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Vishay General Semiconductor - Diodes Division 1.5KE300CA-E3/73
- Part No.:
- 1.5KE300CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300CA-E3/73.pdf
- Description:
- TVS DIODE 256VWM 414VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,451
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Product details
Overview
1.5KE300CA-E3/73 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 300 V standoff voltage (VWM), 344 V clamping voltage at 3.6 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature. It protects MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges in industrial and automotive systems.
For engineers reviewing the 1.5KE300CA-E3/73 datasheet, 1.5KE300CA-E3/73 pinout, 1.5KE300CA-E3/73 application, or 1.5KE300CA-E3/73 equivalent, this part delivers verified bidirectional clamping performance with glass-passivated junction reliability, RoHS-compliant matte tin leads, and JESD 201 Class 1A whisker resistance - critical for long-life embedded power rail protection.
Technical Context
This device uses an avalanche breakdown mechanism to clamp transient overvoltages within nanoseconds (1 ns typical response). Its bidirectional structure enables symmetrical clamping on AC lines or differential signal paths without polarity constraints.
Rated for 1500 W peak pulse power under 10/1000 µs waveform and derated above 25 °C per JEDEC standard, it sustains repetitive surges at 0.01% duty cycle. Thermal resistance is 15.4 °C/W (junction-to-lead), supporting robust thermal coupling to PCB copper or heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 256 V - maximum continuous reverse working voltage before clamping initiates |
| Clamping Voltage (VC) | 414 V at 3.6 A IPPM - limits transient voltage seen by downstream circuitry |
| Peak Pulse Power (PPPM) | 1500 W - handles high-energy surges such as lightning-induced 10/1000 µs transients |
| Breakdown Voltage (VBR) | 285–315 V at 1 mA - defines precise avalanche onset threshold for design margining |
| Junction Temperature Range | –55 °C to +175 °C - supports operation in under-hood automotive and industrial environments |
| Leakage Current (ID) | 1.0 µA max at VWM - ensures minimal standby power loss in always-on circuits |
| Package Type | DO-201AD (Case Style 1.5KE) - industry-standard axial leaded package with 0.375" lead length |
Pinout & Package
1.5KE300CA-E3/73 uses a DO-201AD axial-leaded package (Case Style 1.5KE) with no polarity marking - consistent with bidirectional TVS construction. Leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102, and rated for 275 °C dip soldering (10 s max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | No functional distinction - either lead connects to protected line; clamps equally in both directions |
| Lead 1 / Lead 2 | Current path for surge conduction | Both leads conduct surge current during transient events; requires symmetric PCB trace routing for balanced impedance |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment |
| Response time ≤1 ns | Clamps transients before sensitive ICs experience overstress - faster than MOVs or GDTs |
| RoHS-compliant, JESD 201 Class 1A whisker resistant | Ensures solder joint integrity in high-reliability applications without post-solder mitigation |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial signal line protection per safety-critical standards |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate driver supply rails against inductive kickback from relay and solenoid switching. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across DC bus or low-voltage control inputs. Use Value: Limits transient voltage to ≤414 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic and gate drivers. |
Use Scenario: Shielding LIN bus transceivers and sensor inputs from load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V power rail and bidirectional data lines. Use Value: Withstands 1500 W pulses while maintaining <1 µA leakage at 256 V, preserving battery drain budgets. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Surge suppression on PoE-powered Ethernet ports exposed to outdoor lightning coupling. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated DC output side of midspan injectors. Use Value: Clamps 10/1000 µs transients to 414 V within 1 ns, protecting IEEE 802.3af/at PHY interface ICs. |
Use Scenario: DC-link overvoltage protection in solar string inverters subjected to grid-switching transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus capacitors to absorb energy from stray inductance. Use Value: Sustains 175 °C junction temperature during sustained overload, enabling compact heatsink-free designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300CA | Lower peak pulse power (600 W), smaller SMB package (vs. DO-201AD), higher thermal resistance (RθJA = 110 °C/W) | Best suited for space-constrained PCBs where 600 W surge rating suffices | Select when board area is limited and system-level surge testing validates 600 W capability |
| 1.5KE300A-E3/73 | Unidirectional variant; identical VWM, VC, and PPPM but conducts only in reverse direction | Required where polarity-aware clamping is needed (e.g., DC power input with defined ground reference) | Choose only if circuit topology mandates unidirectional behavior - not drop-in compatible with 1.5KE300CA-E3/73 |
Compared with SMBJ300CA and 1.5KE300A-E3/73, the 1.5KE300CA-E3/73 uniquely combines 1500 W surge handling, bidirectional symmetry, and DO-201AD mechanical robustness - making it optimal for high-reliability industrial and automotive power rail protection where layout flexibility and thermal margin are prioritized over footprint size.
Availability
1.5KE300CA-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and renewable energy inverters requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE300CA-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, and protection devices with emphasis on reliability and application-specific validation.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes demand proven 1500 W surge resilience and extended temperature operation.
FAQ
What is the clamping voltage of the 1.5KE300CA-E3/73 at its rated peak pulse current?
The 1.5KE300CA-E3/73 has a maximum clamping voltage (VC) of 414 V at 3.6 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event and is confirmed in Vishay's datasheet Document Number 88301, page 2.
Is the 1.5KE300CA-E3/73 suitable for automotive applications requiring AEC-Q101 qualification?
No - the 1.5KE300CA-E3/73 is a commercial-grade part. AEC-Q101 qualified versions use the HE3 suffix (e.g., 1.5KE300CAHE3_B). The "E3/73" suffix indicates RoHS compliance and JESD 201 Class 1A whisker resistance but does not imply automotive qualification. For AEC-Q101 designs, specify the HE3 variant.
How does the bidirectional nature of the 1.5KE300CA-E3/73 affect its placement in a circuit?
The 1.5KE300CA-E3/73 has no polarity marking and clamps identically in both directions, making it ideal for AC lines, differential data buses (e.g., RS-485), or any node where voltage polarity may reverse. Unlike unidirectional TVS diodes, it requires no orientation check during placement - simplifying assembly and eliminating risk of reverse installation.
What is the maximum operating temperature for the 1.5KE300CA-E3/73 junction?
The 1.5KE300CA-E3/73 has a maximum junction temperature (TJ) rating of +175 °C, validated per JEDEC test conditions. This allows reliable operation in under-hood automotive locations, industrial enclosures, and solar inverter heat zones where ambient temperatures exceed 100 °C - provided thermal design maintains TJ ≤ 175 °C.
Can the 1.5KE300CA-E3/73 be used in parallel to increase surge current handling?
Yes - the 1.5KE300CA-E3/73 can be paralleled to distribute surge current, but matching VBR (285–315 V) and thermal layout is essential to ensure current sharing. Vishay's application notes confirm this practice for >1500 W system-level protection, though individual device derating and PCB copper balancing must be implemented.
1.5KE300CA-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE300CA-E3/73 FAQ
1.How can I place an order for 1.5KE300CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300CA-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 1.5KE300CA-E3/73 reliable?
The price and inventory of 1.5KE300CA-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 1.5KE300CA-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE300CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE300CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE300CA-E3/73?
1.5KE300CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE300CA-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 1.5KE300CA-E3/73?
For technical support, including 1.5KE300CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300CA-E3/73 requirements.
6.How does Aetrix verify that 1.5KE300CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE300CA-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 1.5KE300CA-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE300CA-E3/73?
All 1.5KE300CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300CA-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 1.5KE300CA-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE300CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300CA-E3/73 Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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