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Taiwan Semiconductor Corporation 1.5KE9.1A
- Part No.:
- 1.5KE9.1A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1A.pdf
- Description:
- TVS 1500W 9.1V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:9,187
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Product details
Overview
1.5KE9.1A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 9.1V, VBR = 8.65–9.55V at IT = 1.0mA, VWM = 7.78V, and clamping voltage VC = 13.4V at IPP = 50A - designed for automotive ECU power rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE9.1A datasheet, 1.5KE9.1A pinout, 1.5KE9.1A application, or 1.5KE9.1A equivalent, this page delivers verified electrical parameters, DO-201 package details, clamping performance under 10/1000μs surge, AEC-Q101 qualification status, and direct alternative part comparisons for robust overvoltage design in automotive and industrial systems.
Technical Context
The 1.5KE9.1A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (8.65–9.55V), delivering low dynamic impedance and sub-1ps response to clamp transient energy. It sustains 1500W peak pulse power per 10/1000μs waveform and exhibits <1μA leakage at 10V above VWM.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and complies with ISO 7637-2 immunity standards for load dump and inductive switching events. Its DO-201 axial package supports lead-free soldering per J-STD-002 and passes JESD 201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0mA | 8.65–9.55V - precise breakdown threshold ensuring reliable triggering before downstream IC damage |
| VWM | 7.78V - maximum continuous reverse operating voltage; sets safe margin below VBR for stable DC bias |
| VC @ IPP = 50A | 13.4V - clamped voltage during full-rated 1500W surge; defines worst-case stress on protected circuitry |
| PPK | 1500W - peak pulse power handling at 10/1000μs waveform; enables protection against severe automotive load dump |
| TJ max | +175°C - maximum junction temperature; supports operation in under-hood environments without derating |
| IR @ VWM | <1μA - ultra-low leakage ensures minimal standby current loss in battery-critical systems |
| Response time | <1.0ps - near-instantaneous avalanche turn-on prevents voltage overshoot during fast transients |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; RoHS-compliant, halogen-free molding compound rated UL 94V-0; 0.090g typical weight; pure tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-impedance return | Connected to system ground or low-side reference; carries forward surge current up to 200A (IFSM) |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 12V rail); initiates avalanche conduction when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and mechanical shock |
| ISO 7637-2 compliance | Rated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (switching noise) |
| 1500W 10/1000μs surge rating | Withstands high-energy transients common in 12V vehicle power networks without degradation |
| Low dynamic impedance | Ensures tight VC–VBR spread (ΔV = 4.75V), minimizing voltage overshoot during clamping |
| UL 94V-0 flammability rating | Molding compound self-extinguishes within 10 seconds after flame removal - critical for under-hood safety |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load dump and alternator ripple in 12V vehicle architectures. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12V supply and ground, clamping transients before they reach LDOs or interface ICs. Use Value: Limits peak rail voltage to ≤13.4V during 1500W surges, preventing latch-up or permanent damage to 5V/3.3V logic. | Use Scenario: Shields digital input terminals of programmable logic controllers from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24V DC input channels, absorbing energy from relay coil flyback or ESD events. Use Value: Maintains signal integrity by holding clamped voltage below 13.4V while sustaining 50A impulse current without failure. |
| LED Headlamp Driver Supply | Telecom Power Interface |
Use Scenario: Safeguards buck converter inputs in adaptive LED headlamps exposed to cold-crank and jump-start voltage spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12V input rail upstream of DC-DC controller and gate drivers. Use Value: Enables reliable startup at –40°C to +125°C ambient with no parameter drift beyond ±0.068%/°C VBR tempco. | Use Scenario: Protects PoE-powered device front-end circuits from lightning-induced surges on 48V DC input lines. IC Role / Device Role / Timing Role: Secondary-level TVS on DC input stage, complementing primary MOV-based protection. Use Value: Adds fast-response clamping (<1ps) to limit residual voltage to 13.4V after primary suppression, preserving Ethernet PHY integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Lower PPK = 600W; SMC package; VBR = 10.0–11.1V; VC = 15.4V @ 39A | Not AEC-Q101 qualified; lacks ISO 7637-2 Pulse 2b/3b validation; suited for commercial-grade 24V systems | Select SMBJ9.0A only if 1500W surge headroom is unnecessary and board space constraints favor surface-mount packaging. |
| 1N6270A (same JEDEC type) | Identical electrical specs and DO-201 package; dual-marking variant - functionally identical to 1.5KE9.1A per Taiwan Semiconductor documentation | No functional difference; used interchangeably in BOMs where legacy part numbering is maintained | 1N6270A is a direct form-fit-function replacement with identical thermal, electrical, and mechanical behavior. |
Compared with 1.5KE9.1A, SMBJ9.0A offers smaller footprint but sacrifices 60% peak power handling and automotive qualification; 1N6270A provides identical performance with alternate JEDEC designation - making it a zero-risk drop-in for legacy designs requiring part number continuity.
Availability
1.5KE9.1A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, LED lighting drivers, and telecom power interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KE9.1A 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and bipolar transistors since 1979.
The 1.5KE series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust DO-201 packaging for harsh-environment deployment.
FAQ
What is the clamping voltage of the 1.5KE9.1A under full-rated surge current?
The 1.5KE9.1A clamps to a maximum of 13.4V at IPP = 50A using the standard 10/1000μs double-exponential waveform. This value is measured per JEDEC test conditions and represents the upper bound of voltage seen by downstream circuitry during worst-case transient events - critical for verifying compatibility with 5V or 3.3V logic supply tolerances.
Is the 1.5KE9.1A AEC-Q101 qualified?
Yes, the 1.5KE9.1A is explicitly AEC-Q101 qualified per Taiwan Semiconductor's official documentation and ordering code suffix "A". This certification covers high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing, and mechanical shock - confirming suitability for automotive powertrain and body electronics applications.
What is the working stand-off voltage (VWM) for the 1.5KE9.1A?
The working stand-off voltage VWM for the 1.5KE9.1A is 7.78V. This is the maximum DC or continuous reverse voltage that can be applied without causing significant leakage current (>1μA), establishing the safe operating margin below the 8.65–9.55V breakdown range and enabling use on nominal 6.5–7.5V supply rails.
Does the 1.5KE9.1A meet ISO 7637-2 immunity standards?
Yes, the 1.5KE9.1A is specified to meet ISO 7637-2 for Pulses 1, 2a, 2b, 3a, and 3b - covering key automotive transient threats including inductive load switching, battery disconnection, and capacitive coupling noise. Its 1500W surge rating and sub-1ps response directly address the energy and timing requirements of these standardized waveforms.
What package type does the 1.5KE9.1A use, and what are its key mechanical features?
The 1.5KE9.1A uses the DO-201 axial-leaded package with cathode band marking. Key mechanical features include UL 94V-0 flammability-rated epoxy, pure tin-plated leads compliant with J-STD-002 solderability, JESD 201 Class 2 whisker resistance, and a typical weight of 0.090g - all supporting automated through-hole assembly and under-hood reliability.
1.5KE9.1A 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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 117A
- 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
1.5KE9.1A FAQ
1.How can I place an order for 1.5KE9.1A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1A 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 1.5KE9.1A reliable?
The price and inventory of 1.5KE9.1A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1A is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1A?
1.5KE9.1A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1A 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 1.5KE9.1A?
For technical support, including 1.5KE9.1A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1A requirements.
6.How does Aetrix verify that 1.5KE9.1A is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1A 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 1.5KE9.1A meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1A?
All 1.5KE9.1A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1A, 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 1.5KE9.1A part is unused and in its original packaging.
Return procedure for 1.5KE9.1A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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