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Taiwan Semiconductor Corporation 1.5KE91A B0G
- Part No.:
- 1.5KE91A B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91A B0G.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,035
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Product details
Overview
1.5KE91A B0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 91V, minimum VBR = 86.5V at 1.0mA, maximum clamping voltage VC = 125V at 12.6A, and working stand-off voltage VWM = 77.8V - designed for automotive and industrial power rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE91A B0G datasheet, 1.5KE91A B0G pinout, 1.5KE91A B0G application, or 1.5KE91A B0G equivalent, this page delivers verified electrical parameters, DO-201 mechanical data, clamping performance under 10/1000μs surge, leakage current ≤1μA at 77.8V, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
The 1.5KE91A B0G operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 86.5–95.5V breakdown range at 1.0mA test current. It clamps transient energy to ≤125V at 12.6A peak impulse current, delivering 1500W surge capability per 10/1000μs waveform while maintaining low dynamic impedance and sub-nanosecond response time (<1.0ps from 0V to VBR).
Its DO-201 package supports lead-free soldering per J-STD-002, meets UL 94V-0 flammability rating, and is rated for junction temperatures from –55°C to +175°C. The device exhibits a temperature coefficient of VBR of 0.106%/°C and is specified for non-repetitive pulse operation with derating above 25°C ambient per published curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0mA | 86.5V min / 95.5V max - defines precise voltage threshold for avalanche conduction onset |
| VWM | 77.8V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPP = 12.6A | 125V - clamped voltage during full 1500W surge, limiting downstream IC stress |
| PPK | 1500W - peak pulse power handling at 10/1000μs waveform, critical for load dump immunity |
| IPP | 12.6A - peak impulse current corresponding to VC = 125V, used for PCB trace sizing |
| TJ Range | –55°C to +175°C - enables deployment in under-hood automotive and high-temp industrial environments |
| Leakage @ VWM | <1μA - ensures minimal standby power loss and signal integrity in always-on systems |
Pinout & Package
Package: DO-201 axial-leaded plastic case with cathode band marking; RoHS-compliant, halogen-free, UL 94V-0 rated molding compound; pure tin-plated leads, JESD201 Class 2 whisker tested; weight ≈0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode (marked band) | Avalanche clamping terminal | Connected to protected line (e.g., 12V/24V rail); conducts when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge rating (10/1000μs) | Enables robust protection against automotive load dump and ISO 7637-2 Pulse 5a transients without derating |
| Clamping voltage ≤125V at 12.6A | Keeps downstream 100V-rated components within safe operating area during worst-case surge |
| AEC-Q101 qualified option available | Validated for automotive electronics per stress testing including HTOL, TC, UHAST, and ESD |
| Response time <1.0ps (unidirectional) | Ensures suppression initiates before transient edge propagates into sensitive analog/digital circuitry |
| Low IR <1μA above VWM | Minimizes quiescent current draw in battery-powered or always-on control modules |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12V/24V vehicle power distribution networks from load dump and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ECUs, acting as fast-acting shunt clamp during >100V spikes. Use Value: Limits rail voltage to ≤125V during 1500W surges, preventing damage to microcontrollers and CAN transceivers. | Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Standoff protector on 24V DC input terminals, conducting only during overvoltage events exceeding 77.8V. Use Value: Maintains <1μA leakage at normal operating voltage while clamping 12.6A transients to 125V, preserving signal integrity. |
| LED Driver Overvoltage Clamp | Telecom Power Supply Surge Suppression |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers subjected to lightning-induced surges on AC/DC front-end rails. IC Role / Device Role / Timing Role: Primary-level TVS on bulk capacitor input, absorbing energy before it reaches switching controller ICs. Use Value: 1500W rating handles multi-cycle surge events; DO-201 package allows through-hole mounting with thermal relief pads. | Use Scenario: Adding secondary-side transient protection on 48V telecom power supplies compliant with ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Unidirectional clamp on output bus, activated only during reverse-polarity or surge conditions. Use Value: 86.5–95.5V VBR range aligns with 48V system derating margins; 0.106%/°C tempco ensures stable clamping across chassis temperature swings. |
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 SMAJ90A | Same DO-214AC (SMA) package; 90V VBR min (85.5V), 14.3A IPP, 129V VC; 400W rating | Lower power rating limits use to sub-1kW surge environments; surface-mount only | Select when board space constraints require SMD and surge energy is ≤400W |
| ON Semiconductor 1N6294A | Identical electrical specs (JEDEC 1N6294A = 1.5KE91A); same DO-201 package; manufactured under different fab process | No functional difference; validated for identical automotive and industrial use cases | Drop-in alternative with identical pinout, ratings, and qualification - suitable for dual-sourcing |
Compared with 1.5KE91A B0G, SMAJ90A offers smaller footprint but sacrifices 73% surge capacity (400W vs. 1500W), while 1N6294A provides identical performance and form factor as a second-source option with no design or layout changes required.
Availability
1.5KE91A B0G is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input conditioning, LED driver overvoltage clamping, and telecom power supply surge suppression requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified alternatives.
Supply support for 1.5KE91A B0G 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The 1.5KE series was developed specifically for high-energy transient suppression in harsh environments - emphasizing robustness, tight parameter tolerances, and AEC-Q101 qualification for automotive electronics.
FAQ
What is the exact breakdown voltage range of the 1.5KE91A B0G?
The 1.5KE91A B0G has a guaranteed breakdown voltage range of 86.5V to 95.5V at 1.0mA test current (IT), per JEDEC specification and Taiwan Semiconductor's O2104 datasheet. This range reflects manufacturing tolerance and ensures reliable triggering across temperature and unit-to-unit variation while maintaining compatibility with 91V nominal system designs.
Is the 1.5KE91A B0G AEC-Q101 qualified?
The 1.5KE91A B0G itself is not marked as AEC-Q101 qualified; however, the 1.5KE91AH variant (with "H" suffix) is explicitly qualified per AEC-Q101. The B0G suffix denotes green compound and tape-and-reel packaging (1250 pcs), not qualification status. For automotive applications requiring formal qualification, specify 1.5KE91AH or confirm qualification status via TSC's official documentation.
What is the maximum clamping voltage of the 1.5KE91A B0G under surge conditions?
The maximum clamping voltage (VC) of the 1.5KE91A B0G is 125V at 12.6A peak impulse current (IPP), measured using the standard 10/1000μs double-exponential surge waveform. This value is guaranteed across temperature and represents the upper limit of voltage seen by downstream circuitry during full-rated 1500W transient events.
Can the 1.5KE91A B0G be used in bidirectional configurations?
No - the 1.5KE91A B0G is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., 1.5KE91CA). Using 1.5KE91A B0G in reverse-biased mode beyond its specified VWM (77.8V) risks permanent damage due to lack of forward conduction path and undefined reverse breakdown behavior.
What is the thermal derating behavior of the 1.5KE91A B0G above 25°C ambient?
The 1.5KE91A B0G follows a linear derating curve from 100% rated 1500W at 25°C ambient down to 0% at 175°C junction temperature. Derating is defined in Fig.2 of the datasheet: at 75°C ambient, peak pulse power drops to ~75% (~1125W); at 125°C, it falls to ~40% (~600W). Designers must apply appropriate thermal relief and consider junction-to-ambient resistance when operating near temperature limits.
1.5KE91A B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE91A B0G FAQ
1.How can I place an order for 1.5KE91A B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91A B0G 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 1.5KE91A B0G reliable?
The price and inventory of 1.5KE91A B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91A B0G is usually 5 days.
3.What payment methods are accepted for 1.5KE91A B0G?
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4.How is shipping managed for 1.5KE91A B0G?
1.5KE91A B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91A B0G 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 1.5KE91A B0G?
For technical support, including 1.5KE91A B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91A B0G requirements.
6.How does Aetrix verify that 1.5KE91A B0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE91A B0G 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 1.5KE91A B0G meets industry standards.
7.What is the process for return or replacement of 1.5KE91A B0G?
All 1.5KE91A B0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91A B0G, 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 1.5KE91A B0G part is unused and in its original packaging.
Return procedure for 1.5KE91A B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91A B0G Tags
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