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Vishay General Semiconductor - Diodes Division 1.5KE300A-E3/54
- Part No.:
- 1.5KE300A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300A-E3/54.pdf
- Description:
- TVS DIODE 256VWM 414VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,955
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Product details
Overview
1.5KE300A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal paths. 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, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in industrial motor drives, telecom power supplies, and automotive body control modules.
For engineers reviewing the 1.5KE300A-E3/54 datasheet, 1.5KE300A-E3/54 pinout, 1.5KE300A-E3/54 application, or 1.5KE300A-E3/54 equivalent, key selection criteria include clamping voltage margin relative to protected IC rail, thermal derating above 25 °C ambient, unidirectional polarity marking (cathode band), and compatibility with JEDEC 1.5KE case mounting and lead-forming requirements.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal operation it presents high impedance (>1 µA leakage at 256 V), but triggers into low-impedance conduction when transient voltage exceeds its 300–315 V breakdown range. Its glass-passivated junction enables fast response (<1 ns) and stable avalanche characteristics across temperature.
The device uses a single PN-junction structure housed in a molded epoxy DO-201AD package, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Thermal resistance is 75 °C/W junction-to-ambient and 15.4 °C/W junction-to-lead, supporting reliable operation up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 256 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; defines upper limit of safe DC operating range. |
| VBR (Breakdown Voltage) | 285–315 V at 1 mA - Confirmed avalanche onset range; ensures predictable triggering without premature conduction. |
| VC (Clamping Voltage) | 414 V at 3.6 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; determines minimum required voltage margin for downstream ICs. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained for one 10/1000 µs transient; defines maximum energy absorption per event without degradation. |
| TJ max | 175 °C - Absolute maximum junction temperature; requires thermal design to limit RθJA derating above 25 °C ambient. |
| IFSM | 200 A - Non-repetitive forward surge rating (8.3 ms half-sine); relevant only if used in forward-biased configurations. |
| VF (Forward Voltage) | 5.0 V at 100 A - Forward conduction drop; impacts power dissipation during fault conditions in forward-mode applications. |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating. Cathode identified by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to lower-potential side (e.g., ground or return rail) in unidirectional clamp configuration. |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., +24 V rail); color band marks this terminal for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche performance over 1000+ surge events and extended temperature cycling. |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV line-earth) surge immunity in properly filtered front-end designs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., EFT bursts), improving clamping fidelity. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets JESD 201 Class 1A whisker resistance and Pb-free soldering requirements (275 °C, 10 s). |
| −55 °C to +175 °C operating range | Enables deployment in under-hood automotive ECUs and industrial inverters without derating penalties below −40 °C. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sense circuits against switching-induced transients in 400 V DC link systems. IC Role / Device Role: Unidirectional shunt clamp placed between DC bus and ground, triggered by dV/dt spikes from IGBT commutation. Use Value: Limits transient voltage to ≤414 V, preserving 600 V-rated gate drivers and isolated amplifiers within safe SOA. | Use Scenario: Input-stage surge suppression on −48 V telecom rectifier outputs exposed to lightning-induced surges on copper distribution lines. IC Role / Device Role: Primary overvoltage clamp on DC output rail upstream of DC/DC converters and monitoring ICs. Use Value: Absorbs 1500 W surges while maintaining <1 µA leakage at nominal −48 V, preventing false trips and standby power loss. |
| Automotive Body Control Modules | Industrial PLC I/O Terminals |
Use Scenario: Load-dump and jump-start transient protection on 12 V battery-fed microcontroller power rails in BCMs. IC Role / Device Role: Unidirectional TVS connected cathode-to-rail, anode-to-ground to clamp positive transients up to ISO 7637-2 Pulse 5a. Use Value: Clamps 300 V transients to 414 V within <1 ns, safeguarding 5 V LDOs and CAN transceivers without crowbar action. | Use Scenario: Field-side protection of 24 V digital input channels against induced surges from solenoid coil de-energization in factory automation. IC Role / Device Role: Rail-to-ground clamp on each optocoupler input channel, sized for repetitive 10/1000 µs events at 0.01% duty cycle. Use Value: Maintains <1 µA leakage at 24 V, ensuring clean logic thresholds while surviving >1000 surges at rated power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300A | Lower PPPM (600 W), smaller SMB package (JEDEC DO-214AA), 400 V VC at 1.5 A | Better suited for space-constrained PCBs with lower surge exposure (IEC 61000-4-5 Level 2) | Select SMBJ300A when board area is critical and peak surge energy is ≤600 W. |
| 1.5KE300CA | Bidirectional variant; same VBR/VWM/VC ratings but symmetrical conduction in both polarities | Required for AC-coupled or floating signal lines where negative transients must also be clamped | Choose 1.5KE300CA only when protecting bidirectional data lines (e.g., RS-485) or transformer-coupled interfaces. |
Compared with SMBJ300A and 1.5KE300CA, the 1.5KE300A-E3/54 delivers higher surge robustness in a through-hole package ideal for high-reliability power rail protection, while avoiding the layout constraints of surface-mount alternatives and the unnecessary cost of bidirectional capability in DC-only applications.
Availability
1.5KE300A-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for 1.5KE300A-E3/54 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 supplier of discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and ruggedized packaging.
The 1.5KE series was developed for high-energy transient suppression in harsh environments, targeting industrial, automotive, and telecom infrastructure where sustained 1500 W surge handling and wide temperature operation are mandatory.
FAQ
What is the clamping voltage of the 1.5KE300A-E3/54 and how does it affect circuit protection?
The 1.5KE300A-E3/54 has a maximum clamping voltage (VC) of 414 V at 3.6 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value defines the highest voltage imposed on the protected circuit during a surge event. To ensure safety, downstream components must have a voltage rating exceeding 414 V with appropriate margin - for example, selecting a 600 V-rated MOSFET or 450 V-rated capacitor. The 1.5KE300A-E3/54 achieves this clamping with sub-nanosecond response, minimizing transient overshoot before conduction begins.
Is the 1.5KE300A-E3/54 RoHS compliant and qualified for automotive use?
The 1.5KE300A-E3/54 carries the E3 suffix, confirming RoHS compliance and qualification to JESD 201 Class 1A whisker resistance. However, it is designated as commercial grade only - not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, the HE3 variant (e.g., 1.5KE300AHE3_B) must be specified. The 1.5KE300A-E3/54 remains suitable for non-safety-critical automotive subsystems where qualification is not mandated, such as aftermarket infotainment power rails.
How does thermal derating impact the 1.5KE300A-E3/54's surge capability above 25 °C ambient?
The 1.5KE300A-E3/54's peak pulse power rating of 1500 W applies only at TA = 25 °C. Above that temperature, power must be linearly derated per Figure 2 in Vishay document 88301: at 75 °C ambient, maximum PPPM drops to ~1125 W; at 125 °C, it falls to ~750 W. This derating stems from the device's 75 °C/W junction-to-ambient thermal resistance. Effective heatsinking or reduced surge repetition rate is required in high-temperature enclosures to maintain reliability of the 1.5KE300A-E3/54.
Can the 1.5KE300A-E3/54 be used in bidirectional protection applications?
No - the 1.5KE300A-E3/54 is a unidirectional TVS diode, intended for DC rail protection where transients occur only in one polarity (e.g., positive-going spikes on a +24 V line). For bidirectional protection (e.g., AC signal lines or floating buses), the 1.5KE300CA variant must be used. Using the 1.5KE300A-E3/54 in reverse-biased AC applications risks catastrophic failure due to lack of reverse avalanche capability.
What is the meaning of the "/54" suffix in 1.5KE300A-E3/54?
The "/54" suffix in 1.5KE300A-E3/54 indicates the preferred package code per Vishay's ordering nomenclature: it denotes tape-and-reel packaging in 13-inch diameter reels containing 1400 units, with a unit weight of 0.968 g. This format supports automated SMT placement when used with compatible feeders, though the DO-201AD package is axial-leaded and typically used in through-hole assembly - confirming that /54 refers to reel packaging logistics, not a functional variant of the 1.5KE300A-E3/54.
1.5KE300A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE300A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300A-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE300A-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE300A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE300A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE300A-E3/54?
1.5KE300A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE300A-E3/54 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-E3/54?
For technical support, including 1.5KE300A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE300A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE300A-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE300A-E3/54?
All 1.5KE300A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300A-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE300A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300A-E3/54 Tags
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Diodes Incorporated
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Diodes Incorporated
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