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Vishay General Semiconductor - Diodes Division 1.5SMC9.1CAHE3/9AT
- Part No.:
- 1.5SMC9.1CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1CAHE3/9AT.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,321
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Product details
Overview
1.5SMC9.1CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), clamps to ≤13.4 V at 112 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC9.1CAHE3/9AT datasheet, 1.5SMC9.1CAHE3/9AT pinout, 1.5SMC9.1CAHE3/9AT application, or 1.5SMC9.1CAHE3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, SMC (DO-214AB) package thermal performance, and compliance with UL 497B for telecom protector classification.
Technical Context
The 1.5SMC9.1CAHE3/9AT operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<50 µA at VWM), while the 1500 W peak pulse rating supports repetitive 0.01% duty cycle surges per JEDEC standards.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation up to TJ = +150 °C. The device meets MSL Level 1 (260 °C reflow peak) and is qualified to AEC-Q101 for automotive underhood applications - confirmed by HE3 suffix and Vishay's automotive ordering code documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 8.65–9.55 V at 1.0 mA test current - defines precise clamping onset threshold for bidirectional surge events |
| Stand-off Voltage VWM | 7.78 V maximum - ensures no conduction during normal 9 V rail operation, minimizing standby leakage |
| Clamping Voltage VC | ≤13.4 V at 112 A IPPM - limits downstream IC stress to safe levels during 10/1000 µs lightning-induced surges |
| Peak Pulse Power PPPM | 1500 W (10/1000 µs waveform) - sustains high-energy transients common in automotive load-dump and inductive switching |
| Operating Temperature | −65 °C to +150 °C - supports deployment in engine control units, industrial PLCs, and outdoor telecom equipment |
| AEC-Q101 Qualified | Yes - verified for automotive reliability including temperature cycling, HTRB, and ESD per AEC specification |
| Package | SMC (DO-214AB) - surface-mount footprint with 8.0 mm × 8.0 mm copper pad thermal relief and UL 94 V-0 molding compound |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; bidirectional configuration has no polarity marking - terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Reversible surge conduction path | Both terminals behave identically - enables placement without orientation check, simplifying automated assembly |
| Case / Body | Thermal and mechanical interface | Exposed metal-free plastic body; heat dissipation relies on PCB copper pads (0.31″ × 0.31″ minimum per terminal) |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy surges from inductive load switching and ISO 7637-2 pulse 5a without degradation |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive underhood use - includes HTOL, temperature cycling, and ESD testing per AEC standard |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<50 µA at VWM) across lifetime and temperature |
| MSL Level 1 moisture sensitivity | Allows direct placement into standard SMT reflow without baking - compatible with J-STD-020 peak of 260 °C |
| UL 497B recognition (QVGQ2) | Approved for telecom line protection applications requiring certified surge protector classification |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role: Bidirectional clamping element placed directly at connector entry point before signal conditioning circuitry. Use Value: Clamps 112 A surges to ≤13.4 V, preserving integrity of 5 V/3.3 V logic rails and preventing latch-up in downstream ASICs. |
Use Scenario: Shielding PLC digital input modules from field-wiring induced surges due to relay coil flyback or nearby motor switching. IC Role / Device Role: Primary TVS at terminal block, coordinated with series impedance to limit let-through energy. Use Value: 1500 W rating absorbs repetitive 0.01% duty cycle surges without derating, extending system uptime in factory automation. |
| Telecom Line Protection | Consumer Power Adapter Input |
|
Use Scenario: Safeguarding Ethernet PHYs and DSL line drivers against lightning-induced surges on outdoor-facing ports per ITU-T K.20/K.21. IC Role / Device Role: First-stage protector in multi-tiered architecture - paired with GDT and filter components. Use Value: UL 497B recognition (QVGQ2) validates compliance for telecom infrastructure deployments requiring certified protectors. |
Use Scenario: Suppressing differential-mode surges on AC-DC adapter primary-side rectifier outputs feeding SMPS controllers. IC Role / Device Role: Secondary surge clamp after MOV, handling fast-rising transients that bypass bulk suppression. Use Value: Fast response time and low incremental surge resistance minimize voltage overshoot, improving reliability of 650 V MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Lower PPPM (600 W), same VBR range (8.5–9.4 V), SMB package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for automotive load-dump or industrial 1500 W requirements | Select when board space is constrained and surge energy is <600 W - verify thermal derating on 0.25″² pads |
| 1.5KE9.1CA | Same 1500 W rating but axial DO-201 package; higher RθJA (~100 °C/W); no AEC-Q101 qualification | Not suitable for automated SMT lines or automotive underhood environments requiring vibration resistance and reflow compatibility | Choose only for through-hole prototyping or legacy designs where SMT is unavailable - avoid for production automotive |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the 1.5SMC9.1CAHE3/9AT uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W capability - making it the only option validated for high-reliability automotive and industrial SMT production where both surge robustness and process compliance are mandatory.
Availability
1.5SMC9.1CAHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom line card development requiring stable component supply, AEC-Q101 traceability, and SMC package consistency.
Supply support for 1.5SMC9.1CAHE3/9AT 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - emphasizing AEC-Q101 compliance, high pulse power density, and UL-recognized telecom safety certification.
FAQ
What does the "HE3" suffix indicate in 1.5SMC9.1CAHE3/9AT?
The "HE3" suffix in 1.5SMC9.1CAHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification for automotive applications. This includes validation for temperature cycling, highly accelerated life testing (HALT), and electrostatic discharge per AEC specification - distinct from commercial-grade "E3" variants. The 1.5SMC9.1CAHE3/9AT is explicitly listed in Vishay's automotive ordering code documentation as qualified for underhood use.
Is 1.5SMC9.1CAHE3/9AT bidirectional, and how is polarity identified?
Yes, 1.5SMC9.1CAHE3/9AT is a bidirectional TVS diode - its CA suffix confirms symmetrical clamping in both directions, with identical VBR, VWM, and VC parameters for positive and negative transients. As stated in the Vishay datasheet, bidirectional types have no marking; the device has no cathode band and may be mounted in either orientation. This eliminates orientation errors during automated placement.
What is the maximum clamping voltage of 1.5SMC9.1CAHE3/9AT at rated peak pulse current?
The maximum clamping voltage (VC) of 1.5SMC9.1CAHE3/9AT is 13.4 V at 112 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of the Vishay 88303 datasheet and represents the upper limit of voltage let-through during worst-case surge events - critical for ensuring downstream 3.3 V or 5 V ICs remain within absolute maximum ratings.
Does 1.5SMC9.1CAHE3/9AT meet UL safety standards for telecom applications?
Yes, 1.5SMC9.1CAHE3/9AT carries Underwriters Laboratories recognition under UL 497B (QVGQ2 file E136766) for protector classification in telecommunications equipment. This certification applies to both unidirectional and bidirectional devices in the 1.5SMC Series and confirms compliance with surge withstand, flammability (UL 94 V-0), and electrical isolation requirements specific to telecom line protection.
What is the thermal resistance and recommended PCB layout for 1.5SMC9.1CAHE3/9AT?
The 1.5SMC9.1CAHE3/9AT 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, as specified in the Vishay datasheet. For optimal thermal performance, use minimum pad dimensions matching the SMC outline, avoid thermal reliefs on pads, and ensure ≥1 oz copper weight. Derating curves in Figure 2 apply above TA = 25 °C.
1.5SMC9.1CAHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC9.1CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC9.1CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1CAHE3/9AT 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 1.5SMC9.1CAHE3/9AT reliable?
The price and inventory of 1.5SMC9.1CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1CAHE3/9AT?
1.5SMC9.1CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1CAHE3/9AT 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 1.5SMC9.1CAHE3/9AT?
For technical support, including 1.5SMC9.1CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC9.1CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1CAHE3/9AT 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 1.5SMC9.1CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1CAHE3/9AT?
All 1.5SMC9.1CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1CAHE3/9AT, 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 1.5SMC9.1CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC9.1CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1CAHE3/9AT Tags
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