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Vishay General Semiconductor - Diodes Division 1.5KE91CAHE3_B/C
- Part No.:
- 1.5KE91CAHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91CAHE3_B/C.pdf
- Description:
- 1.5KW,91V 5%,BIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,530
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Product details
Overview
1.5KE91CAHE3_B/C from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 125 V at 12.0 A, 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 in industrial and automotive systems.
For engineers reviewing the 1.5KE91CAHE3_B/C datasheet, 1.5KE91CAHE3_B/C pinout, 1.5KE91CAHE3_B/C application, or 1.5KE91CAHE3_B/C equivalent, this device delivers verified bidirectional clamping performance, AEC-Q101 qualification (HE3 suffix), RoHS-compliant matte tin plating, and UL 94 V-0 molded epoxy packaging - critical for robust ESD and surge immunity design in safety-critical embedded electronics.
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.
It sustains 1500 W peak pulse power per 10/1000 µs waveform with 0.01% duty cycle, derates linearly above 25 °C ambient, and exhibits a temperature coefficient of VBR at +0.106 %/°C - enabling stable clamping across wide thermal operating ranges in unregulated environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 77.8 V - maximum continuous working voltage before leakage exceeds 1.0 µA, ensuring no false triggering during normal operation |
| VC @ IPPM | 125 V at 12.0 A - actual clamped voltage seen by protected circuit during full-rated 1500 W transient |
| PPPM | 1500 W - peak surge energy absorption capability using standard 10/1000 µs test waveform |
| TJ range | –55 °C to +175 °C - supports under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 rated epoxy body |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads. No polarity marking on bidirectional variants; symmetric terminal function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge conduction path | Either terminal serves as anode or cathode depending on transient polarity - enables placement in AC or floating circuits without orientation concern |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift |
| 1500 W peak pulse rating (10/1000 µs) | Protects downstream components against IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without degradation |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics requiring zero-failure field performance over 15+ year lifetimes |
| UL 94 V-0 flammability rating | Mold compound self-extinguishes within 10 seconds after flame removal - meets safety requirements for enclosed industrial enclosures |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling and humidity, eliminating latent short-circuit risk in high-reliability assemblies |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients up to ±100 V. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rail input prior to DC/DC converter. Use Value: Limits transient voltage to ≤125 V, preventing damage to 36 V-rated input stages while surviving >1000 surges per ISO 7637-2. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on differential signal pair (e.g., RS-485, CAN FD physical layer). Use Value: Sub-ns response ensures clamping occurs before sensitive amplifier inputs saturate or latch up, preserving signal integrity. |
| Telecom AC/DC Adapter Input Stage | Motor Drive Control Board Surge Suppression |
Use Scenario: Safeguarding primary-side rectifier and controller ICs in offline SMPS against lightning-induced surges on AC mains. IC Role / Device Role / Timing Role: Across-line (L–N) bidirectional TVS positioned after MOV but before bridge rectifier. Use Value: Complements MOV by handling fast-rising edge transients (dV/dt > 100 V/ns) that bypass slower varistors, reducing failure rate in UL 62368-1 certified adapters. |
Use Scenario: Protecting gate drivers and isolated feedback optocouplers in variable-frequency drives exposed to back-EMF spikes from inductive loads. IC Role / Device Role / Timing Role: Localized clamp across isolated supply rails (e.g., 15 V gate drive, 5 V logic) on control PCB. Use Value: Maintains functional safety by preventing latch-up in isolated gate drivers during 600 V/µs transients, supporting SIL-2 compliance. |
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), smaller SMB package (surface-mount), higher VC/VBR ratio (1.43 vs. 1.30) | Preferred for space-constrained PCBs where 1500 W rating is not required; lacks AEC-Q101 qualification in standard grade | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 3; verify thermal relief for SMB footprint under repeated surges |
| 1.5KE91CAHE3_A | Same electrical specs and AEC-Q101 qualification; differs only in revision code ("A" vs. "B/C") indicating minor process or test update | No functional or application difference - identical use cases and mounting requirements | Choose 1.5KE91CAHE3_B/C for latest production lot with enhanced traceability; "A" version remains fully compatible if legacy stock is available |
Compared with SMBJ90CA, the 1.5KE91CAHE3_B/C delivers 2.5× higher surge energy handling and proven automotive qualification, while the 1.5KE91CAHE3_A offers identical performance with earlier revision status - making the B/C variant optimal for new designs requiring latest reliability validation and long-term supply continuity.
Availability
1.5KE91CAHE3_B/C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom AC adapter surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE91CAHE3_B/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 robustness, repeatable clamping, and qualification to AEC-Q101 and UL safety standards.
FAQ
What is the clamping voltage of the 1.5KE91CAHE3_B/C at its rated peak pulse current?
The 1.5KE91CAHE3_B/C clamps to a maximum of 125 V at its rated peak pulse current of 12.0 A (10/1000 µs waveform). This value is measured under standardized test conditions and represents the upper limit of voltage imposed on protected circuitry during a full 1500 W transient event. Designers must ensure downstream components tolerate this clamped voltage under worst-case surge conditions.
Is the 1.5KE91CAHE3_B/C suitable for automotive applications?
Yes, the 1.5KE91CAHE3_B/C is AEC-Q101 qualified (per HE3 suffix), making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor modules. Its –55 °C to +175 °C operating range, validated surge endurance, and JESD 201 Class 2 whisker resistance meet stringent automotive reliability requirements for under-hood and chassis-mounted systems.
How does the bidirectional configuration of the 1.5KE91CAHE3_B/C affect its circuit placement?
The bidirectional configuration of the 1.5KE91CAHE3_B/C allows placement across any two nodes subject to differential transients - such as AC power lines, RS-485 buses, or transformer-coupled interfaces - without regard to polarity. Unlike unidirectional TVS diodes, it requires no cathode/anode orientation check during assembly, simplifying layout and eliminating reverse-polarity failure modes in floating or AC-coupled signal paths.
What is the standoff voltage (VWM) of the 1.5KE91CAHE3_B/C, and why does it matter?
The standoff voltage (VWM) of the 1.5KE91CAHE3_B/C is 77.8 V - the maximum continuous DC or RMS voltage the device can withstand without exceeding 1.0 µA leakage current. This parameter ensures the TVS remains non-conductive during normal operation, preventing power loss, heating, or interference with upstream regulators or sensing circuits operating near its clamping threshold.
Does the 1.5KE91CAHE3_B/C require heatsinking in typical applications?
No, the 1.5KE91CAHE3_B/C does not require external heatsinking for single-event surge suppression due to its short-duration (≤1 ms), low-duty-cycle (0.01%) operation. Its thermal resistance (RθJA = 75 °C/W) is sufficient for transient dissipation; however, sustained repetitive surges or elevated ambient temperatures (>75 °C) may necessitate PCB copper pour or lead-length optimization per Figure 5 in the Vishay datasheet 88301.
1.5KE91CAHE3_B/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:
- Active
- 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):
- 12.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- 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_B/C FAQ
1.How can I place an order for 1.5KE91CAHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91CAHE3_B/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_B/C reliable?
The price and inventory of 1.5KE91CAHE3_B/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_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE91CAHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91CAHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91CAHE3_B/C?
1.5KE91CAHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91CAHE3_B/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_B/C?
For technical support, including 1.5KE91CAHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91CAHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE91CAHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE91CAHE3_B/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_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE91CAHE3_B/C?
All 1.5KE91CAHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91CAHE3_B/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_B/C part is unused and in its original packaging.
Return procedure for 1.5KE91CAHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91CAHE3_B/C Tags
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Diodes Incorporated
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