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Vishay General Semiconductor - Diodes Division 1.5KE9.1CA-E3/1
- Part No.:
- 1.5KE9.1CA-E3/1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CA-E3/1.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,050
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Product details
Overview
1.5KE9.1CA-E3/1 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal or power lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 13.4 V at 112 A, and operates from –55 °C to +175 °C - used in automotive sensor line protection and industrial I/O interface surge suppression.
For engineers reviewing the 1.5KE9.1CA-E3/1 datasheet, 1.5KE9.1CA-E3/1 pinout, 1.5KE9.1CA-E3/1 application, or 1.5KE9.1CA-E3/1 equivalent, this page delivers verified electrical specs, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and direct alternatives with documented parameter differences - all validated against Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This device implements a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating circuits without polarity sensitivity, and it meets UL 497B recognition for telecom protector classification (QVGQ2, E136766).
The 1.5KE9.1CA-E3/1 operates under a 10/1000 µs double-exponential surge waveform with 0.01% duty cycle, delivering 112 A peak pulse current while maintaining clamping below 13.4 V - critical for protecting 5 V and 3.3 V logic interfaces against ESD and lightning-induced surges per IEC 61000-4-5 Level 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 7.78 V - maximum continuous working voltage before leakage exceeds 1.0 µA, compatible with 5 V rail systems |
| VC @ IPPM | 13.4 V at 112 A - ensures downstream ICs see no more than 13.4 V during 1500 W transient, preserving 3.3 V/5 V logic integrity |
| PPPM | 1500 W - peak pulse power handling capability per 10/1000 µs waveform, enabling robust lightning surge immunity |
| TJ range | –55 °C to +175 °C - supports under-hood automotive and industrial environments without derating loss |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance enables reliable power dissipation without heatsinking |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded molded epoxy body with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102; RoHS-compliant (E3 suffix), UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward bias | No polarity marking - bidirectional operation means either lead serves as anode or cathode depending on transient polarity |
| Cathode (unmarked end) | Current exit point in forward bias | Identical physical terminal; function reverses dynamically during negative transients - no color band or marking required |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power | Supports IEC 61000-4-5 4 kV/2 Ω combination wave testing without failure or parametric shift |
| Sub-nanosecond response time | Clamps transients within 1 ns - faster than MOVs or polymer-based protectors, preventing latch-up in CMOS ICs |
| AEC-Q101 qualified option available | HE3 variant (e.g., 1.5KE9.1CAHE3_B) meets automotive-grade qualification for engine control and ADAS sensor modules |
| UL 497B recognized (QVGQ2) | Validated for telecom line protection applications including DSL, T1/E1, and PoE-powered interfaces |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensors from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or supply rail to shunt surge energy before reaching sensitive analog front-end or transceiver ICs. Use Value: Maintains VC ≤ 13.4 V during 112 A transients, ensuring sensor ICs remain within absolute maximum ratings and avoid reset or damage. | Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series impedance and filtering to meet IEC 61000-4-4/5 immunity requirements. Use Value: Limits transient voltage to 13.4 V while sustaining 1500 W for 1 ms - sufficient to absorb 2 kV/12 Ω surge without degradation. |
| Telecom Line Surge Protection | Consumer USB Port ESD Protection |
Use Scenario: Front-end protection for DSL modems, VoIP gateways, and Ethernet PHYs connected to outside plant wiring subject to lightning induction. IC Role / Device Role / Timing Role: First-stage TVS on tip/ring lines, operating in conjunction with gas discharge tubes (GDTs) for staged surge coordination. Use Value: UL 497B recognition (QVGQ2) confirms suitability for telecom protector applications; bidirectional symmetry avoids polarity concerns in AC-coupled lines. | Use Scenario: Secondary-level protection on USB 2.0 data lines (D+/D−) and VBUS against contact ESD (IEC 61000-4-2 ±15 kV air/±8 kV contact). IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) clamping device placed after common-mode choke to suppress differential-mode ESD without signal distortion. Use Value: Sub-ns response ensures clamping occurs before ESD pulse couples into host controller; VWM = 7.78 V allows safe operation with 5 V VBUS while protecting 3.3 V PHY circuitry. |
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 (JEDEC DO-214AA), VC = 14.4 V @ 41.7 A | Better suited for space-constrained PCBs but requires derating for >1 kV surges | Select when board area is limited and peak surge energy is ≤600 W; verify thermal margin with RθJA = 110 °C/W |
| 1.5SMC9.0CA | Same PPPM (1500 W), SMC package (DO-214AB), VC = 13.1 V @ 115 A, slightly tighter VBR tolerance (±5% vs. ±5.2%) | Surface-mount alternative with identical surge rating but higher mounting density and reflow compatibility | Choose for automated assembly and improved thermal coupling to copper pour; note 1.5SMC has lower RθJL (12.5 °C/W) |
Compared with 1.5KE9.1CA-E3/1, SMBJ9.0CA trades surge capacity for footprint reduction, while 1.5SMC9.0CA matches power rating in a surface-mount format - both require layout review for thermal path and trace inductance, especially in high-di/dt applications like automotive load dump.
Availability
1.5KE9.1CA-E3/1 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line protection, and consumer USB port ESD protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE9.1CA-E3/1 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained 1500 W surge handling and wide temperature operation are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE9.1CA-E3/1?
The 1.5KE9.1CA-E3/1 has a specified breakdown voltage range of 8.65 V to 9.55 V at 1.0 mA test current, representing a ±5.2% tolerance about the nominal 9.1 V rating. This tolerance is confirmed in Vishay Document #88301, Table "ELECTRICAL CHARACTERISTICS", row for 1.5KE9.1A/1.5KE9.1CA. The device is tested per JEDEC standards and does not include tighter binning unless specified by custom order codes.
Is 1.5KE9.1CA-E3/1 RoHS compliant and lead-free?
Yes, the 1.5KE9.1CA-E3/1 is RoHS compliant and lead-free, as indicated by the "E3" suffix per Vishay's ordering nomenclature. The E3 designation confirms compliance with JEDEC J-STD-020 moisture sensitivity level (MSL) and JESD 201 Class 1A whisker resistance testing. Full material declarations are available in Vishay's compliance portal under document #99912.
Does 1.5KE9.1CA-E3/1 have AEC-Q101 qualification?
The base 1.5KE9.1CA-E3/1 is commercial-grade and not AEC-Q101 qualified. However, the variant 1.5KE9.1CAHE3_B is explicitly listed in Vishay Document #88301 (page 3, Note 2) as AEC-Q101 qualified for automotive use. Engineers requiring automotive qualification must specify the HE3_B suffix - the E3/1 version lacks that certification.
What is the clamping voltage of 1.5KE9.1CA-E3/1 at its rated peak pulse current?
The 1.5KE9.1CA-E3/1 clamps to a maximum of 13.4 V at its rated peak pulse current of 112 A (10/1000 µs waveform), as published in the "ELECTRICAL CHARACTERISTICS" table of Vishay Document #88301. This value is measured under standardized surge conditions and represents worst-case voltage seen by protected circuitry during full-rated transient events.
Can 1.5KE9.1CA-E3/1 be used in AC line protection applications?
No, the 1.5KE9.1CA-E3/1 is not rated for AC mains (120/230 VAC) protection due to its low VWM of 7.78 V and absence of UL 1449 or IEC 61643-11 certification for AC surge protective devices. It is intended for low-voltage DC signal/power line protection only - e.g., automotive 12 V systems, industrial 24 V I/O, or telecom 48 V lines - where working voltage remains below 8 V.
1.5KE9.1CA-E3/1 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE9.1CA-E3/1 FAQ
1.How can I place an order for 1.5KE9.1CA-E3/1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CA-E3/1 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-E3/1 reliable?
The price and inventory of 1.5KE9.1CA-E3/1 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-E3/1 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CA-E3/1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CA-E3/1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CA-E3/1?
1.5KE9.1CA-E3/1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CA-E3/1 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-E3/1?
For technical support, including 1.5KE9.1CA-E3/1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CA-E3/1 requirements.
6.How does Aetrix verify that 1.5KE9.1CA-E3/1 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CA-E3/1 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-E3/1 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CA-E3/1?
All 1.5KE9.1CA-E3/1 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CA-E3/1, 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-E3/1 part is unused and in its original packaging.
Return procedure for 1.5KE9.1CA-E3/1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CA-E3/1 Tags
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