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Vishay General Semiconductor - Diodes Division 1.5KE91AHE3_B/C
- Part No.:
- 1.5KE91AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91AHE3_B/C.pdf
- Description:
- 1.5KW,91V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
1.5KE91AHE3_B/C from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 86.5 V to 95.5 V breakdown voltage (VBR), 77.8 V stand-off voltage (VWM), 125 V maximum clamping voltage (VC) at 12 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE91AHE3_B/C datasheet, 1.5KE91AHE3_B/C pinout, 1.5KE91AHE3_B/C application, or 1.5KE91AHE3_B/C equivalent, this part delivers verified AEC-Q101 qualification, RoHS-compliant matte tin-plated leads, JESD 201 Class 2 whisker resistance, and UL 94 V-0 molded epoxy packaging - critical for high-reliability automotive and industrial transient suppression design-in.
Technical Context
This unidirectional TVS diode uses a glass passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance, enabling effective clamping of fast-rising transients such as ESD, inductive switching spikes, and lightning-induced surges. Its 10/1000 µs waveform rating ensures robustness against repetitive surge events at 0.01% duty cycle.
The device exhibits a temperature coefficient of VBR of +0.106 %/°C and maintains stable clamping performance up to TJ = 175 °C. With RθJA = 75 °C/W and RθJL = 15.4 °C/W, thermal management relies on lead conduction rather than PCB copper area - consistent with axial-leaded Case Style 1.5KE construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines reliable conduction onset under transient stress without false triggering during normal operation. |
| VWM | 77.8 V - maximum continuous reverse working voltage; must exceed system DC rail (e.g., 72 V automotive battery) to prevent leakage or degradation. |
| VC @ IPPM | 125 V at 12.0 A - clamping voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure level. |
| PPPM | 1500 W - peak pulse power handling capability; enables suppression of high-energy transients like ISO 7637-2 Pulse 5a without failure. |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction; supports fault-current limiting in power rail protection. |
| TJ Range | –55 °C to +175 °C - wide operating junction temperature window suitable for under-hood automotive and industrial environments. |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" (9.5 mm) lead length; UL 94 V-0 compliant epoxy body. |
Pinout & Package
1.5KE91AHE3_B/C is housed in a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. The cathode is marked by a color band on the body; polarity must be observed during PCB placement to ensure correct unidirectional clamping orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path when transient exceeds VBR. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 72 V battery rail); color band identifies this end for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Glass passivated junction | Ensures long-term reliability and stable VBR under thermal cycling and humidity exposure. |
| 1500 W peak pulse power (10/1000 µs) | Supports compliance with ISO 16750-2 and ISO 7637-2 transient immunity standards for 12 V/24 V systems. |
| UL 94 V-0 flammability rating | Molded epoxy body resists ignition and flame propagation - required for under-hood and safety-critical enclosures. |
| JESD 201 Class 2 whisker resistance | Matte tin plating prevents tin whisker growth under thermal/humidity stress, eliminating latent short-circuit risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load dump transients (ISO 7637-2 Pulse 5a) on 24 V commercial vehicle battery-fed ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges above 77.8 V before they reach downstream regulators. Use Value: Limits peak voltage to ≤125 V during 1500 W transients, preventing damage to 36 V-rated input stages while maintaining AEC-Q101 qualification. |
Use Scenario: Protecting analog outputs of pressure sensors in factory automation PLC modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to shunt inductive kickback from nearby 24 V solenoid drivers. Use Value: Sub-ns response ensures clamping occurs before 100 ns rise-time transients propagate into ADC front-end, preserving measurement integrity. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered network switches against AC line coupling and lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary TVS on secondary-side 48 V bus, upstream of hot-swap controllers and PMICs. Use Value: 125 V clamping voltage ensures protected ICs see no more than 125 V during 10/1000 µs surges, meeting IEC 61000-4-5 Level 3 requirements. |
Use Scenario: Mitigating back-EMF from brushed DC motors in smart home vacuum cleaners during commutation. IC Role / Device Role / Timing Role: TVS mounted across motor terminals to absorb energy from inductive collapse when H-bridge MOSFETs switch off. Use Value: 200 A IFSM rating handles repeated 8.3 ms half-sine surges without degradation, extending motor driver lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | DO-214AA (SMB) package, 90 V VWM, 143 V VC @ 10.5 A, 600 W PPPM | Lower power rating and surface-mount form factor - suited for space-constrained PCBs but not direct replacement for 1500 W demands. | Select SMBJ90A only when board layout prohibits axial-leaded devices and surge energy is limited to ≤600 W. |
| 1.5KE91A-E3/54 | Same electrical specs and DO-201AD package, but commercial-grade (non-AEC-Q101), reel packaging with code "54" instead of "C". | Lacks automotive qualification; acceptable for industrial/commercial use where AEC-Q101 is not mandated. | Choose 1.5KE91A-E3/54 for cost-sensitive non-automotive designs requiring identical clamping behavior and footprint. |
Compared with SMBJ90A and 1.5KE91A-E3/54, the 1.5KE91AHE3_B/C uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and axial-leaded mechanical robustness - making it the sole option for high-energy automotive load-dump protection where both reliability and power handling are mandatory.
Availability
1.5KE91AHE3_B/C is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE91AHE3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5KE91AHE3_B/C under standard test conditions?
The 1.5KE91AHE3_B/C has a maximum clamping voltage (VC) of 125 V at 12.0 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured per JEDEC standards and reflects the upper limit of voltage seen by downstream circuitry during a defined transient event - critical for ensuring protected ICs remain within their absolute maximum ratings.
Is the 1.5KE91AHE3_B/C qualified for automotive applications?
Yes, the 1.5KE91AHE3_B/C is AEC-Q101 qualified, as confirmed in Vishay document 88301 revision 09-Aug-2022. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics.
What does the "HE3_B/C" suffix indicate in 1.5KE91AHE3_B/C?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker-resistant matte tin plating. "B/C" specifies the packaging variant: 13" diameter paper tape and reel, with base quantity 1400 units per reel and package code "C". This distinguishes it from alternate reel codes like "54" used in commercial-grade versions.
Can the 1.5KE91AHE3_B/C be used in bidirectional configurations?
No, the 1.5KE91AHE3_B/C is strictly unidirectional. Bidirectional variants in the same family use the "CA" suffix (e.g., 1.5KE91CA). Using this part in a bidirectional application would result in improper clamping during negative transients - always verify polarity marking (cathode band) and match device type to circuit topology.
What is the thermal resistance profile of the 1.5KE91AHE3_B/C?
The 1.5KE91AHE3_B/C has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15.4 °C/W. Because it uses axial leads in a DO-201AD package, heat dissipation relies primarily on lead conduction - not PCB copper area - so thermal design must prioritize lead length and mounting to thermally conductive chassis or heatsinks.
1.5KE91AHE3_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:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE91AHE3_B/C FAQ
1.How can I place an order for 1.5KE91AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91AHE3_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 1.5KE91AHE3_B/C reliable?
The price and inventory of 1.5KE91AHE3_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 1.5KE91AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE91AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91AHE3_B/C?
1.5KE91AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91AHE3_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 1.5KE91AHE3_B/C?
For technical support, including 1.5KE91AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE91AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE91AHE3_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 1.5KE91AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE91AHE3_B/C?
All 1.5KE91AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91AHE3_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 1.5KE91AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE91AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91AHE3_B/C Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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