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Vishay General Semiconductor - Diodes Division 1.5KE91CA-E3/51
- Part No.:
- 1.5KE91CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91CA-E3/51.pdf
- Description:
- TVS DIODE 77.8VWM 125VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,970
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Product details
Overview
1.5KE91CA-E3/51 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.
For engineers reviewing the 1.5KE91CA-E3/51 datasheet, 1.5KE91CA-E3/51 pinout, 1.5KE91CA-E3/51 application, or 1.5KE91CA-E3/51 equivalent, this page delivers verified electrical specs, package dimensions, real-world clamping behavior, thermal derating curves, and direct alternatives for automotive, industrial, and telecom surge protection designs.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its symmetrical clamping characteristic applies equally in both directions, with no polarity marking on the case - unlike unidirectional variants that use a cathode band.
It is rated for 1500 W peak pulse power under JEDEC-standard 10/1000 µs waveform at 0.01% duty cycle, and supports repetitive surge events when thermally managed via its RθJL = 15.4 °C/W junction-to-lead thermal resistance. The device meets UL 497B recognition (QVGQ2) and RoHS compliance per JESD201 Class 1A whisker test (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1 mA - defines reliable conduction onset under transient stress |
| 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 surge, limiting downstream stress |
| PPPM | 1500 W - peak surge power handling capability with 10/1000 µs waveform |
| IPPM | 12 A - peak pulse current corresponding to 1500 W clamping at 125 V |
| TJ range | –55 °C to +175 °C - enables operation in under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package, 0.375" lead length, UL 94 V-0 molded epoxy |
Pinout & Package
1.5KE91CA-E3/51 uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package with no polarity marking - consistent with its bidirectional function. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals behave identically - no cathode band; connects across protected line and ground or differential pair |
| Leads (axial) | Thermal and mechanical interface | 0.375" (9.5 mm) lead length optimized for PCB mounting and heat dissipation; RθJL = 15.4 °C/W |
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 rating | Supports robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without degradation |
| Sub-nanosecond response | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial interface protection per safety-critical surge standards |
| RoHS-compliant E3 suffix | Meets JESD201 Class 1A whisker resistance and 275 °C/10 s solder dip requirements |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and jump-start transients up to ±100 V. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between power rail and chassis ground. Use Value: Limits voltage to ≤125 V during 12 A surge, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Safeguarding 4–20 mA current-loop sensors in factory automation against ESD and cable-induced surges. IC Role / Device Role / Timing Role: Differential-line TVS across signal and return, referenced to local ground. Use Value: Clamps fast-rising transients before they reach precision op-amps or ADC front-ends, maintaining measurement accuracy. |
| Telecom DSL Line Protection | Consumer Appliance Motor Drive |
Use Scenario: Shielding ADSL/VDSL line cards from lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Bidirectional TVS on each line (tip/ring) to ground, compliant with ITU-T K.21 recommendations. Use Value: Withstands 10/1000 µs surges up to 1500 W while maintaining low capacitance (<100 pF), avoiding signal distortion. | Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across motor terminals to absorb energy from flyback voltage spikes during PWM switching. Use Value: Dissipates 1500 W pulses without failure, extending relay and driver MOSFET lifetime in high-cycle applications. |
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), VC = 129 V @ 4.7 A | Better suited for space-constrained PCBs; lower surge margin requires parallel staging for 1500 W equivalence | Select when board area is critical and surge levels are ≤600 W; verify thermal layout for SMB footprint |
| 1.5SMC91CA | Same VBR/VC, identical PPPM, but SMC (DO-214AB) surface-mount package | Requires rework of through-hole layout; offers improved automated assembly but reduced lead thermal mass | Choose for high-volume SMT production where DO-201AD axial insertion is impractical |
Compared with 1.5KE91CA-E3/51, SMBJ90CA trades surge capacity for compactness, while 1.5SMC91CA retains full 1500 W capability in a surface-mount form - both require layout changes and do not offer drop-in replacement without mechanical or thermal redesign.
Availability
1.5KE91CA-E3/51 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line card surge mitigation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1.5KE91CA-E3/51 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 handling, and AEC-Q qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and infrastructure applications where robustness against lightning, load dump, and ESD is non-negotiable.
FAQ
What is the breakdown voltage tolerance for 1.5KE91CA-E3/51?
The 1.5KE91CA-E3/51 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 predictable clamping onset across production lots and temperature extremes, critical for coordinating with downstream overvoltage protection thresholds in systems using the 1.5KE91CA-E3/51.
Is 1.5KE91CA-E3/51 suitable for automotive under-hood applications?
Yes, the 1.5KE91CA-E3/51 operates from –55 °C to +175 °C and is available in AEC-Q101-qualified versions (e.g., 1.5KE91CAHE3_B). Its glass-passivated junction, UL 497B recognition, and 1500 W surge rating make it appropriate for protecting engine control modules, body controllers, and power distribution units exposed to load dump and ISO 7637-2 pulses - provided thermal design accounts for RθJL = 15.4 °C/W.
How does the clamping voltage of 1.5KE91CA-E3/51 compare to its breakdown voltage?
The 1.5KE91CA-E3/51 clamps at 125 V when subjected to its full 12 A peak pulse current (IPPM), which is ~30% above its minimum breakdown voltage of 86.5 V. This VC/VBR ratio of ~1.45 reflects low dynamic impedance and effective energy absorption - ensuring protected circuits see minimal overvoltage during worst-case transients, a key performance differentiator of the 1.5KE91CA-E3/51 versus higher-clamp alternatives.
Can 1.5KE91CA-E3/51 be used in AC line protection?
No - the 1.5KE91CA-E3/51 is not rated for continuous AC line voltage applications. Its 77.8 V stand-off voltage (VWM) is insufficient for 120 VAC or 230 VAC RMS systems, where peak voltages exceed 170 V and 325 V respectively. Using the 1.5KE91CA-E3/51 on AC mains would cause premature conduction and failure; dedicated AC-rated TVS or MOV solutions are required instead.
What is the lead finish and solderability specification for 1.5KE91CA-E3/51?
The 1.5KE91CA-E3/51 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. The E3 suffix confirms it passes JESD 201 Class 1A whisker testing and withstands solder dip at 275 °C for up to 10 seconds - ensuring reliable through-hole assembly and long-term interconnect integrity in high-reliability 1.5KE91CA-E3/51 deployments.
1.5KE91CA-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE91CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91CA-E3/51 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-E3/51 reliable?
The price and inventory of 1.5KE91CA-E3/51 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-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE91CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91CA-E3/51?
1.5KE91CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91CA-E3/51 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-E3/51?
For technical support, including 1.5KE91CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE91CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91CA-E3/51 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-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE91CA-E3/51?
All 1.5KE91CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91CA-E3/51, 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-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE91CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91CA-E3/51 Tags
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