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Taiwan Semiconductor Corporation 1.5KE9.1CAHR0G
- Part No.:
- 1.5KE9.1CAHR0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CAHR0G.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,811
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Product details
Overview
1.5KE9.1CAHR0G 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 50A peak pulse current, and AEC-Q101 qualification for automotive use. It protects power rails and signal lines against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE9.1CAHR0G datasheet, 1.5KE9.1CAHR0G pinout, 1.5KE9.1CAHR0G application, or 1.5KE9.1CAHR0G equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, JEDEC-compliant surge ratings, and automotive-grade reliability data - all confirmed for the exact 1.5KE9.1CAHR0G variant.
Technical Context
The 1.5KE9.1CAHR0G is a silicon avalanche diode designed for unidirectional or bidirectional transient suppression. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating systems, with identical VBR min/max (8.19V–10.0V) and VC (13.8V @ IPP = 50A) in both polarities.
It operates across –55°C to +175°C junction temperature, supports 10/1000μs waveform compliance per IEC 61000-4-5, meets ISO 7637-2 immunity requirements, and exhibits low dynamic impedance (<1Ω typical) and sub-nanosecond response time (<5ns for bidirectional mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0mA | 8.19–10.0V: Ensures reliable avalanche initiation within ±10% tolerance at low test current. |
| VWM | 7.37V: Maximum continuous reverse operating voltage before leakage exceeds 1µA. |
| VC @ IPP = 50A | 13.8V: Clamped voltage during 1500W transient, limiting downstream IC stress to safe levels. |
| PPK | 1500W: Peak pulse power handling at TA = 25°C, derated linearly above ambient per Fig.2. |
| IPP (10/1000μs) | 50A: Maximum non-repetitive surge current the device safely clamps without failure. |
| Junction Temp Range | –55°C to +175°C: Enables deployment in under-hood automotive environments and industrial power supplies. |
| AEC-Q101 Qualified | Yes: Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
Package: DO-201 axial-leaded plastic case with cathode band marking (bidirectional version has no polarity marking; terminals are symmetric). Molding compound complies with UL 94V-0; leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetric) | Transient conduction path | Both terminals function identically in bidirectional mode; no fixed anode/cathode designation - clamps voltage exceeding ±VBR in either direction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, and floating grounds without polarity concerns. |
| 1500W surge rating (10/1000μs) | Handles high-energy load dump and inductive switching events common in 12V/24V automotive systems. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery line transients), and Pulse 3a/3b (switching noise). |
| AEC-Q101 qualification | Confirms reliability for automotive ECUs, body control modules, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery line 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 power rail and ground to clamp transients before they reach MCU power pins. Use Value: Limits rail voltage to ≤13.8V during 50A surges, preventing brownout or latch-up in 5V/3.3V regulators and microcontrollers. | Use Scenario: 4–20mA current loop input of PLC analog module subjected to EFT bursts (IEC 61000-4-4) and cable coupling. IC Role / Device Role / Timing Role: TVS mounted across input terminals to shunt fast transients before reaching op-amp front-end and ADC. Use Value: Sub-5ns response ensures clamping occurs before sensitive amplifier stages saturate or damage. |
| LED Driver Output Protection | USB-C Power Delivery Line Protection |
Use Scenario: High-side switch output driving automotive LED headlamps, subject to inductive kickback during PWM switching. IC Role / Device Role / Timing Role: TVS placed across LED load to absorb reverse EMF from coil de-energization. Use Value: 1500W rating sustains repeated 8.3ms half-sine surges up to 200A (IFSM), protecting MOSFET drain-source junctions. | Use Scenario: VBUS line in USB-C PD port exposed to hot-plug transients and ESD events per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: Bidirectional TVS installed between VBUS and GND to clamp both positive and negative excursions. Use Value: 7.37V VWM allows normal 5–20V PD operation while clamping >13.8V faults - compatible with USB PD 3.1 specification margins. |
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; 9.0V nominal VBR; DO-214AC (SMA) package; 400W PPK. | Lower power rating and unidirectional only - unsuitable for AC or floating bus protection. | Select only for cost-sensitive, low-energy DC rail protection where AEC-Q101 is not required. |
| ON Semiconductor 1.5KE9.1C | Same 1.5KE9.1CA family, but lacks AEC-Q101 qualification and H-suffix packaging traceability. | No automotive qualification - limited to commercial/industrial use; may not meet OEM PPAP requirements. | Acceptable for non-automotive designs where full AEC-Q101 documentation and green compound (G suffix) are unnecessary. |
Compared with Littelfuse SMAJ9.0A and ON Semi 1.5KE9.1C, the 1.5KE9.1CAHR0G uniquely combines bidirectional operation, 1500W surge capacity, AEC-Q101 validation, and DO-201 mechanical robustness - making it the only option qualified for under-hood automotive power rail protection per ISO 7637-2.
Availability
1.5KE9.1CAHR0G is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC analog inputs, LED driver outputs, and USB-C PD power line protection requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for 1.5KE9.1CAHR0G 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.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust DO-201 packaging for harsh environments.
FAQ
What does the 'H' and 'R0G' suffix mean in 1.5KE9.1CAHR0G?
The 'H' suffix indicates AEC-Q101 qualification per automotive reliability standards. 'R0G' denotes green molding compound compliant with RoHS and halogen-free requirements per IEC 61249-2-21. The 'C' confirms bidirectional configuration. Together, 1.5KE9.1CAHR0G is a fully automotive-grade, environmentally compliant, bidirectional TVS diode - distinct from commercial variants like 1.5KE9.1C or 1.5KE9.1CA.
Is 1.5KE9.1CAHR0G unidirectional or bidirectional?
1.5KE9.1CAHR0G is bidirectional. The 'C' in the part number explicitly designates bidirectional capability, meaning it provides symmetrical clamping for both positive- and negative-going transients. Unlike unidirectional types (e.g., 1.5KE9.1A), it has no cathode band and functions identically across both terminals - essential for protecting AC-coupled circuits, differential buses, and floating grounds.
What is the maximum clamping voltage of 1.5KE9.1CAHR0G under surge conditions?
The maximum clamping voltage (VC) of 1.5KE9.1CAHR0G is 13.8V at 50A peak pulse current (10/1000μs waveform). This value is measured per JEDEC test conditions and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events - critical for ensuring protected ICs remain within absolute maximum ratings.
Can 1.5KE9.1CAHR0G be used in place of 1.5KE9.1C in existing designs?
Yes, 1.5KE9.1CAHR0G is a direct functional and mechanical replacement for 1.5KE9.1C, sharing identical electrical specs, DO-201 package, and pinout. However, 1.5KE9.1CAHR0G adds AEC-Q101 qualification and RoHS/halogen-free compliance (R0G), making it suitable for automotive applications where the base 1.5KE9.1C is not approved. No PCB changes are required.
Does 1.5KE9.1CAHR0G meet ISO 7637-2 Pulse 5a (load dump) requirements?
No - 1.5KE9.1CAHR0G is rated for ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b, but not Pulse 5a (load dump), which requires ≥300V clamping capability and sustained energy handling beyond 1500W. For Pulse 5a, higher-voltage TVS like 1.5KE33CA or dedicated load dump suppressors are required. The 1.5KE9.1CAHR0G is intended for lower-energy transients in 12V systems.
1.5KE9.1CAHR0G 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE9.1CAHR0G FAQ
1.How can I place an order for 1.5KE9.1CAHR0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CAHR0G 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 1.5KE9.1CAHR0G reliable?
The price and inventory of 1.5KE9.1CAHR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1CAHR0G is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CAHR0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CAHR0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CAHR0G?
1.5KE9.1CAHR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CAHR0G 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 1.5KE9.1CAHR0G?
For technical support, including 1.5KE9.1CAHR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CAHR0G requirements.
6.How does Aetrix verify that 1.5KE9.1CAHR0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CAHR0G 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 1.5KE9.1CAHR0G meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CAHR0G?
All 1.5KE9.1CAHR0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CAHR0G, 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 1.5KE9.1CAHR0G part is unused and in its original packaging.
Return procedure for 1.5KE9.1CAHR0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CAHR0G Tags
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