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Vishay General Semiconductor - Diodes Division 1.5KE400C-E3/54
- Part No.:
- 1.5KE400C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400C-E3/54.pdf
- Description:
- TVS DIODE 324VWM 574VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,086
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Product details
Overview
1.5KE400C-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 400 V standoff voltage (VWM), 459 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), clamping voltage of 548 V at 2.7 A IPPM, and operates from –55 °C to +175 °C. It protects MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE400C-E3/54 datasheet, 1.5KE400C-E3/54 pinout, 1.5KE400C-E3/54 application, or 1.5KE400C-E3/54 equivalent, this device serves as a robust, glass-passivated, RoHS-compliant TVS for industrial power supplies, automotive ECUs, telecom line cards, and industrial sensor front-ends requiring fast clamping (<1 ns), low incremental surge resistance, and AEC-Q101 qualification readiness.
Technical Context
The 1.5KE400C-E3/54 implements a silicon avalanche junction structure optimized for bidirectional transient suppression. Its symmetrical breakdown behavior ensures identical clamping in both polarities, with a temperature coefficient of 0.110 %/°C and thermal resistance of 15.4 °C/W (junction-to-lead). It responds within <1 ns to ESD and lightning surges per IEC 61000-4-5.
Designed for unclamped operation under normal bias, it conducts only during overvoltage events exceeding its 459 V minimum VBR. The 1.5KE400C-E3/54 sustains 2.7 A peak pulse current (IPPM) at 10/1000 µs while limiting voltage to 548 V - critical for protecting 400 V-rated bus rails and high-voltage gate drivers without crowbarring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 342 V - maximum continuous reverse operating voltage before conduction begins; sets safe margin below 400 V system rail. |
| VBR (min) | 380 V - guaranteed avalanche onset threshold; ensures reliable triggering above nominal bus voltage. |
| VC @ IPPM | 548 V - clamped voltage at 2.7 A peak pulse; defines worst-case stress on downstream components. |
| PPPM | 1500 W - peak surge energy handling (10/1000 µs); supports Level 4 IEC 61000-4-5 compliance. |
| TJ max | +175 °C - extended junction temperature rating enables use in under-hood automotive and high-ambient industrial environments. |
| Package | DO-201AD (Case Style 1.5KE) - industry-standard axial lead package with 0.375" lead length; compatible with through-hole reflow and wave soldering. |
Pinout & Package
1.5KE400C-E3/54 uses the DO-201AD axial-leaded package (Case Style 1.5KE), with no polarity marking - consistent with bidirectional TVS construction. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, rated for 275 °C dip soldering (10 s max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | No functional distinction between leads; either terminal serves as input/output for transient energy diversion in both directions. |
| Lead 1 / Lead 2 | Current path to PCB ground plane or protected node | Leads conduct surge current directly to chassis or reference plane; low RθJL (15.4 °C/W) enables efficient heat transfer during repetitive pulses. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics over 1000+ surge cycles without parameter drift. |
| 1500 W peak pulse power (10/1000 µs) | Supports single-event lightning surge immunity up to 4 kV (IEC 61000-4-5, 2 Ω source impedance). |
| Clamping ratio VC/VBR = 1.44 | Minimizes overvoltage overshoot during fast transients - critical for safeguarding 400 V-class SiC MOSFET gate drivers. |
| Response time < 1 ns | Engages before most semiconductor failure mechanisms initiate, preventing latch-up or thermal runaway in protected ICs. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets JESD 201 Class 1A whisker resistance; suitable for consumer, industrial, and telecom applications without AEC-Q101 requirement. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protects 380–400 V DC bus inputs in DIN-rail power supplies against load dump and capacitor discharge transients. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across input terminals to divert >1 kA surge currents away from upstream rectifiers and downstream DC-DC controllers. Use Value: Limits transient voltage to ≤548 V, preserving reliability of 600 V-rated electrolytic capacitors and reducing need for oversized input filtering. | Use Scenario: Shields LIN bus interface ICs and microcontroller I/O pins in body control modules from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Fast-response TVS connected between LIN line and chassis ground, activated within 1 ns to clamp spikes before MCU GPIO damage occurs. Use Value: Maintains signal integrity during 100 V/10 ms load dump events per ISO 7637-2 Pulse 5a, enabling robust communication without external series resistors. |
| Telecom Line Card Surge Protection | Industrial Sensor Signal Conditioning |
Use Scenario: Safeguards Ethernet PHY and PoE controller inputs on outdoor telecom base station line cards exposed to induced lightning surges. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point, absorbing up to 1500 W of common-mode surge energy before secondary protection stages engage. Use Value: Reduces required PCB area versus multi-stage protection schemes while meeting GR-1089-CORE Level 4 requirements for AC/DC power ports. | Use Scenario: Protects analog front-end of 4–20 mA current loop sensors in factory automation systems subjected to relay coil flyback and motor drive coupling. IC Role / Device Role / Timing Role: Bidirectional clamp across sensor output terminals, suppressing ±1 kV EFT bursts (IEC 61000-4-4) and 4 kV ESD (IEC 61000-4-2). Use Value: Prevents offset drift and calibration loss in precision op-amps by limiting transient-induced junction heating to <5 °C rise per event. |
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 SMAJ400A | Unidirectional; 400 V VWM; 552 V VC @ 2.6 A; DO-214AC (SMA) package; 600 W PPPM. | Lower power rating and unidirectional polarity require redesign for bidirectional surge paths; unsuitable for AC-coupled or floating signal lines. | Select only if board layout allows polarity-aware placement and system surge energy is ≤600 W. |
| ON Semiconductor 1.5SMC400CA | Bidirectional; 400 V VWM; 548 V VC @ 2.7 A; DO-214AB (SMC) package; 1500 W PPPM; AEC-Q101 qualified. | Surface-mount SMC package reduces footprint but requires rework for through-hole legacy designs; higher qualification level adds cost where not mandated. | Preferred for new SMT designs needing automotive qualification; not drop-in for 1.5KE400C-E3/54's axial footprint. |
Compared with 1.5KE400C-E3/54, SMAJ400A offers lower surge capacity and unidirectional operation - limiting use to DC-biased rails - while 1.5SMC400CA matches electrical performance but shifts to SMT packaging and adds AEC-Q101, increasing cost and requiring PCB redesign.
Availability
1.5KE400C-E3/54 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom infrastructure, and sensor interface circuits requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE400C-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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and ruggedized packaging.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting industrial motor drives, automotive power distribution, and telecom infrastructure where 1500 W surge capability and 175 °C operation are essential.
FAQ
What is the clamping voltage of the 1.5KE400C-E3/54 under a 10/1000 µs surge?
The 1.5KE400C-E3/54 clamps to a maximum of 548 V when subjected to its rated peak pulse current of 2.7 A with a 10/1000 µs waveform. This value is measured per JEDEC standard test conditions and represents the upper limit of voltage seen by protected circuitry during a full-power transient event. The 1.5KE400C-E3/54 maintains this clamping performance across its specified operating temperature range.
Is the 1.5KE400C-E3/54 suitable for automotive applications?
The 1.5KE400C-E3/54 is RoHS-compliant and rated for –55 °C to +175 °C operation, making it technically viable for under-hood and powertrain-adjacent automotive functions. However, it carries the commercial-grade E3 suffix - not the HE3 suffix required for AEC-Q101 qualification. For production automotive ECUs, the 1.5KE400AHE3_B variant (AEC-Q101 qualified) should be selected instead of the 1.5KE400C-E3/54.
How does the bidirectional nature of the 1.5KE400C-E3/54 affect its circuit placement?
The 1.5KE400C-E3/54 has no anode/cathode designation and functions identically in both directions, allowing placement across any two nodes subject to differential or common-mode transients - such as AC mains inputs, transformer secondaries, or floating sensor outputs. Unlike unidirectional TVS diodes, it requires no orientation check during assembly and eliminates risk of reverse-polarity installation errors in 1.5KE400C-E3/54-based designs.
What is the thermal resistance of the 1.5KE400C-E3/54, and how does it impact surge handling?
The 1.5KE400C-E3/54 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W. This low value enables rapid heat dissipation from the silicon junction into PCB copper or heatsinking leads during repetitive surge events. When mounted with ≥0.375" (9.5 mm) lead length and adequate copper area, the 1.5KE400C-E3/54 can sustain multiple 1500 W pulses without exceeding its 175 °C maximum junction temperature.
Can the 1.5KE400C-E3/54 be used in parallel to increase surge current capacity?
Yes - the 1.5KE400C-E3/54 may be paralleled to increase total peak pulse current handling, provided matched units are used and layout minimizes current imbalance (e.g., symmetrical trace lengths, shared thermal plane). However, derating is required: two 1.5KE400C-E3/54 devices do not deliver exactly 2×2.7 A due to minor VBR tolerances. For precise high-current protection, consider higher-rated single devices like 3KP400CA instead of paralleling 1.5KE400C-E3/54 units.
1.5KE400C-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):
- 324V
- Voltage - Breakdown (Min):
- 360V
- Voltage - Clamping (Max) @ Ipp:
- 574V
- Current - Peak Pulse (10/1000µs):
- 2.6A
- 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
1.5KE400C-E3/54 FAQ
1.How can I place an order for 1.5KE400C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400C-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 1.5KE400C-E3/54 reliable?
The price and inventory of 1.5KE400C-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 1.5KE400C-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE400C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400C-E3/54?
1.5KE400C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400C-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 1.5KE400C-E3/54?
For technical support, including 1.5KE400C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400C-E3/54 requirements.
6.How does Aetrix verify that 1.5KE400C-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE400C-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 1.5KE400C-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE400C-E3/54?
All 1.5KE400C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400C-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 1.5KE400C-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE400C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400C-E3/54 Tags
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