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Vishay General Semiconductor - Diodes Division 1.5SMC18CA-E3/9AT
- Part No.:
- 1.5SMC18CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18CA-E3/9AT.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,894
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Product details
Overview
1.5SMC18CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 1500 W peak pulse power rating (10/1000 μs), 18 V breakdown voltage (VBR min/max = 17.1–18.9 V at 1 mA), and clamps to ≤25.2 V at 59.5 A peak pulse current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC18CA-E3/9AT datasheet, 1.5SMC18CA-E3/9AT pinout, 1.5SMC18CA-E3/9AT application, or 1.5SMC18CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge handling, RoHS-compliant E3 termination, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification readiness via HE3 variant.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at 15.3 V stand-off), while the low incremental surge resistance enables fast, predictable clamping during transient events.
The device is rated for repetitive 10/1000 μs surges at 0.01% duty cycle and derates linearly above 25 °C ambient, supported by RθJA = 75 °C/W and RθJL = 15 °C/W thermal resistances. It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1 mA - defines precise voltage threshold where clamping initiates under controlled test conditions |
| VWM | 15.3 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during full 1500 W transient, critical for downstream IC survivability |
| PPPM | 1500 W (10/1000 μs) - peak surge energy absorption capacity without failure |
| IPPM | 59.5 A - maximum non-repetitive surge current the device safely conducts |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal performance |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Bidirectional symmetry means this terminal functions identically as cathode in reverse polarity - no polarity marking required |
| Cathode | Current exit terminal in forward bias | Functionally identical to Anode under reverse bias; terminals are interchangeable in circuit layout due to bidirectional design |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against lightning-induced surges (IEC 61000-4-5 Level 4) and inductive switching spikes in 24 V systems |
| Low clamping voltage ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on protected ICs - e.g., 25.2 V clamp limits exposure of 24 V logic rails during transients |
| Glass passivated junction | Ensures long-term parameter stability and low leakage drift over temperature and lifetime, critical for automotive reliability |
| MSL Level 1 rating | Allows standard SMT reflow without baking or special handling - reduces manufacturing cost and process risk |
| AEC-Q101 qualification path | HE3 suffix variants support automotive-grade qualification; this E3 version shares identical die and construction |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning ICs. Use Value: Clamps 1500 W surges to ≤25.2 V, preserving integrity of 3.3 V/5 V microcontrollers and ADCs without adding series impedance or propagation delay. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each isolated input channel, working in concert with optocouplers and filtering networks. Use Value: Withstands repetitive 10/1000 μs transients up to 0.01% duty cycle, ensuring uptime in factory automation environments with frequent motor switching. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control Board |
Use Scenario: Secondary protection on Ethernet PHY or RS-485 transceiver lines exposed to induced surges from nearby AC wiring or lightning coupling. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector, coordinated with common-mode chokes and GDTs in multi-stage protection architecture. Use Value: Sub-1 ns response time and low VC prevent latch-up or damage to high-speed transceivers operating at 100 Mbps+ data rates. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Snubber-style clamp across motor terminals or H-bridge outputs to limit flyback voltage to safe levels for MOSFETs and gate drivers. Use Value: 200 A IFSM rating supports single-event motor stall currents; bidirectional operation eliminates polarity concerns in AC-coupled drive circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Same VBR range (17.1–18.9 V) but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 85 °C/W) | Limited to lower-energy transients (e.g., ESD, low-level switching noise); unsuitable for 1500 W lightning surges | Select when board space is constrained and surge threat level is defined per IEC 61000-4-2, not IEC 61000-4-5 |
| 1.5KE18CA | Same 1500 W rating and VBR, but through-hole DO-201AE package; higher mounting thermal resistance | Requires wave soldering or hand assembly; incompatible with fully automated SMT lines | Choose only for legacy designs retaining through-hole infrastructure or where mechanical robustness outweighs assembly efficiency |
Compared with SMBJ18CA and 1.5KE18CA, the 1.5SMC18CA-E3/9AT delivers optimal balance of high-energy surge handling, SMT manufacturability, and thermal performance - making it the preferred choice for new automotive and industrial designs requiring AEC-Q101 scalability and 13" reel supply.
Availability
1.5SMC18CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface units, and consumer appliance motor control boards requiring stable component supply and RoHS-compliant sourcing.
Supply support for 1.5SMC18CA-E3/9AT 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 diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, precision, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, repeatable clamping, and AEC-Q101 readiness are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC18CA-E3/9AT under maximum surge conditions?
The 1.5SMC18CA-E3/9AT clamps to a maximum of 25.2 V when subjected to its rated 1500 W peak pulse (10/1000 μs waveform) at 59.5 A. This value is measured per JEDEC standards and represents the upper bound of voltage seen by downstream circuitry during worst-case transient events - critical for ensuring compatibility with 24 V system logic rails and interface ICs.
Is the 1.5SMC18CA-E3/9AT suitable for automotive applications?
Yes - the 1.5SMC18CA-E3/9AT uses the same die and construction as AEC-Q101 qualified variants (e.g., 1.5SMC18CAHE3_A). While the E3 suffix denotes commercial-grade qualification, its thermal performance (TJ max = +150 °C), MSL Level 1 rating, and UL 497B recognition make it suitable for under-hood and chassis-mounted automotive subsystems pending customer qualification.
How does the bidirectional design of the 1.5SMC18CA-E3/9AT affect PCB layout?
The 1.5SMC18CA-E3/9AT has no polarity marking and symmetrical terminals, so PCB layout requires no orientation alignment - either lead can connect to line or return. This simplifies routing in differential or AC-coupled paths and eliminates risk of reverse installation during automated placement, unlike unidirectional TVS diodes which require strict cathode alignment.
What is the maximum steady-state power dissipation for the 1.5SMC18CA-E3/9AT?
The 1.5SMC18CA-E3/9AT has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at 50 °C ambient. In typical SMT applications with 8.0 mm × 8.0 mm copper pads per terminal, derating applies above 25 °C per Figure 2 in the datasheet - actual usable DC power is limited to ~1.2 W at 70 °C ambient.
Does the 1.5SMC18CA-E3/9AT meet any safety or flammability standards?
Yes - the 1.5SMC18CA-E3/9AT's molding compound meets UL 94 V-0 flammability rating, and the device carries Underwriters Laboratories recognition (QVGQ2) under UL 497B for protector classification. These certifications validate its use in safety-critical surge protection circuits across industrial and telecom equipment.
1.5SMC18CA-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for 1.5SMC18CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18CA-E3/9AT 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-E3/9AT reliable?
The price and inventory of 1.5SMC18CA-E3/9AT 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-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC18CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18CA-E3/9AT?
1.5SMC18CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18CA-E3/9AT 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-E3/9AT?
For technical support, including 1.5SMC18CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC18CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18CA-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC18CA-E3/9AT?
All 1.5SMC18CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18CA-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC18CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18CA-E3/9AT Tags
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