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Vishay General Semiconductor - Diodes Division 1.5KE91CAHE3_A/C
- Part No.:
- 1.5KE91CAHE3_A/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91CAHE3_A/C.pdf
- Description:
- TVS DIODE 77.8VWM 125VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,539
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Product details
Overview
1.5KE91CAHE3_A/C 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, 77.8 V stand-off voltage (VWM), and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE91CAHE3_A/C datasheet, 1.5KE91CAHE3_A/C pinout, 1.5KE91CAHE3_A/C application, or 1.5KE91CAHE3_A/C equivalent, this device delivers verified bidirectional clamping performance with AEC-Q101 qualification (HE3 suffix), RoHS compliance, and JESD 201 Class 2 whisker resistance - critical for automotive, industrial, and telecom surge protection design.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
Rated for 1500 W peak pulse power under 10/1000 µs waveform at 0.01% duty cycle, it sustains 12 A peak pulse current (IPPM) while limiting transient voltage to ≤125 V. Thermal resistance is 15.4 °C/W (junction-to-lead), supporting reliable operation up to TJ = 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1 mA - defines precise clamping onset threshold for bidirectional surge events |
| VWM | 77.8 V - maximum continuous working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 125 V at 12 A - actual clamped voltage during worst-case 1500 W transient, directly limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity validated per REA and ANSI/IEEE C62.35 |
| IPPM | 12 A - maximum non-repetitive surge current the device safely clamps without degradation |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 molding compound |
Pinout & Package
1.5KE91CAHE3_A/C uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. As a bidirectional TVS diode, it has no polarity marking; both terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path terminal | Both ends connect identically to protected line and ground - no cathode band or polarity orientation required |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including high-temperature operating life and mechanical shock resistance |
| 1500 W peak pulse rating | Provides single-device protection against IEC 61000-4-5 Level 4 (4 kV) surges when properly mounted with low-inductance layout |
| JESD 201 Class 2 whisker resistance | Eliminates risk of tin whisker growth in high-reliability applications requiring >10-year field life |
| UL 94 V-0 epoxy body | Meets flame-retardancy requirements for enclosed industrial and telecom enclosures |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and chassis ground to shunt surge energy away from downstream regulators and microcontrollers. Use Value: Clamps 12 V system transients to ≤125 V within <1 ns, preventing latch-up or gate oxide damage in automotive-grade MCUs and CAN transceivers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC I/O modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) TVS placed across differential or single-ended sensor lines to suppress EFT bursts and fast transients. Use Value: Maintains signal integrity by limiting transient overshoot without loading the sensor output, enabling accurate 16-bit ADC readings under noisy factory conditions. |
| Telecom DSL Line Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding ADSL/VDSL line interface circuits from lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary protection device in series with transformer-coupled line interface, coordinated with secondary GDT or MOV stages. Use Value: Withstands repeated 10/1000 µs surges up to 12 A while maintaining VWM = 77.8 V - sufficient margin above 60 V RMS DSL line voltage. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp flyback voltage spikes generated during PWM commutation or sudden shutdown. Use Value: Limits reverse voltage to 125 V, protecting H-bridge MOSFETs rated for 150 V drain-source breakdown and extending MOSFET lifetime by >3× vs. unprotected operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Lower PPPM (600 W), smaller SMB package (surface-mount), VC = 129 V at 4.7 A | Better suited for PCB space-constrained designs; lower surge rating requires parallel staging for 1500 W equivalence | Select when board area is limited and peak surge current remains ≤5 A; verify thermal derating on FR-4 with 2 oz copper |
| 1.5KE91AHE3_A/C | Unidirectional version; same VBR, VWM, and PPPM, but includes cathode band marking and forward conduction path | Required only where DC bias exists and polarity-aware clamping is needed (e.g., DC power rails with defined ground reference) | Choose unidirectional 1.5KE91AHE3_A/C only if circuit topology mandates asymmetric clamping - otherwise bidirectional offers layout flexibility and reduced BOM count |
Compared with SMBJ90CA, 1.5KE91CAHE3_A/C delivers 2.5× higher surge power in a through-hole package ideal for high-energy industrial transients; versus 1.5KE91AHE3_A/C, it eliminates polarity dependency and simplifies placement in AC-coupled or floating systems - making it the preferred choice for universal surge protection where layout symmetry and automotive qualification are priorities.
Availability
1.5KE91CAHE3_A/C is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE91CAHE3_A/C 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 demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing AEC-Q101 qualification, robust thermal performance, and repeatable clamping behavior across temperature and lifetime.
FAQ
What is the clamping voltage of the 1.5KE91CAHE3_A/C under a 10/1000 µs surge?
The 1.5KE91CAHE3_A/C clamps to a maximum of 125 V at 12 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the actual voltage seen by downstream components during worst-case surge events - critical for ensuring MOSFETs, regulators, and interface ICs remain within safe operating limits. The 1.5KE91CAHE3_A/C achieves this with sub-nanosecond response time and low dynamic impedance.
Is the 1.5KE91CAHE3_A/C suitable for automotive applications?
Yes, the 1.5KE91CAHE3_A/C is AEC-Q101 qualified (indicated by the HE3 suffix) and rated for junction temperatures up to +175 °C, making it suitable for under-hood and powertrain applications. It meets automotive surge immunity requirements including ISO 7637-2 and supports long-term reliability under thermal cycling and vibration. The 1.5KE91CAHE3_A/C is commonly deployed in body control modules, ADAS sensor power supplies, and infotainment system I/O protection.
How does the bidirectional configuration of the 1.5KE91CAHE3_A/C affect circuit design?
The bidirectional configuration of the 1.5KE91CAHE3_A/C means both terminals are electrically identical - no cathode marking or polarity orientation is required. This simplifies PCB layout in AC-coupled, floating, or differential signal paths (e.g., RS-485, CAN FD, or telecom lines) and eliminates risk of incorrect installation. Unlike unidirectional variants, the 1.5KE91CAHE3_A/C provides symmetrical clamping regardless of transient polarity, which is essential for protecting balanced interfaces where voltage reversal can occur.
What is the maximum steady-state power dissipation of the 1.5KE91CAHE3_A/C?
The 1.5KE91CAHE3_A/C has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C. In practical through-hole designs on standard FR-4 with 1 oz copper, derating applies: at TA = 70 °C ambient, usable continuous power drops to ~2.1 W. This rating governs leakage-related self-heating during sustained overvoltage - not surge events, which are handled by the 1500 W pulsed capability. Always verify thermal design using RθJA = 75 °C/W and RθJL = 15.4 °C/W.
Does the 1.5KE91CAHE3_A/C require a heatsink for surge protection duty?
No, the 1.5KE91CAHE3_A/C does not require a heatsink for transient suppression duty because its 1500 W peak pulse rating is defined for short-duration (≤1 ms), low-duty-cycle (0.01%) events - energy is dissipated as heat in the silicon junction without significant thermal accumulation. However, for continuous DC leakage current under sustained overvoltage near VWM, thermal management becomes relevant; in such rare cases, minimizing trace length and using wide copper pours improves heat spreading. The 1.5KE91CAHE3_A/C's RθJL = 15.4 °C/W ensures adequate conduction through leads without auxiliary heatsinking.
1.5KE91CAHE3_A/C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE91CAHE3_A/C FAQ
1.How can I place an order for 1.5KE91CAHE3_A/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91CAHE3_A/C 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 1.5KE91CAHE3_A/C reliable?
The price and inventory of 1.5KE91CAHE3_A/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91CAHE3_A/C is usually 5 days.
3.What payment methods are accepted for 1.5KE91CAHE3_A/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91CAHE3_A/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91CAHE3_A/C?
1.5KE91CAHE3_A/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91CAHE3_A/C 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 1.5KE91CAHE3_A/C?
For technical support, including 1.5KE91CAHE3_A/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91CAHE3_A/C requirements.
6.How does Aetrix verify that 1.5KE91CAHE3_A/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE91CAHE3_A/C 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 1.5KE91CAHE3_A/C meets industry standards.
7.What is the process for return or replacement of 1.5KE91CAHE3_A/C?
All 1.5KE91CAHE3_A/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91CAHE3_A/C, 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 1.5KE91CAHE3_A/C part is unused and in its original packaging.
Return procedure for 1.5KE91CAHE3_A/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91CAHE3_A/C Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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