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Vishay General Semiconductor - Diodes Division 1.5KE480A-E3/54
- Part No.:
- 1.5KE480A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE480A-E3/54.pdf
- Description:
- TVS DIODE 408VWM 658VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,056
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Product details
Overview
1.5KE480A-E3/54 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 456 V to 504 V breakdown voltage (VBR), 408 V maximum standoff voltage (VWM), 1500 W peak pulse power (10/1000 µs), 2.28 A peak pulse current (IPPM), and clamps transients to ≤658 V at rated current - deployed in industrial power supplies and telecom line interfaces.
For engineers reviewing the 1.5KE480A-E3/54 datasheet, 1.5KE480A-E3/54 pinout, 1.5KE480A-E3/54 application, or 1.5KE480A-E3/54 equivalent, this part delivers verified unidirectional clamping performance with glass-passivated junction reliability, RoHS-compliant matte tin leads, and UL 94 V-0 molded epoxy packaging suitable for high-voltage DC bus protection and legacy telecom infrastructure.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 408 V), then transitions to low-impedance conduction within <1 ns when transient voltage exceeds VBR. Its 1500 W pulse rating is defined per 10/1000 µs waveform with 0.01% duty cycle, and thermal resistance is 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead).
The device uses a planar passivated silicon junction housed in a Case Style 1.5KE DO-201AD package with axial leads. Polarity is marked by a cathode band; it supports continuous power dissipation of 6.5 W at TL = 75 °C and withstands 200 A non-repetitive forward surge (8.3 ms half-sine), making it suitable for primary-side overvoltage suppression in offline AC-DC converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 456 V to 504 V - ensures reliable triggering above system nominal DC bus (e.g., 400 V telecom rectified lines) while avoiding false trips |
| VWM | 408 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA, matching 400 V-class systems |
| VC @ IPPM | ≤658 V - clamping voltage during 2.28 A 10/1000 µs surge, limiting stress on downstream MOSFETs or controllers |
| PPPM | 1500 W - peak transient energy handling capability per standard 10/1000 µs waveform, sufficient for IEC 61000-4-5 Level 4 surges |
| IPPM | 2.28 A - derived peak pulse current at VC, used to size series impedance and verify coordination with upstream fuses |
| TJ max. | +175 °C - enables operation in high-temperature environments such as enclosed power cabinets or outdoor telecom enclosures |
| RθJA | 75 °C/W - thermal resistance defining derating curve; requires heatsinking or airflow for sustained high-power transient events |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or low-potential node; forms shunt path during overvoltage |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., +400 V rail); color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against lightning-induced surges per IEC 61000-4-5 and ANSI C62.41 |
| Clamping ratio (VC/VBR) ≈ 1.31 | Indicates low incremental surge resistance, minimizing voltage overshoot during fast transients |
| Response time < 1 ns | Ensures protection of sensitive gate drivers and control ICs before destructive voltage levels are reached |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, enabling use in commercial-grade industrial equipment |
Applications
| AC-DC Power Supply Input Stage | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting primary-side rectifier outputs and bulk capacitor inputs against lightning-induced surges on 380–480 V DC distribution lines. IC Role / Device Role / Timing Role: Shunt clamping element placed across DC bus, triggered only during overvoltage events exceeding 456 V. Use Value: Limits transient voltage to ≤658 V, preventing breakdown of 600 V-rated MOSFETs and electrolytic capacitors. | Use Scenario: Safeguarding legacy analog telephone line cards and DSLAM front-ends exposed to induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Unidirectional TVS connected between tip/ring and ground, absorbing longitudinal mode surges up to 1500 W. Use Value: Maintains signal integrity below 408 V standby while clamping 10/1000 µs transients to safe levels for SLIC and codec ICs. |
| Industrial Motor Drive DC Link | Renewable Energy Inverter DC Bus |
Use Scenario: Suppressing switching-induced voltage spikes on 400 V DC links in variable frequency drives during IGBT turn-off. IC Role / Device Role / Timing Role: Fast-response shunt protector placed across DC link capacitors to clamp commutation spikes. Use Value: Reduces voltage overshoot by >30% compared to Zener-only solutions, extending IGBT lifetime and reducing snubber losses. | Use Scenario: Protecting photovoltaic string inverters' DC input stage from grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on MPPT input, coordinated with fuse and MOV for staged protection. Use Value: Withstands repeated 2.28 A surges without degradation, supporting 25-year field deployment in solar farms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ480A | DO-214AA package, lower PPPM (600 W), VBR = 533–589 V, VC = 773 V @ 1.2 A | Surface-mount alternative for space-constrained PCBs; not suitable for same 1500 W surge level | Select SMBJ480A only if board layout mandates SMD and surge requirements are ≤600 W |
| 1.5KE470A-E3/54 | Lower VBR range (447–494 V), VWM = 400 V, VC = 645 V @ 2.34 A, identical package and construction | Compatible drop-in replacement where 400 V standoff is acceptable and tighter VBR tolerance is needed | Choose 1.5KE470A-E3/54 for designs requiring marginally lower clamping voltage and same mechanical fit |
Compared with SMBJ480A, 1.5KE480A-E3/54 provides 2.5× higher surge power handling and lower clamping ratio in through-hole format; versus 1.5KE470A-E3/54, it offers higher VWM and VBR for systems operating near 400 V nominal with tighter overvoltage margins.
Availability
1.5KE480A-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interface modules, and renewable energy inverters requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE480A-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 leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in mains-connected and telecom infrastructure applications, targeting systems requiring robust, standardized, through-hole TVS solutions with proven field performance.
FAQ
What is the breakdown voltage tolerance for 1.5KE480A-E3/54?
The 1.5KE480A-E3/54 has a specified breakdown voltage (VBR) range of 456 V to 504 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 480 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges from –55 °C to +175 °C, critical for consistent protection in high-voltage DC systems where 1.5KE480A-E3/54 is deployed.
Is 1.5KE480A-E3/54 suitable for bidirectional surge protection?
No, 1.5KE480A-E3/54 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants (e.g., 1.5KE480CA) exist only up to 220 V VBR; 1.5KE480A-E3/54 is explicitly rated for unidirectional operation only, with forward voltage of 5.0 V at 100 A. For AC-coupled or symmetrical surge environments, a separate bidirectional device must be selected - 1.5KE480A-E3/54 cannot be used in reverse-biased configurations.
What is the maximum clamping voltage of 1.5KE480A-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE480A-E3/54 is 658 V, measured at its rated peak pulse current (IPPM) of 2.28 A using the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is used to verify coordination with downstream components' voltage ratings - for example, ensuring MOSFETs rated for 650 V or higher remain within safe operating area when 1.5KE480A-E3/54 is applied.
Does 1.5KE480A-E3/54 meet automotive qualification standards?
No, 1.5KE480A-E3/54 is a commercial-grade device (E3 suffix) and is not AEC-Q101 qualified. Vishay offers AEC-Q101 versions under the HE3 suffix (e.g., 1.5KE480AHE3_B), but those are distinct orderable parts with different revision codes and qualification documentation. The 1.5KE480A-E3/54 datasheet explicitly states that AEC-Q101 qualification applies only to devices from 1.5KE6.8AHE3_B through 1.5KE220AHE3_B - 1.5KE480A-E3/54 falls outside that scope and must not be used in automotive safety-critical applications without additional validation.
How does the thermal resistance of 1.5KE480A-E3/54 affect its power derating?
With a junction-to-ambient thermal resistance (RθJA) of 75 °C/W, the 1.5KE480A-E3/54 requires careful thermal management: its 6.5 W continuous power dissipation rating applies only at TL = 75 °C, and derates linearly above that temperature per Figure 5 in the datasheet. At 100 °C lead temperature, usable power drops to ~4.5 W; for high-temperature enclosures or sustained surge duty, heatsinking or forced airflow is necessary to maintain reliability - a key design consideration when deploying 1.5KE480A-E3/54 in sealed industrial power supplies.
1.5KE480A-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):
- 408V
- Voltage - Breakdown (Min):
- 456V
- Voltage - Clamping (Max) @ Ipp:
- 658V
- Current - Peak Pulse (10/1000µs):
- 2.28A
- 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
1.5KE480A-E3/54 FAQ
1.How can I place an order for 1.5KE480A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE480A-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 1.5KE480A-E3/54 reliable?
The price and inventory of 1.5KE480A-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 1.5KE480A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE480A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE480A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE480A-E3/54?
1.5KE480A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE480A-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 1.5KE480A-E3/54?
For technical support, including 1.5KE480A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE480A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE480A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE480A-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 1.5KE480A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE480A-E3/54?
All 1.5KE480A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE480A-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 1.5KE480A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE480A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE480A-E3/54 Tags
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