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Vishay General Semiconductor - Diodes Division 1.5KE39HE3/54
- Part No.:
- 1.5KE39HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39HE3/54.pdf
- Description:
- TVS DIODE 31.6VWM 56.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,619
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Product details
Overview
1.5KE39HE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level overvoltage protection in power rails and signal lines. It features a 39 V breakdown voltage (VBR = 37.1–41.0 V at 1.0 mA), 33.3 V maximum working voltage (VWM), 53.9 V clamping voltage (VC) at 27.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial and automotive power systems.
For engineers reviewing the 1.5KE39HE3/54 datasheet, 1.5KE39HE3/54 pinout, 1.5KE39HE3/54 application, or 1.5KE39HE3/54 equivalent, this part delivers verified AEC-Q101 qualification, RoHS-compliant matte tin-plated leads, JESD 201 Class 2 whisker resistance, and UL 94 V-0 molded epoxy packaging - critical for high-reliability board-level surge protection design and BOM continuity planning.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector, triggering when transient voltage exceeds its 37.1–41.0 V breakdown threshold and clamping to ≤53.9 V at 27.8 A. Its glass-passivated junction enables sub-nanosecond response time (<1 ns), low incremental surge resistance, and stable performance across -55 °C to +175 °C junction temperature range.
It is rated for 1500 W peak pulse power (10/1000 µs), 6.5 W steady-state power dissipation on infinite heatsink at 75 °C, and 200 A non-repetitive forward surge current (8.3 ms half-sine). The device exhibits 0.100 %/°C temperature coefficient of VBR and 1.0 µA max reverse leakage at VWM, ensuring predictable clamping behavior under thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - defines precise conduction onset for reliable overvoltage detection |
| VWM | 33.3 V - maximum continuous operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 53.9 V at 27.8 A - clamping voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity for lightning/inductive switching events |
| TJ range | -55 °C to +175 °C - supports operation in under-hood automotive and industrial ambient environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
1.5KE39HE3/54 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; polarity must be observed in series or parallel configurations to ensure correct clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line (e.g., VIN or signal); conducts only during overvoltage |
| Cathode | Current exit point during clamping; marked with band | Connected to ground or lower-potential rail; establishes reference for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients from inductive load switching without degradation |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| RoHS-compliant, matte tin-plated leads | Ensures solderability per J-STD-002 and eliminates lead-free process compatibility risk |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability, long-life deployments (e.g., industrial PLCs) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 36 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt clamping element placed between power rail and chassis ground, responding within <1 ns to limit voltage excursion. Use Value: Clamps to 53.9 V at 27.8 A, preventing damage to 40 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation equipment exposed to ESD and relay-induced spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed on signal line to ground, absorbing fast-rising transients before reaching ADC input. Use Value: Low 1.0 µA leakage at 33.3 V ensures minimal signal offset; 53.9 V clamping protects 3.3 V/5 V interface ICs. |
| Telecom Line Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Secondary-side overvoltage suppression on 48 V PoE-powered devices subjected to induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Standoff-rated TVS on DC bus, triggered only during >37.1 V excursions to avoid false trips. Use Value: 33.3 V VWM allows safe operation across full 48 V ±10% range while maintaining margin to clamping threshold. |
Use Scenario: Input-stage transient suppression in universal-input AC/DC adapters (90–264 VAC) where bulk capacitor charging causes voltage overshoot. IC Role / Device Role / Timing Role: Primary-side unidirectional clamp across bulk cap, diverting surge energy away from bridge rectifier and controller. Use Value: 1500 W rating handles repetitive line-switching transients; 175 °C TJ(max) supports compact, thermally constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | DO-214AA package, 36 V VBR, 58.1 V VC @ 22.4 A, 600 W PPPM | Lower power rating and smaller footprint; suited for space-constrained PCBs with moderate surge exposure | Select SMBJ36A when board area is limited and peak surge energy does not exceed 600 W |
| 1.5KE39A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101) and JESD 201 Class 1A whisker rating | Lacks automotive qualification; appropriate for industrial/commercial applications where AEC-Q101 is not mandated | Choose 1.5KE39A-E3/54 for cost-sensitive, non-automotive designs requiring identical clamping performance |
Compared with 1.5KE39HE3/54, SMBJ36A offers reduced surge capacity and no AEC-Q101 validation, while 1.5KE39A-E3/54 matches all electrical parameters but omits automotive qualification and higher whisker resistance - making 1.5KE39HE3/54 the sole option for AEC-Q101–required automotive power nodes.
Availability
1.5KE39HE3/54 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1.5KE39HE3/54 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, 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 harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness against lightning, load dump, and ESD is mission-critical.
FAQ
What is the breakdown voltage tolerance of the 1.5KE39HE3/54?
The 1.5KE39HE3/54 has a specified breakdown voltage range of 37.1 V to 41.0 V at 1.0 mA test current, representing a ±5.2% tolerance about the nominal 39 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports reliable system-level overvoltage margining in designs using the 1.5KE39HE3/54.
Is the 1.5KE39HE3/54 suitable for automotive applications?
Yes, the 1.5KE39HE3/54 is AEC-Q101 qualified and explicitly listed in Vishay's documentation for automotive use. Its construction - including glass-passivated junction, UL 94 V-0 molding compound, JESD 201 Class 2 whisker resistance, and -55 °C to +175 °C operating range - meets requirements for under-hood and body electronics. The 1.5KE39HE3/54 is validated for load dump and ISO 7637-2 compliance testing.
How does the clamping voltage of the 1.5KE39HE3/54 compare to its breakdown voltage?
The 1.5KE39HE3/54 clamps to 53.9 V at its rated peak pulse current of 27.8 A (10/1000 µs waveform), which is approximately 38% above its minimum breakdown voltage of 37.1 V. This VC–VBR margin defines the worst-case overvoltage seen by downstream circuitry and confirms the 1.5KE39HE3/54's ability to protect 40 V-rated components during high-energy transients.
What is the maximum reverse leakage current for the 1.5KE39HE3/54 at rated working voltage?
At its maximum working voltage of 33.3 V and ambient temperature of 25 °C, the 1.5KE39HE3/54 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and signal integrity impact in always-on circuits, such as automotive always-live domains or sensor bias networks where the 1.5KE39HE3/54 is deployed.
Does the 1.5KE39HE3/54 require heatsinking for continuous operation?
No external heatsink is required for transient suppression duty cycles (e.g., infrequent surges), but for sustained power dissipation, thermal design must account for its 75 °C/W junction-to-ambient thermal resistance. At 6.5 W steady-state dissipation (rated PD), junction temperature rise would exceed safe limits without board-level copper thermal relief. The 1.5KE39HE3/54 is intended for pulsed, not continuous, power handling - consistent with its 1500 W peak rating and 0.01% duty cycle specification.
1.5KE39HE3/54 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):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 26.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE39HE3/54 FAQ
1.How can I place an order for 1.5KE39HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39HE3/54 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 1.5KE39HE3/54 reliable?
The price and inventory of 1.5KE39HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE39HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39HE3/54?
1.5KE39HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39HE3/54 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 1.5KE39HE3/54?
For technical support, including 1.5KE39HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39HE3/54 requirements.
6.How does Aetrix verify that 1.5KE39HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE39HE3/54 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 1.5KE39HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE39HE3/54?
All 1.5KE39HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39HE3/54, 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 1.5KE39HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE39HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39HE3/54 Tags
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