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Vishay General Semiconductor - Diodes Division 1.5SMC91CAHE3/9AT
- Part No.:
- 1.5SMC91CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAHE3/9AT.pdf
- Description:
- TVS DIODE 77.8VWM 125VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,994
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Product details
Overview
1.5SMC91CAHE3/9AT 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 91 V breakdown voltage (VBR = 86.5–95.5 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 125 V at 12 A, and operates across –65 °C to +150 °C. It is AEC-Q101 qualified and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC91CAHE3/9AT datasheet, 1.5SMC91CAHE3/9AT pinout, 1.5SMC91CAHE3/9AT application, or 1.5SMC91CAHE3/9AT equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge, thermal resistance (RθJA = 75 °C/W), and direct alternatives with documented differences in standoff voltage and qualification status.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response (<1 ps), low incremental surge resistance, and stable clamping across both polarities. Its DO-214AB (SMC) package supports automated placement and meets MSL Level 1 (260 °C peak reflow).
It is rated for 1500 W peak pulse power per 10/1000 µs waveform at TA = 25 °C, derated linearly above 25 °C per Fig. 2, with maximum junction temperature of 150 °C and thermal resistance RθJL = 15 °C/W to leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1 mA - defines reliable conduction onset under bidirectional transients |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 125 V at 12 A - clamped voltage during full 1500 W surge, limiting downstream stress |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, 0.01% duty cycle |
| IPPM | 12 A - peak pulse current corresponding to VC = 125 V and PPPM = 1500 W |
| TJ max. | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on transient polarity; no band marking required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under humidity and bias stress |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without preconditioning or baking |
| 1500 W surge capability | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω/12 Ω source impedance networks |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes protected circuit overvoltage margin while maintaining robust energy absorption |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across supply rails or signal pairs to shunt transient energy before it reaches sensitive IC inputs. Use Value: Maintains VWM = 77.8 V compatibility with 12 V automotive systems while clamping to 125 V - within safe operating area of 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, working in coordination with series current-limiting resistors and optocouplers. Use Value: Delivers 1500 W pulse handling without degradation after repeated 10/1000 µs events - extends system uptime in factory automation environments. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Secondary-level protection on Ethernet PHY power rails and auxiliary bias supplies in base station line cards. IC Role / Device Role / Timing Role: Fast-response TVS placed downstream of primary GDT/MOV stages to capture residual ringwave and combination wave transients. Use Value: Clamps to 125 V within <1 ps, limiting let-through energy to sub-mJ levels - preserves integrity of PMICs and level shifters. |
Use Scenario: Input-stage transient suppression on AC-DC adapter secondary-side outputs (e.g., 12 V/19 V rails). IC Role / Device Role / Timing Role: Bidirectional clamp across output terminals to absorb coupling-induced surges from shared mains wiring or nearby switching loads. Use Value: RoHS-compliant and halogen-free (HE3 suffix), meeting IEC 62368-1 Annex D requirements for limited combustibility and fire propagation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Lower PPPM = 600 W; same VBR range (85.5–94.5 V); SMB package (smaller footprint, higher RθJA) | Not AEC-Q101 qualified; suitable for cost-sensitive consumer designs with lower surge exposure | Select when board space is constrained and 600 W surge rating suffices; verify thermal margin with RθJA = 110 °C/W |
| 1.5KE91CA | Through-hole DO-201 package; identical VBR, VC, and PPPM; no AEC-Q101 option available | Limited to legacy or high-reliability through-hole assemblies; not compatible with SMT production | Choose only for prototyping or repair of existing through-hole boards; avoid for new automotive or high-volume SMT designs |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CAHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC surface-mount packaging - enabling drop-in use in automotive ECUs and industrial controllers where reliability, power handling, and assembly scalability are jointly critical.
Availability
1.5SMC91CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom line card protection, and consumer power adapter designs requiring stable component supply and AEC-Q101 compliance.
Supply support for 1.5SMC91CAHE3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, surge robustness, and qualification-grade consistency are mandatory.
FAQ
What is the standoff voltage (VWM) of the 1.5SMC91CAHE3/9AT?
The 1.5SMC91CAHE3/9AT has a maximum reverse standoff voltage VWM of 77.8 V at 25 °C. This value ensures the device remains non-conductive under normal 12 V or 24 V system operation while allowing rapid transition into clamping mode during transients exceeding this threshold. The 1.5SMC91CAHE3/9AT maintains this specification across its full operating temperature range with minimal drift.
Is the 1.5SMC91CAHE3/9AT suitable for automotive applications?
Yes - the 1.5SMC91CAHE3/9AT carries AEC-Q101 qualification (indicated by the "HE3" suffix) and is explicitly rated for automotive use. It meets stress test requirements including temperature cycling, highly accelerated life testing (HALT), and ESD immunity per JESD22 standards. The 1.5SMC91CAHE3/9AT is deployed in engine control units, body electronics, and ADAS sensor modules where sustained reliability under thermal and electrical stress is essential.
What does the "CA" suffix mean in 1.5SMC91CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration: the 1.5SMC91CAHE3/9AT conducts symmetrically in both forward and reverse directions, making it ideal for protecting AC-coupled signals or ungrounded differential lines. Unlike unidirectional variants (e.g., "A" suffix), the 1.5SMC91CAHE3/9AT has no cathode marking and exhibits identical VBR, VC, and leakage characteristics in either polarity.
How does the 1.5SMC91CAHE3/9AT compare to the 1.5SMC91AHE3/9AT?
The 1.5SMC91CAHE3/9AT is bidirectional with symmetrical clamping, whereas the 1.5SMC91AHE3/9AT is unidirectional and features a cathode band marking. Their VBR (86.5–95.5 V), VC (125 V), and PPPM (1500 W) are identical, but the unidirectional version supports forward conduction and has different leakage behavior under positive bias. Use the 1.5SMC91CAHE3/9AT for AC or floating-line protection; choose the 1.5SMC91AHE3/9AT only when DC-biased rail clamping with defined polarity is required.
What is the thermal resistance of the 1.5SMC91CAHE3/9AT?
The 1.5SMC91CAHE3/9AT 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 JEDEC standards. Its junction-to-lead resistance RθJL is 15 °C/W, supporting efficient heat transfer to PCB copper or heatsinking structures. These values are measured under standardized conditions and must be validated in the final layout using thermal simulation or IR imaging for high-duty-cycle applications.
1.5SMC91CAHE3/9AT 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
1.5SMC91CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC91CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAHE3/9AT 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 1.5SMC91CAHE3/9AT reliable?
The price and inventory of 1.5SMC91CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAHE3/9AT?
1.5SMC91CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAHE3/9AT 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 1.5SMC91CAHE3/9AT?
For technical support, including 1.5SMC91CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC91CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAHE3/9AT 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 1.5SMC91CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAHE3/9AT?
All 1.5SMC91CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAHE3/9AT, 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 1.5SMC91CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC91CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CAHE3/9AT Tags
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