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Taiwan Semiconductor Corporation 1.5KE9.1A R0G
- Part No.:
- 1.5KE9.1A R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1A R0G.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:7,015
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Product details
Overview
1.5KE9.1A R0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 9.1V, minimum VBR = 8.65V at IT = 1.0mA, maximum clamping voltage VC = 13.4V at IPP = 50A, and working stand-off voltage VWM = 7.78V - 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 R0G datasheet, 1.5KE9.1A R0G pinout, 1.5KE9.1A R0G application, or 1.5KE9.1A R0G equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity mapping, real-world clamping performance under 10/1000μs surge, leakage behavior at VWM, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The 1.5KE9.1A R0G uses an avalanche breakdown mechanism to clamp fast-rising transients, achieving sub-nanosecond response (<1.0ps from 0V to VBR) and low dynamic impedance for effective suppression of inductive switching spikes and ESD events. Its unidirectional architecture supports DC-biased circuits where reverse polarity protection is not required.
Rated for 1500W peak pulse power at 10/1000μs waveform and 175°C junction temperature, it operates within -55°C to +175°C ambient range and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards - confirming suitability for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT | 8.65–9.55V at 1.0mA test current - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 7.78V maximum - ensures stable blocking during normal 9V system operation without leakage-induced power loss |
| VC @ IPP | 13.4V at 50A peak impulse - limits downstream IC voltage stress to safe levels during ISO 7637-2 Pulse 2a (50A surge) |
| IPP | 50A peak impulse current - supports robust protection against high-energy load dump and inductive kick events |
| PPK | 1500W peak pulse power - enables single-device handling of severe automotive transients without derating |
| Junction Temp | -55°C to +175°C - validated for engine control module mounting near heat sources without thermal shutdown |
| Leakage @ VWM | <1μA - minimizes standby current drain in always-on vehicle subsystems |
Pinout & Package
Package: DO-201 axial leaded case with cathode band marking; pure tin-plated leads compliant with J-STD-002 solderability; 0.090g mass; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or negative rail; establishes reference for clamping action during positive transients |
| Cathode | Protected line input | Connected to power rail (e.g., battery feed); conducts avalanche current to anode when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, HAST, and UHAST |
| 10/1000μs surge rating | 1500W clamping capability confirmed per Fig.3 waveform - matches ISO 7637-2 Pulse 2a energy profile |
| Sub-1ps response time | Enables suppression before sensitive logic or analog circuitry experiences overvoltage damage |
| Low dynamic impedance | Ensures minimal voltage overshoot during high di/dt events such as relay coil de-energization |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - suitable for global automotive supply chain |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Input |
|---|---|
Use Scenario: Protection of 12V battery-fed microcontroller power rails against load dump and alternator ripple. IC Role / Device Role: Unidirectional TVS placed between VBAT and GND to clamp positive transients only. Use Value: Limits voltage excursion to ≤13.4V during 50A ISO 7637-2 Pulse 2a, preventing MCU brownout or latch-up. |
Use Scenario: Guarding 24V DC input stage of programmable logic controller against inductive switching noise from solenoid drivers. IC Role / Device Role: Primary surge suppression on main power entry before bulk capacitance and LDO regulators. Use Value: Absorbs 1500W surges without degradation, maintaining system uptime in factory automation environments. |
| LED Headlamp Driver Module | Automotive Body Control Module (BCM) |
Use Scenario: Safeguarding constant-current LED driver ICs from reverse-polarity connection transients and ESD during service. IC Role / Device Role: Front-end TVS on input supply line to protect buck controller and gate drivers. Use Value: Sub-1ps response prevents gate oxide damage in MOSFET drivers during hot-swap events. |
Use Scenario: Securing LIN bus power domain and window motor driver outputs against battery disconnect transients. IC Role / Device Role: Point-of-load TVS on 12V distribution rail feeding multiple actuator drivers. Use Value: Withstands repeated 50A pulses per ISO 7637-2 Pulse 3b, ensuring long-term reliability in door module assemblies. |
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 | Same DO-214AC package; lower PPK = 400W; VC = 14.4V @ 28.6A; no AEC-Q101 qualification | Not rated for automotive under-hood use; limited to industrial or consumer-grade 12V systems | Select only if cost sensitivity outweighs automotive qualification and 1500W surge headroom requirements |
| ON Semiconductor 1.5SMC9.0A | DO-214AB package; PPK = 1500W; VC = 14.5V @ 43.5A; AEC-Q101 qualified; higher VC than 1.5KE9.1A R0G | Compatible with same PCB footprint as SMC but requires layout adaptation from DO-201 axial leads | Choose when surface-mount assembly is preferred and 1.1V higher clamping voltage is acceptable |
Compared with SMAJ9.0A and 1.5SMC9.0A, the 1.5KE9.1A R0G delivers superior clamping precision (13.4V vs ≥14.4V), maintains axial DO-201 compatibility for legacy through-hole designs, and provides full AEC-Q101 validation - making it the optimal choice for new automotive power rail protection where thermal margin and qualification integrity are critical.
Availability
1.5KE9.1A R0G is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input stages, LED driver modules, and body control unit power domains requiring stable component supply across extended temperature ranges and high-reliability surge immunity.
Supply support for 1.5KE9.1A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and automotive-qualified components since 1979.
The 1.5KE series was engineered specifically for automotive and industrial transient suppression, emphasizing high-energy clamping accuracy, AEC-Q101 compliance, and robustness in harsh thermal and electrical environments.
FAQ
What is the exact breakdown voltage range for 1.5KE9.1A R0G?
The 1.5KE9.1A R0G has a guaranteed breakdown voltage range of 8.65V to 9.55V at 1.0mA test current (IT), measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in automotive power rails.
Is 1.5KE9.1A R0G AEC-Q101 qualified?
Yes, 1.5KE9.1A R0G is AEC-Q101 qualified - confirmed by Taiwan Semiconductor's O2104 specification document. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST) to validate reliability for automotive under-hood applications.
What does the 'R0G' suffix mean in 1.5KE9.1A R0G?
The 'R0G' suffix in 1.5KE9.1A R0G indicates green (halogen-free) compound packaging and tape-and-reel delivery format (1,250 units per reel). It aligns with Taiwan Semiconductor's ordering code convention where 'R' denotes tape-and-reel and 'G' confirms RoHS and halogen-free compliance per IEC 61249-2-21.
How does 1.5KE9.1A R0G perform under ISO 7637-2 Pulse 2a?
Under ISO 7637-2 Pulse 2a (50A, 10/1000μs), the 1.5KE9.1A R0G clamps to a maximum of 13.4V - well below typical 16V absolute maximum ratings of automotive MCUs and power management ICs. Its 1500W rating and low dynamic impedance ensure repeatable performance without degradation across multiple pulse events.
Can 1.5KE9.1A R0G replace bidirectional TVS diodes in circuit designs?
No, 1.5KE9.1A R0G is unidirectional and must not replace bidirectional TVS diodes. It conducts only during positive transients on the cathode; reverse voltage beyond ~1.5V forward drop will cause conduction and potential failure. For AC or bipolar protection, use designated 1.5KE9.1CA variants instead of 1.5KE9.1A R0G.
1.5KE9.1A 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:
- 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 R0G FAQ
1.How can I place an order for 1.5KE9.1A R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1A 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 1.5KE9.1A R0G reliable?
The price and inventory of 1.5KE9.1A R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1A R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1A R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1A R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1A R0G?
1.5KE9.1A R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1A 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 1.5KE9.1A R0G?
For technical support, including 1.5KE9.1A R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1A R0G requirements.
6.How does Aetrix verify that 1.5KE9.1A R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1A 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 1.5KE9.1A R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1A R0G?
All 1.5KE9.1A R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1A 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 1.5KE9.1A R0G part is unused and in its original packaging.
Return procedure for 1.5KE9.1A R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1A R0G Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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