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Vishay General Semiconductor - Diodes Division 1.5KE440CA-E3/51
- Part No.:
- 1.5KE440CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440CA-E3/51.pdf
- Description:
- TVS DIODE 376VWM 602VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,280
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Product details
Overview
1.5KE440CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 440 V standoff voltage (VWM), 418–462 V breakdown voltage (VBR) at 1 mA, 602 V clamping voltage (VC) at 2.5 A peak pulse current (IPPM), and 1500 W peak pulse power capability with a 10/1000 µs waveform. It is used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom infrastructure.
For engineers reviewing the 1.5KE440CA-E3/51 datasheet, 1.5KE440CA-E3/51 pinout, 1.5KE440CA-E3/51 application, or 1.5KE440CA-E3/51 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, RoHS-compliant packaging, and direct alternative part comparisons - all grounded in Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional CA construction. Its 1500 W peak pulse power rating is defined per 10/1000 µs waveform at TA = 25 °C, with thermal derating above 25 °C per Figure 2 and junction-to-lead thermal resistance of 15.4 °C/W.
Clamping performance is characterized by low incremental surge resistance and sub-nanosecond response time (<1 ns), enabling effective suppression of lightning-induced transients and inductive switching spikes. The device exhibits a temperature coefficient of VBR of +0.110 %/°C and maximum reverse leakage of 1.0 µA at VWM = 376 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 376 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 418–462 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 602 V at IPPM = 2.5 A - Peak voltage seen by protected circuit during full-rated 10/1000 µs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capacity for transient suppression without failure under standardized waveform. |
| Operating Temperature | –55 °C to +175 °C - Enables deployment in harsh environments including automotive under-hood and industrial motor drives. |
| Package Thermal Resistance | RθJL = 15.4 °C/W - Supports reliable power dissipation when mounted on PCB copper pours or heatsinks with short lead lengths. |
| Leakage Current | ID ≤ 1.0 µA at VWM - Minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
Pinout & Package
1.5KE440CA-E3/51 uses the industry-standard Case Style 1.5KE DO-201AD package: molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, and RoHS compliant (E3 suffix). Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output for bidirectional surge current; no cathode band marking required. |
| Lead 1 / Lead 2 | Thermal and electrical interface | Directly bonded to internal chip; primary heat transfer path to PCB copper (RθJL = 15.4 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics over lifetime and temperature; eliminates surface degradation risks. |
| 1500 W 10/1000 µs pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with low-inductance traces. |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience damaging overvoltage - critical for protecting high-speed logic and analog front-ends. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising surges (e.g., ESD or inductive kick), improving clamping precision. |
| RoHS-compliant E3 termination | Meets JESD 201 Class 1A whisker resistance; suitable for lead-free reflow and long-term reliability in commercial applications. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of DC bus inputs against load dump and regenerative braking surges in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±600 V transients before they reach rectifier bridges and gate drivers. Use Value: Prevents catastrophic failure of IGBT modules and control ICs during 1500 W surge events with <1 ns reaction time. |
Use Scenario: Input-stage surge protection in -48 V telecom rectifiers exposed to lightning-induced line surges on central office feeds. IC Role / Device Role / Timing Role: Primary clamping element on AC/DC input side, coordinated with MOVs to handle multi-pulse threat profiles. Use Value: Maintains 376 V working margin while clamping to 602 V - preserving upstream fuse coordination and downstream DC-DC converter integrity. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
Use Scenario: Protection of LIN/CAN transceiver power rails against battery line transients (ISO 7637-2 Pulse 1/2a/5a) in BCMs. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail, downstream of main fuse and upstream of LDO regulators. Use Value: Withstands repetitive 10/1000 µs pulses at 0.01% duty cycle - essential for endurance testing compliance. |
Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog I/O modules from field wiring ESD and inductive coupling. IC Role / Device Role / Timing Role: Bidirectional shunt device across loop terminals, limiting differential-mode transients to safe levels for op-amp front-ends. Use Value: 1.0 µA max leakage at 376 V ensures minimal error injection into precision current measurement paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440CA | Same VWM (376 V) and VC (602 V), but lower PPPM (600 W); DO-214AA package with smaller footprint and higher RθJA (90 °C/W). | Better suited for space-constrained PCBs where 600 W surge rating suffices; less effective in sustained or repeated surge scenarios. | Select SMBJ440CA only if layout area is limited and thermal management supports higher junction temperatures. |
| 1.5SMC440CA | Identical electrical specs (VWM, VBR, VC, PPPM), but SMC (DO-214AB) package with RθJL = 18.5 °C/W and 1.2 g weight vs. 0.968 g for 1.5KE440CA-E3/51. | Compatible in high-reliability industrial designs requiring alternate form factor; slightly reduced thermal efficiency than 1.5KE. | Choose 1.5SMC440CA when leveraging existing SMC footprint or requiring tighter mechanical robustness in vibration-prone environments. |
Compared with 1.5KE440CA-E3/51, SMBJ440CA trades 60% peak power and thermal performance for compactness, while 1.5SMC440CA matches electrical behavior but requires layout adaptation and offers marginally lower thermal conductivity - making 1.5KE440CA-E3/51 optimal for high-energy, thermally demanding deployments.
Availability
1.5KE440CA-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE440CA-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 and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in industrial, telecom, and automotive systems - prioritizing robust avalanche stability, repeatable clamping, and extended temperature operation up to +175 °C.
FAQ
What is the clamping voltage of the 1.5KE440CA-E3/51 under full-rated surge conditions?
The 1.5KE440CA-E3/51 has a maximum clamping voltage (VC) of 602 V at a peak pulse current (IPPM) of 2.5 A, measured using the standard 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during a full 1500 W transient event and is confirmed in Vishay Document #88301, Table on page 2.
Is the 1.5KE440CA-E3/51 suitable for automotive applications requiring AEC-Q101 qualification?
No, the 1.5KE440CA-E3/51 is not AEC-Q101 qualified. Per Vishay Document #88301, AEC-Q101 qualification applies only to 1.5KE6.8CAHE3_B through 1.5KE220CAHE3_B variants. The 1.5KE440CA-E3/51 is commercial-grade and intended for industrial and telecom use where extended temperature range (–55 °C to +175 °C) is required but automotive qualification is not mandated.
How does the bidirectional design of the 1.5KE440CA-E3/51 affect its mounting and circuit integration?
The 1.5KE440CA-E3/51 has no polarity marking - both terminals are functionally identical - simplifying PCB layout and eliminating orientation errors during assembly. It must be placed across the protected nodes (e.g., line-to-line or line-to-ground) without regard to direction, unlike unidirectional TVS diodes which require correct cathode alignment relative to system ground.
What is the thermal resistance from junction to lead (RθJL) for the 1.5KE440CA-E3/51, and why does it matter?
The 1.5KE440CA-E3/51 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, per Vishay Document #88301, page 3. This low value enables efficient heat transfer from the silicon die to the PCB copper via the leads - critical for sustaining repetitive surges and avoiding thermal runaway during high-duty-cycle operation.
Can the 1.5KE440CA-E3/51 be used in parallel to increase surge handling capacity?
Yes, the 1.5KE440CA-E3/51 can be paralleled to increase total peak pulse power, but only with careful attention to matching VBR (±5% recommended) and symmetrical PCB layout to ensure current sharing. Vishay explicitly states in Application Notes (page 5) that TVS diodes "can also be used in series or parallel to increase the peak power ratings," subject to proper derating and layout controls.
1.5KE440CA-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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE440CA-E3/51 FAQ
1.How can I place an order for 1.5KE440CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440CA-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 1.5KE440CA-E3/51 reliable?
The price and inventory of 1.5KE440CA-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 1.5KE440CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE440CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440CA-E3/51 transactions.
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4.How is shipping managed for 1.5KE440CA-E3/51?
1.5KE440CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440CA-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 1.5KE440CA-E3/51?
For technical support, including 1.5KE440CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE440CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE440CA-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 1.5KE440CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE440CA-E3/51?
All 1.5KE440CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440CA-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 1.5KE440CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE440CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440CA-E3/51 Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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