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Taiwan Semiconductor Corporation 1.5KE9.1CA B0G
- Part No.:
- 1.5KE9.1CA B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CA B0G.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:2,390
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Product details
Overview
1.5KE9.1CA B0G from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for high-energy surge protection in automotive and industrial power rails. It features a nominal breakdown voltage of 9.1V, clamping voltage of 13.8V at 50A peak impulse current, and operates across –55°C to +175°C junction temperature range.
For engineers reviewing the 1.5KE9.1CA B0G datasheet, 1.5KE9.1CA B0G pinout, 1.5KE9.1CA B0G application, or 1.5KE9.1CA B0G equivalent, this device serves as a robust, AEC-Q101-qualified solution for ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, fast ESD/inductive switching transient suppression, and low-leakage (<1 µA @ 7.37V) DC-coupled protection circuits.
Technical Context
The 1.5KE9.1CA B0G is a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling single-device protection of AC-coupled or floating signal/power lines. Its 10/1000µs waveform surge rating of 1500W and sub-5ns response time ensure effective suppression of fast transients including electrical fast transients (EFT) and load dump spikes.
It exhibits low dynamic impedance and a temperature coefficient of VBR of 0.068%/°C, supporting stable clamping performance over wide ambient and junction temperature ranges. The device meets RoHS and halogen-free requirements per IEC 61249-2-21 and uses pure tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.19V / 10.00V @ IT = 1.0mA - defines reliable avalanche onset window under standardized test conditions |
| VWM | 7.37V - maximum continuous reverse working voltage before leakage exceeds 1µA |
| VC @ IPP | 13.8V @ 50A - clamping voltage during 10/1000µs surge, limiting downstream voltage stress |
| PPK | 1500W - peak pulse power handling capability, critical for automotive load dump immunity |
| Junction Temp | –55°C to +175°C - enables deployment in under-hood and industrial environments without derating |
| Leakage @ VWM | <1µA - ensures minimal standby power loss and no interference with high-impedance sensing nodes |
| Response Time | <5.0ns - guarantees suppression activation before transient energy damages downstream ICs |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking (bidirectional symmetry means no polarity-dependent orientation; cathode band indicates terminal identification per JEDEC standard).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no DC bias dependency |
| Lead 1 / Lead 2 | Current path for surge conduction | Both leads conduct equally during positive or negative transients; requires symmetric PCB layout for balanced impedance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, or floating supplies without polarity concerns |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications requiring reliability under thermal cycling and vibration |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (load dump), and Pulse 3a/3b (EFT) test profiles |
| Low clamping ratio (VC/VBR) | 1.69 (13.8V / 8.19V) - minimizes overvoltage margin while maintaining robust surge margin |
| Halogen-free & RoHS | Complies with environmental regulations for automotive and industrial end-equipment manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs against load dump (ISO 7637-2 Pulse 2b) and alternator overshoot. IC Role / Device Role / Timing Role: Primary surge shunt element placed upstream of LDOs and microcontrollers to clamp transients below 16V. Use Value: Prevents latch-up or permanent damage to 5V/3.3V logic by limiting rail voltage to ≤13.8V during 1500W surges. | Use Scenario: Safeguarding 4–20mA current-loop transmitters from ESD and field-wiring induced transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across loop terminals to absorb ±8kV contact ESD (IEC 61000-4-2) and inductive kickback. Use Value: Maintains loop integrity with <1µA leakage at 7.37V, avoiding calibration drift or false zero-span errors. |
| LED Driver Input Protection | RS-485 Transceiver Bus Protection |
Use Scenario: Shielding constant-current LED drivers from automotive battery line transients and hot-swap events. IC Role / Device Role / Timing Role: Front-end TVS on input stage to divert surge energy before it reaches MOSFET gate drivers and PWM controllers. Use Value: Withstands repeated 10/1000µs surges up to 1500W without degradation, extending driver lifetime in headlamp modules. | Use Scenario: Protecting RS-485 transceivers in factory automation networks from ground potential differences and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS connected between A/B bus lines and ground to clamp common-mode and differential transients. Use Value: Symmetrical 13.8V clamping prevents receiver saturation and maintains signal integrity during >5kV EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Lower peak power (600W), smaller SMB package (vs. DO-201), VC = 14.4V @ 43.5A | Not rated for AEC-Q101; limited to consumer/industrial use where 1500W surge margin is not required | Select when board space is constrained and surge energy is ≤600W (e.g., secondary-side protection) |
| 1.5SMC9.0CA | Same 1500W rating and DO-214AB package; VBR = 8.55–9.45V, VC = 14.4V @ 43.5A | Surface-mount alternative with higher thermal resistance than axial DO-201; lacks AEC-Q101 qualification | Choose for SMT assembly compatibility if AEC-Q101 is not mandatory and layout allows DO-214AB footprint |
Compared with SMBJ9.0CA and 1.5SMC9.0CA, the 1.5KE9.1CA B0G delivers superior surge robustness (1500W), automotive-grade qualification (AEC-Q101), and lower clamping voltage (13.8V vs. 14.4V), making it the preferred choice for primary protection in harsh-environment 12V systems.
Availability
1.5KE9.1CA B0G is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver input surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE9.1CA 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection, and signal conditioning devices.
The 1.5KE series was developed specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust surge endurance in axial-leaded packages.
FAQ
What is the clamping voltage of the 1.5KE9.1CA B0G under a 50A 10/1000µs surge?
The 1.5KE9.1CA B0G has a maximum clamping voltage (VC) of 13.8V when subjected to a 50A peak impulse current with a 10/1000µs waveform. This value is measured per JEDEC standards and ensures downstream components see less than 14V during worst-case surge events, directly supporting 12V system-level protection design margins.
Is the 1.5KE9.1CA B0G suitable for automotive applications?
Yes, the 1.5KE9.1CA B0G is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its –55°C to +175°C operating range, 1500W surge rating, and DO-201 mechanical robustness make it appropriate for under-hood and body-control module deployments where the 1.5KE9.1CA B0G provides certified transient immunity.
How does the bidirectional configuration of the 1.5KE9.1CA B0G affect its circuit placement?
The 1.5KE9.1CA B0G's bidirectional structure allows it to be placed across any two points needing symmetrical overvoltage protection-such as between signal lines, across AC inputs, or between power and return-without regard to polarity. Unlike unidirectional TVS diodes, the 1.5KE9.1CA B0G eliminates orientation errors during assembly and supports floating or differential node protection without additional components.
What is the maximum leakage current of the 1.5KE9.1CA B0G at its working voltage?
At its maximum working stand-off voltage (VWM) of 7.37V, the 1.5KE9.1CA B0G exhibits a maximum blocking leakage current (ID) of 1µA. This ultra-low leakage ensures minimal impact on high-impedance circuits such as sensor bias networks or precision reference paths, preserving accuracy and power efficiency in systems where the 1.5KE9.1CA B0G is deployed.
Does the 1.5KE9.1CA B0G have halogen-free and RoHS-compliant construction?
Yes, the 1.5KE9.1CA B0G uses halogen-free molding compound per IEC 61249-2-21 and is fully RoHS compliant. Its pure tin-plated leads meet J-STD-002 solderability requirements, and the entire construction supports environmentally regulated manufacturing for automotive and industrial end equipment where the 1.5KE9.1CA B0G is integrated into final assemblies.
1.5KE9.1CA 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:
- -
- 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 B0G FAQ
1.How can I place an order for 1.5KE9.1CA B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CA 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 1.5KE9.1CA B0G reliable?
The price and inventory of 1.5KE9.1CA B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1CA B0G is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CA B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CA B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CA B0G?
1.5KE9.1CA B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CA 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 1.5KE9.1CA B0G?
For technical support, including 1.5KE9.1CA B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CA B0G requirements.
6.How does Aetrix verify that 1.5KE9.1CA B0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CA 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 1.5KE9.1CA B0G meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CA B0G?
All 1.5KE9.1CA B0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CA 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 1.5KE9.1CA B0G part is unused and in its original packaging.
Return procedure for 1.5KE9.1CA B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CA B0G Tags
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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