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Vishay General Semiconductor - Diodes Division 1.5KE39AHE3/51
- Part No.:
- 1.5KE39AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39AHE3/51.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,085
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Product details
Overview
1.5KE39AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC 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, 1500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1.5KE39AHE3/51 datasheet, 1.5KE39AHE3/51 pinout, 1.5KE39AHE3/51 application, or 1.5KE39AHE3/51 equivalent, this part is selected for robust surge immunity in automotive ECUs, industrial I/O interfaces, and telecom power supply inputs where fast clamping (<1 ns), low leakage (<1 µA at VWM), and high surge current handling are critical.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve stable, repeatable avalanche breakdown with low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.4). Its unidirectional polarity enables integration into DC-biased circuits without reverse conduction concerns.
Designed for transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump), it operates across –55 °C to +175 °C junction temperature and maintains performance under repetitive 10/1000 µs surges at 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 37.1–41.0 V at 1.0 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| Working Peak Reverse Voltage VWM | 33.3 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1 µA |
| Clamping Voltage VC | 53.9 V at 27.8 A (10/1000 µs) - limits transient voltage seen by protected ICs to safe levels |
| Peak Pulse Power PPPM | 1500 W - sustains single 1 ms transients up to 27.8 A without failure |
| Maximum Leakage Current ID | <1.0 µA at 33.3 V - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| Junction Temperature Range | –55 °C to +175 °C - supports under-hood automotive and industrial environments without derating |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
Pinout & Package
Package: Axial-leaded DO-201AD (Case Style 1.5KE), epoxy-molded body with matte tin-plated leads; RoHS-compliant and JESD201 Class 2 whisker-tested (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to ground or lower-potential node in uni-directional clamp configuration |
| Cathode | Avalanche conduction terminal / high-side connection | Marked with color band; connected to protected line (e.g., 24 V rail or CAN_H) |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5%), long-term reliability, and resistance to humidity-induced degradation |
| 1500 W peak pulse power (10/1000 µs) | Handles severe load-dump transients in 12 V/24 V automotive systems without thermal runaway |
| Response time <1 ns | Clamps before sensitive downstream components (e.g., microcontrollers, transceivers) experience damaging overvoltage |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use including temperature cycling, high-temperature operating life, and mechanical shock |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during surge events, reducing stress on protected MOSFETs and regulators |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V power input and LIN bus lines against ISO 7637-2 Pulse 1, 2a, and 5a transients during vehicle cranking and load dump. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector entry point before LDOs and microcontroller power domains. Use Value: Limits transient voltage to ≤53.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies. |
Use Scenario: Shields 24 V digital input optocoupler circuitry from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Fast-acting shunt protector mounted adjacent to terminal block to divert surge energy before reaching isolation barrier. Use Value: Withstands 27.8 A surge current while maintaining <1 µA leakage at 24 V nominal, preserving input threshold accuracy. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Drive Board |
Use Scenario: Guards AC/DC adapter output stage against lightning-induced surges on PoE-powered equipment or DSL line interfaces. IC Role / Device Role / Timing Role: Secondary-level TVS placed after bulk filter capacitors to suppress residual transients escaping upstream MOVs. Use Value: 1500 W rating absorbs multi-kV impulses without degradation; UL 497B recognition supports safety certification. |
Use Scenario: Safeguards MCU GPIOs and H-bridge gate drivers from back-EMF spikes generated by brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Localized clamp on motor driver power rail and control signal traces near motor connector. Use Value: Sub-1 ns response prevents false triggering or shoot-through in half-bridge FETs during rapid motor commutation. |
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 | Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), VBR = 40–44.2 V, VC = 58.1 V @ 10.3 A | Preferred for space-constrained PCBs; less suitable for high-energy load dump | Select when board area is limited and surge energy is ≤600 W (e.g., consumer USB ports) |
| 1.5KE39CA | Bi-directional variant (same VBR, VWM, VC); no polarity marking; symmetric clamping for AC or bidirectional signals | Required for differential buses (e.g., RS-485, CAN) or AC-coupled analog lines | Choose only if protecting non-DC-biased signals; not interchangeable without circuit redesign |
Compared with SMBJ36A and 1.5KE39CA, the 1.5KE39AHE3/51 delivers higher surge energy handling (1500 W vs. 600 W) and automotive qualification (AEC-Q101), making it optimal for high-reliability 12 V/24 V systems where physical size permits DO-201AD mounting.
Availability
1.5KE39AHE3/51 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, long lifecycle support, and AEC-Q101 compliance.
Supply support for 1.5KE39AHE3/51 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments-particularly automotive, industrial, and telecom infrastructure-where consistent clamping performance and long-term stability under thermal stress are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE39AHE3/51?
The 1.5KE39AHE3/51 has a specified breakdown voltage range of 37.1 V to 41.0 V at 1.0 mA test current, representing a ±5% tolerance about the nominal 39 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable design margining in safety-critical applications like automotive power distribution.
Is 1.5KE39AHE3/51 suitable for protecting CAN bus lines?
No-1.5KE39AHE3/51 is a uni-directional TVS diode and must be used with proper DC biasing; it is not appropriate for differential, AC-coupled, or bidirectional signal lines like CAN. For CAN bus protection, the bi-directional 1.5KE39CA or dedicated CAN-optimized TVS arrays (e.g., SMA6J33CA) are required to clamp both polarities symmetrically without disrupting common-mode signaling.
Does 1.5KE39AHE3/51 require a heatsink for 1500 W pulse handling?
No external heatsink is needed for single 10/1000 µs pulses-the 1500 W rating is defined under transient conditions where thermal mass dominates. However, for repetitive surges or sustained power dissipation, the device's RθJA = 75 °C/W and RθJL = 15.4 °C/W mean that PCB copper area and lead length significantly impact steady-state thermal performance; layout guidelines in Vishay's AN934 should be followed for high-duty-cycle use.
How does the HE3 suffix affect the 1.5KE39AHE3/51 specification?
The HE3 suffix on 1.5KE39AHE3/51 indicates RoHS compliance plus AEC-Q101 qualification and JESD201 Class 2 whisker resistance. It confirms the device meets automotive reliability standards-including high-temperature operating life, temperature cycling, and mechanical shock-making it suitable for under-hood and chassis-mounted applications where standard commercial-grade 1.5KE39AE3 would not be approved.
What is the maximum leakage current of 1.5KE39AHE3/51 at its rated working voltage?
At its maximum working voltage of 33.3 V and ambient temperature of 25 °C, the 1.5KE39AHE3/51 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes quiescent power loss in battery-operated systems, supporting designs compliant with stringent energy-efficiency standards.
1.5KE39AHE3/51 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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
1.5KE39AHE3/51 FAQ
1.How can I place an order for 1.5KE39AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39AHE3/51 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 1.5KE39AHE3/51 reliable?
The price and inventory of 1.5KE39AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE39AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39AHE3/51?
1.5KE39AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39AHE3/51 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 1.5KE39AHE3/51?
For technical support, including 1.5KE39AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE39AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE39AHE3/51 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 1.5KE39AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE39AHE3/51?
All 1.5KE39AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39AHE3/51, 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 1.5KE39AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE39AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39AHE3/51 Tags
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