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Vishay General Semiconductor - Diodes Division 1.5KE91C-E3/54
- Part No.:
- 1.5KE91C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91C-E3/54.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,493
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Product details
Overview
1.5KE91C-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in signal and power 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 –55 °C to +175 °C. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE91C-E3/54 datasheet, 1.5KE91C-E3/54 pinout, 1.5KE91C-E3/54 application, or 1.5KE91C-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and direct alternatives for automotive, industrial, and telecom surge protection designs.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, supporting AC-coupled lines and differential interfaces.
It delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and maintains stable clamping up to 175 °C junction temperature. The device meets JESD22-B106 solder dip requirements (275 °C, 10 s) and is RoHS-compliant per E3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1 mA - defines precise voltage threshold where clamping initiates in both directions |
| VWM | 77.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 125 V at 12 A - clamped voltage during full 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - peak surge power handling capability with 10/1000 µs waveform, critical for lightning immunity |
| TJ max. | +175 °C - high-temperature operation enables use in under-hood automotive and industrial power supplies |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance supports reliable power dissipation without heatsink |
| Capacitance | ~100 pF at 0 V (typ.) - minimal signal distortion in data line protection up to ~100 MHz |
Pinout & Package
Package: JEDEC Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, 0.375" lead length standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias | Not used as rectifier; serves as one side of symmetrical bidirectional clamping path |
| Cathode (unmarked end) | Current exit terminal in forward bias | Identical role to anode due to bidirectional construction; no polarity marking on device body |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with low-inductance paths |
| Bidirectional configuration | Protects AC signals, RS-485 buses, and transformer-coupled interfaces without polarity concerns |
| Fast response time < 1 ns | Clamps transients before sensitive ICs experience destructive overvoltage-critical for CMOS/MOSFET gate protection |
| AEC-Q101 qualified option available | HE3 variant supports automotive applications requiring qualification; E3 version is commercial-grade |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply rails in engine control units and body electronics from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between rail and ground, absorbing energy before it reaches DC/DC converters and microcontrollers. Use Value: Limits transient voltage to ≤125 V during 1500 W surges, preventing latch-up or gate oxide rupture in downstream FETs and regulators. |
Use Scenario: Safeguarding analog inputs and digital communication lines (e.g., CAN, RS-485) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance shunt protector across differential pairs or single-ended signal lines, activated within nanoseconds. Use Value: Maintains signal integrity with <100 pF capacitance while clamping ESD and switching noise to safe levels below IC absolute maximum ratings. |
| Telecom DSL Line Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end surge suppression on twisted-pair DSL lines exposed to induced lightning per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary TVS in series with gas discharge tube (GDT) for hybrid protection, handling fast-rising transients before GDT fires. Use Value: Clamps 10/1000 µs surges to 125 V with sub-ns response, enabling coordination with slower secondary protectors and preserving line signal fidelity. |
Use Scenario: Secondary-side overvoltage clamp in AC-DC adapters for smart home devices, guarding against output capacitor failure or feedback loop faults. IC Role / Device Role / Timing Role: Fail-safe crowbar element across regulated 5 V/12 V outputs, triggered only during catastrophic overvoltage events. Use Value: Withstands 175 °C junction temperature and 200 A non-repetitive forward surge, ensuring robustness even during sustained fault conditions. |
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 peak power (600 W), smaller SMB package (vs. axial 1.5KE), higher VC/VBR ratio (1.33 vs. 1.30) | Better suited for space-constrained PCBs; less effective for high-energy lightning surges | Select when board area is limited and surge energy is ≤600 W (e.g., USB port protection) |
| 1.5KE91A-E3/54 | Unidirectional version; identical VBR, VC, and PPPM, but requires correct polarity placement and includes cathode band marking | Applicable only in DC-coupled, polarity-defined circuits (e.g., DC power input); not suitable for AC or differential lines | Choose only if system topology mandates unidirectional clamping and layout allows polarity-aware placement |
Compared with 1.5KE91C-E3/54, SMBJ90CA trades surge capacity for compactness, while 1.5KE91A-E3/54 retains full power rating but sacrifices bidirectional flexibility-making the original optimal for universal AC/DC interface protection where polarity independence and 1500 W headroom are required.
Availability
1.5KE91C-E3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, telecom line interface, and consumer power adapter designs requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE91C-E3/54 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 and ruggedized performance.
The 1.5KE family was engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and infrastructure applications-where consistent clamping and thermal resilience are mandatory.
FAQ
What is the clamping voltage of the 1.5KE91C-E3/54 under maximum surge current?
The 1.5KE91C-E3/54 exhibits a maximum clamping voltage (VC) of 125 V when subjected to its peak pulse current (IPPM) of 12 A, measured using the standardized 10/1000 µs waveform. This value ensures downstream components see voltage limited well below destructive thresholds, and is confirmed in Vishay's datasheet Document Number 88301, Table on page 2.
Is the 1.5KE91C-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE91C-E3/54 carries the E3 suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and it passes JESD 201 Class 1A whisker testing. No lead content is present above threshold limits.
Does the 1.5KE91C-E3/54 have AEC-Q101 qualification?
No-the 1.5KE91C-E3/54 is the commercial-grade variant. AEC-Q101 qualification applies only to the HE3-suffixed versions (e.g., 1.5KE91CHE3_B). The E3/54 part is rated for industrial and telecom use but lacks automotive qualification documentation and test reporting required by AEC-Q101.
How does the bidirectional nature of the 1.5KE91C-E3/54 affect PCB layout?
The 1.5KE91C-E3/54 has no polarity marking and functions identically in either orientation, simplifying layout for AC-coupled or differential traces. Unlike unidirectional TVS diodes, it eliminates risk of reverse installation and supports symmetric placement across lines such as RS-485 A/B or Ethernet pairs-reducing design review iterations and assembly errors.
What is the thermal resistance and maximum operating temperature of the 1.5KE91C-E3/54?
The 1.5KE91C-E3/54 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and a maximum junction temperature (TJ) of +175 °C. This allows direct mounting on copper pours or short traces without heatsinks, supporting reliable operation in high-ambient environments like engine bays or enclosed industrial enclosures.
1.5KE91C-E3/54 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:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE91C-E3/54 FAQ
1.How can I place an order for 1.5KE91C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91C-E3/54 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 1.5KE91C-E3/54 reliable?
The price and inventory of 1.5KE91C-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91C-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE91C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91C-E3/54?
1.5KE91C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91C-E3/54 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 1.5KE91C-E3/54?
For technical support, including 1.5KE91C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91C-E3/54 requirements.
6.How does Aetrix verify that 1.5KE91C-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91C-E3/54 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 1.5KE91C-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE91C-E3/54?
All 1.5KE91C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91C-E3/54, 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 1.5KE91C-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE91C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91C-E3/54 Tags
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