <100 Mbps data lines (e.g., RS-485, CAN); avoids signal rise-time degradation. |
| Operating Temperature | –55 °C to +150 °C - Supports deployment in automotive engine control units and industrial PLCs without derating. |
Pinout & Package
SO-8 surface-mount package with gull-wing leads, 1.27 mm pitch, and pin #1 identified by dot marking. Total weight ≈ 0.066 g. Tape-and-reel packaging per EIA-481-1-A (2500 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Channel 1 | Bidirectional protection path for Line 1; connects to I/O trace requiring ESD suppression. |
| 2 | Anode of Channel 2 | Bidirectional protection path for Line 2; electrically isolated from other channels except shared GND. |
| 3 | Anode of Channel 3 | Bidirectional protection path for Line 3; enables independent surge handling per line. |
| 4 | Anode of Channel 4 | Bidirectional protection path for Line 4; supports multi-line interface protection without cross-talk. |
| 5 | GND | Common cathode return for all five channels; must be low-inductance connection to system ground plane. |
| 6 | Anode of Channel 5 | Bidirectional protection path for Line 5; completes full 5-line protection set. |
| 7 | No Connect | Internally unconnected; no PCB trace or component should attach to Pin 7. |
| 8 | No Connect | Internally unconnected; left floating per design; not used for thermal or electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| 5-channel bidirectional protection | Enables single-device safeguarding of multi-line interfaces (e.g., UART, SPI, RS-485) without discrete diode arrays. |
| IEC 61000-4-2 Level 4 compliant | Withstands ±15 kV contact / ±20 kV air discharge, meeting industrial and medical ESD immunity requirements. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage exposure during transients-critical for 3.3 V and 5 V logic interfacing. |
| SO-8 footprint compatibility | Direct replacement for legacy SO-8 TVS arrays; uses standard reflow profiles and automated placement equipment. |
| High-temperature operation | Rated to +150 °C junction temperature-suitable for under-hood automotive and motor drive control modules. |
Applications
| Industrial RS-485 Networks | Automotive Body Control Modules |
|---|---|
Use Scenario: Protecting differential bus lines in factory automation PLCs exposed to cable-induced EFT and lightning-induced surges. IC Role / Device Role: Board-level transient suppressor placed at connector entry point, shunting surge energy to chassis ground before reaching transceiver IC. Use Value: Maintains 24 V clamping at 1 A ensures MAX1487-level transceivers remain within safe operating area during 4 kV EFT bursts. | Use Scenario: Safeguarding LIN bus and sensor I/O lines in door module ECUs subject to assembly-line ESD and load-dump coupling. IC Role / Device Role: Five-line TVS array protecting mixed-signal inputs (switches, sensors, actuators) sharing common ground reference. Use Value: 50 pF capacitance prevents timing skew on 20 kbps LIN signals; –55 °C to +150 °C rating supports under-dash mounting. |
| Medical Patient Monitoring Ports | Point-of-Sale Terminal Interfaces |
Use Scenario: Shielding USB and serial diagnostic ports on bedside monitors from operator-handling ESD per IEC 60601-1-2. IC Role / Device Role: First-stage protection at external connector, reducing transient amplitude before secondary filtering and isolation stages. Use Value: 15 V VWM matches 12 V supply rails in isolated USB PHY sections; ≤1 µA leakage avoids bias errors in analog front-end references. | Use Scenario: Securing RS-232 and GPIO lines in retail kiosks deployed in dry, static-prone environments. IC Role / Device Role: Compact SO-8 solution for space-constrained mainboard layouts where discrete TVS diodes would increase BOM count and layout complexity. Use Value: Single-device 5-line protection reduces PCB area by >40% vs. five 0805 TVS diodes; tape-and-reel delivery supports high-volume SMT production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMDA12C-5 | Lower VWM (12 V), lower VC (19 V @ 1 A), higher capacitance (75 pF) | Better suited for 12 V nominal systems; may overclamp in 15 V rail applications | Select only if protected circuit's max continuous voltage is ≤12 V and bandwidth allows 75 pF loading. |
| SMDA24C-5 | Higher VWM (24 V), higher VC (43 V @ 1 A), lower capacitance (35 pF) | Required for 24 V industrial buses; insufficient clamping margin for 15 V logic interfaces | Choose when protecting 24 V CAN or Profibus lines where 43 V clamping remains within IC absolute maximum ratings. |
Compared with SMDA12C-5 and SMDA24C-5, the SMDA15C-5E3/TR7 provides optimal clamping margin and capacitance trade-off for 15 V nominal interfaces-ensuring both robust surge suppression and signal fidelity in mixed-voltage industrial I/O designs.
Availability
SMDA15C-5E3/TR7 is available at Aetrix Electronics and suitable for industrial communications, automotive body electronics, and medical device interfaces requiring stable component supply and long-term obsolescence management.
Supply support for SMDA15C-5E3/TR7 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-5 series was developed specifically for board-level ESD/EFT protection of multi-line digital interfaces, emphasizing low clamping voltage, tight parameter distribution, and extended temperature capability for harsh-environment deployments.
FAQ
What is the standoff voltage rating of the SMDA15C-5E3/TR7?
The SMDA15C-5E3/TR7 has a standoff voltage (VWM) of 15 V, meaning it remains non-conductive up to this DC or continuous peak AC voltage. This rating ensures compatibility with 15 V nominal circuits while providing sufficient margin above typical operating voltages to avoid false triggering during normal operation.
Does the SMDA15C-5E3/TR7 meet IEC 61000-4-2 and IEC 61000-4-4 standards?
Yes, the SMDA15C-5E3/TR7 is explicitly designed and tested to meet IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) requirements. Its 300 W peak pulse power rating and sub-nanosecond response time enable compliance with Level 4 ESD (±15 kV contact) and 4 kV EFT burst immunity in end-equipment testing.
How many signal lines does the SMDA15C-5E3/TR7 protect?
The SMDA15C-5E3/TR7 protects exactly five bidirectional signal lines using a single SO-8 package. Pins 1–4 and 6 serve as anodes for Channels 1–5 respectively, with Pin 5 as the common cathode (GND). Pins 7 and 8 are no-connect and must remain unattached in layout.
What is the clamping voltage of the SMDA15C-5E3/TR7 at 5 A surge current?
The clamping voltage of the SMDA15C-5E3/TR7 is 30 V at 5 A (8/20 µs waveform), as specified in the MSC0331A.PDF datasheet. This value defines the maximum voltage imposed on protected lines during high-current transients, ensuring downstream ICs like RS-485 transceivers remain within their absolute maximum ratings.
Is the SMDA15C-5E3/TR7 compatible with lead-free reflow soldering processes?
Yes, the SMDA15C-5E3/TR7 is qualified for lead-free reflow soldering per J-STD-020. Its SO-8 package supports standard Pb-free thermal profiles (peak temperature up to 260 °C), and the device's –55 °C to +150 °C operating range ensures reliability after multiple reflow cycles without parametric shift or bond-wire degradation.
SMDA15C-5E3/TR7 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:
- 5
- 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:
- 50pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SMDA15C-5E3/TR7 FAQ
1.How can I place an order for SMDA15C-5E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA15C-5E3/TR7 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-5E3/TR7 reliable?
The price and inventory of SMDA15C-5E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA15C-5E3/TR7 is usually 5 days.
3.What payment methods are accepted for SMDA15C-5E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA15C-5E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA15C-5E3/TR7?
SMDA15C-5E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA15C-5E3/TR7 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-5E3/TR7?
For technical support, including SMDA15C-5E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA15C-5E3/TR7 requirements.
6.How does Aetrix verify that SMDA15C-5E3/TR7 is sourced from the original manufacturer or authorized distributors?
All SMDA15C-5E3/TR7 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-5E3/TR7 meets industry standards.
7.What is the process for return or replacement of SMDA15C-5E3/TR7?
All SMDA15C-5E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA15C-5E3/TR7, 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-5E3/TR7 part is unused and in its original packaging.
Return procedure for SMDA15C-5E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA15C-5E3/TR7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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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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