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Vishay General Semiconductor - Diodes Division 1.5KE440-E3/73
- Part No.:
- 1.5KE440-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440-E3/73.pdf
- Description:
- TVS DIODE 356VWM 631VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,361
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Product details
Overview
1.5KE440-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 418 V to 462 V breakdown voltage (VBR), 376 V maximum working voltage (VWM), 602 V clamping voltage (VC) at 2.5 A peak pulse current, 1500 W peak pulse power rating with 10/1000 µs waveform, and operates across -55 °C to +175 °C junction temperature range - deployed in industrial power supplies and automotive ECUs.
For engineers reviewing the 1.5KE440-E3/73 datasheet, 1.5KE440-E3/73 pinout, 1.5KE440-E3/73 application, or 1.5KE440-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package dimensions, polarity marking convention, thermal resistance (RθJA = 75 °C/W), and direct alternative options for overvoltage protection design validation.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential pulse waveform, with derating applied above 25 °C ambient per Fig. 2 of the datasheet.
The device supports 200 A non-repetitive forward surge current (IFSM) and exhibits a maximum forward voltage (VF) of 5.0 V at 100 A - consistent with all 1.5KE250A and higher variants. Thermal performance is characterized by RθJL = 15.4 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 418 V / 462 V - ensures reliable conduction onset above normal operating voltage while avoiding false triggering |
| VWM | 376 V - maximum continuous reverse standoff voltage compatible with 400 V DC bus systems |
| VC @ IPPM | 602 V - clamping voltage limits downstream component stress during 2.5 A transient events |
| PPPM | 1500 W - peak pulse power handling for 1 ms surges per IEC 61000-4-5 Level 4 compliance |
| IPPM | 2.5 A - peak pulse current derived from 10/1000 µs waveform, used to calculate actual system surge energy |
| TJ range | -55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments without derating |
| RθJA | 75 °C/W - defines thermal bottleneck for PCB layout; requires adequate copper pour for sustained power dissipation |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated leads. Cathode indicated by color band on case; RoHS-compliant per JESD 201 Class 1A whisker test (E3 suffix). Dimensions: 5.3 mm × 5.3 mm × 9.5 mm (L × W × H), lead diameter 1.07 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or low-side return path in unidirectional clamp configuration |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected line (e.g., 400 V rail); conducts when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV open-circuit / 2 kV line-to-ground |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience overvoltage damage (e.g., MCU I/O pins) |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising ESD or lightning-induced surges |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance for lead-free reflow soldering processes |
Applications
| Industrial Power Supply Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 400 V DC input stage of switch-mode power supplies against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to shunt surge energy away from rectifier and PFC controller. Use Value: Clamps 400 V rail to ≤602 V during 2.5 A transients, preserving MOSFET gate oxide integrity and preventing controller latch-up. |
Use Scenario: Safeguarding CAN transceiver power pins and microcontroller supply inputs in engine bay electronics exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V/24 V battery feed, coordinated with secondary TVS on signal lines. Use Value: Withstands 175 °C junction temperature and 200 A surge current, meeting AEC-Q101 qualification requirements for under-hood use. |
| Telecom Line Interface Protection | Renewable Energy Inverter DC Link |
Use Scenario: Shielding Ethernet PHY power rails and auxiliary DC-DC converters from induced lightning surges on outdoor telecom cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS on 3.3 V/5 V/12 V internal rails, triggered only during >376 V transients. Use Value: 376 V VWM prevents leakage current interference with low-noise analog circuits while enabling robust 602 V clamping. |
Use Scenario: Protecting IGBT gate drivers and DC link capacitors in solar inverters subjected to grid-switching transients. IC Role / Device Role / Timing Role: High-voltage TVS on 600–1000 V DC link, absorbing energy from stray inductance during rapid IGBT turn-off. Use Value: 1500 W pulse rating handles repetitive 10/1000 µs surges common in photovoltaic plant commissioning and fault clearing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ440A | DO-214AC package (smaller footprint), 440 V VBR, 644 V VC @ 2.3 A, 400 W PPPM | Lower power rating limits use to low-energy signal-line protection; unsuitable for 400 V rail clamping | Select only for space-constrained PCBs where 1500 W capability is not required |
| ON Semiconductor 1.5SMC440A | DO-214AB package, identical 418–462 V VBR, 602 V VC @ 2.5 A, same 1500 W rating, but rated for 175 °C TJ | Same clamping performance and thermal capability; differs only in packaging and branding | Drop-in replacement if DO-214AB footprint aligns with layout; verify lead finish compatibility with assembly process |
Compared with 1.5KE440-E3/73, SMAJ440A offers compact size but sacrifices 73 % peak power handling, limiting its use to signal-level protection; 1.5SMC440A matches electrical specs and thermal rating exactly but uses a different JEDEC outline, requiring mechanical verification before substitution.
Availability
1.5KE440-E3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, telecom infrastructure, and renewable energy inverters requiring stable component supply across extended temperature ranges and high-surge environments.
Supply support for 1.5KE440-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, thermal performance, and AEC-Q101 qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure modes must be mitigated without compromising long-term stability.
FAQ
What is the breakdown voltage tolerance for 1.5KE440-E3/73?
The 1.5KE440-E3/73 has a specified breakdown voltage (VBR) range of 418 V minimum to 462 V maximum at 1.0 mA test current, representing a ±5 % tolerance around the nominal 440 V rating. This tolerance is guaranteed per the Vishay datasheet revision 09-Aug-2022 and applies under standard test conditions (TA = 25 °C).
Is 1.5KE440-E3/73 suitable for bidirectional surge protection?
No, 1.5KE440-E3/73 is a unidirectional TVS diode. Bidirectional versions in the 1.5KE family are designated with a "CA" suffix (e.g., 1.5KE220CA) and are only available up to 220 V VBR. The 440 V rating falls outside the bidirectional range, and the device lacks symmetrical clamping characteristics required for AC or dual-polarity applications.
What is the maximum clamping voltage of 1.5KE440-E3/73 at rated peak pulse current?
The maximum clamping voltage (VC) of 1.5KE440-E3/73 is 602 V at its rated peak pulse current (IPPM) of 2.5 A, measured using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does 1.5KE440-E3/73 meet AEC-Q101 qualification?
No, 1.5KE440-E3/73 is a commercial-grade device. Per the Vishay datasheet, AEC-Q101 qualification applies only to variants with the "HE3" suffix (e.g., 1.5KE440AHE3_B) and is limited to the 1.5KE6.8A–1.5KE220A range. The 1.5KE440A variant is explicitly noted as commercial grade only.
How does the thermal resistance of 1.5KE440-E3/73 affect PCB layout?
With a junction-to-ambient thermal resistance (RθJA) of 75 °C/W, 1.5KE440-E3/73 requires substantial copper area for heat dissipation during repetitive surge events. Layout best practice includes ≥250 mm² of 2 oz copper connected directly to both leads, minimizing trace length and avoiding thermal isolation - especially critical when operating near its 6.5 W steady-state power limit.
1.5KE440-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 356V
- Voltage - Breakdown (Min):
- 396V
- Voltage - Clamping (Max) @ Ipp:
- 631V
- Current - Peak Pulse (10/1000µs):
- 2.4A
- 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
1.5KE440-E3/73 FAQ
1.How can I place an order for 1.5KE440-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440-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 1.5KE440-E3/73 reliable?
The price and inventory of 1.5KE440-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 1.5KE440-E3/73 is usually 5 days.
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1.5KE440-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440-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 1.5KE440-E3/73?
For technical support, including 1.5KE440-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440-E3/73 requirements.
6.How does Aetrix verify that 1.5KE440-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE440-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 1.5KE440-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE440-E3/73?
All 1.5KE440-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440-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 1.5KE440-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE440-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440-E3/73 Tags
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