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Vishay General Semiconductor - Diodes Division 1.5KE91CA-E3/54
- Part No.:
- 1.5KE91CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91CA-E3/54.pdf
- Description:
- TVS DIODE 77.8VWM 125VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,532
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Product details
Overview
1.5KE91CA-E3/54 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 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 junction temperature. It protects MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching spikes in automotive and industrial power supplies.
For engineers reviewing the 1.5KE91CA-E3/54 datasheet, 1.5KE91CA-E3/54 pinout, 1.5KE91CA-E3/54 application, or 1.5KE91CA-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and direct alternatives with documented VWM, VC, and IPPM differences.
Technical Context
This device implements an avalanche breakdown-based transient suppression mechanism with glass-passivated silicon junction, enabling sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture allows symmetrical clamping in both polarities without polarity marking, supporting AC-coupled lines and differential bus protection.
Rated for 1500 W peak pulse power under 10/1000 µs waveform at 0.01% duty cycle, it sustains 6.5 W steady-state power on infinite heatsink at TL = 75 °C and exhibits 75 °C/W junction-to-ambient thermal resistance. The 1.5KE case provides robust epoxy molding compliant with UL 94 V-0.
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 overvoltage detection |
| VWM | 77.8 V - maximum continuous working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 125 V at 12 A - actual clamped voltage during 1500 W transient, critical for downstream component survivability |
| IPPM | 12 A - peak pulse current capability under standardized 10/1000 µs surge waveform |
| PPPM | 1500 W - energy-handling capacity for short-duration surges without failure |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | JEDEC 1.5KE - axial-leaded, through-hole package with 0.375" lead length, UL 94 V-0 rated epoxy body |
Pinout & Package
1.5KE91CA-E3/54 uses the standard JEDEC 1.5KE axial-leaded package: molded epoxy body over passivated junction, matte tin-plated leads solderable per J-STD-002, RoHS-compliant (E3 suffix), and qualified to JESD 201 Class 1A whisker test. Bidirectional construction means no polarity marking - both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals conduct identically during positive or negative overvoltage events - no cathode band or polarity identification required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., RS-485), and floating sensor inputs without external polarity management |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted with low-inductance layout |
| Sub-nanosecond response | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity in high-speed interfaces |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA at VWM), and long-term reliability under thermal cycling |
| UL 94 V-0 epoxy case | Self-extinguishing housing prevents flame propagation in fault conditions - required for automotive and industrial safety certifications |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller power rails. Use Value: Limits transient voltage to ≤125 V, preventing latch-up or gate oxide rupture in 3.3 V/5 V logic and buck controllers. | Use Scenario: Shielding 4–20 mA current loop transmitters from ESD and field wiring surges in factory automation. IC Role / Device Role: Bidirectional shunt protector across loop terminals, absorbing ±2 kV contact ESD (IEC 61000-4-2) and inductive kickback. Use Value: Maintains loop accuracy by limiting leakage to <1 µA at 77.8 V, avoiding false zero-span shifts during normal operation. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding DSL/VDSL line interface ICs against lightning-induced surges on twisted-pair copper lines. IC Role / Device Role: First-stage protector in hybrid protection circuit (with gas discharge tube and series impedance). Use Value: Clamps common-mode surges to 125 V before secondary protection stages engage - reduces stress on downstream GDT and filter components. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role: Across-motor terminals to clamp inductive turn-off transients exceeding 100 V. Use Value: Prevents MOSFET drain-source breakdown by limiting spike amplitude to 125 V while handling 12 A peak current without degradation. |
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 = 123 V @ 4.9 A | Not suitable for 1500 W surge requirements; limited to board-level ESD and lower-energy transients | Select when space-constrained PCB layout demands SMT and surge levels stay below IEC 61000-4-5 Level 2 |
| 1.5KE91A-E3/54 | Unidirectional variant; same VBR, VC, and PPPM, but includes cathode band marking and forward voltage drop (VF = 3.5 V) | Requires polarity-aware placement; unsuitable for AC or floating differential signals | Choose only for DC rail protection where reverse blocking is needed and polarity is fixed |
Compared with 1.5KE91CA-E3/54, SMBJ90CA trades surge capacity for compactness and ease of automated assembly, while 1.5KE91A-E3/54 offers identical clamping performance but mandates correct orientation - making the CA version uniquely suited for polarity-agnostic, high-energy AC-coupled protection.
Availability
1.5KE91CA-E3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom line card surge protection, and consumer appliance motor drive inputs requiring stable component supply and long-term lifecycle continuity.
Supply support for 1.5KE91CA-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE family targets high-energy transient suppression in harsh environments, delivering 1500 W pulse capability in a rugged axial-leaded package optimized for industrial, automotive, and telecom infrastructure applications.
FAQ
What is the breakdown voltage tolerance for 1.5KE91CA-E3/54?
The 1.5KE91CA-E3/54 has a specified breakdown voltage range of 86.5 V to 95.5 V at 1 mA test current, representing a ±5% tolerance around the nominal 91 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable overvoltage threshold design in safety-critical circuits. The value is measured per JEDEC standards and confirmed in Vishay's 88301 datasheet revision 09-Aug-2022.
Is 1.5KE91CA-E3/54 RoHS compliant and lead-free?
Yes, 1.5KE91CA-E3/54 is RoHS compliant and lead-free, as indicated by the "E3" suffix in its part number. The matte tin-plated leads meet J-STD-002 solderability requirements, and the device passes JESD 201 Class 1A whisker testing. It conforms to material categorization guidelines defined in Vishay document 99912 and carries no exemptions under EU RoHS Directive 2011/65/EU.
What is the maximum clamping voltage of 1.5KE91CA-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE91CA-E3/54 is 125 V at 12 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across the operating temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. It is directly referenced in Table 1 of Vishay document 88301.
Can 1.5KE91CA-E3/54 be used in AC line protection applications?
Yes, 1.5KE91CA-E3/54 is explicitly designed for bidirectional applications and is suitable for AC line protection, including phase-neutral and phase-phase surge suppression in 100–240 VAC systems. Its symmetrical VBR and VC characteristics ensure equal clamping in both polarities, eliminating need for back-to-back diode configurations. It is commonly deployed in AC adapter inputs and industrial AC drive controls.
Does 1.5KE91CA-E3/54 have AEC-Q101 qualification?
No, 1.5KE91CA-E3/54 is not AEC-Q101 qualified. Per Vishay document 88301, AEC-Q101 qualification applies only to variants with the "HE3" suffix (e.g., 1.5KE91CAHE3_B). The "E3" suffix denotes commercial-grade RoHS compliance only. For automotive under-hood applications requiring AEC-Q101, engineers must specify the HE3 variant instead of 1.5KE91CA-E3/54.
1.5KE91CA-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:
- 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):
- 12A
- 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
1.5KE91CA-E3/54 FAQ
1.How can I place an order for 1.5KE91CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91CA-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 1.5KE91CA-E3/54 reliable?
The price and inventory of 1.5KE91CA-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 1.5KE91CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE91CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91CA-E3/54?
1.5KE91CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91CA-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 1.5KE91CA-E3/54?
For technical support, including 1.5KE91CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE91CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91CA-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 1.5KE91CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE91CA-E3/54?
All 1.5KE91CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91CA-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 1.5KE91CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE91CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91CA-E3/54 Tags
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