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Taiwan Semiconductor Corporation 1.5KE91A R0G
- Part No.:
- 1.5KE91A R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91A R0G.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,439
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Product details
Overview
1.5KE91A R0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 91V, working stand-off voltage 77.8V, clamping voltage 125V at 12.6A peak pulse current, and junction temperature rating up to +175°C. It protects automotive power electronics and industrial control inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE91A R0G datasheet, 1.5KE91A R0G pinout, 1.5KE91A R0G application, or 1.5KE91A R0G equivalent, key selection criteria include unidirectional polarity, 125V clamping performance at 12.6A, 77.8V working voltage margin, AEC-Q101 qualification status, and DO-201 mechanical compatibility with high-reliability PCB layouts.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped crowbar device during fast-rising transients (response <1.0ps), diverting surge energy away from downstream ICs by entering avalanche conduction when reverse voltage exceeds 86.5V (min VBR). Its low dynamic impedance ensures stable clamping under 10/1000μs waveform stress.
The 1.5KE91A R0G features pure tin-plated leads compliant with J-STD-002 solderability, meets UL 94V-0 flammability, and supports steady-state power dissipation of 5W at 75°C lead temperature on 16mm × 16mm copper pad - critical for sustained overvoltage events in automotive ECU power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5V / 95.5V at 1.0mA test current - defines precise avalanche onset window for reliable overvoltage triggering |
| VWM | 77.8V - maximum continuous reverse operating voltage before leakage exceeds 1µA, ensuring no false triggering in 72V nominal systems |
| VC @ IPP | 125V at 12.6A peak pulse - clamping level that keeps protected ICs below absolute maximum ratings during ISO 7637-2 Pulse 5a surges |
| PPK | 1500W - peak surge power handling per 10/1000μs waveform, enabling single-event protection of 12V/24V/48V power domains |
| TJ max | +175°C - extended junction temperature range supports under-hood automotive placement without derating |
| Leakage @ VWM | <1µA - minimal standby current draw preserves battery life in always-on vehicle modules |
| Response time | <1.0ps - sub-picosecond turn-on enables suppression of ESD and fast-switching noise before sensitive logic is disturbed |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; body length 5.2–6.2mm, diameter 2.5–3.5mm, lead spacing 10.0mm min, RoHS-compliant green molding compound rated UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; carries full surge current during clamping |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., battery rail); reverse-biased during normal operation, avalanches at VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JEDEC standards |
| ISO 7637-2 compliance | Tested to withstand Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Low dynamic impedance | Ensures tight clamping voltage tolerance across production lot and temperature range, minimizing overshoot on protected nodes |
| Halogen-free construction | Meets IEC 61249-2-21 requirements, supporting environmentally regulated automotive supply chains |
| 100% surge-tested | Each unit verified at 1500W 10/1000μs pulse to guarantee minimum clamping performance before shipment |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12V/24V power input of BCM from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 125V transients to safe levels, preventing damage to LDO regulators and microcontroller power pins. |
Use Scenario: Shields 24V digital input terminals from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Front-end protection for optocoupler input stage and signal conditioning circuitry. Use Value: Limits voltage to ≤125V during 1kV/10/1000μs surge, preserving isolation barrier integrity and ADC reference stability. |
| Commercial Lighting Driver | EV Onboard Charger (OBC) Auxiliary Supply |
Use Scenario: Guards AC-DC auxiliary supply input against lightning-induced surges on mains-connected LED drivers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bridge rectifier output before bulk capacitor. Use Value: Absorbs 1500W surge energy without degradation, maintaining >100,000-cycle lifetime in outdoor-rated luminaires. |
Use Scenario: Protects 12V auxiliary power rail feeding gate drivers and communication ICs in OBC control board. IC Role / Device Role / Timing Role: Secondary-level TVS after main DC-DC, safeguarding isolated CAN transceivers and MCU I/O. Use Value: Enables AEC-Q101 compliance for entire OBC subsystem while meeting ISO 16750-2 transient immunity requirements. |
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 package, 90V VBR, 126V VC @ 12.5A, 400W PPK | Lower surge rating limits use to non-automotive consumer or industrial applications with lower threat severity | Select when cost sensitivity outweighs automotive qualification and 1500W surge headroom is unnecessary |
| Vishay 1.5SMC91A | DO-214AB package, identical 91V VBR and 125V VC, but rated for 1500W with different thermal derating curve | Surface-mount footprint requires PCB redesign; lacks AEC-Q101 validation for automotive deployment | Choose only for space-constrained SMT designs where through-hole DO-201 layout is impractical |
Compared with SMAJ90A and 1.5SMC91A, the 1.5KE91A R0G uniquely combines through-hole DO-201 mechanical robustness, AEC-Q101 qualification, and full 1500W 10/1000μs surge capability - making it the only option validated for under-hood automotive power rail protection without layout or reliability compromise.
Availability
1.5KE91A R0G is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, commercial lighting systems, and EV onboard charger auxiliary supplies requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE91A 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, specializing in high-reliability protection devices and power management components.
The 1.5KE series was designed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for harsh-environment deployment.
FAQ
What is the polarity configuration of the 1.5KE91A R0G?
The 1.5KE91A R0G is a unidirectional TVS diode with cathode band marking indicating the avalanche conduction terminal. During normal operation, it blocks reverse voltage up to 77.8V; when transient voltage exceeds 86.5V, it conducts from cathode to anode to clamp the line. This configuration is optimized for DC power rail protection where polarity is fixed.
Does the 1.5KE91A R0G meet AEC-Q101 requirements?
Yes, the 1.5KE91A R0G is AEC-Q101 qualified - confirmed in Taiwan Semiconductor's official documentation. It undergoes stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JEDEC JESD22-A114, validating its suitability for automotive under-hood applications such as engine control units and body electronics.
What is the maximum clamping voltage of the 1.5KE91A R0G under surge conditions?
The 1.5KE91A R0G has a maximum clamping voltage (VC) of 125V at 12.6A peak pulse current (IPP) under the standard 10/1000μs waveform. This value is guaranteed across temperature and production lot, ensuring protected circuits remain within safe operating limits during ISO 7637-2 Pulse 5a events.
How does the 1.5KE91A R0G compare to bidirectional variants like 1.5KE91CA?
The 1.5KE91A R0G is unidirectional and intended for DC line protection with defined polarity; the 1.5KE91CA is bidirectional and used in AC-coupled or polarity-agnostic signal lines. They share identical VBR and VC specs but differ in leakage behavior and circuit integration - using 1.5KE91A R0G in AC applications risks forward conduction failure.
What is the thermal derating behavior of the 1.5KE91A R0G above 25°C ambient?
The 1.5KE91A R0G follows a linear derating curve: peak pulse power drops to 75% at 75°C ambient and reaches zero at 175°C junction temperature. Derating is based on Fig.2 in the official datasheet and assumes mounting on a 16mm × 16mm copper pad; smaller pads require additional derating per thermal resistance calculations.
1.5KE91A 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):
- 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 R0G FAQ
1.How can I place an order for 1.5KE91A R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91A 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 1.5KE91A R0G reliable?
The price and inventory of 1.5KE91A R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91A R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE91A R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91A R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91A R0G?
1.5KE91A R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91A 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 1.5KE91A R0G?
For technical support, including 1.5KE91A R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91A R0G requirements.
6.How does Aetrix verify that 1.5KE91A R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE91A 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 1.5KE91A R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE91A R0G?
All 1.5KE91A R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91A 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 1.5KE91A R0G part is unused and in its original packaging.
Return procedure for 1.5KE91A R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91A R0G Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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