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Taiwan Semiconductor Corporation 1.5KE9.1CA R0G
- Part No.:
- 1.5KE9.1CA R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CA R0G.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:5,872
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Product details
Overview
1.5KE9.1CA R0G from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 9.1V, working stand-off voltage 7.37V, clamping voltage 13.8V at 12A peak pulse current, and fast response time <5.0ns - designed for ESD and electrical fast transient protection in automotive power rails and industrial control I/O interfaces.
For engineers reviewing the 1.5KE9.1CA R0G datasheet, 1.5KE9.1CA R0G pinout, 1.5KE9.1CA R0G application, or 1.5KE9.1CA R0G equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity mapping, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance status, AEC-Q101 qualification evidence, and real-world design trade-offs versus alternative TVS devices.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage VBR = 8.19–10.00V at 1.0mA test current, clamping voltage VC = 13.8V at 12A (10/1000μs), and junction temperature range –55°C to +175°C. Its low dynamic impedance ensures effective voltage limiting during fast transients.
It meets ISO 7637-2 for automotive load-dump and inductive-switching immunity, supports unidirectional forward surge current up to 200A (8.3ms half-sine), and features <1μA blocking leakage above 10V - critical for low-power sensor interface protection without signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.19V / 10.00V at 1.0mA - defines reliable conduction onset under bidirectional surge conditions |
| VWM | 7.37V - maximum continuous reverse/forward voltage before leakage exceeds 1μA; sets safe operating margin below breakdown |
| VC @ IPP | 13.8V at 12A (10/1000μs) - peak clamped voltage seen by protected IC; determines downstream voltage stress |
| PPK | 1500W - single-pulse surge handling capacity; enables robust protection against ISO 7637-2 Pulse 1 (inductive kick) and Pulse 2b (battery disconnect) |
| IPP | 12A - maximum non-repetitive peak impulse current; directly correlates with PCB trace sizing and fuse coordination |
| TJMAX | +175°C - extended junction temperature rating supports under-hood automotive placement and high-ambient industrial environments |
| Response Time | <5.0ns (bidirectional) - ensures suppression activation before transient energy couples into sensitive analog or digital circuitry |
Pinout & Package
Package: DO-201 axial leaded case with cathode band marking (bidirectional symmetry means no functional anode/cathode distinction; band denotes polarity reference per JEDEC standard).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Reference terminal for bidirectional clamping | Connected to line or signal being protected; no DC polarity dependency in operation |
| Cathode (lead with band) | Reference terminal for bidirectional clamping | Connected to ground or return path; band serves as mechanical orientation marker only |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for powertrain and body electronics |
| ISO 7637-2 compliance | Tested to Pulse 1 (inductive load dump), Pulse 2a/2b (battery transients), and Pulse 3a/3b (switching noise) - eliminates need for additional system-level validation |
| Low dynamic impedance | Enables tight clamping window (VC – VBR = ~4.8V) - minimizes overvoltage exposure to downstream logic or analog front-ends |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance |
| Pure tin-plated leads | Solderable per J-STD-002; eliminates lead-free solder wetting issues and whisker risk (JESD 201 Class 2 certified) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery rail in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VBAT and chassis ground to clamp surges before they reach LDOs and microcontrollers. Use Value: Withstands 1500W pulses and clamps to ≤13.8V, preventing latch-up or gate oxide damage in 5V/3.3V logic powered from the rail. |
Use Scenario: 4–20mA current loop transmitter connected to PLC analog input subjected to EFT bursts (IEC 61000-4-4). IC Role / Device Role / Timing Role: TVS shunts fast transients across loop terminals, protecting op-amp input stages and current-sense resistors. Use Value: Sub-5ns response ensures clamping initiates before 50ns EFT edge propagates into amplifier bandwidth, preserving measurement integrity. |
| LED Driver Overvoltage Protection | RS-485 Transceiver Bus Line Protection |
Use Scenario: Constant-current LED driver in outdoor signage subjected to lightning-induced surges on AC input lines. IC Role / Device Role / Timing Role: TVS placed across primary-side bulk capacitor to limit voltage rise during line-to-ground transients. Use Value: 175°C TJMAX allows mounting near heat-generating MOSFETs; 1500W rating handles multi-kV induced surges without degradation. |
Use Scenario: RS-485 transceiver in factory automation network exposed to ground potential differences and cable coupling. IC Role / Device Role / Timing Role: Bidirectional TVS installed on differential bus lines (A/B) referenced to local ground to suppress common-mode transients. Use Value: Symmetrical VBR (±8.19–10.00V) ensures equal clamping on both lines, maintaining differential signal integrity during ±1kV ESD events. |
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 | Unidirectional; VBR = 10.0–11.1V; VC = 14.4V @ 11.1A; DO-214AC (SMA) package | Requires explicit polarity placement; lower surge rating (400W); not AEC-Q101 qualified | Select when board space constraints favor surface-mount or when unidirectional protection suffices with external polarity control |
| ON Semiconductor 1.5SMC9.0CA | Bidirectional; VBR = 8.55–9.45V; VC = 13.4V @ 12.6A; DO-214AB (SMC) package; AEC-Q101 qualified | Same function and qualification level but larger SMC footprint; slightly tighter VBR tolerance | Choose when higher thermal mass from SMC package improves long-duration surge handling or when existing layout uses SMC footprints |
Compared with 1.5KE9.1CA R0G, SMAJ9.0A offers smaller size but sacrifices automotive qualification and surge capacity, while 1.5SMC9.0CA matches AEC-Q101 and bidirectional operation but requires PCB rework for larger SMC pads - making 1.5KE9.1CA R0G optimal for cost-sensitive, through-hole automotive modules needing proven DO-201 reliability.
Availability
1.5KE9.1CA R0G is available at Aetrix Electronics and suitable for automotive ECU power rail protection, industrial sensor interface hardening, LED driver overvoltage suppression, and RS-485 bus line safeguarding requiring stable component supply across production lifecycles.
Supply support for 1.5KE9.1CA 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 MOSFETs for automotive, industrial, and consumer markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - 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 indicate in 1.5KE9.1CA R0G?
The 'CA' suffix in 1.5KE9.1CA R0G denotes bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics across its two terminals. This is essential for protecting AC-coupled signals, differential buses like RS-485, or ungrounded power domains where polarity reversal may occur. The 'R0G' denotes green compound and tape-and-reel packaging (1,250 units per reel).
Is 1.5KE9.1CA R0G qualified to AEC-Q101 standards?
Yes, 1.5KE9.1CA R0G is AEC-Q101 qualified - confirmed by Taiwan Semiconductor's official documentation for the 1.5KE series. This qualification includes stress testing for temperature cycling, highly accelerated life testing (HALT), and electrostatic discharge (HBM/MM/CDM), ensuring suitability for automotive powertrain, body control, and infotainment systems where reliability under thermal and electrical stress is mandatory.
How does the clamping voltage of 1.5KE9.1CA R0G compare to its breakdown voltage?
The 1.5KE9.1CA R0G has a minimum breakdown voltage VBR of 8.19V and a maximum clamping voltage VC of 13.8V at 12A (10/1000μs). This 5.6V difference represents the dynamic voltage overshoot during surge conduction - a key design parameter that must remain below the absolute maximum rating of downstream ICs. For example, it safely protects 12V-rated CAN transceivers with 16V VCC max.
Can 1.5KE9.1CA R0G be used in place of a unidirectional TVS like 1.5KE9.1A?
No - 1.5KE9.1CA R0G is bidirectional and cannot substitute for unidirectional 1.5KE9.1A without circuit review. While both share same VBR and PPK, the unidirectional version conducts only in reverse bias and blocks forward current, whereas the CA variant clamps equally in both directions. Using 1.5KE9.1CA R0G in a DC-only path may cause unintended forward conduction if voltage exceeds ~0.7V, risking latch-up or power loss.
What is the maximum steady-state power dissipation for 1.5KE9.1CA R0G?
The maximum steady-state power dissipation (PD) for 1.5KE9.1CA R0G is 5W at lead temperature TL = 75°C with 0.375" (9.5mm) lead length mounted on a 0.6" × 0.6" copper pad. This rating applies only to continuous DC or low-frequency conditions - not surge events. Under normal operation with VWM = 7.37V, leakage remains <1μA, resulting in negligible static power (<7.4μW), so thermal design focuses solely on transient energy absorption.
1.5KE9.1CA 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):
- 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 R0G FAQ
1.How can I place an order for 1.5KE9.1CA R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CA 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 1.5KE9.1CA R0G reliable?
The price and inventory of 1.5KE9.1CA R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1CA R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CA R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CA R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CA R0G?
1.5KE9.1CA R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CA 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 1.5KE9.1CA R0G?
For technical support, including 1.5KE9.1CA R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CA R0G requirements.
6.How does Aetrix verify that 1.5KE9.1CA R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CA 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 1.5KE9.1CA R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CA R0G?
All 1.5KE9.1CA R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CA 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 1.5KE9.1CA R0G part is unused and in its original packaging.
Return procedure for 1.5KE9.1CA R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CA R0G Tags
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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