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Vishay General Semiconductor - Diodes Division 1.5KE9.1CAHE3/51
- Part No.:
- 1.5KE9.1CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CAHE3/51.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,402
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Product details
Overview
1.5KE9.1CAHE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 13.4 V at 112 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE9.1CAHE3/51 datasheet, 1.5KE9.1CAHE3/51 pinout, 1.5KE9.1CAHE3/51 application, or 1.5KE9.1CAHE3/51 equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, bi-directional clamping behavior, thermal resistance (RθJA = 75 °C/W), and RoHS-compliant HE3 packaging - all critical for automotive and industrial surge protection design-in.
Technical Context
This bi-directional TVS diode employs a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its symmetrical breakdown ensures identical clamping performance in both polarities, eliminating polarity marking on the case.
Rated for 1500 W peak pulse power with 10/1000 µs waveform and derated above 25 °C per Fig. 2, it supports repetitive surge events at ≤0.01% duty cycle. The device meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability requirements via molded epoxy encapsulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA test current - defines precise voltage threshold where clamping initiates in either direction |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 13.4 V at 112 A peak pulse - actual clamped voltage seen by protected circuit during worst-case transient |
| PPPM | 1500 W (10/1000 µs) - surge energy handling capacity without failure under standardized lightning-surge waveform |
| IPPM | 112 A - maximum non-repetitive surge current the device safely clamps without degradation |
| TJ max. | +175 °C - enables operation in under-hood automotive or high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for PCB layout and heatsinking decisions |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bi-directional) | Transient conduction path | No polarity marking; terminals are functionally identical - conducts equally in both directions during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under humidity and thermal stress |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events when properly mounted on PCB with adequate trace width |
| Sub-nanosecond response | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and EU RoHS Directive 2011/65/EU without exemptions |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across differential signal pair or supply rail to shunt surge energy before it reaches sensitive front-end circuitry. Use Value: Maintains signal fidelity during 10/1000 µs transients up to 112 A while holding clamped voltage to 13.4 V - below absolute maximum ratings of typical 12 V automotive ICs. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff protector mounted directly at connector entry point to divert >1 kV transients before propagation into isolation barriers or microcontroller GPIOs. Use Value: Delivers 1500 W surge handling with 7.78 V working voltage - compatible with 24 V nominal systems while providing margin against brownout conditions. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side protection on Ethernet PHY or RS-485 transceiver lines exposed to ESD and induced lightning surges in outdoor telecom equipment. IC Role / Device Role / Timing Role: Fast-acting bi-directional clamp placed between differential data lines and ground to suppress common-mode transients without distorting signal edges. Use Value: Symmetrical 9.1 V breakdown ensures balanced clamping on both lines, minimizing skew and maintaining signal integrity up to 100 Mbps data rates. |
Use Scenario: Primary-side transient suppression on AC-DC adapter input rectifier outputs to prevent capacitor overvoltage and bridge rectifier failure during mains surges. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing line-to-line and line-to-ground transients exceeding MOV clamping capability during fast-rising events. Use Value: 13.4 V clamping voltage protects 16 V-rated bulk capacitors and withstands repeated 1500 W pulses - extending adapter lifetime in regions with unstable grid quality. |
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 PPPM (600 W), smaller SMB package (vs. axial 1.5KE), VC = 14.4 V @ 41.7 A | Better suited for space-constrained PCBs but requires derating for >1 kV surge compliance | Select when board area is critical and peak surge current remains ≤42 A |
| 1.5KE9.1C | Same electrical specs and package, but lacks HE3 suffix - commercial grade only, no AEC-Q101 qualification or JESD 201 Class 2 whisker resistance | Acceptable for non-automotive industrial use where extended reliability validation is not required | Choose only for cost-sensitive, non-automotive applications with full lifecycle traceability not mandated |
Compared with SMBJ9.0CA and 1.5KE9.1C, the 1.5KE9.1CAHE3/51 uniquely combines automotive-grade AEC-Q101 qualification, 1500 W surge capacity, and axial-leaded mechanical robustness - making it the only option among the three validated for under-hood automotive deployment and high-energy industrial surge environments.
Availability
1.5KE9.1CAHE3/51 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, telecom line interface safeguarding, and consumer power adapter input surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE9.1CAHE3/51 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5KE family was engineered specifically for high-energy transient suppression in harsh environments, emphasizing AEC-Q101 compliance, repeatable clamping performance, and robust thermal management in axial-leaded form factors.
FAQ
What is the breakdown voltage tolerance of the 1.5KE9.1CAHE3/51?
The 1.5KE9.1CAHE3/51 has a specified breakdown voltage range of 8.65 V to 9.55 V at 1.0 mA test current, yielding ±5% tolerance around the nominal 9.1 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 12 V automotive circuits without premature conduction during normal operation.
Is the 1.5KE9.1CAHE3/51 suitable for automotive applications?
Yes, the 1.5KE9.1CAHE3/51 is AEC-Q101 qualified and carries the HE3 suffix indicating compliance with JESD 201 Class 2 whisker resistance and RoHS requirements. Its –55 °C to +175 °C operating junction temperature range, glass-passivated junction, and 1500 W surge rating make it approved for under-hood and powertrain-related ECU protection per ISO 7637-2 and ISO 16750-2 standards.
How does the bi-directional configuration of the 1.5KE9.1CAHE3/51 affect its use in circuit design?
The bi-directional configuration of the 1.5KE9.1CAHE3/51 means it functions identically in both polarities - no cathode marking is present, and it clamps symmetrically above ±9.1 V. This eliminates polarity concerns in AC-coupled or differential signal paths (e.g., RS-485, CAN), simplifies inventory, and avoids misorientation during manual assembly or automated placement.
What is the maximum clamping voltage of the 1.5KE9.1CAHE3/51 during a surge event?
The 1.5KE9.1CAHE3/51 clamps to a maximum of 13.4 V at its rated peak pulse current of 112 A (10/1000 µs waveform). This value represents the worst-case voltage imposed on the protected circuit during a full-energy surge, ensuring compatibility with 12 V systems where downstream ICs typically tolerate up to 16 V absolute maximum ratings.
Does the 1.5KE9.1CAHE3/51 require a heatsink for standard operation?
No external heatsink is required for transient suppression duty, as the 1.5KE9.1CAHE3/51 handles short-duration surges without sustained power dissipation. Its RθJA of 75 °C/W applies to steady-state conditions; however, for continuous power dissipation above 6.5 W (its rated PD), PCB copper area and thermal vias must be designed per Vishay's thermal guidelines in Document 88301, Figure 5.
1.5KE9.1CAHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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):
- 112A
- 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:
- 1.5KE
1.5KE9.1CAHE3/51 FAQ
1.How can I place an order for 1.5KE9.1CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CAHE3/51 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 1.5KE9.1CAHE3/51 reliable?
The price and inventory of 1.5KE9.1CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CAHE3/51?
1.5KE9.1CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CAHE3/51 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 1.5KE9.1CAHE3/51?
For technical support, including 1.5KE9.1CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE9.1CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CAHE3/51 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 1.5KE9.1CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CAHE3/51?
All 1.5KE9.1CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CAHE3/51, 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 1.5KE9.1CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE9.1CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CAHE3/51 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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D12V0L1B2LP-7B
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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