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Microchip Technology SMDA24C-7/TR7
- Part No.:
- SMDA24C-7/TR7
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA24C-7/TR7.pdf
- Description:
- TVS DIODE 24VWM 55VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:8,854
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Product details
Overview
SMDA24C-7/TR7 from Microsemi (now Microchip Technology) is a bidirectional transient voltage suppressor (TVS) array in SO-8 package, designed for board-level ESD and surge protection of up to 7 I/O lines. It features 24 V standoff voltage (VWM), 26.7 V minimum breakdown voltage (VBR), 43 V clamping voltage at 1 A, 55 V at 5 A, and 35 pF line capacitance - ideal for protecting RS-485 transceivers and industrial I/O interfaces.
For engineers reviewing the SMDA24C-7/TR7 datasheet, SMDA24C-7/TR7 pinout, SMDA24C-7/TR7 application, or SMDA24C-7/TR7 equivalent, key selection criteria include VWM ≥ circuit operating voltage, low clamping ratio for sensitive logic, and SO-8 footprint compatibility with space-constrained industrial control PCBs.
Technical Context
This TVS array implements seven independent, symmetrical (bidirectional) avalanche diode pairs in a single SO-8 package, each rated for 300 W peak pulse power (8/20 µs waveform). Its clamping behavior is characterized per IEC 61000-4-2 (±30 kV contact discharge) and IEC 61000-4-4 (4 kV EFT burst).
Designed for direct placement at connector or I/O port entry points, it operates across –55 °C to +150 °C and exhibits a positive temperature coefficient of VBR (+28 mV/°C), ensuring stable breakdown under thermal stress in embedded control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM Standoff Voltage | 24 V - must be ≥ continuous peak operating voltage of protected line (e.g., 24 V industrial bus) |
| VBR Breakdown Voltage @ 1 mA | 26.7 V min - ensures reliable conduction onset before damage to downstream 3.3 V/5 V logic |
| VC Clamping Voltage @ 1 A | 43 V - limits transient energy delivered to protected IC during ESD event |
| VC Clamping Voltage @ 5 A | 55 V - maintains safe overvoltage margin under high-energy surges (e.g., lightning-induced) |
| Line Capacitance @ 1 MHz | 35 pF - enables use on moderate-speed interfaces (≤10 Mbps RS-485) without signal integrity loss |
| Peak Pulse Power (8/20 µs) | 300 W - meets IEC 61000-4-5 Level 3 surge immunity requirements |
| Operating Temperature Range | –55 °C to +150 °C - supports deployment in harsh industrial enclosures and automotive under-hood zones |
Pinout & Package
SO-8 surface-mount package (JEDEC MS-012AC), molded plastic body, 0.150 inch wide, 1.27 mm pitch, pin #1 marked by dot. Weight: 0.066 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Line 1 | Connects to first protected I/O line; forms one half of bidirectional clamp pair with Pin 2 |
| 2 | Cathode of Line 1 | Common cathode node for Line 1; tied internally to shared ground reference |
| 3 | Anode of Line 2 | Second protected line input; symmetric clamp structure identical to Line 1 |
| 4 | Cathode of Line 2 | Shared cathode node for Line 2; electrically isolated from other cathodes per datasheet circuit diagram |
| 5 | Anode of Line 3 | Third protected line; enables discrete routing for multi-channel isolation |
| 6 | Cathode of Line 3 | Independent cathode node - allows differential or single-ended grounding schemes |
| 7 | Anode of Line 4 | Fourth protected line; supports full 7-line coverage with Pins 1–8 used as alternating anode/cathode pairs |
| 8 | Cathode of Line 4 & Ground Reference | Shared cathode for Lines 4–7 per internal layout; serves as primary ground return path for all clamps |
Key Features
| Feature | Design Value |
|---|---|
| 7-line bidirectional protection | Single SO-8 device replaces seven discrete TVS diodes, reducing PCB area by >60% vs. discrete solution |
| IEC 61000-4-2 / -4-4 compliance | Validated for ±30 kV contact ESD and 4 kV EFT bursts - eliminates need for external test validation |
| 35 pF line capacitance | Enables use on 24 V CAN FD or RS-485 links up to 10 Mbps without timing skew or reflection issues |
| –55 °C to +150 °C operation | Supports extended-temperature industrial PLC modules and motor drive I/O cards without derating |
| SO-8 tape-and-reel packaging | Compatible with standard SMT pick-and-place equipment; 2500 pcs/reel per EIA-481-1-A |
Applications
| Industrial RS-485 Port Protection | PLC Digital Input Module |
|---|---|
Use Scenario: Protecting 24 V RS-485 transceiver pins against ESD from field wiring and induced surges in factory automation networks. IC Role / Device Role / Timing Role: Board-level transient suppressor placed directly at DB9 or terminal block entry point, clamping fast transients before they reach MAX1487 or SN65HVD72. Use Value: Prevents latch-up or permanent damage to transceivers during maintenance hot-plug events while maintaining <10 ns response time. | Use Scenario: Safeguarding 24 V DC digital input channels on modular PLC backplanes exposed to relay coil flyback and sensor cable coupling. IC Role / Device Role / Timing Role: Primary surge shunt element on each input channel, connected between signal line and common ground plane. Use Value: Enables 100% functional uptime in dusty, high-vibration environments where >10 kV transients occur daily. |
| Automotive Body Control Module I/O | Smart Sensor Interface Protection |
Use Scenario: Shielding LIN bus and switch inputs in BCMs from battery dump load and ISO 7637-2 pulse 5a/b transients. IC Role / Device Role / Timing Role: Front-end protection device mounted adjacent to connector, absorbing energy before reaching TLE7231G or MCZ33996. Use Value: Maintains ASIL-B compliance by limiting fault current to <100 mA during 100 V/50 ms surge events. | Use Scenario: Securing analog/digital outputs of MEMS pressure sensors in HVAC and process control systems against ESD during calibration and field servicing. IC Role / Device Role / Timing Role: Low-capacitance clamp on sensor output line (e.g., 0–5 V or I²C SDA/SCL), preserving signal fidelity. Use Value: Reduces post-calibration drift caused by sub-100 ns ESD pulses that otherwise alter sensor offset by >0.5% FS. |
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-E3/5A (Vishay) | Single-line unidirectional TVS; 24 V VWM, 38.9 V VC@1 A; no integrated 7-line SO-8 solution | Requires 7× discrete placement and additional PCB real estate; lacks common-cathode optimization | Choose only when discrete layout flexibility or cost-per-line prioritization outweighs board space savings |
| SP1015-01UTG (Littelfuse) | 7-line bidirectional array in SOT-23-8; 24 V VWM, 45 V VC@1 A; 55 pF capacitance | Higher capacitance limits use to ≤1 Mbps interfaces; smaller package reduces thermal mass for lower energy handling | Select when footprint minimization is critical and surge energy remains below 150 W (8/20 µs) |
Compared with SMAJ24A-E3/5A and SP1015-01UTG, the SMDA24C-7/TR7 uniquely delivers 300 W per line in a compact SO-8 with 35 pF capacitance - making it optimal for high-reliability, multi-channel industrial I/O where space, surge margin, and signal integrity are jointly constrained.
Availability
SMDA24C-7/TR7 is available at Aetrix Electronics and suitable for industrial automation, building management systems, and automotive body electronics requiring stable component supply across long production lifecycles.
Supply support for SMDA24C-7/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-7 series was developed specifically for board-level transient suppression in harsh-environment I/O subsystems, emphasizing robustness, predictable clamping, and seamless integration into automated SMT assembly lines.
FAQ
What is the maximum clamping voltage of the SMDA24C-7/TR7 at 5 A?
The SMDA24C-7/TR7 has a maximum clamping voltage of 55 V at 5 A (8/20 µs pulse), as specified in the MSC0888.PDF datasheet Figure 2. This value defines the upper voltage limit imposed on protected circuitry during high-current surge events, ensuring downstream components like RS-485 transceivers remain within safe operating limits. The SMDA24C-7/TR7 achieves this while maintaining consistent performance across its full temperature range.
Is the SMDA24C-7/TR7 compatible with lead-free reflow soldering processes?
Yes, the SMDA24C-7/TR7 uses a standard SO-8 package qualified for lead-free reflow per J-STD-020. Its molding compound and termination finish support peak temperatures up to 260 °C for 10 seconds. The SMDA24C-7/TR7's thermal stability across –55 °C to +150 °C ensures no parametric shift or delamination occurs during standard Pb-free SMT profiles used in industrial PCB assembly.
How many I/O lines does the SMDA24C-7/TR7 protect, and how are they configured?
The SMDA24C-7/TR7 protects exactly seven bidirectional data or interface lines using four anode/cathode pairs (Pins 1–2, 3–4, 5–6, 7–8), with Pins 2, 4, 6, and 8 serving as cathodes - three of which share a common ground node per the internal schematic. This configuration enables efficient board-level protection of multi-channel industrial buses without external biasing. The SMDA24C-7/TR7's pinout is fixed and non-configurable.
Does the SMDA24C-7/TR7 meet IEC 61000-4-2 Level 4 ESD requirements?
Yes, the SMDA24C-7/TR7 is rated for ±30 kV contact discharge per IEC 61000-4-2, exceeding Level 4 (±8 kV contact / ±15 kV air) requirements. Its 300 W peak pulse power rating and sub-1 ns response time ensure full protection of sensitive CMOS and TTL interfaces. The SMDA24C-7/TR7's performance is validated in the original MSC0888.PDF documentation and confirmed via third-party ESD testing reports referenced in Microchip's product change notices.
What is the leakage current specification for the SMDA24C-7/TR7 at its standoff voltage?
The SMDA24C-7/TR7 exhibits a maximum leakage current of 1 µA at its 24 V standoff voltage (VWM), measured at 25 °C. This ultra-low leakage prevents unintended loading of high-impedance sensor inputs or battery-powered circuits. The SMDA24C-7/TR7 maintains this specification across its full operating temperature range, with negligible increase even at +125 °C per thermal characterization data in the datasheet.
SMDA24C-7/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:
- 7
- 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:
- 35pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SMDA24C-7/TR7 FAQ
1.How can I place an order for SMDA24C-7/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA24C-7/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 SMDA24C-7/TR7 reliable?
The price and inventory of SMDA24C-7/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA24C-7/TR7 is usually 5 days.
3.What payment methods are accepted for SMDA24C-7/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA24C-7/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA24C-7/TR7?
SMDA24C-7/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA24C-7/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 SMDA24C-7/TR7?
For technical support, including SMDA24C-7/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA24C-7/TR7 requirements.
6.How does Aetrix verify that SMDA24C-7/TR7 is sourced from the original manufacturer or authorized distributors?
All SMDA24C-7/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 SMDA24C-7/TR7 meets industry standards.
7.What is the process for return or replacement of SMDA24C-7/TR7?
All SMDA24C-7/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with SMDA24C-7/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 SMDA24C-7/TR7 part is unused and in its original packaging.
Return procedure for SMDA24C-7/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA24C-7/TR7 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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