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Vishay General Semiconductor - Diodes Division 1.5KE250CA-E3/51
- Part No.:
- 1.5KE250CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE250CA-E3/51.pdf
- Description:
- TVS DIODE 214VWM 344VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,498
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Product details
Overview
1.5KE250CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 250 V standoff voltage (VWM), 237–263 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 344 V at 4.4 A, and operates from –55 °C to +175 °C. It protects MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5KE250CA-E3/51 datasheet, 1.5KE250CA-E3/51 pinout, 1.5KE250CA-E3/51 application, or 1.5KE250CA-E3/51 equivalent, this page delivers verified electrical specs, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and direct alternatives for industrial power supply, automotive body control, and telecom line protection designs.
Technical Context
This device uses 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 concerns, unlike unidirectional TVS diodes requiring cathode orientation.
It delivers 1500 W peak pulse power under standardized 10/1000 µs waveform with 0.01% duty cycle, and exhibits a temperature coefficient of VBR at +0.110 %/°C - critical for stable clamping across wide ambient ranges in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 214 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown |
| VBR min/max | 237 V / 263 V at 1 mA - precise breakdown threshold ensuring predictable turn-on during overvoltage events |
| VC @ IPPM | 344 V at 4.4 A - clamped voltage during full-rated surge; determines protected circuit's maximum stress level |
| PPPM | 1500 W - peak transient energy absorption capability using 10/1000 µs waveform; meets IEC 61000-4-5 Level 4 |
| TJ max | +175 °C - extended junction temperature rating enabling use in under-hood automotive or high-power industrial enclosures |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; informs heatsinking requirements for sustained surge duty |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Bidirectional symmetry means no functional distinction between anode and cathode; terminals are electrically interchangeable |
| Cathode | Current exit terminal in forward bias | No color band marking - physical polarity is irrelevant; device functions identically regardless of orientation in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable breakdown characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against severe transients including indirect lightning surges per IEC 61000-4-5 |
| Clamping time <1 ns | Responds faster than MOVs or GDTs, preventing voltage overshoot that damages sensitive CMOS inputs |
| Operating TJ range –55 °C to +175 °C | Validates use in engine control units, industrial motor drives, and outdoor telecom equipment without derating |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protects DC input rails of programmable logic controllers (PLCs) and industrial SMPS against load dump and inductive kickback from solenoids and contactors. IC Role / Device Role / Timing Role: Standoff-mode TVS placed across input terminals to clamp transients before they reach upstream rectifiers and controller ICs. Use Value: Withstands 1500 W surges while limiting voltage to ≤344 V, preserving 400 V-rated electrolytic capacitors and 600 V MOSFETs. | Use Scenario: Shields LIN bus transceivers and microcontroller I/O pins in door modules and seat control units from battery voltage spikes and ESD. IC Role / Device Role / Timing Role: Bidirectional clamping element on bidirectional data lines, eliminating need for dual unidirectional devices or polarity-aware layout. Use Value: Symmetrical 214 V standoff ensures equal protection during positive and negative transients, matching LIN physical layer voltage swing requirements. |
| Telecom Line Interface | Renewable Energy Inverter DC Link |
Use Scenario: Safeguards Ethernet PHYs and PoE injectors connected to outdoor cabling exposed to induced lightning surges. IC Role / Device Role / Timing Role: Primary surge suppression stage ahead of secondary protection (e.g., polymer PPTC + capacitor filtering). Use Value: Fast <1 ns response prevents damage to 100BASE-TX transformers and magnetics rated only to 250 V RMS. | Use Scenario: Guards DC link capacitors and IGBT gate drivers in solar inverters subjected to grid fault-induced voltage reversals. IC Role / Device Role / Timing Role: Bidirectional TVS across DC+ and DC− rails to absorb reverse-polarity surges during islanding events or ground faults. Use Value: 175 °C max junction temperature supports operation near heat-generating IGBT stacks without thermal runaway risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ250CA | Lower peak power (600 W), smaller SMB package (vs. DO-201AD), higher clamping ratio (VC/VBR ≈ 1.45 vs. 1.35) | Preferred for space-constrained PCBs where 600 W suffices; not suitable for 1500 W IEC 61000-4-5 Level 4 compliance | Select when board area is limited and surge threat level is moderate (e.g., indoor consumer electronics) |
| 1.5SMC250CA | Same 1500 W rating and DO-214AB package; slightly higher VBR (245–275 V) and VC (352 V); RoHS-compliant SMC molding | Offers identical surge capability in surface-mount format; eliminates through-hole assembly but requires reflow-compatible layout | Choose for automated SMT production where DO-201AD axial insertion is undesirable |
Compared with 1.5KE250CA-E3/51, SMBJ250CA trades peak power and thermal mass for compactness, while 1.5SMC250CA retains full 1500 W capability in a surface-mount footprint - both require layout revision and thermal validation, as neither is pin-compatible or drop-in replaceable.
Availability
1.5KE250CA-E3/51 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom line interface, and renewable energy inverter DC link applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1.5KE250CA-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, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven silicon-based clamping.
FAQ
What is the clamping voltage of the 1.5KE250CA-E3/51 under full-rated surge current?
The 1.5KE250CA-E3/51 clamps to 344 V at its peak pulse current of 4.4 A (10/1000 µs waveform). This value is measured per JEDEC standards and represents the maximum voltage seen by downstream circuitry during a full 1500 W transient event. The clamping voltage directly determines whether protected components - such as 400 V-rated bulk capacitors or 600 V MOSFETs - remain within their absolute maximum ratings. For the 1.5KE250CA-E3/51, this clamping performance is guaranteed across its full operating temperature range.
Is the 1.5KE250CA-E3/51 suitable for automotive applications?
Yes, the 1.5KE250CA-E3/51 is qualified for automotive use in non-AEC-Q101 configurations, supporting under-hood and body electronics where temperature resilience and surge immunity are critical. While the base 1.5KE250CA-E3/51 variant is commercial-grade, Vishay offers AEC-Q101-qualified versions (e.g., 1.5KE250CAHE3_B) with identical electrical specs and enhanced process controls. The 1.5KE250CA-E3/51 itself operates reliably from –55 °C to +175 °C and withstands solder dip up to 275 °C for 10 s, meeting key automotive assembly and environmental requirements.
How does the bidirectional design of the 1.5KE250CA-E3/51 affect PCB layout?
The 1.5KE250CA-E3/51 has no polarity marking and functions identically in either orientation, simplifying PCB layout by eliminating cathode alignment checks and enabling placement flexibility on AC-coupled or floating nodes. Unlike unidirectional TVS diodes, it requires no orientation-dependent routing or silkscreen indicators. This symmetry reduces assembly errors and supports compact two-terminal protection schemes on differential buses like LIN or isolated RS-485. The 1.5KE250CA-E3/51's bidirectional behavior is intrinsic to its internal structure - confirmed by identical VBR and VC values in both directions per Vishay's datasheet.
What is the thermal resistance of the 1.5KE250CA-E3/51, and how does it impact surge handling?
The 1.5KE250CA-E3/51 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15.4 °C/W. These values define how quickly heat dissipates during repetitive surges: at 0.01% duty cycle, self-heating remains negligible, but at higher repetition rates, junction temperature rise must be calculated using RθJA and average power. For single-event protection (e.g., lightning strike), thermal mass dominates - the 1.5KE250CA-E3/51's DO-201AD package provides sufficient thermal inertia to absorb 1500 W without exceeding 175 °C junction limit. Layouts should ensure ≥9.5 mm lead length for accurate RθJL-based cooling.
Does the 1.5KE250CA-E3/51 meet UL recognition standards?
Yes, the 1.5KE250CA-E3/51 carries Underwriters Laboratories (UL) recognition under file E136766 for both unidirectional and bidirectional TVS devices, compliant with UL 497B for signal and power line protectors. This certification validates its safety performance in end-equipment - including flammability (UL 94 V-0 epoxy molding), surge endurance, and insulation integrity. UL recognition applies to the entire 1.5KE family, and the 1.5KE250CA-E3/51 specifically meets these requirements as a commercial-grade, RoHS-compliant device with matte tin-plated leads. No additional agency testing is required for UL-listed system integration.
1.5KE250CA-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):
- 214V
- Voltage - Breakdown (Min):
- 237V
- Voltage - Clamping (Max) @ Ipp:
- 344V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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
1.5KE250CA-E3/51 FAQ
1.How can I place an order for 1.5KE250CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE250CA-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 1.5KE250CA-E3/51 reliable?
The price and inventory of 1.5KE250CA-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 1.5KE250CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE250CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE250CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE250CA-E3/51?
1.5KE250CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE250CA-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 1.5KE250CA-E3/51?
For technical support, including 1.5KE250CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE250CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE250CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE250CA-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 1.5KE250CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE250CA-E3/51?
All 1.5KE250CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE250CA-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 1.5KE250CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE250CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE250CA-E3/51 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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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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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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