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Vishay General Semiconductor - Diodes Division 1.5KE300CA-E3/51
- Part No.:
- 1.5KE300CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300CA-E3/51.pdf
- Description:
- TVS DIODE 256VWM 414VC 1.5KE
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5KE300CA-E3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 300 V standoff voltage (VWM), 315 V minimum breakdown voltage (VBR), 414 V maximum clamping voltage (VC) at 3.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive power supplies, industrial motor controls, and telecom line interfaces.
For engineers reviewing the 1.5KE300CA-E3/51 datasheet, 1.5KE300CA-E3/51 pinout, 1.5KE300CA-E3/51 application, or 1.5KE300CA-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bi-directional clamping behavior, AEC-Q101 qualification status, and direct alternative part comparisons for ESD and lightning transient design validation.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical VBR (285–315 V), VWM (256 V), and VC (414 V) specifications in forward and reverse directions. Its glass-passivated junction enables sub-nanosecond response time (<1 ns) and low incremental surge resistance, critical for protecting MOSFET gates and microcontroller I/O against inductive switching spikes.
The device is rated for 175 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2; thermal resistance is 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead). It meets UL 94 V-0 flammability and JESD 201 Class 1A whisker testing (E3 suffix), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 256 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 285 V / 315 V - Breakdown occurs within this range at 1 mA test current; ensures predictable clamping onset across production lots. |
| VC @ IPPM | 414 V - Clamped voltage at 3.6 A peak pulse current (10/1000 µs); determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; supports single-event lightning surges per IEC 61000-4-5 Level 4 (4 kV/2 Ω). |
| ID @ VWM | 1.0 µA - Reverse leakage at rated standoff voltage; negligible power loss and no measurable loading on 24/48 V DC bus lines. |
| TJ max. | +175 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures without thermal shutdown. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard. |
Pinout & Package
Package: JEDEC Case Style 1.5KE - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter. Leads are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional terminals | No polarity marking; symmetrical conduction in both directions - connects across protected line and ground without orientation concern. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV open-circuit voltage in 2 Ω/12 Ω source impedance configurations. |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity in high-speed interfaces. |
| AEC-Q101 qualified (E3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero defect field performance over 15-year lifetime. |
| RoHS-compliant, JESD 201 Class 1A whisker tested | Ensures solder joint integrity in reflow and long-term thermal cycling; eliminates risk of conductive filament growth in high-reliability systems. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protection of 24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple-induced transients. IC Role / Device Role / Timing Role: Bi-directional shunt clamp placed between power rail and chassis ground to divert >100 A surge currents away from PMICs and CAN transceivers. Use Value: Limits rail voltage to ≤414 V during 1500 W surges, preventing latch-up or gate oxide rupture in 40 V-rated MOSFETs and LDOs. |
Use Scenario: Input stage protection for variable-frequency drives exposed to inductive kickback from 3-phase AC motors. IC Role / Device Role / Timing Role: Parallel-connected TVS on DC bus inputs to absorb regenerative energy spikes during rapid deceleration. Use Value: Clamps 10/1000 µs transients to 414 V before they propagate to IGBT gate drivers, avoiding false triggering or desaturation faults. |
| Telecom Line Interface | Renewable Energy Inverter DC Link |
Use Scenario: Secondary surge protection on POTS or DSL line cards subjected to induced lightning surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Bi-directional TVS bridging tip/ring lines to ground, coordinated with primary GDT or MOV stages. Use Value: Provides precise 256 V standoff and fast clamping to protect SLICs and codec ICs without compromising low-voltage signaling margins. |
Use Scenario: DC link overvoltage suppression in solar string inverters where PV array transients couple into 600–1000 V DC buses. IC Role / Device Role / Timing Role: High-VWM TVS placed across DC bus capacitors to clamp switching overshoot and lightning-induced spikes. Use Value: Withstands 256 V continuous DC bus while clamping 3.6 A surges to 414 V - compatible with 650 V IGBT modules and film capacitor ratings. |
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 PPPM (600 W), smaller SMB package (surface-mount), 256 V VWM, 414 V VC - same clamping but reduced surge capacity. | Preferred for space-constrained PCBs where 600 W surge rating suffices (e.g., secondary protection, low-power sensors). | Select SMBJ300CA when board area is limited and peak surge energy is ≤600 W; not suitable for primary automotive load dump protection. |
| 1.5KE300A-E3/51 | Uni-directional variant - identical VWM/VBR/VC/PPPM specs but requires cathode orientation; includes 200 A IFSM rating. | Used where DC polarity is fixed and forward conduction must be blocked (e.g., unidirectional power rails with reverse-polarity protection). | Choose 1.5KE300A-E3/51 only if system architecture mandates uni-directional blocking; otherwise 1.5KE300CA-E3/51 offers orientation-free installation. |
Compared with SMBJ300CA, the 1.5KE300CA-E3/51 delivers 2.5× higher surge power handling in a through-hole package ideal for high-current grounding paths; versus 1.5KE300A-E3/51, it eliminates polarity-dependent layout constraints while maintaining identical clamping performance and AEC-Q101 qualification.
Availability
1.5KE300CA-E3/51 is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive control, and telecom line interface applications requiring stable component supply, long-lifecycle continuity, and AEC-Q101 compliance.
Supply support for 1.5KE300CA-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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
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 surge resilience and long-term parametric stability.
FAQ
What is the clamping voltage of the 1.5KE300CA-E3/51 under a 10/1000 µs surge?
The 1.5KE300CA-E3/51 clamps to a maximum of 414 V when subjected to its rated peak pulse current of 3.6 A with a 10/1000 µs waveform. This value is measured per Figure 9 in the Vishay datasheet 88301 and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events.
Is the 1.5KE300CA-E3/51 suitable for automotive applications?
Yes, the 1.5KE300CA-E3/51 is AEC-Q101 qualified (per note 2 on page 3 of datasheet 88301) and rated for operation from –55 °C to +175 °C. Its glass-passivated junction, 1500 W surge rating, and JESD 201 Class 1A whisker resistance make it appropriate for under-hood ECUs, body control modules, and power distribution units meeting ISO 7637-2 requirements.
How does the 1.5KE300CA-E3/51 differ from the uni-directional 1.5KE300A-E3/51?
The 1.5KE300CA-E3/51 is bi-directional with no polarity marking and identical electrical specs in both directions, whereas the 1.5KE300A-E3/51 is uni-directional with a cathode band and supports 200 A non-repetitive forward surge current (IFSM). Both share 256 V VWM, 285–315 V VBR, and 414 V VC, but only the 'A' version conducts forward current.
What is the standoff voltage rating for the 1.5KE300CA-E3/51?
The standoff voltage (VWM) for the 1.5KE300CA-E3/51 is 256 V - the maximum DC or RMS voltage that can be continuously applied without triggering clamping action. This value provides a 12 % margin below the minimum breakdown voltage of 285 V, ensuring stable operation during normal 24 V or 48 V system transients.
Does the 1.5KE300CA-E3/51 have RoHS and lead-free compliance?
Yes, the 'E3' suffix indicates full RoHS compliance per Directive 2011/65/EU and lead-free construction. The device uses matte tin-plated leads, meets JESD 201 Class 1A whisker testing, and carries UL 94 V-0 flammability certification - confirmed in the Mechanical Data section of Vishay document 88301.
1.5KE300CA-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):
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE300CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300CA-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 1.5KE300CA-E3/51 reliable?
The price and inventory of 1.5KE300CA-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 1.5KE300CA-E3/51 is usually 5 days.
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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-E3/51?
For technical support, including 1.5KE300CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE300CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE300CA-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 1.5KE300CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE300CA-E3/51?
All 1.5KE300CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300CA-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 1.5KE300CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE300CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300CA-E3/51 Tags
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