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Vishay General Semiconductor - Diodes Division 1.5SMC11AHE3/9AT
- Part No.:
- 1.5SMC11AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC11AHE3/9AT.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,673
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Product details
Overview
1.5SMC11AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 11 V breakdown voltage (VBR = 10.5–11.6 V at 1 mA), 9.4 V stand-off voltage (VWM), clamps to ≤15.6 V at 96.2 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC11AHE3/9AT datasheet, 1.5SMC11AHE3/9AT pinout, 1.5SMC11AHE3/9AT application, or 1.5SMC11AHE3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under 10/1000 µs surges, thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification status for automotive deployment.
Technical Context
The 1.5SMC11AHE3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to ESD and lightning-induced transients. Its clamping behavior is defined by a low incremental surge resistance and stable breakdown threshold across temperature (tempco = 0.075 %/°C).
It is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports continuous power dissipation of 6.5 W on infinite heatsink at 50 °C, and maintains operation from −65 °C to +150 °C junction temperature - critical for under-hood automotive environments and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 10.5 V / 11.6 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 9.4 V - maximum continuous reverse operating voltage before leakage exceeds 5 µA |
| VC @ IPPM | ≤15.6 V at 96.2 A (10/1000 µs) - ensures downstream ICs see safe clamped voltage during surge events |
| PPPM | 1500 W - peak transient energy absorption capability without failure under standardized surge waveform |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-energy inrush or fault currents in power rail protection |
| TJ max | +150 °C - enables use in high-temperature environments including engine control units and industrial inverters |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard PCB pad layout (8.0 mm × 8.0 mm copper) |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line ground or low-side return path | Enables conduction during reverse-transient clamping when cathode is held above anode potential |
| Cathode | Current exit point in forward bias; connected to protected circuit's positive rail or signal line | Band-marked terminal; reverse-biased during normal operation; avalanches to clamp overvoltage to VC |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; resists moisture ingress and contamination in harsh environments |
| 1500 W peak pulse power (10/1000 µs) | Provides robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 4 surges without derating |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free SMT assembly without popcorn cracking or delamination risk |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., EFT bursts), improving protection margin |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges >35 V to ≤15.6 V. Use Value: Prevents damage to MCU power domains and CAN transceivers during 120 V/500 ms load dump events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt transients before reaching op-amp or ADC input stage. Use Value: Maintains signal integrity by limiting transient-induced offset shift and preventing latch-up in precision front-ends. |
| DC-DC Converter Input Protection | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding buck converter inputs against inductive kickback from upstream relays or solenoids. IC Role / Device Role / Timing Role: Placed across input capacitor to absorb repetitive 1500 W pulses without degradation. Use Value: Extends capacitor and controller lifetime by eliminating voltage spikes that accelerate dielectric wear. |
Use Scenario: Protecting high-side gate drivers in 3-phase inverters from Miller-induced shoot-through during switching transitions. IC Role / Device Role / Timing Role: Clamps gate-source voltage spikes to prevent unintended turn-on of SiC or GaN FETs. Use Value: Reduces false triggering and improves system reliability in high-dV/dt motor control applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A-E3/52T | Lower peak power (600 W), SMB package (smaller footprint), same VBR range and AEC-Q101 qualification | Preferred for space-constrained designs where 1500 W margin is not required (e.g., low-power sensors) | Select when board area is limited and surge energy is below 600 W; verify thermal derating for continuous duty |
| 1.5KE11A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL-1 rating | Suitable for industrial prototyping or legacy through-hole assemblies lacking automotive compliance needs | Choose only for non-automotive applications where reflow compatibility and automotive qualification are not required |
Compared with 1.5SMC11AHE3/9AT, SMBJ11A-E3/52T trades peak power for compactness and remains automotive-qualified, while 1.5KE11A offers identical clamping performance in a legacy through-hole form but lacks AEC-Q101 validation and SMT process support.
Availability
1.5SMC11AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and sensor interface circuits requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for 1.5SMC11AHE3/9AT 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, efficiency, and application-specific optimization.
The 1.5SMC Series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC11AHE3/9AT under a 10/1000 µs surge?
The 1.5SMC11AHE3/9AT clamps to a maximum of 15.6 V when subjected to its rated peak pulse current of 96.2 A using the standard 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and represents the upper limit of voltage seen by downstream circuitry during surge events. The 1.5SMC11AHE3/9AT achieves this with low incremental resistance, ensuring minimal overshoot beyond VC.
Is the 1.5SMC11AHE3/9AT AEC-Q101 qualified?
Yes, the 1.5SMC11AHE3/9AT is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation (Document Number 88303, Revision 09-Mar-2026). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD per the AEC-Q101 standard, making the 1.5SMC11AHE3/9AT suitable for automotive powertrain, body, and chassis applications where reliability under thermal and electrical stress is critical.
What does the "HE3/9AT" suffix mean in 1.5SMC11AHE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, while "9AT" specifies packaging in a 13-inch diameter plastic tape-and-reel format containing 3500 units. This differs from "57T" (7-inch reel, 850 units) and confirms the 1.5SMC11AHE3/9AT is optimized for high-volume SMT production with full automotive-grade traceability and reflow compatibility up to 260 °C (MSL Level 1).
Can the 1.5SMC11AHE3/9AT be used in bidirectional configurations?
No, the 1.5SMC11AHE3/9AT is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC11CA). Using the 1.5SMC11AHE3/9AT in reverse-biased signal paths would result in forward conduction and failure. For AC or dual-polarity protection, select a verified bidirectional part - the 1.5SMC11AHE3/9AT must be oriented with cathode toward the protected line's higher potential.
What is the maximum operating junction temperature for the 1.5SMC11AHE3/9AT?
The 1.5SMC11AHE3/9AT has a maximum junction temperature (TJ) of +150 °C, validated across its full operating range (−65 °C to +150 °C). This rating enables deployment in under-hood automotive modules and industrial motor drives where ambient temperatures exceed 105 °C. Derating curves in the datasheet (Fig. 2) specify allowable pulse power reduction above 25 °C ambient, and thermal design must account for RθJA = 75 °C/W on standard PCB layout.
1.5SMC11AHE3/9AT 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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 96.2A
- 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)
1.5SMC11AHE3/9AT FAQ
1.How can I place an order for 1.5SMC11AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC11AHE3/9AT 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 1.5SMC11AHE3/9AT reliable?
The price and inventory of 1.5SMC11AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC11AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC11AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC11AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC11AHE3/9AT?
1.5SMC11AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC11AHE3/9AT 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 1.5SMC11AHE3/9AT?
For technical support, including 1.5SMC11AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC11AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC11AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC11AHE3/9AT 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 1.5SMC11AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC11AHE3/9AT?
All 1.5SMC11AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC11AHE3/9AT, 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 1.5SMC11AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC11AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC11AHE3/9AT Tags
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