My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE440A-E3/51
- Part No.:
- 1.5KE440A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440A-E3/51.pdf
- Description:
- TVS DIODE 376VWM 602VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,294
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE440A-E3/51 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 working voltage (VWM), 602 V clamping voltage (VC) 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 - used in industrial power supplies and telecom line interfaces.
For engineers reviewing the 1.5KE440A-E3/51 datasheet, 1.5KE440A-E3/51 pinout, 1.5KE440A-E3/51 application, or 1.5KE440A-E3/51 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant packaging details, and direct alternative part comparisons for robust ESD and lightning transient protection design.
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 handling is defined per 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 across wide ambient ranges.
The device supports 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), has 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C, and thermal resistance values of RθJA = 75 °C/W and RθJL = 15.4 °C/W - enabling accurate thermal modeling in high-reliability PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 418 V to 462 V at IT = 1.0 mA - defines reliable conduction onset under overvoltage stress |
| VWM | 376 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 602 V at 2.5 A peak pulse current - clamping level that determines protected circuit's voltage ceiling during transients |
| PPPM | 1500 W (10/1000 µs waveform) - surge energy absorption capacity without failure |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-current inductive switching surges without bond wire fusing |
| TJ Range | -55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | Case Style 1.5KE (DO-201AD) - axial-leaded, epoxy-molded package rated UL 94 V-0, compatible with wave soldering (275 °C, 10 s max) |
Pinout & Package
1.5KE440A-E3/51 uses the standard DO-201AD axial package (Case Style 1.5KE), with cathode indicated by a color band on one end. The device has two terminals: anode and cathode - no internal complexity or multi-pin configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential side of protected line | Must be tied to ground or return path when used in unidirectional clamp configuration |
| Cathode | Current exit point in forward bias; marked with color band; connected to protected line | Acts as the "clamp node" - shunts surge current to ground when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports MIL-STD-1275E and ISO 7637-2 Pulse 5a/b surge immunity without external series impedance |
| Clamping response time < 1 ns | Protects sensitive gate oxides (e.g., MOSFETs, SiC drivers) before destructive voltage overshoot occurs |
| RoHS-compliant, matte tin-plated leads | Meets J-STD-002/JESD 22-B102 solderability standards and JESD 201 Class 1A whisker resistance |
| UL 94 V-0 molded epoxy body | Provides flame-retardant mechanical encapsulation suitable for safety-critical power supply designs |
Applications
| Industrial Power Supply Input Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protects AC/DC front-end rectifiers and PFC stages against lightning-induced surges on 400 V DC bus lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC+ and chassis ground to clamp positive transients only. Use Value: Limits voltage excursion to ≤602 V during 10/1000 µs surges, preventing damage to 600 V-rated bridge rectifiers and bulk capacitors. |
Use Scenario: Shields Ethernet PHY or RS-485 transceivers on outdoor base station backhaul links exposed to induced lightning. IC Role / Device Role / Timing Role: Primary protection stage ahead of GDT or polymer PTC, absorbing >90% of surge energy before secondary clamping. Use Value: Withstands 2.5 A peak pulse current while maintaining clamping below 602 V - preserving signal integrity and IC latch-up immunity. |
| Motor Drive DC Bus Protection | Renewable Energy Inverter DC Link |
Use Scenario: Guards IGBT gate drivers and bootstrap circuits against inductive kickback from 480 VAC motor windings. IC Role / Device Role / Timing Role: Mounted directly across DC link capacitor terminals to suppress commutation spikes. Use Value: Fast <1 ns response ensures clamping initiates before driver ICs experience overvoltage beyond absolute maximum ratings. |
Use Scenario: Safeguards string-level MPPT controllers in solar inverters subjected to grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to negative rail, protecting boost converter MOSFETs and controller ICs. Use Value: 175 °C max junction temperature rating allows operation in sealed outdoor enclosures without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440A | DO-214AA package (SMB), 600 W PPPM, same VBR range (418–462 V), lower IPPM (1.7 A), higher VC (648 V) | Surface-mount layout; unsuitable for high-energy 1500 W surges; better for space-constrained PCBs with moderate threat levels | Select SMBJ440A only if board space is constrained and surge energy is limited to ≤600 W - not a drop-in replacement for 1.5KE440A-E3/51's axial high-power capability |
| 1.5KE440CA | Bidirectional variant (same VBR, VC, PPPM); symmetrical clamping for AC-coupled lines; no polarity marking | Required for differential signal lines (e.g., RS-422, CAN FD) where both polarities must be suppressed | Choose 1.5KE440CA only when protecting bidirectional signals - 1.5KE440A-E3/51 is unidirectional and cannot suppress negative transients |
Compared with SMBJ440A, 1.5KE440A-E3/51 delivers 2.5× higher surge power handling and lower clamping voltage in axial through-hole form; compared with 1.5KE440CA, it offers polarity-specific optimization for DC rail protection but lacks bidirectional symmetry - selection depends strictly on surge profile, mounting method, and signal polarity requirements.
Availability
1.5KE440A-E3/51 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line interfaces, motor drive DC bus protection, and renewable energy inverter DC link applications requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE440A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure systems where 1500 W surge immunity and extended temperature operation are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE440A-E3/51?
The 1.5KE440A-E3/51 has a specified breakdown voltage (VBR) range of 418 V to 462 V at test current IT = 1.0 mA, representing ±5% tolerance around the nominal 440 V rating. This tight tolerance ensures predictable clamping onset across production lots and supports precise overvoltage margining in safety-critical designs.
Is 1.5KE440A-E3/51 RoHS compliant and lead-free?
Yes, the 1.5KE440A-E3/51 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 6(c)-IV. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 1A whisker resistance testing - confirmed in Vishay Document Number 88301, Revision 09-Aug-2022.
Can 1.5KE440A-E3/51 be used in bidirectional signal protection?
No, 1.5KE440A-E3/51 is a unidirectional TVS diode - it clamps only positive transients relative to its cathode. For bidirectional protection (e.g., AC lines or differential buses), the 1.5KE440CA variant must be used. Using 1.5KE440A-E3/51 on bidirectional signals leaves negative excursions unprotected and risks device failure.
What is the maximum clamping voltage of 1.5KE440A-E3/51 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE440A-E3/51 is 602 V at IPPM = 2.5 A with 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 surge events - critical for verifying downstream component voltage margins.
Does 1.5KE440A-E3/51 meet AEC-Q101 qualification?
No, 1.5KE440A-E3/51 is commercial-grade only. Per Vishay documentation, AEC-Q101 qualification applies only to variants with "HE3" suffix (e.g., 1.5KE440AHE3_B) - which are not identical to 1.5KE440A-E3/51 in qualification status, revision code, or reliability testing scope.
1.5KE440A-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):
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE440A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440A-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 1.5KE440A-E3/51 reliable?
The price and inventory of 1.5KE440A-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 1.5KE440A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE440A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE440A-E3/51?
1.5KE440A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440A-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 1.5KE440A-E3/51?
For technical support, including 1.5KE440A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE440A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE440A-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 1.5KE440A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE440A-E3/51?
All 1.5KE440A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440A-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 1.5KE440A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE440A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440A-E3/51 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
