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Vishay General Semiconductor - Diodes Division 1.5KE120CA-E3/51
- Part No.:
- 1.5KE120CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE120CA-E3/51.pdf
- Description:
- TVS DIODE 102VWM 165VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,838
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Product details
Overview
1.5KE120CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 120 V breakdown voltage (VBR = 114–126 V), 1500 W peak pulse power (10/1000 µs), clamping voltage of 165 V at 9.1 A, 1.0 µA max reverse leakage at 102 V, and operates from –55 °C to +175 °C - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE120CA-E3/51 datasheet, 1.5KE120CA-E3/51 pinout, 1.5KE120CA-E3/51 application, or 1.5KE120CA-E3/51 equivalent, this page delivers verified electrical specs, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and direct alternatives for ESD/lightning surge protection design validation.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping across both polarities without polarity marking, supporting AC-coupled lines and differential buses.
Rated for 1500 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, it sustains 6.5 W steady-state dissipation on infinite heatsink and derates linearly above 25 °C ambient - with thermal resistance of 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 114 V / 126 V - ensures reliable conduction onset within ±5% tolerance at 1 mA test current |
| VWM | 102 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 165 V at 9.1 A - clamping voltage limits downstream voltage stress during 10/1000 µs transients |
| PPPM | 1500 W - peak surge handling capacity for lightning-induced or inductive-switching events |
| TJ range | –55 °C to +175 °C - supports under-hood automotive and high-temp industrial environments |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, RoHS-compliant molded epoxy body rated UL 94 V-0 |
| Leakage @ VWM | ≤1.0 µA - minimizes standby power loss in always-on circuits |
Pinout & Package
1.5KE120CA-E3/51 uses the standard axial-leaded DO-201AD package (Case Style 1.5KE), with no polarity marking - consistent with bidirectional operation. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and qualified for 275 °C solder dip (10 s max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional terminal pair | Identical clamping behavior in either direction; no cathode band or polarity identification required |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Sub-nanosecond response | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors |
| AEC-Q101 qualification option | Available in HE3 variant (e.g., 1.5KE120CAHE3_B) for automotive-grade production use |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and transportation equipment |
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: Bidirectional voltage clamp placed across signal/power rails upstream of protected ICs. Use Value: Limits transient voltage to ≤165 V during 10/1000 µs surges, preserving signal integrity and preventing latch-up in 5 V/12 V interface ICs. | Use Scenario: Shielding digital input modules in programmable logic controllers from induced surges on 24 V DC field wiring. IC Role / Device Role / Timing Role: Standoff protector mounted at connector entry point, shunting energy before reaching optocouplers or microcontrollers. Use Value: Withstands repetitive 1500 W surges while maintaining <1 µA leakage at 102 V, enabling low-power monitoring without false triggers. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY front-ends and DSL line drivers against lightning-induced common-mode transients on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary-level TVS in hybrid protection circuit (with gas discharge tube and series impedance). Use Value: Symmetrical 114–126 V breakdown ensures balanced clamping on differential pairs, reducing EMI generation during clamping. | Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters to prevent damage from capacitor discharge or feedback loop faults. IC Role / Device Role / Timing Role: Clamp device across DC output rails (e.g., 12 V, 19 V), activated only during fault conditions. Use Value: 175 °C max junction temperature allows operation near transformer heat sources without thermal shutdown or parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | DO-214AA package (SMB), lower PPPM = 600 W, same VBR range (114–126 V), higher IPPM = 4.3 A | Surface-mount alternative for space-constrained PCBs; not suitable for high-energy 1500 W surges | Select when board area is limited and surge threat level is ≤600 W (e.g., consumer USB ports) |
| 1.5SMC120CA | DO-214AB (SMC) package, identical PPPM = 1500 W, same VBR/VC, but higher thermal resistance (RθJA ≈ 110 °C/W) | Surface-mount drop-in for automated assembly; requires larger copper pour for thermal management | Choose for SMT production where axial leads are incompatible, and thermal layout supports ≥2 in² 2-oz copper |
Compared with 1.5KE120CA-E3/51, SMBJ120CA trades peak power headroom for compactness, while 1.5SMC120CA retains full 1500 W capability but demands more careful thermal design due to higher junction-to-ambient resistance.
Availability
1.5KE120CA-E3/51 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE120CA-E3/51 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, ruggedness, and application-specific qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal fidelity or thermal stability.
FAQ
What is the breakdown voltage tolerance of the 1.5KE120CA-E3/51?
The 1.5KE120CA-E3/51 has a specified breakdown voltage range of 114 V to 126 V at 1 mA test current, representing a ±5% tolerance around the nominal 120 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 12 V and 24 V systems where overvoltage margins are narrow. The 1.5KE120CA-E3/51 maintains this specification per Vishay Document 88301 Rev. 09-Aug-2022.
Is the 1.5KE120CA-E3/51 suitable for automotive applications?
Yes - the base 1.5KE120CA-E3/51 is commercial-grade, but its AEC-Q101-qualified variant (e.g., 1.5KE120CAHE3_B) is explicitly approved for automotive use per Vishay's documentation. The 1.5KE120CA-E3/51 itself shares identical electrical and thermal characteristics, making it suitable for non-safety-critical automotive subsystems like infotainment power rails or body control module sensors when qualified by the end customer. Its –55 °C to +175 °C operating range fully covers under-hood thermal requirements.
How does the 1.5KE120CA-E3/51 compare to unidirectional TVS diodes like 1.5KE120A-E3/51?
The 1.5KE120CA-E3/51 is bidirectional, providing symmetrical clamping for AC signals or differential lines, whereas 1.5KE120A-E3/51 is unidirectional with a cathode band and forward voltage drop (~3.5 V). The "CA" suffix denotes bidirectional construction - no polarity marking, identical VBR in both directions, and no DC forward conduction path. This makes the 1.5KE120CA-E3/51 ideal for protecting RS-485, CAN, or Ethernet lines, while 1.5KE120A-E3/51 suits DC power rail clamping where polarity is fixed.
What is the maximum clamping voltage of the 1.5KE120CA-E3/51 at rated surge current?
The 1.5KE120CA-E3/51 exhibits a maximum clamping voltage (VC) of 165 V at its rated peak pulse current (IPPM) of 9.1 A, measured using the standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is guaranteed across the full operating temperature range. The 1.5KE120CA-E3/51 achieves this with low incremental surge resistance, minimizing voltage overshoot beyond VC.
Does the 1.5KE120CA-E3/51 require heatsinking in typical applications?
No active heatsink is required for transient suppression, as the 1.5KE120CA-E3/51 handles energy in short pulses (≤1 ms). However, its steady-state power dissipation is limited to 6.5 W on an infinite heatsink at 75 °C lead temperature. In continuous operation (e.g., high-frequency surge repetition), PCB copper area and thermal vias become critical - the 1.5KE120CA-E3/51 benefits from ≥1 in² of 2-oz copper connected to both leads to manage average power and prevent junction overheating beyond 175 °C.
1.5KE120CA-E3/51 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):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- 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
1.5KE120CA-E3/51 FAQ
1.How can I place an order for 1.5KE120CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE120CA-E3/51 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 1.5KE120CA-E3/51 reliable?
The price and inventory of 1.5KE120CA-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE120CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE120CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE120CA-E3/51 transactions.
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1.5KE120CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE120CA-E3/51 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 1.5KE120CA-E3/51?
For technical support, including 1.5KE120CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE120CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE120CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE120CA-E3/51 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 1.5KE120CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE120CA-E3/51?
All 1.5KE120CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE120CA-E3/51, 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 1.5KE120CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE120CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE120CA-E3/51 Tags
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