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Vishay General Semiconductor - Diodes Division SM15T18CAHE3_A/H
- Part No.:
- SM15T18CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T18CAHE3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,782
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Product details
Overview
SM15T18CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 18 V standoff voltage (VWM), 25.2 V max clamping voltage at 59.5 A IPPM, and −65 °C to +150 °C operating junction temperature. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T18CAHE3_A/H datasheet, SM15T18CAHE3_A/H pinout, SM15T18CAHE3_A/H application, or SM15T18CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low-inductance SMC package layout compatibility, and verified 1500 W surge handling per IEC 61000-4-5 Level 4 requirements.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical breakdown (VBR min/max = 17.1 V / 18.9 V at IT = 1.0 mA) and clamping behavior (VC = 25.2 V at IPPM = 59.5 A). Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust surge endurance under repetitive transient stress.
Thermal design relies on RθJL = 15 °C/W and RθJA = 75 °C/W, requiring minimum 8.0 mm × 8.0 mm copper pads per terminal for full 1500 W rating. The device fails short-circuit under overstress, aligning with fail-safe system architectures in automotive and industrial control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe interface voltage margin for 12 V/24 V systems. |
| VBR (min/max) | 17.1 V / 18.9 V at 1.0 mA - Confirmed bidirectional breakdown threshold; ensures symmetrical overvoltage protection on differential or AC-coupled lines. |
| VC @ IPPM | 25.2 V at 59.5 A (10/1000 μs) - Clamping voltage during worst-case surge; limits downstream IC stress below 28 V absolute maximum ratings. |
| PPPM | 1500 W - Peak pulse power handling per IEC 61000-4-5 waveform; supports Level 4 (4 kV) surge immunity without derating. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and high-ambient industrial enclosures without thermal shutdown. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, and ESD testing; required for CAN/LIN bus and ADAS sensor protection. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (cathode band side) | Bidirectional symmetry means no polarity marking; either terminal serves as reference for transient conduction in either direction. |
| Cathode | Terminal 2 (opposite cathode band side) | Same electrical role as Anode due to bidirectional construction; terminals are interchangeable in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 4 kV surges on 50 Ω source impedance without series impedance or cascaded stages. |
| Glass-passivated chip junction | Ensures <1.0 μA reverse leakage at 18 V and stable VBR over 1000+ surge cycles; critical for low-power sensor bias networks. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock; eliminates need for additional qualification testing. |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time); clamping response remains effective up to 100 MHz signal bandwidth. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching ASIC input pins. Use Value: Maintains signal integrity under 100 V/μs transients while holding clamped voltage ≤25.2 V, preventing latch-up in 3.3 V/5 V sensor signal chains. |
Use Scenario: Safeguarding RS-485/RS-232 communication ports on PLC backplanes subjected to lightning-induced surges on field wiring. IC Role / Device Role / Timing Role: Primary surge suppression device mounted adjacent to connector, coordinated with GDT or MOV for staged protection. Use Value: Absorbs 1500 W peak energy without degradation, enabling compliance with IEC 61000-4-5 Ed. 3 Level 4 (4 kV line-to-ground) test requirements. |
| Consumer Power Adapter Input | Telecom DC Power Feed |
Use Scenario: Input-stage transient suppression on 12 V/24 V wall adapters used in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: First-line defense against EFT bursts and capacitive discharge events entering via AC/DC primary-side rectifier output. Use Value: Withstands ≥1000 surges at rated IPPM while maintaining VWM stability; eliminates need for redundant TVS devices in cost-sensitive BOMs. |
Use Scenario: DC feed line protection in PoE-powered base stations and remote radio units where 48 V supply lines are routed alongside antennas. IC Role / Device Role / Timing Role: Bidirectional clamp on +48 V and return lines to suppress common-mode surges induced by nearby RF transmission. Use Value: Symmetric clamping ensures equal protection on both conductors, preventing ground shift and data corruption in Ethernet PHY interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CA | Lower PPPM (400 W), same VWM (18 V), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use with lower surge exposure | Select when space-constrained layouts preclude SMC and surge threat is ≤1 kV (IEC 61000-4-4). |
| SMCJ18CA | Same PPPM (1500 W), same VWM (18 V), identical SMC package, but HE3 suffix not guaranteed AEC-Q101 | May lack automotive qualification documentation; requires verification of specific lot traceability for automotive programs | Select only if AEC-Q101 is not mandated and cost sensitivity outweighs long-term qualification assurance. |
Compared with SMAJ18CA and SMCJ18CA, SM15T18CAHE3_A/H delivers assured AEC-Q101 qualification, tighter VBR tolerance (±5.6% vs ±10%), and validated 1500 W performance on standard 8 mm² pads-making it the preferred choice for production automotive and high-reliability industrial designs.
Availability
SM15T18CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom DC power feed applications requiring stable component supply, long lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SM15T18CAHE3_A/H 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, power efficiency, and automotive-grade qualification.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T18CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T18CAHE3_A/H provides symmetrical clamping in both forward and reverse directions. This enables protection of AC-coupled signals, differential buses like LIN or RS-485, and ungrounded power rails without polarity concerns-unlike unidirectional variants (e.g., SM15T18A) that require correct anode/cathode orientation.
Is SM15T18CAHE3_A/H suitable for IEC 61000-4-5 Level 4 compliance?
Yes, SM15T18CAHE3_A/H is rated for 1500 W peak pulse power with a 10/1000 μs waveform, which meets IEC 61000-4-5 Level 4 (4 kV line-to-ground, 2 Ω source impedance) when mounted on 8.0 mm × 8.0 mm copper pads. Its 25.2 V clamping voltage at 59.5 A ensures downstream circuitry remains within safe operating limits during full-level surges.
How does the HE3 suffix affect SM15T18CAHE3_A/H qualification status?
The HE3 suffix confirms SM15T18CAHE3_A/H is RoHS-compliant and AEC-Q101 qualified. This includes validation for high-temperature operating life (HTOL), temperature cycling (TC), and electrostatic discharge (HBM/MM), making it suitable for automotive under-hood and chassis-mounted applications where reliability is non-negotiable.
What is the maximum reverse leakage current for SM15T18CAHE3_A/H at rated VWM?
At 18 V standoff voltage (VWM) and TA = 25 °C, SM15T18CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage preserves battery life in always-on automotive modules and avoids loading sensitive analog sensor references.
Can SM15T18CAHE3_A/H replace SM15T18A in an existing design?
No-SM15T18CAHE3_A/H is bidirectional while SM15T18A is unidirectional. Substituting them requires verifying circuit topology: SM15T18CAHE3_A/H may be used in place of SM15T18A only if polarity-insensitive clamping is acceptable and no DC bias conflicts exist. Layout changes are unnecessary (same SMC package), but functional validation is mandatory.
SM15T18CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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)
SM15T18CAHE3_A/H FAQ
1.How can I place an order for SM15T18CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T18CAHE3_A/H 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 SM15T18CAHE3_A/H reliable?
The price and inventory of SM15T18CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T18CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T18CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T18CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T18CAHE3_A/H?
SM15T18CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T18CAHE3_A/H 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 SM15T18CAHE3_A/H?
For technical support, including SM15T18CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T18CAHE3_A/H requirements.
6.How does Aetrix verify that SM15T18CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T18CAHE3_A/H 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 SM15T18CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T18CAHE3_A/H?
All SM15T18CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T18CAHE3_A/H, 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 SM15T18CAHE3_A/H part is unused and in its original packaging.
Return procedure for SM15T18CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T18CAHE3_A/H Tags
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