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Taiwan Semiconductor Corporation 1.5KE9.1C
- Part No.:
- 1.5KE9.1C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1C.pdf
- Description:
- 1500W, 9.1V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,388
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Product details
Overview
1.5KE9.1C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 9.1V, working stand-off voltage 7.37V, clamping voltage 13.8V at 50A peak pulse current, and junction temperature range −55°C to +175°C - used for automotive load-dump and ESD protection in power supply rails and I/O interfaces.
For engineers reviewing the 1.5KE9.1C datasheet, 1.5KE9.1C pinout, 1.5KE9.1C application, or 1.5KE9.1C equivalent, this page delivers verified electrical specs, DO-201 terminal mapping, real-world protection use cases, and two validated alternative TVS diodes with documented parameter differences.
Technical Context
The 1.5KE9.1C operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 8.19–10.0V breakdown range at 1.0mA test current. It clamps transients to ≤13.8V at 50A (10/1000μs waveform), with <1μA leakage above 10V and 0.068%/°C VBR temperature coefficient.
Designed for high-energy surge immunity per ISO 7637-2 Pulse 1/2a/2b/3a/3b, it features low dynamic impedance and sub-1ps response time from 0V to VBR, enabling fast suppression of inductive switching spikes and EFT events in 12V automotive and industrial DC systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1.0mA | 8.19–10.0V - defines precise avalanche onset threshold for reliable overvoltage detection |
| VWM | 7.37V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPP=50A | 13.8V - clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500W - peak pulse power handling capability under standardized surge waveform |
| IPP max | 50A - maximum non-repetitive peak impulse current the device sustains without failure |
| Junction temp. (TJ) | −55°C to +175°C - enables operation in under-hood automotive and industrial environments |
| Package | DO-201 - axial-leaded, UL 94V-0 molded package with tin-plated leads per J-STD-002 |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; conducts during forward surge (e.g., load dump reversal) |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12V rail); blocks at VWM, avalanches above VBR to clamp transients |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge rating (10/1000μs) | Withstands automotive load-dump pulses without degradation or thermal runaway |
| Clamping ratio VC/VBR ≈ 1.51 | Low overvoltage margin ensures robust protection margin for 5V/12V logic and power stages |
| Leakage <1μA @ VWM+1V | Minimizes standby power loss and avoids false triggering in low-current sensor circuits |
| AEC-Q101 qualified option (1.5KE9.1CH) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Meets OEM-level EMC immunity requirements for vehicle electronic control units |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients on 12V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges up to 120V/1500W. Use Value: Limits rail voltage to ≤13.8V during ISO 7637-2 Pulse 5a, preventing damage to LDOs, microcontrollers, and CAN transceivers. |
Use Scenario: Protecting analog inputs of PLC I/O modules from ESD and inductive kickback. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting fast transients before signal conditioning circuitry. Use Value: Sub-1ps response ensures clamping occurs before 10ns ESD pulses reach sensitive op-amps or ADC front-ends. |
| LED Driver Output Protection | DC Motor Control Board Protection |
|
Use Scenario: Safeguarding constant-current LED driver outputs against reverse EMF from hot-plug disconnects. IC Role / Device Role / Timing Role: Unidirectional 1.5KE9.1C placed across output terminals to absorb inductive energy during MOSFET turn-off. Use Value: 50A peak current rating handles worst-case flyback currents from multi-amp LED strings without thermal failure. |
Use Scenario: Shielding H-bridge gate drivers from voltage spikes generated by brushed DC motor commutation. IC Role / Device Role / Timing Role: TVS connected from motor supply rail to ground, triggered by >9.1V spikes induced by brush arcing. Use Value: 13.8V clamping voltage prevents gate oxide breakdown in 12V-rated logic-level MOSFETs driving the bridge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ9.0A | DO-214AC (SMA) package; 9.0V nominal VBR; 14.4V VC @ 50A; 400W PPK | Lower power rating limits use to sub-automotive or consumer-grade 12V systems | Select when board space constraints favor surface-mount and surge energy is ≤400W |
| ON Semiconductor 1.5SMC9.0A | DO-214AB (SMC) package; 9.0V nominal VBR; 14.5V VC @ 50A; 1500W PPK | Same surge rating but larger SMC footprint; higher thermal resistance than DO-201 | Choose for compatibility with existing SMC-layout designs where axial leaded assembly is not feasible |
Compared with 1.5KE9.1C, SMAJ9.0A offers smaller size but sacrifices 60% surge energy handling, while 1.5SMC9.0A matches 1500W capability but requires PCB rework due to different package geometry and thermal profile.
Availability
1.5KE9.1C is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver outputs, and DC motor control boards requiring stable component supply across extended temperature ranges and high-reliability surge immunity.
Supply support for 1.5KE9.1C 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 12V/24V automotive and industrial power systems, emphasizing ruggedness, AEC-Q101 qualification, and ISO 7637-2 compliance.
FAQ
What is the exact breakdown voltage range of the 1.5KE9.1C at 1.0mA test current?
The 1.5KE9.1C has a guaranteed breakdown voltage range of 8.19V to 10.0V when measured at 1.0mA DC test current per JEDEC standards. This range reflects manufacturing tolerance and ensures consistent clamping behavior across production lots. The 1.5KE9.1C's specified VBR window allows reliable design margining for 9.1V nominal systems while accommodating process variation.
Is the 1.5KE9.1C unidirectional or bidirectional, and how is polarity marked?
The 1.5KE9.1C is a unidirectional TVS diode, indicated by the "C" suffix per TSC's ordering convention. Polarity is marked by a cathode band on the DO-201 body - the banded end connects to the protected line (anode to ground). Bidirectional variants use "CA" suffix (e.g., 1.5KE9.1CA), which the 1.5KE9.1C does not support.
What is the maximum clamping voltage of the 1.5KE9.1C under standard 10/1000μs surge conditions?
The 1.5KE9.1C clamps to a maximum of 13.8V when subjected to a 50A peak pulse current with 10/1000μs waveform - the industry-standard surge test condition defined in IEC 61000-4-5 and ISO 7637-2. This value is measured at TA = 25°C and represents the upper limit of voltage seen by downstream components during worst-case transient events.
Does the 1.5KE9.1C meet AEC-Q101 qualification, and what does the "C" suffix signify?
The base 1.5KE9.1C is not AEC-Q101 qualified; qualification requires the "H" suffix (e.g., 1.5KE9.1CH). The "C" suffix denotes unidirectional configuration only - it does not indicate automotive qualification. Engineers requiring AEC-Q101 must specify 1.5KE9.1CH, which undergoes full stress testing including HTGB, H3TRB, and temperature cycling per AEC-Q101 Rev D.
What is the thermal derating behavior of the 1.5KE9.1C above 25°C ambient temperature?
The 1.5KE9.1C follows a linear derating curve: peak pulse power drops to 50% at ~125°C ambient and reaches zero at 175°C junction temperature. Derating is defined in Fig.2 of the TSC datasheet and applies to both surge power and steady-state dissipation. For sustained high-temp operation, heatsinking or layout optimization is required to maintain TJ ≤ 175°C - the absolute maximum rating for the 1.5KE9.1C.
1.5KE9.1C 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):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 114A
- 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
1.5KE9.1C FAQ
1.How can I place an order for 1.5KE9.1C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1C 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 1.5KE9.1C reliable?
The price and inventory of 1.5KE9.1C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1C is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1C?
1.5KE9.1C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1C 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 1.5KE9.1C?
For technical support, including 1.5KE9.1C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1C requirements.
6.How does Aetrix verify that 1.5KE9.1C is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1C 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 1.5KE9.1C meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1C?
All 1.5KE9.1C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1C, 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 1.5KE9.1C part is unused and in its original packaging.
Return procedure for 1.5KE9.1C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1C Tags
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