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Taiwan Semiconductor Corporation 1.5KE91A
- Part No.:
- 1.5KE91A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91A.pdf
- Description:
- TVS 1500W 91V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:5,177
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Product details
Overview
1.5KE91A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 91V, working stand-off voltage of 77.8V, clamping voltage of 125V at 12.6A, and DO-201 package. It delivers sub-nanosecond response to ESD and lightning-induced transients in automotive power rails and industrial I/O protection.
For engineers reviewing the 1.5KE91A datasheet, 1.5KE91A pinout, 1.5KE91A application, or 1.5KE91A equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, peak pulse current capability under ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms, thermal derating above 25°C ambient, and AEC-Q101 qualification status for automotive use.
Technical Context
The 1.5KE91A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified VBR range (86.5–95.5V at 1mA test current). Its low dynamic impedance ensures rapid voltage clamping during 10/1000μs surge events, limiting transient energy delivered to downstream circuitry.
Designed for robustness in harsh environments, it meets ISO 7637-2 immunity requirements and supports steady-state power dissipation up to 5W at 75°C lead temperature. The device features pure tin-plated leads compliant with J-STD-002 solderability and passes JESD 201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 86.5–95.5V - defines precise reverse conduction onset; critical for margining against system overvoltage thresholds |
| VWM | 77.8V - maximum continuous reverse operating voltage; must exceed normal circuit rail voltage to prevent leakage |
| VC @ IPP=12.6A | 125V - clamped voltage during 10/1000μs surge; determines maximum stress on protected IC inputs |
| PPK | 1500W - peak pulse power handling per JEDEC standard; enables protection against high-energy transients |
| IPP | 12.6A - peak impulse current capacity; directly correlates to survivability under ISO 7637-2 Pulse 2b (inductive load dump) |
| TJ max | +175°C - maximum junction temperature; supports operation in under-hood automotive environments |
| Response time | <1.0ps - ultrafast avalanche turn-on; prevents nanosecond-scale ESD pulses from reaching sensitive nodes |
Pinout & Package
Package: DO-201 axial-leaded through-hole package with cathode band marking; 0.090g mass; UL 94V-0 molding compound; designed for PCB mounting with 0.375" (9.5mm) lead length and copper pad area of 16mm × 16mm for thermal derating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / ground reference | Connected to system ground or low-side return; forms current loop during clamping |
| Cathode | Reverse-biased input / protected line connection | Connected to line being protected (e.g., 24V supply rail); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring reliability under thermal cycling and vibration |
| 1500W surge rating | Withstands single-event 10/1000μs transients up to 1500W without degradation-meets ISO 7637-2 Pulse 1 (capacitive coupling) and Pulse 2b (load dump) |
| Clamping voltage = 125V @ 12.6A | Provides 34V headroom below typical 160V automotive load-dump limits, enabling safe protection of 100V-rated MOSFETs and gate drivers |
| Leakage current <1μA @ 77.8V | Minimizes standby power loss and avoids false triggering in high-impedance sensing circuits |
| DO-201 mechanical robustness | UL 94V-0 flammability rating and JESD 201 Class 2 whisker resistance ensure long-term reliability in industrial control panels and transportation systems |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Suppresses load-dump transients on 24V battery-fed ECUs in commercial vehicles per ISO 7637-2 Pulse 2b. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V rail and chassis ground to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Limits peak voltage to 125V during 12.6A transients, preserving 100V-input regulators and preventing latch-up in CAN transceivers. | Use Scenario: Shields 24V digital input channels of programmable logic controllers from field-wiring induced surges and EFT bursts. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, absorbing fast-rising noise from solenoid switching and motor contactors. Use Value: Sub-1ps response prevents >100ns glitches from propagating into isolation barriers, maintaining signal integrity and reducing firmware debounce overhead. |
| LED Driver Overvoltage Clamp | Telecom Line Interface Surge Suppression |
Use Scenario: Protects constant-current LED driver ICs in streetlight systems from induced lightning surges on long outdoor wiring runs. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output terminals to limit voltage excursion during differential-mode transients. Use Value: Clamps to 125V within 1ps, preventing dielectric breakdown in 100V-rated external FETs and sustaining >1500W surge survival per ANSI C62.41. | Use Scenario: Safeguards RS-485 transceivers in building automation networks exposed to AC mains-coupled surges via shared conduit routing. IC Role / Device Role / Timing Role: Unidirectional suppressor on VCC rail of isolated data interface modules, shunting common-mode energy to earth ground. Use Value: 77.8V working voltage accommodates 24V nominal supply with 20% tolerance while rejecting <1μA leakage at full rated voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | 600W rating, SMC package, VBR = 100–111V, VC = 146V @ 4.1A | Lower power handling and higher clamping voltage reduce margin for ISO 7637-2 Pulse 2b compliance | Select when board space constraints favor surface-mount and surge energy is limited to ≤600W |
| 1N6294A | Same electrical specs and DO-201 package; JEDEC type number for 1.5KE91A per manufacturer cross-reference | No functional or mechanical difference; identical qualification and marking | Direct JEDEC-equivalent part number-interchangeable in all designs without requalification |
Compared with SMBJ90A, the 1.5KE91A provides 2.5× higher surge power rating and 21V lower clamping voltage at rated current, enabling robust protection in automotive and industrial 24V systems; versus 1N6294A, it is functionally identical with no design impact.
Availability
1.5KE91A is available at Aetrix Electronics and suitable for automotive ECU power rail protection, industrial PLC input conditioning, and LED driver overvoltage clamping requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE91A 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 MOSFETs for automotive, industrial, and consumer markets.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for thermal and mechanical reliability.
FAQ
What is the breakdown voltage range for the 1.5KE91A?
The 1.5KE91A has a guaranteed breakdown voltage range of 86.5V to 95.5V at a test current of 1mA, measured per JEDEC standard. This tight VBR window ensures predictable clamping behavior across temperature and production lots, making the 1.5KE91A suitable for precision overvoltage protection where margining against 100V system rails is critical.
Is the 1.5KE91A AEC-Q101 qualified?
Yes, the 1.5KE91A is AEC-Q101 qualified when ordered with the "H" suffix (e.g., 1.5KE91AH), confirming validation for automotive applications including thermal cycling, humidity bias, and mechanical shock testing. Standard 1.5KE91A parts meet industrial reliability standards but require verification for automotive deployment unless explicitly marked with AEC-Q101 certification.
What is the clamping voltage of the 1.5KE91A at its rated peak current?
The 1.5KE91A clamps to a maximum of 125V at its rated peak impulse current of 12.6A under the standard 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events, directly informing system-level overvoltage tolerance design.
Can the 1.5KE91A be used in bidirectional configurations?
No, the 1.5KE91A is a unidirectional TVS diode and must not be used for bidirectional surge suppression. For bipolar applications, Taiwan Semiconductor specifies CA-suffixed parts (e.g., 1.5KE91CA) with symmetrical breakdown characteristics in both directions; using the 1.5KE91A in reverse-biased AC paths risks catastrophic failure due to lack of forward conduction rating.
What package type does the 1.5KE91A use and what are its thermal limitations?
The 1.5KE91A uses the DO-201 axial-leaded package with pure tin-plated leads. Its steady-state power dissipation is rated at 5W at 75°C lead temperature when mounted on a 16mm × 16mm copper pad; derating is required above 25°C ambient per Figure 2 in the datasheet, and maximum junction temperature is +175°C.
1.5KE91A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12.6A
- 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:
- DO-201
1.5KE91A FAQ
1.How can I place an order for 1.5KE91A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91A 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 1.5KE91A reliable?
The price and inventory of 1.5KE91A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91A is usually 5 days.
3.What payment methods are accepted for 1.5KE91A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91A?
1.5KE91A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91A 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 1.5KE91A?
For technical support, including 1.5KE91A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91A requirements.
6.How does Aetrix verify that 1.5KE91A is sourced from the original manufacturer or authorized distributors?
All 1.5KE91A 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 1.5KE91A meets industry standards.
7.What is the process for return or replacement of 1.5KE91A?
All 1.5KE91A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91A, 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 1.5KE91A part is unused and in its original packaging.
Return procedure for 1.5KE91A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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