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Vishay General Semiconductor - Diodes Division 1.5SMC18CA-M3/9AT
- Part No.:
- 1.5SMC18CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18CA-M3/9AT.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,828
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Product details
Overview
1.5SMC18CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 1500 W peak pulse power rating (10/1000 μs), 18 V breakdown voltage (VBR = 17.1–18.9 V at IT = 1.0 mA), and clamps transients to ≤25.2 V at 59.5 A, making it suitable for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the 1.5SMC18CA-M3/9AT datasheet, 1.5SMC18CA-M3/9AT pinout, 1.5SMC18CA-M3/9AT application, or 1.5SMC18CA-M3/9AT equivalent, this device delivers verified bidirectional clamping performance, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness - critical for automotive-grade ESD and surge resilience in harsh environments.
Technical Context
The 1.5SMC18CA-M3/9AT operates as a symmetrical avalanche diode with identical forward and reverse breakdown characteristics, enabling bidirectional transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM = 15.3 V).
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C. The device sustains repetitive 10/1000 μs surges at 0.01% duty cycle and meets J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - withstands high-energy lightning-induced surges per IEC 61000-4-5 Level 4 |
| Breakdown Voltage VBR | 17.1–18.9 V at 1.0 mA - defines precise clamping onset for 12 V system protection |
| Stand-off Voltage VWM | 15.3 V - ensures no conduction during normal 12 V rail operation |
| Maximum Clamping Voltage VC | 25.2 V at 59.5 A - limits downstream IC stress to safe levels under surge |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount footprint with 8.0 mm × 8.0 mm copper pad thermal relief |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| RoHS Compliance | M3 suffix - halogen-free, RoHS-compliant, and qualified per JESD201 Class 2 whisker resistance |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking required; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional current path | Either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or floating DC lines |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics |
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking - reduces manufacturing overhead and handling risk |
| Halogen-free (M3) | Meets strict environmental regulations including JEDEC J-STD-609A Class 1 and automotive OEM material declarations |
| AEC-Q101 qualification option | Supports drop-in qualification path via HM3 suffix variants - accelerates automotive design-in |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed at connector interface to shunt transients before reaching signal conditioning circuitry. Use Value: Limits induced voltage to ≤25.2 V during 59.5 A surges, preserving signal integrity and preventing latch-up in 3.3 V/5 V microcontrollers. |
Use Scenario: Safeguarding 24 V digital input modules against field-wiring faults, relay coil flyback, and electrostatic discharge in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or optocoupler input lines, operating in parallel with upstream filtering. Use Value: Absorbs 1500 W surge energy without degradation, maintaining >100 k-cycle reliability under repetitive switching stress. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-level surge protection on Ethernet PHY power rails and RS-485 data lines exposed to building-wide lightning coupling. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) voltage clamp that activates before MOVs or GDTs, reducing let-through energy. Use Value: Clamps within 1 ns to <25.2 V, minimizing stress on isolated DC/DC converters and PHY ICs rated for 36 V max input. |
Use Scenario: Input-stage transient suppression on universal-input (90–264 VAC) AC-DC adapters for smart home devices. IC Role / Device Role / Timing Role: Standoff-rated (15.3 V) bidirectional suppressor placed after bridge rectifier to protect primary-side controllers. Use Value: Maintains <1.0 μA leakage at 15.3 V, eliminating standby power penalty while delivering full 1500 W surge capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Lower peak power (600 W), same VBR range and SMC-compatible SMB (DO-214AA) package | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy surges | Select when board space allows smaller SMB footprint and surge requirements are ≤600 W |
| 1.5KE18CA | Through-hole TO-204AE (DO-201AE) package, identical 1500 W rating and VBR, but higher RθJA (100 °C/W) | Requires wave soldering or hand assembly; unsuitable for fully SMT production | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ18CA and 1.5KE18CA, the 1.5SMC18CA-M3/9AT uniquely combines 1500 W surge capacity, SMC surface-mount compatibility, halogen-free construction, and AEC-Q101 qualification pathway - making it the optimal choice for high-reliability, automated-manufacturing automotive and industrial applications.
Availability
1.5SMC18CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply, consistent M3-grade environmental compliance, and traceable lot-level quality control.
Supply support for 1.5SMC18CA-M3/9AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - emphasizing robust clamping, thermal stability, and automotive-grade process consistency.
FAQ
What is the clamping voltage of the 1.5SMC18CA-M3/9AT at its rated peak pulse current?
The 1.5SMC18CA-M3/9AT clamps to a maximum of 25.2 V at its rated peak pulse current of 59.5 A (10/1000 μs waveform). This value is measured under standardized test conditions with 0.31" × 0.31" copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC18CA-M3/9AT maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC18CA-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC18CA-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified 1.5SMC family. While the base 1.5SMC18CA-M3/9AT itself carries the commercial-grade M3 suffix, Vishay offers the HM3 variant (e.g., 1.5SMC18CAHM3_A/I) with full AEC-Q101 qualification. The 1.5SMC18CA-M3/9AT shares identical electrical and thermal specs, enabling direct qualification migration.
What does the "CA" suffix indicate in 1.5SMC18CA-M3/9AT?
The "CA" suffix in 1.5SMC18CA-M3/9AT denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping behavior in forward and reverse directions. This eliminates polarity concerns during PCB layout and simplifies protection of AC-coupled or floating signal lines. Unidirectional variants use "A" only (e.g., 1.5SMC18A).
What is the standoff voltage (VWM) of the 1.5SMC18CA-M3/9AT, and why does it matter?
The standoff voltage VWM of the 1.5SMC18CA-M3/9AT is 15.3 V - the maximum continuous reverse voltage at which leakage remains ≤1.0 μA. This value ensures the 1.5SMC18CA-M3/9AT remains non-conductive during normal operation of 12 V automotive or industrial systems, preventing power loss or false triggering while still activating promptly during overvoltage events exceeding 17.1 V.
How does the SMC (DO-214AB) package of the 1.5SMC18CA-M3/9AT compare thermally to smaller packages like SMB?
The SMC (DO-214AB) package used by the 1.5SMC18CA-M3/9AT delivers superior thermal performance versus SMB (DO-214AA): its RθJA is 75 °C/W (vs. ~100 °C/W for SMBJ), enabling higher sustained power dissipation and improved reliability under repeated surge stress. The larger copper pad area (0.31" × 0.31") specified for the 1.5SMC18CA-M3/9AT directly supports its 1500 W rating and makes it preferred for high-energy protection where thermal margin is critical.
1.5SMC18CA-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC18CA-M3/9AT FAQ
1.How can I place an order for 1.5SMC18CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18CA-M3/9AT 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 1.5SMC18CA-M3/9AT reliable?
The price and inventory of 1.5SMC18CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC18CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC18CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18CA-M3/9AT?
1.5SMC18CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18CA-M3/9AT 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 1.5SMC18CA-M3/9AT?
For technical support, including 1.5SMC18CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC18CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18CA-M3/9AT 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 1.5SMC18CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC18CA-M3/9AT?
All 1.5SMC18CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18CA-M3/9AT, 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 1.5SMC18CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC18CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18CA-M3/9AT Tags
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Diodes Incorporated
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