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Taiwan Semiconductor Corporation 1.5KE9.1CA
- Part No.:
- 1.5KE9.1CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CA.pdf
- Description:
- TVS 1500W 9.1V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:3,958
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Product details
Overview
1.5KE9.1CA from Taiwan Semiconductor is a bidirectional 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 fast response time <5.0ns. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE9.1CA datasheet, 1.5KE9.1CA pinout, 1.5KE9.1CA application, or 1.5KE9.1CA equivalent, this page delivers verified electrical parameters, bidirectional TVS behavior, DO-201 terminal mapping, AEC-Q101 qualification status, and direct alternatives for ESD and load-dump protection design.
Technical Context
The 1.5KE9.1CA operates as a bidirectional avalanche diode, symmetrically clamping voltage surges above ±9.1V in both polarities. Its VBR min/max range is 8.19V to 10.00V at 1.0mA test current, with maximum clamping voltage VC of 13.8V at IPP = 50A under 10/1000μs waveform.
It meets ISO 7637-2 immunity requirements for automotive electronics and supports steady-state power dissipation up to 5W at TL = 75°C on 16mm × 16mm copper pad. Junction temperature range is −55°C to +175°C, and leakage current ID is ≤1μA at 7.37V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1.0mA | 8.19–10.00V: Ensures reliable bidirectional avalanche conduction onset within defined tolerance |
| VWM | 7.37V: Maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPP=50A | 13.8V: Clamped voltage during 10/1000μs surge; determines protected circuit's maximum stress level |
| PPK | 1500W: Peak pulse power handling per single non-repetitive event; defines transient energy absorption capacity |
| Response Time | <5.0ns (bidirectional): Enables suppression of fast EFT and coupling-induced transients before IC damage occurs |
| ID @ VWM | <1μA: Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes |
| TJ Range | −55°C to +175°C: Supports under-hood automotive and industrial environments without derating |
Pinout & Package
Package: DO-201 - axial-leaded, molded plastic case with pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity marked by cathode band; for bidirectional operation, no functional polarity distinction exists.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient return path (bidirectional) | Provides low-impedance surge shunt to ground or rail in either polarity; symmetric with Cathode |
| Cathode (Lead 2) | Transient return path (bidirectional) | Functions identically to Anode under reverse bias; device has no directional preference in circuit placement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or floating DC buses without polarity constraints |
| AEC-Q101 qualified | Validated reliability for automotive powertrain and body electronics per stress-test requirements |
| ISO 7637-2 compliance | Guarantees immunity to standardized automotive transients including load dump (Pulse 5a/b) and coupled noise (Pulses 1–3) |
| Low dynamic impedance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin |
| UL 94V-0 molding compound | Ensures flame-retardant enclosure for safety-critical applications in enclosed enclosures |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input to clamp ±100V transients to ≤13.8V. Use Value: Prevents latch-up or gate oxide rupture in downstream PMICs and microcontrollers during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding PLC I/O modules connected to inductive solenoid loads. IC Role / Device Role / Timing Role: Mounted across relay coil terminals to absorb flyback energy and suppress voltage spikes >200V. Use Value: Eliminates need for separate snubbers; clamps 50A surge within 5ns to protect driver FETs and isolation barriers. |
| LED Lighting Driver Inputs | Telecom Power Interface |
Use Scenario: Shielding constant-current LED drivers from lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Installed between bridge rectifier output and bulk capacitor to limit transient overvoltage. Use Value: Maintains VWM = 7.37V margin below 9.1V nominal, ensuring no conduction during normal 12V DC operation. | Use Scenario: Hardening PoE-powered Ethernet switches against ESD and EFT on 48V DC input rails. IC Role / Device Role / Timing Role: Placed across primary-side DC bus to clamp common-mode transients from cable coupling. Use Value: Leverages bidirectional symmetry to suppress both positive and negative fast transients without polarity alignment. |
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 | Unidirectional; 9.0V VBR min/max 8.1–9.9V; 1000W PPK; DO-214AC package | Requires correct polarity orientation; lower surge rating; smaller footprint but higher thermal resistance | Select when board space is constrained and unidirectional protection suffices with external polarity control |
| ON Semiconductor 1.5SMC9.0CA | Bidirectional; 9.0V VBR min/max 8.1–9.9V; 1500W PPK; SMC (DO-214AB) package | Surface-mount alternative; identical clamping (13.8V @ 50A); requires rework of through-hole layout | Choose for automated assembly and higher-density layouts where DO-201 axial leads are incompatible |
Compared with 1.5KE9.1CA, SMAJ9.0A offers smaller size but sacrifices bidirectionality and 33% peak power margin, while 1.5SMC9.0CA retains full electrical equivalence and surge capability in an SMT form factor-enabling drop-in replacement only if PCB redesign accommodates SMC footprint.
Availability
1.5KE9.1CA is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive inputs, LED lighting surge hardening, and telecom power interface applications requiring stable component supply and AEC-Q101-compliant reliability.
Supply support for 1.5KE9.1CA 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 power management devices.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing robustness against ISO 7637-2 pulses, wide temperature operation, and AEC-Q101 qualification.
FAQ
What does the 'CA' suffix mean in 1.5KE9.1CA?
The 'CA' suffix in 1.5KE9.1CA denotes bidirectional configuration - meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., 1.5KE9.1), the 1.5KE9.1CA has no anode/cathode functional distinction and can be installed without regard to orientation in the circuit. This makes it ideal for AC-coupled or floating DC applications where polarity reversal is possible.
Is 1.5KE9.1CA AEC-Q101 qualified?
Yes, the 1.5KE9.1CA is AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor 1.5KE Series datasheet (Version O2104). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for automotive powertrain, body control, and infotainment systems where reliability under harsh conditions is mandatory.
What is the clamping voltage of 1.5KE9.1CA at rated surge current?
The 1.5KE9.1CA has a maximum clamping voltage (VC) of 13.8V at a peak pulse current (IPP) of 50A, measured under the standard 10/1000μs double-exponential waveform. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events and is critical for ensuring downstream components like MCUs or gate drivers remain within their absolute maximum ratings.
Can 1.5KE9.1CA replace 1.5KE9.1 in an existing design?
Yes, the 1.5KE9.1CA can directly replace the unidirectional 1.5KE9.1 in most cases because both share identical VBR (8.19–10.00V), VWM (7.37V), VC (13.8V), and package (DO-201). However, since 1.5KE9.1CA is bidirectional, it eliminates polarity sensitivity - simplifying assembly and improving robustness in circuits exposed to reverse transients. No PCB changes are required, though layout review is recommended if previous designs relied on unidirectional blocking behavior.
What standards does 1.5KE9.1CA meet for automotive transient immunity?
The 1.5KE9.1CA meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b - covering key automotive transient threats including battery disconnect, load dump simulation, and capacitive coupling noise. Its 1500W surge rating and sub-5ns response time ensure effective suppression of these waveforms without degradation, making it suitable for front-end protection in modules certified to ISO 16750-2 and CISPR 25 Class 5.
1.5KE9.1CA 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):
- 7.78V
- 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
1.5KE9.1CA FAQ
1.How can I place an order for 1.5KE9.1CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CA 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 1.5KE9.1CA reliable?
The price and inventory of 1.5KE9.1CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1CA is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CA?
1.5KE9.1CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CA 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 1.5KE9.1CA?
For technical support, including 1.5KE9.1CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CA requirements.
6.How does Aetrix verify that 1.5KE9.1CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CA 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 1.5KE9.1CA meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CA?
All 1.5KE9.1CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CA, 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 1.5KE9.1CA part is unused and in its original packaging.
Return procedure for 1.5KE9.1CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CA Tags
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