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Taiwan Semiconductor Corporation 1.5KE91CA R0G
- Part No.:
- 1.5KE91CA R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91CA R0G.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:9,763
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Product details
Overview
1.5KE91CA R0G from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 91V, clamping voltage 131V at 12A peak impulse current, and working stand-off voltage 73.7V. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE91CA R0G datasheet, 1.5KE91CA R0G pinout, 1.5KE91CA R0G application, or 1.5KE91CA R0G equivalent, this page delivers verified electrical parameters, bidirectional TVS behavior, AEC-Q101 qualification status, DO-201 mechanical data, and real-world ESD/inductive-spike protection use cases - all confirmed from Taiwan Semiconductor's official O2104 datasheet.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with VBR = 81.9–100V at IT = 1.0mA and clamps to ≤131V at IPP = 12A under 10/1000μs waveform. Its low dynamic impedance ensures rapid voltage limiting during fast transients.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing and ISO 7637-2 immunity requirements. Junction temperature range is –55°C to +175°C, and leakage current is ≤1μA at 73.7V (VWM), supporting stable operation in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 81.9V / 100V at 1.0mA test current - defines reliable conduction onset in either polarity |
| VWM | 73.7V - maximum continuous reverse voltage before significant leakage begins |
| VC @ IPP | 131V at 12A peak impulse - clamping voltage limits downstream circuit stress during surge |
| PPK | 1500W - peak pulse power handling per 10/1000μs waveform, enabling robust transient absorption |
| IPP | 12A - maximum non-repetitive surge current the device safely clamps without failure |
| Junction Temp | –55°C to +175°C - supports under-hood automotive and industrial ambient conditions |
| Leakage @ VWM | <1μA - negligible standby power loss and minimal impact on high-impedance sensing nodes |
Pinout & Package
Package: DO-201 axial lead package with cathode band marking (bidirectional symmetry means no functional polarity; band denotes terminal orientation only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal serves as input/output - bidirectional conduction enables single-device protection across AC or floating DC lines |
| Lead 1 / Lead 2 | Connection interface | Sn-plated copper leads compliant with J-STD-002 solderability; 0.090g mass supports thermal mass considerations in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - suitable for engine control, body electronics, and ADAS power domains |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-coupled noise) without degradation |
| 1500W surge rating | Handles high-energy transients common in 12V/24V vehicle systems and industrial motor drives without derating |
| Fast response time | <5.0ns turn-on - limits voltage overshoot before sensitive ICs experience latch-up or gate oxide damage |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives - supports environmentally compliant manufacturing and end-of-life processing |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at power entry to clamp surges before they reach LDOs, microcontrollers, and CAN transceivers. Use Value: Clamps to 131V at 12A, preventing overvoltage damage while maintaining system uptime per ISO 7637-2 Pulse 1/2a/2b. |
Use Scenario: Safeguarding gate drivers and feedback sensors in 24V/48V motor inverters exposed to inductive kickback. IC Role / Device Role / Timing Role: Mounted across DC bus or IGBT collector-emitter to absorb switching spikes and prevent false triggering. Use Value: 1500W peak power rating absorbs repetitive 10/1000μs energy bursts without thermal runaway or parameter drift. |
| LED Lighting Surge Suppression | Telecom Power Interface |
Use Scenario: Shielding constant-current LED drivers from lightning-induced surges on outdoor signage or streetlight inputs. IC Role / Device Role / Timing Role: Placed across input terminals of buck/boost converters to limit transient voltage before primary-side MOSFETs and controllers. Use Value: Low leakage (<1μA at 73.7V) avoids efficiency loss in low-power standby modes; DO-201 footprint simplifies retrofit into legacy designs. |
Use Scenario: Protecting PoE-powered devices (e.g., IP cameras, wireless APs) from induced surges on Ethernet cable pairs. IC Role / Device Role / Timing Role: Used in hybrid protection schemes with gas discharge tubes and series impedance to meet IEC 61000-4-5 Level 4. Use Value: Symmetrical bidirectional clamping ensures equal protection on differential pairs without polarity concerns during installation or field maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ90CA | Same DO-214AC (SMA) package, 90V nominal, 14.3A IPP, 135V VC; lower surge rating (400W) | Not AEC-Q101 qualified; intended for commercial/industrial, not automotive | Select when cost sensitivity outweighs automotive qualification and higher surge margin is unnecessary |
| ON Semiconductor 1.5SMC91CA | DO-214AB (SMC) package, same 91V nominal, 12.3A IPP, 131V VC; AEC-Q101 option available (1.5SMC91CAQ) | Higher thermal resistance due to SMC footprint; requires larger pad area for equivalent power dissipation | Choose if existing board uses SMC footprint and AEC-Q101 compliance is required - verify thermal relief design |
Compared with 1.5KE91CA R0G, SMAJ90CA offers smaller size but lacks automotive qualification and surge capacity, while 1.5SMC91CA matches performance but demands different PCB layout and thermal management - making 1.5KE91CA R0G optimal for new DO-201-based automotive designs requiring proven 1500W capability.
Availability
1.5KE91CA R0G is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive interfaces, LED lighting surge suppression, and telecom power input stages requiring stable component supply and long-term lifecycle continuity.
Supply support for 1.5KE91CA R0G 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, serving global automotive, industrial, and consumer markets since 1979.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust DO-201 packaging for under-hood and factory-floor deployment.
FAQ
What does the 'CA' suffix mean in 1.5KE91CA R0G?
The 'CA' suffix in 1.5KE91CA R0G indicates a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions. This differs from 'A' suffix parts (unidirectional) and enables protection of AC-coupled or floating DC circuits without polarity concerns. The 'R0G' denotes green compound and tape-and-reel packaging per TSC's ordering code.
Is 1.5KE91CA R0G AEC-Q101 qualified?
Yes, 1.5KE91CA R0G is AEC-Q101 qualified, as confirmed in Taiwan Semiconductor's official 1.5KE series datasheet (Version O2104). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its suitability for automotive power electronics such as body control modules and infotainment power supplies.
What is the clamping voltage of 1.5KE91CA R0G at its rated surge current?
The clamping voltage (VC) of 1.5KE91CA R0G is 131V at 12A peak impulse current (IPP) under the standard 10/1000μs waveform. This value is measured per JEDEC test conditions and represents the maximum voltage seen by downstream circuitry during a full-rated transient event - critical for ensuring connected ICs remain within absolute maximum ratings.
Can 1.5KE91CA R0G replace unidirectional TVS diodes like 1.5KE91A?
No - 1.5KE91CA R0G is bidirectional and cannot directly replace unidirectional 1.5KE91A in circuits relying on DC polarity for proper operation (e.g., reverse-polarity protection or single-rail clamping). While both share identical VBR and VC specs, their conduction behavior differs fundamentally: 1.5KE91A blocks in one direction only, whereas 1.5KE91CA R0G conducts symmetrically. Substitution requires schematic and layout review.
What is the maximum junction temperature rating for 1.5KE91CA R0G?
The maximum junction temperature (TJMAX) for 1.5KE91CA R0G is +175°C, with an operational range from –55°C to +175°C. This wide rating supports placement near heat sources in automotive engine compartments or industrial motor drives, provided PCB thermal relief (e.g., copper pour, via stitching) maintains junction-to-ambient thermal resistance within safe limits per Fig.2 derating curves.
1.5KE91CA R0G 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE91CA R0G FAQ
1.How can I place an order for 1.5KE91CA R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91CA R0G 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 1.5KE91CA R0G reliable?
The price and inventory of 1.5KE91CA R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91CA R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE91CA R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91CA R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91CA R0G?
1.5KE91CA R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91CA R0G 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 1.5KE91CA R0G?
For technical support, including 1.5KE91CA R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91CA R0G requirements.
6.How does Aetrix verify that 1.5KE91CA R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE91CA R0G 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 1.5KE91CA R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE91CA R0G?
All 1.5KE91CA R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91CA R0G, 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 1.5KE91CA R0G part is unused and in its original packaging.
Return procedure for 1.5KE91CA R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91CA R0G Tags
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