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Vishay General Semiconductor - Diodes Division 1.5KE440-E3/54
- Part No.:
- 1.5KE440-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440-E3/54.pdf
- Description:
- TVS DIODE 356VWM 631VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,741
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Product details
Overview
1.5KE440-E3/54 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 standoff 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 motor drives and telecom power supplies.
For engineers reviewing the 1.5KE440-E3/54 datasheet, 1.5KE440-E3/54 pinout, 1.5KE440-E3/54 application, or 1.5KE440-E3/54 equivalent, this page delivers verified electrical parameters, thermal resistance (RθJA = 75 °C/W), JEDEC-standard 1.5KE package dimensions, polarity marking convention, and real-world selection guidance against comparable TVS diodes 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 impulse waveform, with derating applied above 25 °C ambient per JEDEC curves - enabling robust transient suppression in high-temperature environments.
It supports single-pulse surge handling up to 2.5 A (IPPM) at 602 V clamping, with 3.5–5.0 V forward voltage (VF) depending on breakdown range (≥250 V devices use 5.0 V). The device is RoHS-compliant (E3 suffix), commercial-grade only, and not AEC-Q101 qualified - distinguishing it from HE3-suffix automotive variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 418 V / 462 V - ensures reliable conduction onset above system operating voltage while avoiding false triggering during transients. |
| VWM | 376 V - maximum continuous reverse working voltage; defines safe DC operating margin before leakage increases sharply. |
| VC @ IPPM | 602 V - clamping voltage at 2.5 A peak pulse; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 1500 W - peak pulse power dissipation capability with 10/1000 µs waveform; enables protection against lightning-induced surges per IEC 61000-4-5. |
| IPPM | 2.5 A - peak pulse current corresponding to VC; used with PCB trace impedance to estimate let-through energy. |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs heatsinking requirements when operating near PD = 6.5 W limit. |
| TJ max. | +175 °C - maximum junction temperature; allows operation in high-ambient industrial enclosures without derating. |
Pinout & Package
Package: JEDEC Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.042" (1.07 mm) lead diameter. Cathode indicated by color band on case end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to lower-potential side of protected line; must be routed with low-inductance path to ground reference. |
| Cathode | Current exit point under forward bias; marked with band | Connected to higher-potential side (e.g., +48 V rail); clamps to ground when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under repeated surge stress without parameter drift. |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity testing on 48 V telecom and industrial control inputs. |
| Sub-nanosecond response time | Clamps within <1 ns - faster than MOVs or GDTs - preserving integrity of fast-switching MOSFET gates and ADC references. |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test; suitable for lead-free reflow assembly without solder joint degradation risk. |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt events, reducing stress on protected ICs such as Ethernet PHYs and CAN transceivers. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 48 V DC input stage against inductive kickback from relay coils and contactor switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +48 V rail and chassis ground to clamp positive-going transients. Use Value: Limits let-through voltage to ≤602 V, preventing damage to upstream DC-DC controllers and isolated gate drivers. |
Use Scenario: Surge suppression on primary-side rectified output of AC/DC front-end supplying PoE injectors. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 10/1000 µs lightning surges coupled via AC mains or Ethernet ports. Use Value: Maintains system uptime by diverting >1500 W pulses away from sensitive PWM controllers and optocouplers. |
| Automotive Body Control Modules | Industrial PLC I/O Cards |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail feeding MCU peripherals, coordinated with primary fusing. Use Value: Survives 12 V system transients up to 35 V/100 ms while maintaining <1 µA leakage at 376 V standby. |
Use Scenario: Input protection for analog sensor channels (e.g., 4–20 mA loops) exposed to field wiring surges. IC Role / Device Role / Timing Role: High-VWM TVS placed before precision op-amp input stages to prevent latch-up or burnout. Use Value: Enables ±0.1 % measurement accuracy by limiting clamping-induced offset shift during 2.5 A surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440A | DO-214AA package; 440 V VBR, 648 V VC @ 2.3 A; 600 W PPPM; RθJA = 50 °C/W | Lower power rating and smaller footprint; suited for space-constrained PCBs but requires tighter thermal management. | Select SMBJ440A when board area is limited and surge duty cycle is low; verify thermal margin using RθJA = 50 °C/W. |
| 1.5SMC440A | SMA package; same VBR/VC specs; 1500 W PPPM; RθJA = 60 °C/W; 0.25" lead length | Smaller case size than 1.5KE; lower thermal mass; less robust mechanical mounting for high-vibration environments. | Choose 1.5SMC440A for cost-sensitive consumer designs where vibration is minimal and lead-forming flexibility is needed. |
Compared with 1.5KE440-E3/54, SMBJ440A offers reduced board footprint but sacrifices 40 % peak power handling and requires more aggressive thermal design, while 1.5SMC440A matches power rating but trades mechanical ruggedness and thermal stability for compactness - making 1.5KE440-E3/54 optimal for high-reliability industrial power interfaces.
Availability
1.5KE440-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and PLC I/O cards requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for 1.5KE440-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, thermal performance, and industry-standard qualification.
The 1.5KE series was engineered for high-energy transient suppression in industrial and telecom infrastructure, targeting applications demanding robust 1500 W surge handling and wide temperature operation without automotive qualification overhead.
FAQ
What is the breakdown voltage tolerance for 1.5KE440-E3/54?
The 1.5KE440-E3/54 has a specified breakdown voltage range of 418 V to 462 V at 1.0 mA test current, representing a ±5 % tolerance around the nominal 440 V rating. This tight tolerance ensures predictable clamping onset across production lots and supports precise overvoltage margining in 48 V and 60 V systems where 1.5KE440-E3/54 is commonly deployed.
Is 1.5KE440-E3/54 suitable for automotive applications?
No, 1.5KE440-E3/54 is commercial-grade only and not AEC-Q101 qualified. Vishay offers HE3-suffix variants (e.g., 1.5KE440AHE3_B) for automotive use, but the E3/54 version lacks the required stress testing and traceability. For body control modules or infotainment power rails, engineers must select the HE3 variant or confirm qualification status directly with Vishay before using 1.5KE440-E3/54.
How does the clamping voltage of 1.5KE440-E3/54 compare to its breakdown voltage?
The 1.5KE440-E3/54 clamps at 602 V when subjected to its rated 2.5 A peak pulse current (IPPM), which is approximately 36 % higher than its minimum breakdown voltage of 418 V. This VC/VBR ratio reflects the device's low dynamic impedance and confirms effective energy diversion - critical for protecting downstream components like DC-DC controllers that tolerate ≤650 V absolute maximum ratings.
What is the maximum reverse leakage current for 1.5KE440-E3/54 at rated standoff voltage?
At its maximum standoff voltage of 376 V and ambient temperature of 25 °C, the 1.5KE440-E3/54 exhibits ≤1.0 µA reverse leakage current (ID). This ultra-low leakage preserves efficiency in always-on power monitoring circuits and avoids false triggering in high-impedance sensor bias networks where 1.5KE440-E3/54 is often integrated for fault-tolerant design.
Can 1.5KE440-E3/54 be used in bidirectional configurations?
No, 1.5KE440-E3/54 is unidirectional only. Bidirectional versions in the 1.5KE family are limited to part numbers ending in "CA" and capped at 1.5KE220CA; 1.5KE440A has no bidirectional counterpart. To protect AC-coupled or differential lines, engineers must use two 1.5KE440-E3/54 devices in series-opposed configuration or select a dedicated bidirectional TVS with matching VBR rating.
1.5KE440-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:
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE440-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440-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 1.5KE440-E3/54 reliable?
The price and inventory of 1.5KE440-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 1.5KE440-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE440-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE440-E3/54?
1.5KE440-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440-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 1.5KE440-E3/54?
For technical support, including 1.5KE440-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440-E3/54 requirements.
6.How does Aetrix verify that 1.5KE440-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE440-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 1.5KE440-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE440-E3/54?
All 1.5KE440-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440-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 1.5KE440-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE440-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440-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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D12V0L1B2LP-7B
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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