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Vishay General Semiconductor - Diodes Division 1.5KE350A-E3/51
- Part No.:
- 1.5KE350A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350A-E3/51.pdf
- Description:
- TVS DIODE 300VWM 482VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,359
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Product details
Overview
1.5KE350A-E3/51 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It features a 333 V to 368 V breakdown voltage (VBR), 300 V maximum standoff voltage (VWM), 482 V clamping voltage at 3.1 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 and ICs against lightning-induced transients in industrial power supplies.
For engineers reviewing the 1.5KE350A-E3/51 datasheet, 1.5KE350A-E3/51 pinout, 1.5KE350A-E3/51 application, or 1.5KE350A-E3/51 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under standardized surge waveforms, and direct-fit alternatives for ESD and surge-hardened designs.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse power rating applies to 10/1000 µs waveform with 0.01 % duty cycle, and it exhibits a temperature coefficient of VBR of 0.110 %/°C - critical for stable clamping over wide ambient ranges.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), has 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C, and thermal resistance of 15.4 °C/W (junction-to-lead), enabling reliable mounting on PCB copper pours without active cooling in most industrial applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 333 V / 368 V - ensures reliable conduction onset above normal operating voltage while avoiding false triggering |
| VWM | 300 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 482 V - clamped voltage during 3.1 A 10/1000 µs surge, defining worst-case stress on downstream components |
| PPPM | 1500 W - peak transient energy absorption capability per standardized surge waveform |
| TJ max. | +175 °C - enables operation in high-temperature environments such as motor drives and power converters |
| RθJL | 15.4 °C/W - low thermal resistance supports efficient heat transfer to PCB leads, reducing thermal runaway risk |
| IFSM | 200 A - surge current handling for 8.3 ms half-sine, validating robustness against repetitive line-switching events |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant (E3 suffix), and qualified to JESD 201 Class 1A whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Marked with color band; connected to protected line (e.g., 300 V DC rail) to clamp surges toward ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Validated for IEC 61000-4-5 Level 4 surge immunity in AC/DC front-end protection |
| Clamping time <1 ns | Prevents voltage overshoot beyond safe limits for sensitive gate drivers and analog front-ends |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, improving protection margin for 300 V systems |
| Operating TJ up to +175 °C | Supports placement near heat-generating components (e.g., MOSFETs, transformers) without derating |
Applications
| Industrial Power Supply Protection | Automotive DC Link Surge Suppression |
|---|---|
Use Scenario: Protecting 300 V DC bus in industrial SMPS against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between DC+ and chassis ground to shunt surge energy away from PWM controllers and gate drivers. Use Value: Limits transient voltage to ≤482 V, preserving gate oxide integrity of 650 V Si MOSFETs and preventing controller latch-up. | Use Scenario: Safeguarding battery management system (BMS) input stages in 48 V mild-hybrid vehicles exposed to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Standoff protector on high-side supply rail, conducting only during >333 V surges with sub-nanosecond response. Use Value: Maintains VWM = 300 V compatibility with 48 V nominal systems while surviving 1500 W pulses without degradation. |
| Telecom Rectifier Output Clamping | Motor Drive DC Bus Transient Suppression |
Use Scenario: Securing output of telecom rectifiers feeding 300 V backplane distribution against lightning-induced surges on outdoor lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on rectified DC output, coordinated with upstream MOVs for staged protection. Use Value: Provides precise, repeatable clamping at 482 V - tighter tolerance than MOV-based solutions - ensuring consistent downstream component stress. | Use Scenario: Protecting IGBT gate driver ICs and current sense amplifiers in HVAC inverter drives subjected to commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on isolated DC link sensing nodes, referenced to local ground to prevent common-mode transients from coupling into analog paths. Use Value: Leverages 175 °C TJ max. to remain functional in high-ambient motor control enclosures where ambient reaches 105 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ350A | Same 350 V VBR range, but 400 W PPPM; SMA package (lower IPPM, higher thermal resistance) | Not suitable for 1500 W surge events; limited to secondary-level protection or low-energy signal lines | Select only if board space constraints prohibit axial 1.5KE package and surge energy is ≤400 W |
| ON Semiconductor 1N6299A | Identical 1.5KE family, same 1500 W rating and 333–368 V VBR, but commercial-grade (non-AEC-Q101) and different packaging code | No automotive qualification; identical electrical performance for industrial use cases | Drop-in substitute where AEC-Q101 is not required; verify tape/reel format compatibility with SMT line |
Compared with 1.5KE350A-E3/51, SMAJ350A offers smaller footprint but sacrifices 73 % peak power handling and thermal robustness, while 1N6299A matches all key electrical specs and mechanical form factor but lacks AEC-Q101 validation - making it viable for cost-sensitive industrial designs where automotive qualification is unnecessary.
Availability
1.5KE350A-E3/51 is available at Aetrix Electronics and suitable for industrial power supplies, automotive DC link circuits, telecom rectifier outputs, and motor drive DC bus protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE350A-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 specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance across extended temperature ranges and high-reliability industrial and transportation applications.
FAQ
What is the breakdown voltage tolerance for 1.5KE350A-E3/51?
The 1.5KE350A-E3/51 has a guaranteed breakdown voltage range of 333 V to 368 V at 1 mA test current (VBR min/max), corresponding to ±5.5 % tolerance around the nominal 350 V rating. This tight spread ensures predictable clamping onset in 300 V DC systems and avoids premature conduction during normal operation. The 1.5KE350A-E3/51 maintains this specification across its full operating temperature range.
Is 1.5KE350A-E3/51 RoHS compliant and lead-free?
Yes, the 1.5KE350A-E3/51 carries the E3 suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a, with matte tin-plated leads meeting J-STD-002 solderability requirements. It also passes JESD 201 Class 1A whisker testing, confirming suitability for high-reliability solder joints. The 1.5KE350A-E3/51 contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE.
Can 1.5KE350A-E3/51 be used in bidirectional configurations?
No, the 1.5KE350A-E3/51 is strictly unidirectional - indicated by the "A" suffix. Bidirectional variants require the "CA" suffix (e.g., 1.5KE220CA), and the datasheet explicitly states that bidirectional types are available only up to 1.5KE220CA. Using 1.5KE350A-E3/51 in reverse-biased mode will not provide symmetrical clamping and may result in catastrophic failure under negative surges.
What is the maximum clamping voltage of 1.5KE350A-E3/51 under surge conditions?
The maximum clamping voltage (VC) of the 1.5KE350A-E3/51 is 482 V at its rated peak pulse current of 3.1 A (10/1000 µs waveform). This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5KE350A-E3/51 achieves this clamping with minimal overshoot due to its sub-nanosecond response time.
Does 1.5KE350A-E3/51 meet AEC-Q101 qualification?
No, the 1.5KE350A-E3/51 is commercial grade only. Per the Vishay datasheet note, AEC-Q101 qualification applies exclusively to 1.5KE6.8AHE3_B through 1.5KE220AHE3_B and their bidirectional counterparts - not to 1.5KE250A and above, including 1.5KE350A-E3/51. For automotive applications requiring AEC-Q101, consider the HE3-suffixed 1.5KE220AHE3_B or alternative qualified TVS families.
1.5KE350A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- 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
1.5KE350A-E3/51 FAQ
1.How can I place an order for 1.5KE350A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350A-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 1.5KE350A-E3/51 reliable?
The price and inventory of 1.5KE350A-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 1.5KE350A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE350A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
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1.5KE350A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350A-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 1.5KE350A-E3/51?
For technical support, including 1.5KE350A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE350A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE350A-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 1.5KE350A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE350A-E3/51?
All 1.5KE350A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350A-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 1.5KE350A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE350A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350A-E3/51 Tags
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