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Vishay General Semiconductor - Diodes Division 1.5KE440CA-E3/54
- Part No.:
- 1.5KE440CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440CA-E3/54.pdf
- Description:
- TVS DIODE 376VWM 602VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,663
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Product details
Overview
1.5KE440CA-E3/54 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, and 1500 W peak pulse power dissipation with a 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching spikes in industrial and automotive systems.
For engineers reviewing the 1.5KE440CA-E3/54 datasheet, 1.5KE440CA-E3/54 pinout, 1.5KE440CA-E3/54 application, or 1.5KE440CA-E3/54 equivalent, this device delivers verified bidirectional clamping performance, RoHS-compliant commercial-grade packaging, and precise transient response (<1 ns) critical for protecting sensitive analog front-ends, DC bus lines, and CAN/LIN physical layers where voltage overshoot must be limited below 602 V under 2.5 A surge conditions.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, leveraging an avalanche breakdown mechanism to divert transient energy away from downstream circuitry. Its bidirectional structure enables symmetrical clamping in both polarities without polarity marking, supporting AC-coupled or floating signal paths such as Ethernet PHY interfaces or isolated power supply rails.
It exhibits low incremental surge resistance and fast sub-nanosecond response time, enabling effective suppression of ESD (IEC 61000-4-2), lightning surges (IEC 61000-4-5), and inductive kickback. Thermal resistance is specified at RθJL = 15.4 °C/W (junction-to-lead), confirming suitability for lead-mounted PCB applications without heatsinking under short-duration pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 376 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 418–462 V at 1 mA - guaranteed avalanche initiation 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; limits stress on downstream components |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capacity for standardized 10/1000 µs waveform; supports robust protection in harsh electrical environments |
| IPPM (Peak Pulse Current) | 2.5 A - maximum non-repetitive surge current it can safely clamp; determines minimum series impedance required upstream |
| TJ max. | 175 °C - maximum junction temperature rating; allows operation in high-ambient industrial enclosures without derating |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads; compatible with wave soldering (275 °C, 10 s max) |
Pinout & Package
1.5KE440CA-E3/54 uses the standard DO-201AD axial-leaded package (Case Style 1.5KE), with no polarity marking due to its bidirectional construction. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. The device has two terminals: anode and cathode are functionally interchangeable in bidirectional mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity surge) | Conducts during negative-going transients; forms symmetrical clamping path with cathode |
| Cathode | Transient current entry point (positive polarity surge) | Conducts during positive-going transients; completes bidirectional clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports protection against severe lightning surges (IEC 61000-4-5 Level 4) on 24–48 V DC distribution lines |
| Sub-nanosecond response time | Clamps transients before sensitive logic or analog circuits experience damaging overvoltage |
| Low incremental surge resistance | Minimizes voltage overshoot during high di/dt events, improving clamping precision |
| RoHS-compliant, commercial grade (E3 suffix) | Meets environmental compliance requirements without AEC-Q101 qualification constraints |
Applications
| Industrial Motor Drive DC Bus Protection | Automotive Body Control Module (BCM) Sensor Inputs |
|---|---|
Use Scenario: Suppresses inductive kickback from relay coils and solenoid drivers on 48 V DC bus rails in factory automation controllers. IC Role / Device Role / Timing Role: Shunt-type transient limiter placed across bus input, clamping voltage to ≤602 V within <1 ns to protect upstream DC-DC converters and microcontrollers. Use Value: Prevents latch-up or gate oxide damage in MOSFET half-bridges by limiting bus overvoltage during rapid load disconnection. |
Use Scenario: Protects LIN bus transceivers and analog sensor inputs (e.g., temperature, position) from battery dump and load-dump transients in vehicle body electronics. IC Role / Device Role / Timing Role: Bidirectional clamping element connected between signal line and ground, responding equally to positive/negative spikes up to ±602 V. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (load dump) by holding line voltage within safe operating range of 3.3 V/5 V interface ICs. |
| Telecom Remote Terminal Power Feeds | Renewable Energy Inverter DC Link Monitoring |
Use Scenario: Shields Ethernet PHYs and PoE controllers in outdoor telecom cabinets exposed to induced lightning on copper pairs. IC Role / Device Role / Timing Role: Primary surge suppressor on secondary-side DC feeds, placed before isolation barriers and LDO regulators. Use Value: Absorbs 1500 W surges without degradation, preserving data link uptime and avoiding costly field replacements. |
Use Scenario: Guards voltage sense inputs monitoring high-voltage DC links (400–800 V) in solar inverters during grid fault recovery. IC Role / Device Role / Timing Role: High-VWM clamping diode mounted directly at ADC input divider network to prevent overvoltage saturation. Use Value: Enables accurate DC link measurement during transient events by limiting sensed voltage to 602 V, avoiding ADC rail-to-rail saturation and firmware lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440CA | Lower peak pulse power (600 W), smaller SMB package (surface-mount), lower IPPM (1.9 A) | Not suitable for 1500 W surge environments; preferred for space-constrained PCBs with moderate threat levels | Select when board area is constrained and surge energy is ≤600 W (e.g., consumer IoT gateways) |
| 1.5KE440A-E3/54 | Unidirectional version; includes cathode band marking; identical VBR, VC, and PPPM ratings | Requires correct polarity placement; used where only positive-going transients dominate (e.g., single-supply DC rails) | Choose when system topology guarantees unidirectional surge direction and polarity-aware layout is feasible |
Compared with SMBJ440CA and 1.5KE440A-E3/54, the 1.5KE440CA-E3/54 uniquely combines bidirectional symmetry, 1500 W capability, and through-hole mechanical robustness - making it optimal for high-energy, polarity-agnostic protection in industrial power supplies and transportation electronics where reliability under repeated surge stress is mandatory.
Availability
1.5KE440CA-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive BCMs, telecom remote terminals, and renewable energy inverters requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE440CA-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 demanding industrial and transportation applications, delivering consistent clamping performance across wide temperature ranges and extended service life under repetitive surge stress.
FAQ
What is the clamping voltage of the 1.5KE440CA-E3/54 under full-rated surge conditions?
The 1.5KE440CA-E3/54 has a maximum clamping voltage (VC) of 602 V at a peak pulse current (IPPM) of 2.5 A with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the highest voltage the protected circuit will experience during a full-rated transient event. The 1.5KE440CA-E3/54 maintains this clamping performance across its specified operating temperature range of –55 °C to +175 °C.
Is the 1.5KE440CA-E3/54 suitable for automotive applications requiring AEC-Q101 qualification?
No, the 1.5KE440CA-E3/54 is a commercial-grade part with the E3 suffix and is not AEC-Q101 qualified. Vishay offers AEC-Q101 variants under the HE3 suffix (e.g., 1.5KE440CAHE3_B), but those are distinct orderable parts. The 1.5KE440CA-E3/54 is intended for industrial, telecom, and general-purpose surge protection where automotive qualification is not mandated.
How does the bidirectional design of the 1.5KE440CA-E3/54 affect its PCB layout and mounting?
The 1.5KE440CA-E3/54 has no polarity marking and functions identically in either orientation, simplifying PCB layout and eliminating risk of reverse installation. It uses axial leads in the DO-201AD package and mounts directly across protected nodes (e.g., line-to-ground or line-to-line). No orientation-dependent routing or silkscreen indicators are needed - unlike unidirectional variants such as 1.5KE440A-E3/54, which require cathode-band alignment.
What is the thermal resistance and power derating behavior of the 1.5KE440CA-E3/54?
The 1.5KE440CA-E3/54 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and a junction-to-ambient value (RθJA) of 75 °C/W. Its steady-state power dissipation (PD) is rated at 6.5 W at TL = 75 °C, derating linearly above that temperature. For transient suppression, thermal mass dominates - so derating applies only to continuous dissipation, not to short-pulse surge events.
Can the 1.5KE440CA-E3/54 be used in parallel to increase surge current handling?
Yes, multiple 1.5KE440CA-E3/54 units may be paralleled to increase total IPPM capacity, but matching VBR tolerances (±5 %) and ensuring symmetrical PCB trace inductance is essential to achieve balanced current sharing. Vishay recommends using matched lots and low-inductance layout practices; for higher reliability, consider higher-power alternatives like 3KP440CA instead of parallelization.
1.5KE440CA-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:
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE440CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440CA-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 1.5KE440CA-E3/54 reliable?
The price and inventory of 1.5KE440CA-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 1.5KE440CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE440CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE440CA-E3/54?
1.5KE440CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440CA-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 1.5KE440CA-E3/54?
For technical support, including 1.5KE440CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE440CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE440CA-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 1.5KE440CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE440CA-E3/54?
All 1.5KE440CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440CA-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 1.5KE440CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE440CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440CA-E3/54 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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