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Vishay General Semiconductor - Diodes Division 1.5KE91HE3/54
- Part No.:
- 1.5KE91HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91HE3/54.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,727
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Product details
Overview
1.5KE91HE3/54 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 maximum standoff voltage (VWM), 125 V clamping voltage at 12 A peak pulse current, 1500 W peak pulse power rating with 10/1000 µs waveform, and operates across -55 °C to +175 °C junction temperature range - deployed in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE91HE3/54 datasheet, 1.5KE91HE3/54 pinout, 1.5KE91HE3/54 application, or 1.5KE91HE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), JEDEC 1.5KE package dimensions, and real-world clamping behavior under transient surge conditions.
Technical Context
This unidirectional TVS diode uses a glass passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR = 86.5–95.5 V and limits voltage to ≤125 V at 12 A IPPM under 10/1000 µs transients, enabling robust protection of downstream MOSFETs and ICs against inductive switching spikes and ESD events.
The device is rated for 200 A non-repetitive forward surge current (IFSM), supports 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C, and exhibits a temperature coefficient of VBR of +0.106 %/°C - critical for stable clamping performance across automotive under-hood temperature excursions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V - defines precise voltage threshold where avalanche conduction initiates to shunt 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 10/1000 µs surge, limiting stress on protected circuitry |
| PPPM | 1500 W - peak transient power handling capability per single 1 ms pulse, derated above 25 °C |
| IFSM | 200 A - withstands 8.3 ms half-sine surge without failure, supporting high-energy inductive load switching |
| TJ max | +175 °C - enables operation in under-hood automotive environments and industrial motor drive enclosures |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance ensures efficient heat transfer to PCB copper pour or heatsink |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with matte tin-plated leads, RoHS-compliant, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.042" (1.07 mm) lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes conduction path during reverse-biased transient suppression |
| Cathode | High-side transient input terminal | Marked by color band; receives surge energy and conducts avalanche current to anode when VRM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics modules |
| 1500 W peak pulse power | Handles high-energy transients from relay coil de-energization, solenoid switching, and load dump events |
| 1 ns response time | Clamps before sensitive ICs experience damaging overvoltage - faster than MOVs or gas discharge tubes |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms compliance with stringent tin whisker mitigation for high-reliability solder joints |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients up to ±35 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary clamping device placed at main power entry point, conducting surge current away from LDOs and microcontrollers. Use Value: Limits voltage to ≤125 V during 12 A surge, preventing latch-up or gate oxide rupture in downstream 3.3 V/5 V logic. |
Use Scenario: Shielding 4–20 mA current loop transmitters from ESD and field wiring surges in factory automation. IC Role / Device Role / Timing Role: Unidirectional shunt element across analog input terminals, activated only during positive overvoltage events. Use Value: Maintains signal integrity below 77.8 V normal operation while clamping >86.5 V transients within 1 ns. |
| DC Motor Drive Flyback Suppression | Telecom Line Interface Protection |
Use Scenario: Absorbing inductive kickback from brushed DC motors in robotics and HVAC actuators. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals, providing low-impedance path for stored inductor energy. Use Value: Dissipates 1500 W peak energy without degradation, enabling compact layout vs. RC snubbers or varistors. |
Use Scenario: Safeguarding Ethernet PHY interfaces and RS-485 transceivers against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage protection on line side of isolation barrier, preceding GDT or secondary TVS array. Use Value: Clamps common-mode transients to <125 V before reaching transformer insulation or integrated transceiver ESD structures. |
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 | Lower PPPM (600 W), smaller SMB package (RθJA = 110 °C/W), same VBR range (85.5–94.5 V) | Better suited for space-constrained PCBs but requires careful thermal design due to higher thermal resistance | Select SMBJ90A when board area is limited and surge energy remains ≤600 W; verify thermal margin with copper pour |
| 1.5KE91A-E3/54 | Same electrical specs and 1.5KE package, but commercial-grade (non-AEC-Q101) and JESD 201 Class 1A whisker rating | Approved for industrial/commercial use only; not validated for automotive temperature cycling or lifetime reliability testing | Choose 1.5KE91A-E3/54 for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMBJ90A and 1.5KE91A-E3/54, the 1.5KE91HE3/54 uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and low RθJL (15.4 °C/W) - making it the preferred choice for automotive power modules and industrial systems requiring both high energy handling and extended temperature reliability.
Availability
1.5KE91HE3/54 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, DC motor drive circuits, and telecom line protection requiring stable component supply and full traceability.
Supply support for 1.5KE91HE3/54 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 infrastructure where failure modes must be mitigated without compromising response speed or thermal stability.
FAQ
What is the clamping voltage of the 1.5KE91HE3/54 under a 10/1000 µs surge?
The 1.5KE91HE3/54 clamps to a maximum of 125 V at its rated peak pulse current of 12 A under a 10/1000 µs waveform. This value is measured per JEDEC standard test conditions and reflects the actual voltage seen by protected components during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5KE91HE3/54 qualified for automotive applications?
Yes, the 1.5KE91HE3/54 is AEC-Q101 qualified, as confirmed in Vishay's official documentation (Document Number 88301, Revision 09-Aug-2022). The HE3 suffix denotes compliance with JESD 201 Class 2 whisker testing and full automotive reliability stress screening, making it suitable for engine control, body electronics, and ADAS power domains.
How does the 1.5KE91HE3/54 differ from the standard 1.5KE91A-E3/54?
The 1.5KE91HE3/54 differs from 1.5KE91A-E3/54 in three key ways: it carries AEC-Q101 qualification, meets JESD 201 Class 2 (vs. Class 1A) tin whisker resistance, and is designated for automotive-grade production. Electrically and dimensionally, both share identical VBR, VWM, VC, and 1.5KE package - but only the HE3 variant is approved for automotive use.
What is the maximum operating temperature for the 1.5KE91HE3/54?
The 1.5KE91HE3/54 has a maximum junction temperature (TJ) of +175 °C and operates across -55 °C to +175 °C. This wide range supports deployment in under-hood automotive locations and industrial enclosures exposed to ambient temperatures exceeding 105 °C, provided PCB thermal design maintains junction temperature within limit.
Can the 1.5KE91HE3/54 be used in bidirectional configurations?
No, the 1.5KE91HE3/54 is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). Bidirectional variants such as 1.5KE91CA exist but are distinct part numbers with symmetrical clamping in both polarities - the 1.5KE91HE3/54 conducts only in reverse bias and must be oriented with cathode toward the protected line.
1.5KE91HE3/54 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 11.5A
- 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
1.5KE91HE3/54 FAQ
1.How can I place an order for 1.5KE91HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91HE3/54 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 1.5KE91HE3/54 reliable?
The price and inventory of 1.5KE91HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE91HE3/54?
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4.How is shipping managed for 1.5KE91HE3/54?
1.5KE91HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91HE3/54 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 1.5KE91HE3/54?
For technical support, including 1.5KE91HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91HE3/54 requirements.
6.How does Aetrix verify that 1.5KE91HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91HE3/54 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 1.5KE91HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE91HE3/54?
All 1.5KE91HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91HE3/54, 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 1.5KE91HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE91HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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