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Taiwan Semiconductor Corporation 1.5KE91C
- Part No.:
- 1.5KE91C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91C.pdf
- Description:
- 1500W, 91V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,704
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Product details
Overview
1.5KE91C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 91V, working stand-off voltage 73.7V, clamping voltage 131V at 12A peak pulse current, and junction temperature rating up to +175°C. It protects automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE91C datasheet, 1.5KE91C pinout, 1.5KE91C application, or 1.5KE91C equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, and real-world use cases in automotive ECU power protection and industrial sensor interface hardening.
Technical Context
The 1.5KE91C operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 81.9–100V breakdown range (tested at 1.0mA). Its low dynamic impedance ensures rapid clamping response-typically <1.0ps from 0V to VBR-and limits transient energy dissipation across sensitive downstream circuitry.
It sustains 1500W non-repetitive peak pulse power per 10/1000μs waveform, with maximum clamping voltage of 131V at 12A IPP, and leakage current <1μA above 10V. The device meets ISO 7637-2 immunity requirements for automotive electronics and supports operation from −55°C to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1.0mA | 81.9–100V: Ensures reliable turn-on before system overvoltage damages downstream ICs |
| VWM | 73.7V: Maximum continuous reverse operating voltage without significant leakage |
| VC @ IPP=12A | 131V: Clamped voltage during 10/1000μs surge-defines protected circuit's max stress level |
| PPK | 1500W: Peak surge power handling capability under standardized transient waveform |
| IPP Max | 12A: Maximum non-repetitive peak impulse current the device can safely divert |
| Junction Temp Range | −55°C to +175°C: Enables deployment in under-hood automotive and high-temp industrial environments |
| Leakage @ VWM | <1μA: Minimizes standby power loss and avoids false triggering in low-power systems |
Pinout & Package
Package: DO-201 axial leaded plastic package with cathode band marking; RoHS-compliant, halogen-free molding compound; UL 94V-0 rated; pure tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-side reference | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Transient voltage sensing & clamping node | Connected to protected line (e.g., 12V battery rail); conducts when VKA > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| 10/1000μs surge rating | 1500W peak power handling per ISO 7637-2 standard transient waveforms |
| Clamping speed | Typically <1.0ps response from 0V to VBR, minimizing voltage overshoot during fast transients |
| Low leakage | <1μA at 73.7V enables use in always-on automotive modules without battery drain concerns |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD coupling) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12V supply lines in engine control units (ECUs) from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before they reach PMIC or microcontroller. Use Value: Limits clamped voltage to 131V, ensuring downstream 36V-rated DC-DC converters remain within safe operating area during ISO 7637-2 Pulse 1 events. |
Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) in PLC I/O modules from EFT and cable-coupled noise. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients (<1ns rise time) before signal conditioning amplifiers. Use Value: Sub-1.0ps response prevents transient propagation into µV-level measurement circuits, preserving ADC accuracy and reducing need for additional filtering. |
| Lighting System Surge Suppression | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding LED driver ICs in automotive headlamps against inductive switching spikes from relay or MOSFET control. IC Role / Device Role / Timing Role: Unidirectional 1.5KE91C placed across driver VCC and GND to absorb 100V+ spikes generated by coil de-energization. Use Value: Withstands 1500W surges and clamps to 131V, preventing latch-up or gate oxide damage in 80V-rated driver ICs. |
Use Scenario: Protecting high-side gate driver ICs in BLDC motor inverters from cross-conduction-induced shoot-through transients. IC Role / Device Role / Timing Role: TVS installed between gate driver output and power MOSFET source to clamp Miller-induced voltage spikes during switching transitions. Use Value: Fast <1.0ps turn-on prevents false triggering of gate drivers, maintaining precise PWM timing and avoiding destructive short-circuit conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ90A | DO-214AC (SMA) package; 90V VWM; 14.3A IPP; 135V VC; 400W PPK | Lower surge rating suits consumer-grade I/O; not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary |
| ON Semiconductor 1.5SMC91CA | DO-214AB (SMC) package; bidirectional; 91V VBR; 12.1A IPP; 137V VC; 1500W PPK | Bidirectional conduction required for AC-coupled or floating signal lines | Choose only if bipolar protection is needed; otherwise 1.5KE91C offers superior unidirectional leakage and cost efficiency |
Compared with SMAJ90A, the 1.5KE91C delivers 3.75× higher surge power handling and AEC-Q101 validation for automotive use; versus 1.5SMC91CA, it provides lower leakage and optimized unidirectional clamping for DC power rail protection-without sacrificing peak power rating.
Availability
1.5KE91C is available at Aetrix Electronics and suitable for automotive ECU power protection, industrial sensor interface hardening, lighting system surge suppression, and motor drive gate driver protection requiring stable component supply and long-term lifecycle continuity.
Supply support for 1.5KE91C 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and thyristors for automotive, industrial, and computing markets.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh-environment applications-emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for under-hood and factory-floor deployment.
FAQ
What is the breakdown voltage range of the 1.5KE91C?
The 1.5KE91C has a guaranteed breakdown voltage (VBR) range of 81.9V to 100V at 1.0mA test current, per JEDEC specification. This range ensures consistent clamping behavior across production lots and allows design margin for worst-case overvoltage scenarios in automotive and industrial systems where the 1.5KE91C is deployed.
Is the 1.5KE91C AEC-Q101 qualified?
Yes, the 1.5KE91C is AEC-Q101 qualified-confirmed in Taiwan Semiconductor's official documentation. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock, validating its suitability for automotive powertrain and body electronics where the 1.5KE91C serves as primary transient protection.
What is the clamping voltage of the 1.5KE91C at its rated peak pulse current?
The 1.5KE91C clamps to a maximum of 131V at 12A peak pulse current (IPP) under the standard 10/1000μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring compatibility with downstream components' absolute maximum ratings in designs using the 1.5KE91C.
Does the 1.5KE91C have bidirectional capability?
No, the 1.5KE91C is a unidirectional TVS diode-its cathode band marking indicates polarity-sensitive installation. It conducts only during reverse-biased overvoltage events. For bidirectional protection, Taiwan Semiconductor offers the 1.5KE91CA variant; the 1.5KE91C must be oriented correctly in-circuit to function as intended.
What package type does the 1.5KE91C use, and what are its key mechanical features?
The 1.5KE91C uses the DO-201 axial-leaded package with cathode band marking, UL 94V-0 flammability-rated molding compound, pure tin-plated leads compliant with J-STD-002, and passes JESD201 Class 2 whisker testing. Its 0.090g weight and standardized lead spacing support automated insertion and reflow-compatible hand-soldering in high-reliability assemblies using the 1.5KE91C.
1.5KE91C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 12A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE91C FAQ
1.How can I place an order for 1.5KE91C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91C 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 reliable?
The price and inventory of 1.5KE91C 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 is usually 5 days.
3.What payment methods are accepted for 1.5KE91C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91C?
1.5KE91C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91C 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?
For technical support, including 1.5KE91C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91C requirements.
6.How does Aetrix verify that 1.5KE91C is sourced from the original manufacturer or authorized distributors?
All 1.5KE91C 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 meets industry standards.
7.What is the process for return or replacement of 1.5KE91C?
All 1.5KE91C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91C, 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 part is unused and in its original packaging.
Return procedure for 1.5KE91C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91C Tags
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