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Vishay General Semiconductor - Diodes Division 1.5SMC18CA-E3/57T
- Part No.:
- 1.5SMC18CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18CA-E3/57T.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,287
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Product details
Overview
1.5SMC18CA-E3/57T 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 min/max = 17.1–18.9 V at 1 mA), and clamps transients to ≤25.2 V at 59.5 A, making it suitable for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the 1.5SMC18CA-E3/57T datasheet, 1.5SMC18CA-E3/57T pinout, 1.5SMC18CA-E3/57T application, or 1.5SMC18CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, SMC (DO-214AB) package compatibility, low incremental surge resistance, and AEC-Q101 qualification readiness via HE3 suffix variants.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low Rsurge supports effective energy diversion during ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 75 °C/W) reflects performance on standard 8.0 mm × 8.0 mm copper pads, and it delivers 6.5 W steady-state power dissipation at 50 °C ambient.
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 reliably under transient stress |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA, ensuring no false triggering |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during full 1500 W surge, directly limiting downstream IC stress |
| PPPM | 1500 W (10/1000 μs waveform) - peak transient energy handling capacity for lightning and inductive switch-off events |
| IPPM | 59.5 A - maximum non-repetitive surge current the device safely conducts without degradation |
| Junction Temp Range | −65 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded case with UL 94 V-0 flammability rating; terminals are matte tin plated and solderable per J-STD-002/JESD 22-B102. Bidirectional configuration has no polarity marking - both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 2; either terminal serves as input/output path for transient current in either direction |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired symmetrical terminal enabling dual-polarity clamping without orientation constraints on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands high-energy transients from inductive load switching or lightning-induced surges in industrial systems |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1 μA at VWM) across temperature and lifetime |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning or baking |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications requiring validated reliability per stress test standards |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential or single-ended signal lines to clamp ±25 V transients before they reach sensitive analog front-ends. Use Value: Limits clamped voltage to 25.2 V at 59.5 A, preventing damage to 3.3 V/5 V sensor signal conditioning ICs and maintaining signal integrity. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Mounted across input terminals to shunt transient energy away from optocoupler inputs and microcontroller GPIO pins. Use Value: Delivers 1500 W surge handling with <1 ns response, ensuring immunity to 1 kV/μs fast-rising transients common in factory floor environments. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHY interfaces and RS-485 transceivers from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Placed between line pair and ground to suppress common-mode transients while preserving signal bandwidth. Use Value: Symmetrical clamping maintains balanced line integrity and avoids DC bias shift, critical for high-speed data links. |
Use Scenario: Secondary-side overvoltage protection on 12 V/19 V DC outputs of wall adapters and USB-C PD chargers. IC Role / Device Role / Timing Role: Connected across output rails to clamp fault conditions (e.g., feedback loop failure) before connected devices are damaged. Use Value: Withstands repetitive 1500 W pulses at 0.01% duty cycle, providing reliable fail-safe behavior during sustained overvoltage events. |
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 (17.1–18.9 V), SMB (DO-214AA) package - 30% smaller footprint but higher thermal resistance (RθJA ≈ 110 °C/W) | Preferred for space-constrained consumer electronics where 600 W surge margin suffices; not recommended for industrial lightning-level threats | Select SMBJ18CA only when board area is critical and surge energy remains below 600 W; verify thermal derating on small pads |
| 1.5KE18CA | Through-hole TO-204AA (DO-41) package, identical electrical specs (1500 W, 17.1–18.9 V VBR), higher IFSM (200 A), but incompatible with SMT assembly | Suitable for legacy through-hole designs or prototyping where manual assembly or high-surge redundancy is prioritized over automation | Choose 1.5KE18CA only for non-SMT platforms or when mechanical robustness under vibration justifies leaded mounting |
Compared with SMBJ18CA and 1.5KE18CA, the 1.5SMC18CA-E3/57T uniquely balances 1500 W surge capability, SMT manufacturability, and DO-214AB thermal performance-making it optimal for high-reliability automated production targeting automotive and industrial end equipment.
Availability
1.5SMC18CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, telecom line interface shielding, and consumer power adapter secondary-side clamping requiring stable component supply and RoHS-compliant sourcing.
Supply support for 1.5SMC18CA-E3/57T 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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for demanding automotive, industrial, and telecom applications-prioritizing low clamping voltage, repeatable surge endurance, and seamless SMT integration.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC18CA-E3/57T?
The 1.5SMC18CA-E3/57T has a specified breakdown voltage range of 17.1 V to 18.9 V at 1 mA test current, representing a ±5.6% tolerance around the nominal 18 V rating. This tight VBR window ensures consistent clamping onset across production lots and temperature extremes, critical for protecting 15 V-rated circuits without premature conduction.
Is the 1.5SMC18CA-E3/57T RoHS-compliant and halogen-free?
Yes, the 1.5SMC18CA-E3/57T carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free and RoHS-compliant versions, specify the "M3" suffix (e.g., 1.5SMC18CA-M3/57T), which meets IEC 61249-2-21 requirements.
Does the 1.5SMC18CA-E3/57T require orientation during PCB placement?
No - the 1.5SMC18CA-E3/57T is a bidirectional TVS diode with symmetrical terminals and no polarity marking. Either end may connect to line or ground; orientation is irrelevant. This eliminates assembly errors and simplifies layout for differential or floating signal paths where polarity is undefined.
What is the maximum clamping voltage of the 1.5SMC18CA-E3/57T under surge conditions?
The 1.5SMC18CA-E3/57T clamps to a maximum of 25.2 V when subjected to its rated 59.5 A peak pulse current (10/1000 μs waveform). This value is guaranteed across temperature and lifetime, and represents the highest voltage seen by downstream circuitry during worst-case transient events - essential for validating safe operation of 3.3 V or 5 V logic interfaces.
Can the 1.5SMC18CA-E3/57T be used in automotive applications?
While the base 1.5SMC18CA-E3/57T is commercial-grade, Vishay offers AEC-Q101 qualified variants under the HE3 suffix (e.g., 1.5SMC18CAHE3_A). These undergo rigorous stress testing including HTOL, TCT, and ESD per AEC-Q101 Rev D. For automotive use, specify the HE3 or HM3 version - the E3/57T itself is not AEC-Q101 certified.
1.5SMC18CA-E3/57T 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-E3/57T FAQ
1.How can I place an order for 1.5SMC18CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18CA-E3/57T 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-E3/57T reliable?
The price and inventory of 1.5SMC18CA-E3/57T 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-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC18CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18CA-E3/57T?
1.5SMC18CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18CA-E3/57T 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-E3/57T?
For technical support, including 1.5SMC18CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC18CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18CA-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC18CA-E3/57T?
All 1.5SMC18CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18CA-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC18CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18CA-E3/57T Tags
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