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Vishay General Semiconductor - Diodes Division 1.5SMC9.1AHE3/9AT
- Part No.:
- 1.5SMC9.1AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1AHE3/9AT.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,861
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Product details
Overview
1.5SMC9.1AHE3/9AT 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 a 7.78 V stand-off voltage (VWM), 8.65–9.55 V breakdown voltage (VBR) at 1.0 mA, 13.4 V maximum clamping voltage (VC) at 112 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 μs waveform - ideal for automotive sensor line and power rail protection.
For engineers reviewing the 1.5SMC9.1AHE3/9AT datasheet, 1.5SMC9.1AHE3/9AT pinout, 1.5SMC9.1AHE3/9AT application, or 1.5SMC9.1AHE3/9AT equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ns), and RoHS-compliant matte tin-plated terminals suitable for automated placement on industrial and automotive PCBs.
Technical Context
The 1.5SMC9.1AHE3/9AT operates as a unidirectional avalanche-clamping TVS diode, leveraging glass-passivated silicon junction technology to suppress transient overvoltages before they damage downstream ICs or MOSFETs. Its clamping action begins at VWM = 7.78 V and fully engages at VC = 13.4 V under 112 A (10/1000 μs), with thermal resistance RθJA = 75 °C/W enabling reliable operation up to TJ = 150 °C.
It is rated for repetitive 0.01% duty cycle surges and meets J-STD-020 MSL Level 1 (260 °C peak reflow). The cathode-band polarity marking enables unambiguous orientation during automated assembly, and its DO-214AB footprint supports standard SMC land patterns with 8.0 mm × 8.0 mm copper pads per terminal for optimal thermal dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 7.78 V - Maximum continuous reverse voltage before leakage exceeds 50 μA; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 8.65–9.55 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot and temperature. |
| VC (Clamping) | 13.4 V at 112 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on 12 V automotive loads. |
| PPPM | 1500 W - Peak pulse power handling capacity; sustains high-energy transients like ISO 7637-2 Pulse 1/2a without failure. |
| IPPM | 112 A - Maximum non-repetitive surge current; validates compatibility with common automotive load-dump profiles. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood deployment in engine control units and ADAS modules. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability including HTOL, TC, and ESD testing; required for safety-critical ECUs. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with UL 94 V-0 flammability rating; dimensions 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential node; forms clamping path when cathode is at higher potential. |
| Cathode | Clamping output / Surge sink | Marked with band; connected to protected line (e.g., 12 V supply or CAN-H); conducts surge current to ground during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, high-temp operating life, and ESD robustness - eliminates need for additional qualification testing. |
| 1500 W peak pulse power | Withstands ISO 7637-2 load dump pulses (up to 120 V, 100 ms) and EFT bursts without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during clamping - critical for protecting 12 V logic interfaces and microcontrollers with tight absolute maximum ratings. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard lead-free reflow profiles up to 260 °C peak. |
| Glass-passivated junction | Ensures stable leakage performance and long-term reliability under humidity and thermal stress - reduces field failure risk in harsh environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs (e.g., body control modules) against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 12 V rail to ≤13.4 V during 112 A surges, preventing overvoltage shutdown or latch-up of downstream regulators and MCUs. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise in factory automation systems. IC Role / Device Role / Timing Role: TVS installed at connector interface, shunting transients to chassis ground before signal enters ADC front-end. Use Value: Limits induced voltage spikes to <13.4 V, preserving signal integrity and avoiding ADC saturation or op-amp rail-to-rail clipping. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary TVS on DC input before isolation transformer or DC-DC stage. Use Value: Absorbs up to 1500 W surge energy while maintaining VC ≤13.4 V - sufficient for Class 4 PoE (≤57 V) with appropriate series impedance. |
Use Scenario: Adding secondary-level surge immunity to USB VBUS lines in portable speakers or smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: TVS placed adjacent to USB connector, grounded to local shield plane. Use Value: Responds in <1 ns to ±15 kV contact ESD (IEC 61000-4-2), limiting VBUS overshoot to safe levels for USB PHY and power switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Lower peak power (600 W), smaller SMB package (DO-214AA), VC = 14.4 V at 41.7 A - less robust for automotive load dump. | Best suited for space-constrained consumer electronics where 1500 W rating is unnecessary. | Select only if board area is critical and surge threat level is limited to IEC 61000-4-5 Level 3 (0.5 kV/1.0 kV). |
| 1.5KE9.1A | Through-hole TO-204AE (DO-41) package, same VBR/VC specs but no AEC-Q101 qualification; higher RθJA (~100 °C/W). | Used in legacy industrial power supplies where manual assembly and thermal mass compensate for lower power density. | Choose only for non-automotive, non-SMT designs requiring proven field history but not automotive compliance. |
Compared with SMBJ9.0A and 1.5KE9.1A, the 1.5SMC9.1AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC surface-mount compatibility - making it the only option among the three qualified for new automotive electronics requiring both high-reliability and automated manufacturing.
Availability
1.5SMC9.1AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power input protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC9.1AHE3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered specifically 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 is the clamping voltage of the 1.5SMC9.1AHE3/9AT under maximum surge conditions?
The 1.5SMC9.1AHE3/9AT has a maximum clamping voltage (VC) of 13.4 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 112 A. This value is measured under standardized test conditions per JEDEC standards and reflects the highest voltage the protected circuit will experience during worst-case transient events - critical for ensuring compatibility with 12 V system components.
Is the 1.5SMC9.1AHE3/9AT qualified for automotive applications?
Yes, the 1.5SMC9.1AHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD robustness - making the 1.5SMC9.1AHE3/9AT suitable for use in engine control units, ADAS sensors, and other automotive electronic control modules.
What does the "HE3" and "9AT" suffix mean in 1.5SMC9.1AHE3/9AT?
The "HE3" suffix indicates 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 configuration supports high-volume automated pick-and-place assembly and ensures full traceability and compliance documentation for automotive and industrial production lines using the 1.5SMC9.1AHE3/9AT.
How does the 1.5SMC9.1AHE3/9AT compare to bidirectional TVS diodes like 1.5SMC9.1CA?
The 1.5SMC9.1AHE3/9AT is unidirectional and intended for DC line protection where polarity is fixed (e.g., 12 V supply rails), offering tighter VBR tolerance and lower leakage than bidirectional variants. In contrast, 1.5SMC9.1CA provides symmetrical clamping for AC or floating lines (e.g., data buses), but its VBR is specified for both polarities and exhibits higher reverse leakage - the 1.5SMC9.1AHE3/9AT is not interchangeable with it without circuit redesign.
What is the thermal resistance and maximum junction temperature of the 1.5SMC9.1AHE3/9AT?
The 1.5SMC9.1AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, and a maximum junction temperature (TJ) rating of +150 °C. These values enable reliable operation in under-hood automotive environments and industrial enclosures without forced cooling - provided PCB layout adheres to Vishay's recommended pad dimensions.
1.5SMC9.1AHE3/9AT 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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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)
1.5SMC9.1AHE3/9AT FAQ
1.How can I place an order for 1.5SMC9.1AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1AHE3/9AT 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 1.5SMC9.1AHE3/9AT reliable?
The price and inventory of 1.5SMC9.1AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1AHE3/9AT?
1.5SMC9.1AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1AHE3/9AT 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 1.5SMC9.1AHE3/9AT?
For technical support, including 1.5SMC9.1AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC9.1AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1AHE3/9AT 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 1.5SMC9.1AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1AHE3/9AT?
All 1.5SMC9.1AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1AHE3/9AT, 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 1.5SMC9.1AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC9.1AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1AHE3/9AT Tags
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