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Vishay General Semiconductor - Diodes Division 1.5KE440A-E3/73
- Part No.:
- 1.5KE440A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440A-E3/73.pdf
- Description:
- TVS DIODE 376VWM 602VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,479
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Product details
Overview
1.5KE440A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 418 V to 462 V breakdown voltage (VBR), 376 V maximum standoff voltage (VWM), 602 V clamping voltage at 2.5 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in industrial power supplies and automotive ECUs.
For engineers reviewing the 1.5KE440A-E3/73 datasheet, 1.5KE440A-E3/73 pinout, 1.5KE440A-E3/73 application, or 1.5KE440A-E3/73 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant packaging details, and direct alternative options for high-voltage transient suppression in ruggedized electronics.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients. Its 1500 W peak pulse power rating is specified at TA = 25 °C and derates linearly above 25 °C per Fig. 2, with thermal resistance from junction to lead (RθJL) at 15.4 °C/W enabling effective heat dissipation through PCB copper pours or short leads.
The device exhibits a maximum reverse leakage current of 1.0 µA at VWM = 376 V and a temperature coefficient of VBR of +0.110 %/°C - ensuring predictable voltage threshold drift across its full operating temperature range. It is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine) and supports soldering per JESD 22-B106 (275 °C max, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 418 V to 462 V at IT = 1.0 mA - defines precise voltage threshold where avalanche conduction begins, critical for coordination with downstream overvoltage protection. |
| VWM | 376 V - maximum continuous reverse working voltage; must exceed system DC rail or signal swing to prevent leakage-induced power loss or false triggering. |
| VC @ IPPM | 602 V at 2.5 A peak pulse current - clamping voltage during standardized 10/1000 µs surge; determines maximum stress imposed on protected ICs or MOSFETs. |
| PPPM | 1500 W - peak pulse power handling capability; enables robust protection against lightning-induced surges (IEC 61000-4-5 Level 4) on 400 V+ DC buses. |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine); supports protection against high-energy inductive switch-off events. |
| TJ Range | –55 °C to +175 °C - extended junction temperature range ensures reliable operation in under-hood automotive, industrial motor drives, and outdoor power systems. |
| Package | DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded package with UL 94 V-0 flammability rating and matte tin-plated leads compliant with J-STD-002. |
Pinout & Package
1.5KE440A-E3/73 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; polarity must be observed during PCB layout to ensure correct unidirectional clamping orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path when transient exceeds VWM. |
| Cathode (banded end) | High-side surge input terminal | Connected to protected line (e.g., 400 V DC bus); avalanche conduction initiates here to shunt surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, low-leakage avalanche performance over lifetime and temperature, minimizing parameter drift in harsh environments. |
| 1500 W peak pulse power (10/1000 µs) | Supports compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment up to Level 4. |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or gas discharge tubes - preserving integrity of fast-switching MOSFETs and gate drivers. |
| RoHS-compliant, commercial-grade E3 suffix | Meets JESD 201 Class 1A whisker test and JESD 22-B106 solderability standards; suitable for automated assembly and high-reliability production. |
| UL recognition (QVGQ2, E136766) | Validated under UL 497B for telecom and industrial protector applications - simplifies safety certification for end equipment. |
Applications
| Industrial Power Supply Protection | Automotive ECU Input Protection |
|---|---|
Use Scenario: Protecting 400 V DC intermediate bus in programmable logic controller (PLC) power modules from inductive switching spikes and load dump events. IC Role / Device Role / Timing Role: Primary clamping element placed directly across DC input terminals to limit transient overvoltage before it reaches DC-DC converters and microcontrollers. Use Value: Clamps 10/1000 µs surges to ≤602 V while dissipating 1500 W, preventing latch-up or gate oxide rupture in downstream SiC MOSFET drivers. |
Use Scenario: Safeguarding LIN/CAN transceiver supply pins in engine control units exposed to ISO 7637-2 Pulse 5a (load dump) up to 60 V. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of LDO regulators to absorb energy before it propagates into low-voltage domains. Use Value: Withstands 200 A 8.3 ms surge and maintains VWM = 376 V - enabling use on high-side 12 V/24 V rails without false triggering during normal operation. |
| Telecom DC Feeder Protection | Renewable Energy Inverter DC Link |
Use Scenario: Shielding remote radio head (RRH) power inputs from induced lightning surges on long outdoor feeder cables per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: First-line defense on -48 V DC input stage, coordinated with secondary GDT or MOV stages for staged energy absorption. Use Value: Sub-ns response ensures clamping occurs before secondary protectors activate, reducing let-through voltage and protecting sensitive RF front-end ICs. |
Use Scenario: Protecting 600 V DC link capacitors and IGBT gate drivers in solar string inverters subjected to grid fault-induced transients. IC Role / Device Role / Timing Role: Parallel-connected TVS array across DC bus to suppress fast-rising common-mode surges from transformer saturation or grid switching. Use Value: 175 °C max junction temperature and 15.4 °C/W RθJL allow sustained operation in high-ambient rooftop enclosures without thermal runaway. |
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 (SMA) package; 440 V VBR min/max = 418–462 V; same PPPM = 1500 W but lower IPPM = 2.3 A at VC = 602 V. | Surface-mount footprint requires PCB redesign; better suited for space-constrained telecom modules vs. through-hole industrial power boards. | Select SMAJ440A only if SMT assembly is mandatory and thermal pad area is sufficient to match DO-201AD's RθJL performance. |
| ON Semiconductor 1N6299A | Same DO-201AD package; identical VBR, VWM, VC, and PPPM; differs in JEDEC qualification (not AEC-Q101) and tighter VBR tolerance (±5% vs. ±10% for 1.5KE series). | Preferred for cost-sensitive industrial designs where automotive qualification is unnecessary; same mechanical fit and electrical behavior. | 1N6299A offers drop-in replacement capability with improved VBR consistency - ideal for precision clamping in regulated DC systems. |
Compared with 1.5KE440A-E3/73, SMAJ440A trades through-hole reliability for SMT density and requires thermal redesign, while 1N6299A provides identical form-factor performance with tighter breakdown tolerance but no automotive qualification - making it optimal for non-automotive industrial use cases demanding higher parametric consistency.
Availability
1.5KE440A-E3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, telecom DC feeders, and renewable energy inverters requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE440A-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 high-reliability diodes, rectifiers, and protection devices engineered for industrial, automotive, and telecom applications.
The 1.5KE series was developed to deliver high-power, low-clamping TVS protection in ruggedized axial packages for legacy and new-design DC power systems where board space and thermal mass favor through-hole solutions.
FAQ
What is the breakdown voltage range of the 1.5KE440A-E3/73?
The 1.5KE440A-E3/73 has a guaranteed breakdown voltage (VBR) range of 418 V to 462 V at a test current of 1.0 mA. This specification is measured per JEDEC standard and ensures consistent avalanche initiation across production lots. The 1.5KE440A-E3/73 maintains this range across its full operating temperature span, supporting reliable coordination with downstream overvoltage thresholds in 400 V-class systems.
Is the 1.5KE440A-E3/73 suitable for automotive applications?
The 1.5KE440A-E3/73 is a commercial-grade part and is not AEC-Q101 qualified. While it operates from –55 °C to +175 °C and meets UL 497B recognition, it lacks the stress-test validation required for automotive under-hood deployment. For automotive use, consider the AEC-Q101-qualified 1.5KE440AHE3_B variant instead - the 1.5KE440A-E3/73 remains appropriate for industrial and telecom applications where AEC-Q101 is not mandated.
What is the clamping voltage of the 1.5KE440A-E3/73 under surge conditions?
The 1.5KE440A-E3/73 clamps to a maximum of 602 V at its rated peak pulse current of 2.5 A (10/1000 µs waveform). This value represents the upper limit of voltage seen by protected circuitry during a standardized surge event. The 1.5KE440A-E3/73 achieves this clamping performance with low incremental surge resistance, ensuring minimal let-through energy to sensitive loads such as MOSFET gates or ADC references.
Can the 1.5KE440A-E3/73 be used in bidirectional configurations?
No - the 1.5KE440A-E3/73 is a unidirectional TVS diode, indicated by the "A" suffix. Bidirectional variants use the "CA" suffix (e.g., 1.5KE220CA) and are only available up to 220 V VBR. Since 1.5KE440A-E3/73 exceeds that limit and carries no "C" designation, it is strictly unidirectional and must be oriented with cathode toward the protected line to function correctly.
What package type does the 1.5KE440A-E3/73 use?
The 1.5KE440A-E3/73 uses the DO-201AD package (Case Style 1.5KE), an axial-leaded, epoxy-molded outline with UL 94 V-0 flammability rating. Its dimensions are 5.3 mm diameter × 9.5 mm length, with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1A whisker resistance. This package provides robust thermal conduction via leads and is optimized for through-hole mounting in high-power transient protection circuits.
1.5KE440A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 602V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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
1.5KE440A-E3/73 FAQ
1.How can I place an order for 1.5KE440A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440A-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 1.5KE440A-E3/73 reliable?
The price and inventory of 1.5KE440A-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 1.5KE440A-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE440A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE440A-E3/73?
1.5KE440A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440A-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 1.5KE440A-E3/73?
For technical support, including 1.5KE440A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440A-E3/73 requirements.
6.How does Aetrix verify that 1.5KE440A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE440A-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 1.5KE440A-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE440A-E3/73?
All 1.5KE440A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440A-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 1.5KE440A-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE440A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440A-E3/73 Tags
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