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Vishay General Semiconductor - Diodes Division 1.5SMC15AHE3/9AT
- Part No.:
- 1.5SMC15AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15AHE3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,869
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Product details
Overview
1.5SMC15AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features 15 V standoff voltage (VWM), 15.8 V maximum breakdown voltage (VBR), 21.2 V clamping voltage at 70.8 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 μs waveform - ideal for protecting automotive sensor signal lines against ESD and load-switching transients.
For engineers reviewing the 1.5SMC15AHE3/9AT datasheet, 1.5SMC15AHE3/9AT pinout, 1.5SMC15AHE3/9AT application, or 1.5SMC15AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
The 1.5SMC15AHE3/9AT operates as a clamping-type TVS diode, leveraging a glass-passivated silicon junction to achieve fast response time (<1 ns) and stable breakdown behavior under repetitive transient stress. Its unidirectional configuration provides forward conduction path during positive surges while blocking reverse leakage below 12.8 V.
Designed for high-energy transient suppression, it delivers 70.8 A peak pulse current (IPPM) at 21.2 V clamping voltage under 10/1000 μs waveform, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads). It meets MSL level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12.8 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for protected circuitry. |
| VBR (Breakdown Voltage) | 14.3–15.8 V at 1.0 mA test current - precise voltage threshold where avalanche conduction initiates reliably. |
| VC (Clamping Voltage) | 21.2 V at 70.8 A IPPM - maximum voltage seen by downstream ICs during worst-case transient; critical for MOSFET/IC survivability. |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capacity for 10/1000 μs transients; enables protection against lightning-induced surges and inductive kickback. |
| TJ max | 150 °C - maximum junction temperature rating; supports operation in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; optimized for thermal dissipation and automated assembly. |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to ground or low-side return path; establishes reference for clamping action during positive transients. |
| Cathode | Reverse voltage input / Clamping output node | Connected to protected line (e.g., sensor supply or signal); conducts avalanche current when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature; eliminates surface degradation risks in humid environments. |
| 1500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) without derating in typical PCB layouts. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for sub-20 V logic interfaces. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics requiring zero-failure field performance. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow soldering without moisture sensitivity concerns or pre-bake requirements. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor VOUT and ground to shunt transients before reaching ADC input stage. Use Value: Limits voltage excursion to ≤21.2 V during 70.8 A surges, preserving 12-bit ADC accuracy and preventing latch-up in microcontroller front-end circuits. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Standoff device mounted at connector interface to clamp induced spikes before optocoupler or Schmitt trigger input. Use Value: Withstands 1500 W pulses without degradation, enabling >100,000 surge cycles per channel in factory automation systems. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Secondary-side transient suppression on Ethernet PHY power rails (3.3 V/5 V) in PoE-powered switches vulnerable to crosstalk-induced surges. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS tied between VCC and GND to clamp common-mode noise coupled onto DC bias lines. Use Value: 21.2 V clamping ensures PHY ICs remain within absolute maximum ratings even during simultaneous 10/1000 μs surges on multiple ports. |
Use Scenario: Output rail protection in USB-C PD adapters where secondary-side transients may propagate from transformer leakage or MOSFET switching. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5–20 V output to absorb residual ringing and ESD events before connector. Use Value: 12.8 V VWM provides sufficient margin above nominal output while maintaining fast clamping to protect connected devices' USB controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T | Same VWM/VBR/VC specs but lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 3+ or automotive load dump. | Select only for space-constrained consumer applications with <500 W surge exposure. |
| 1.5KE15A | Through-hole TO-204AA (DO-41) package; identical electrical specs but no AEC-Q101 qualification or MSL-1 rating. | Not suitable for automated SMT production or automotive under-hood use; requires wave soldering. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMAJ15A-E3/57T and 1.5KE15A, the 1.5SMC15AHE3/9AT uniquely combines 1500 W surge capability, AEC-Q101 qualification, and SMC package thermal performance - making it the only option among the three validated for high-reliability automotive and industrial SMT deployments.
Availability
1.5SMC15AHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom line protection, and consumer power adapter outputs requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC15AHE3/9AT 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, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 1.5SMC Series was developed specifically for high-power surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and 1500 W surge handling in compact SMC packages.
FAQ
What is the clamping voltage of the 1.5SMC15AHE3/9AT at its rated peak pulse current?
The 1.5SMC15AHE3/9AT has a maximum clamping voltage (VC) of 21.2 V at 70.8 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected downstream components will not experience voltages exceeding 21.2 V during specified surge events - a critical parameter for ensuring reliability of 24 V automotive and industrial interfaces.
Is the 1.5SMC15AHE3/9AT qualified for automotive applications?
Yes, the 1.5SMC15AHE3/9AT is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number. This qualification covers rigorous stress tests including temperature cycling, high-temperature operating life, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics such as engine control units, ADAS camera modules, and battery management system interfaces.
What does the "9AT" suffix indicate in 1.5SMC15AHE3/9AT?
The "9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel with 3500 units per reel. This format supports high-volume automated SMT placement and is compatible with standard pick-and-place equipment. The "HE3" portion confirms RoHS-compliant construction and AEC-Q101 qualification, distinguishing it from commercial-grade E3 or halogen-free HM3 variants.
How does the 1.5SMC15AHE3/9AT differ from bidirectional TVS diodes like 1.5SMC15CA?
The 1.5SMC15AHE3/9AT is unidirectional and features a cathode band marking, allowing it to conduct forward current while clamping reverse transients - ideal for DC power rail or signal-line protection with defined polarity. In contrast, 1.5SMC15CA is bidirectional, symmetric in both directions, and lacks polarity marking; it's used where AC-coupled or polarity-agnostic protection is needed, such as telecom line interfaces or differential data buses.
What is the thermal resistance of the 1.5SMC15AHE3/9AT, and how does it affect layout design?
The 1.5SMC15AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under full 1500 W surge conditions, designers must ensure adequate copper area and avoid excessive trace length - underscoring the need for adherence to Vishay's recommended pad layout in the datasheet for reliable long-term operation.
1.5SMC15AHE3/9AT 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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)
1.5SMC15AHE3/9AT FAQ
1.How can I place an order for 1.5SMC15AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15AHE3/9AT 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 1.5SMC15AHE3/9AT reliable?
The price and inventory of 1.5SMC15AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC15AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC15AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15AHE3/9AT?
1.5SMC15AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15AHE3/9AT 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 1.5SMC15AHE3/9AT?
For technical support, including 1.5SMC15AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC15AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15AHE3/9AT 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 1.5SMC15AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC15AHE3/9AT?
All 1.5SMC15AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15AHE3/9AT, 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 1.5SMC15AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC15AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC15AHE3/9AT Tags
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