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Vishay General Semiconductor - Diodes Division 1.5SMC18CAHE3_A/I
- Part No.:
- 1.5SMC18CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18CAHE3_A/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,746
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Product details
Overview
1.5SMC18CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features 1500 W peak pulse power (10/1000 μs), 18 V breakdown voltage (VBR = 17.1–18.9 V at IT = 1.0 mA), 15.3 V stand-off voltage (VWM), 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 1.5SMC18CAHE3_A/I datasheet, 1.5SMC18CAHE3_A/I pinout, 1.5SMC18CAHE3_A/I application, or 1.5SMC18CAHE3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMC package mechanical data, and real-world use cases for ESD and lightning transient suppression in bidirectional signal paths.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VWM, and clamping characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance enables rapid energy dissipation during transients.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), supports automated placement, and is qualified to AEC-Q101 for automotive applications. Thermal resistance is RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation up to TJ = +150 °C with appropriate PCB copper pad layout (0.31" × 0.31").
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at IT = 1.0 mA - defines precise voltage threshold where avalanche conduction begins in either polarity |
| VWM | 15.3 V - maximum continuous reverse working voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | ≤25.2 V at 59.5 A - clamping voltage under 10/1000 μs surge, limiting downstream IC stress during transient events |
| PPPM | 1500 W - peak pulse power handling capability, enabling protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| IPPM | 59.5 A - maximum non-repetitive peak pulse current (10/1000 μs), directly usable for PCB trace sizing and fuse coordination |
| TJ max. | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Bidirectional construction - no polarity marking on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (reverse polarity) | Accepts surge current when voltage exceeds VBR in negative direction; connects to protected line |
| Cathode | Transient current entry point (forward polarity) | Accepts surge current when voltage exceeds VBR in positive direction; connects to protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional symmetry | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC-coupled or differential signal lines |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 4 kV open-circuit/2 Ω source surges without degradation - suitable for industrial Ethernet and CAN FD bus protection |
| AEC-Q101 qualification | Validated for automotive under-hood and ADAS sensor modules requiring extended temperature cycling and long-term reliability |
| Low clamping ratio (VC/VBR) | 1.48 (25.2 V / 17.1 V min) - minimizes overvoltage stress on downstream 24 V-rated interface ICs such as RS-485 transceivers |
| MSL Level 1 | Compatible with standard lead-free reflow profiles up to 260 °C peak - supports high-yield automated assembly without pre-baking |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting LIN/CAN sensor nodes (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle chassis wiring. IC Role / Device Role: Bidirectional TVS placed between signal line and ground, shunting transients before they reach the transceiver input. Use Value: Clamps 10/1000 μs surges to ≤25.2 V, ensuring transceiver survival under 100 V/50 ms load dump events per ISO 16750-2. |
Use Scenario: Shielding RS-485 differential pairs in factory automation PLCs from EFT bursts and lightning-induced surges on long cable runs. IC Role / Device Role: Paired 1.5SMC18CAHE3_A/I devices (one per line) referenced to common ground, providing symmetrical overvoltage clamping. Use Value: 1500 W rating handles repetitive 4 kV surges per IEC 61000-4-5; low VC prevents latch-up in SN65HVD7x-series transceivers. |
| Consumer Appliance Motor Control | Telecom Power Input Stage |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role: Mounted across motor terminals or H-bridge outputs to clamp flyback spikes during PWM switching. Use Value: Fast response time and low Rsurge limit voltage overshoot to <26 V, preventing gate oxide damage in 30 V MOSFETs. |
Use Scenario: Front-end protection of 24 V telecom power supplies against AC line surges and induced transients on building wiring. IC Role / Device Role: Placed between input rectifier output and bulk capacitor, absorbing energy before it reaches DC-DC controllers. Use Value: 15.3 V VWM allows safe operation with 24 V nominal input; 1500 W rating sustains repeated 10/1000 μs surges without derating. |
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 PPPM = 600 W; same VBR range and SMC-compatible SMB (DO-214AA) package | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump | Select when space-constrained layouts require smaller footprint and surge requirements are ≤600 W |
| 1.5KE18CA | Higher PPPM = 1500 W but axial DO-15 package; slower thermal response due to higher RθJA (~100 °C/W) | Not suitable for automated SMT assembly; requires through-hole mounting and manual rework | Choose only for legacy through-hole designs where board rework is acceptable and SMT is unavailable |
Compared with SMBJ18CA and 1.5KE18CA, the 1.5SMC18CAHE3_A/I uniquely combines AEC-Q101 qualification, SMT-ready SMC packaging, and full 1500 W bidirectional surge capability - making it the preferred choice for new automotive and industrial SMT designs requiring production scalability and automotive reliability.
Availability
1.5SMC18CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 bus hardening, consumer motor drive circuits, and telecom power input stages requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC18CAHE3_A/I 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 optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in automotive, industrial, and telecom systems - prioritizing AEC-Q101 compliance, low clamping voltage, and robust surge handling in compact SMC packaging.
FAQ
What does the "CA" suffix mean in 1.5SMC18CAHE3_A/I?
The "CA" suffix in 1.5SMC18CAHE3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown, clamping, and leakage characteristics regardless of voltage polarity applied. This differs from unidirectional "A" variants, which conduct only in reverse bias and require correct cathode orientation.
Is 1.5SMC18CAHE3_A/I RoHS-compliant and halogen-free?
Yes, 1.5SMC18CAHE3_A/I is RoHS-compliant and carries the "HE3" suffix, indicating it meets RoHS Directive 2011/65/EU and is also AEC-Q101 qualified. It is not halogen-free; for halogen-free compliance, the "HM3" variant (e.g., 1.5SMC18CAHM3_A/I) must be selected per Vishay's ordering matrix.
What is the maximum clamping voltage of 1.5SMC18CAHE3_A/I under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC18CAHE3_A/I is 25.2 V at IPPM = 59.5 A with a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and represents the peak voltage seen by downstream circuitry during worst-case transient events.
Can 1.5SMC18CAHE3_A/I replace 1.5SMC18AHE3_A/I in a design?
No - 1.5SMC18CAHE3_A/I is bidirectional, while 1.5SMC18AHE3_A/I is unidirectional. Substituting them requires verifying circuit polarity, grounding scheme, and transient directionality. Unidirectional parts have a marked cathode band and conduct only in reverse bias; using the wrong type risks failure during positive-going transients.
What PCB pad layout is recommended for optimal thermal performance of 1.5SMC18CAHE3_A/I?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for 1.5SMC18CAHE3_A/I to achieve rated PPPM and thermal resistance (RθJA = 75 °C/W). Smaller pads reduce surge capability and increase junction temperature - derating curves in Figure 2 must be applied if pad area is reduced.
1.5SMC18CAHE3_A/I 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC18CAHE3_A/I FAQ
1.How can I place an order for 1.5SMC18CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18CAHE3_A/I 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 1.5SMC18CAHE3_A/I reliable?
The price and inventory of 1.5SMC18CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC18CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC18CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18CAHE3_A/I?
1.5SMC18CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18CAHE3_A/I 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 1.5SMC18CAHE3_A/I?
For technical support, including 1.5SMC18CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18CAHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC18CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18CAHE3_A/I 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 1.5SMC18CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC18CAHE3_A/I?
All 1.5SMC18CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18CAHE3_A/I, 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 1.5SMC18CAHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC18CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18CAHE3_A/I Tags
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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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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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