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Vishay General Semiconductor - Diodes Division 1.5KE300A-E3/73
- Part No.:
- 1.5KE300A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300A-E3/73.pdf
- Description:
- TVS DIODE 256VWM 414VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,383
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Product details
Overview
1.5KE300A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 300 V standoff voltage (VWM), 315 V maximum breakdown voltage (VBR), 414 V clamping voltage at 3.6 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in industrial power supplies and automotive ECUs.
For engineers reviewing the 1.5KE300A-E3/73 datasheet, 1.5KE300A-E3/73 pinout, 1.5KE300A-E3/73 application, or 1.5KE300A-E3/73 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJL = 15.4 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and compatibility with J-STD-002 solderability standards.
Technical Context
This TVS diode uses a glass passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional configuration provides cathode-marked polarity for DC rail protection, with clamping action triggered when reverse voltage exceeds 300 V standoff level.
The device delivers 1500 W peak pulse power handling per JEDEC-standard 10/1000 µs waveform at 0.01% duty cycle, with derating above 25 °C ambient per Fig. 2 and 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 |
|---|---|
| VWM | 300 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC working margin. |
| VBR (min/max) | 285 V / 315 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 414 V - Clamped voltage at 3.6 A peak pulse current; determines protected circuit's maximum transient exposure. |
| PPPM | 1500 W - Peak pulse power dissipation capability with 10/1000 µs waveform; supports high-energy surge immunity. |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against inrush events. |
| TJ max. | +175 °C - Maximum junction temperature; enables operation in under-hood automotive or high-temperature industrial environments. |
| RθJL | 15.4 °C/W - Junction-to-lead thermal resistance; informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.042" (1.07 mm) lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surges up to 200 A. |
| Cathode (banded end) | Reverse-biased clamping terminal | Marked with color band; connected to higher-potential side; initiates clamping when reverse voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable breakdown characteristics and long-term reliability under repeated surge stress. |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity without external series impedance. |
| Clamping response time <1 ns | Protects downstream ICs before transient energy couples into sensitive nodes. |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and J-STD-002 solderability for automated assembly. |
| –55 °C to +175 °C operating range | Validates use in engine control units, industrial motor drives, and outdoor telecom equipment. |
Applications
| Industrial Power Supply Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 24 V DC input stage of programmable logic controllers (PLCs) against load dump and inductive switching transients. IC Role / Device Role: Primary overvoltage clamp on main DC bus, placed upstream of DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤414 V during 1500 W surges, preventing damage to 36 V-rated input capacitors and 5 V LDO regulators. | Use Scenario: Safeguarding CAN transceiver power pins and sensor supply lines in engine bay modules exposed to ISO 7637-2 pulses. IC Role / Device Role: Unidirectional TVS on 12 V battery rail and 5 V sensor reference lines. Use Value: Withstands 200 A forward surge and clamps reverse transients to 414 V, preserving signal integrity and MCU reset stability. |
| Telecom Remote Terminal Unit | Renewable Energy Inverter DC Link |
Use Scenario: Shielding Ethernet PHY power and RS-485 data lines in outdoor base station cabinets subjected to lightning-induced surges. IC Role / Device Role: Secondary-level TVS on isolated DC-DC outputs feeding communication ICs. Use Value: Fast <1 ns response prevents latch-up in PHY ICs; 175 °C rating accommodates sealed cabinet thermal profiles. | Use Scenario: Protecting IGBT gate driver supplies and auxiliary DC rails in solar string inverters experiencing grid-switching transients. IC Role / Device Role: Standoff-rated TVS on 300 V intermediate bus feeding isolated gate drivers. Use Value: 300 V VWM aligns with nominal DC link voltage; 414 V VC ensures margin below 600 V IGBT blocking rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300A | Lower peak pulse power (600 W), smaller SMB package (vs. axial 1.5KE), higher RθJA (110 °C/W) | Better suited for space-constrained PCBs with moderate surge exposure (IEC 61000-4-5 Level 2) | Select SMBJ300A only if board area is critical and surge energy does not exceed 600 W capability. |
| 1.5KE300CA | Bidirectional variant; identical VWM, VBR, and VC ratings but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose 1.5KE300CA only when protecting bidirectional interfaces (e.g., RS-232, analog sensors with AC signals). |
Compared with SMBJ300A and 1.5KE300CA, the 1.5KE300A-E3/73 offers superior 1500 W surge handling and lower thermal resistance in an axial through-hole package - making it optimal for high-reliability, high-energy industrial and automotive power rail protection where PCB layout allows axial mounting and full 1.5 kW surge margin is required.
Availability
1.5KE300A-E3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive engine control units, telecom remote terminal units, and renewable energy inverter DC links requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE300A-E3/73 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 automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh-environment applications - targeting industrial automation, transportation systems, and infrastructure equipment where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5KE300A-E3/73 under a 10/1000 µs surge?
The 1.5KE300A-E3/73 clamps to a maximum of 414 V at its rated peak pulse current of 3.6 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and represents the upper limit of voltage seen by downstream circuitry during a full-power transient event. The actual clamping voltage of the 1.5KE300A-E3/73 will be lower at reduced surge currents, following the incremental clamping curve shown in Fig. 7 of the Vishay datasheet.
Is the 1.5KE300A-E3/73 RoHS compliant and qualified for automotive use?
The 1.5KE300A-E3/73 carries the E3 suffix, confirming RoHS compliance and JESD 201 Class 1A whisker resistance. However, it is designated as commercial grade only - unlike HE3-suffixed variants (e.g., 1.5KE300AHE3_B), the 1.5KE300A-E3/73 is not AEC-Q101 qualified. For automotive applications requiring qualification, engineers must select the HE3 version; the 1.5KE300A-E3/73 remains suitable for industrial and telecom environments meeting commercial reliability standards.
How does the 1.5KE300A-E3/73 differ from the bidirectional 1.5KE300CA?
The 1.5KE300A-E3/73 is unidirectional with cathode marking, providing clamping only during reverse-voltage transients on DC lines, while the 1.5KE300CA is bidirectional and symmetrical - clamping in both polarities without polarity marking. Both share identical VWM (300 V), VBR (285–315 V), and VC (414 V) specs, but the 1.5KE300A-E3/73 cannot protect AC or floating signals. Use the 1.5KE300A-E3/73 for fixed-polarity DC rails; choose 1.5KE300CA only when polarity reversal is possible.
What is the maximum operating temperature for the 1.5KE300A-E3/73?
The 1.5KE300A-E3/73 has a maximum junction temperature (TJ) of +175 °C and a storage temperature range of –55 °C to +175 °C. Its thermal resistance values - RθJA = 75 °C/W and RθJL = 15.4 °C/W - indicate that reliable operation at full 1500 W surge capacity requires adequate lead-to-heatsink thermal path. At ambient temperatures up to +125 °C, the 1.5KE300A-E3/73 maintains functionality provided junction temperature stays within its 175 °C limit.
Can the 1.5KE300A-E3/73 be used in parallel to increase surge handling?
While the 1.5KE300A-E3/73 datasheet notes TVS diodes "can also be used in series or parallel to increase the peak power ratings," parallel use requires careful matching of VBR and dynamic impedance to ensure current sharing. Mismatched units may cause one device to absorb disproportionate energy and fail prematurely. For designs requiring >1500 W, Vishay recommends verified multi-die modules or stacked configurations rather than ad-hoc parallel placement of discrete 1.5KE300A-E3/73 units.
1.5KE300A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 3.6A
- 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
1.5KE300A-E3/73 FAQ
1.How can I place an order for 1.5KE300A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300A-E3/73 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 1.5KE300A-E3/73 reliable?
The price and inventory of 1.5KE300A-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE300A-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE300A-E3/73?
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1.5KE300A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE300A-E3/73 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 1.5KE300A-E3/73?
For technical support, including 1.5KE300A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300A-E3/73 requirements.
6.How does Aetrix verify that 1.5KE300A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE300A-E3/73 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 1.5KE300A-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE300A-E3/73?
All 1.5KE300A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300A-E3/73, 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 1.5KE300A-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE300A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300A-E3/73 Tags
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