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Vishay General Semiconductor - Diodes Division 1.5KE39CAHE3/51
- Part No.:
- 1.5KE39CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39CAHE3/51.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,977
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Product details
Overview
1.5KE39CAHE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 39 V breakdown voltage (VBR = 37.1–41.0 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 53.9 V at 27.8 A, and AEC-Q101 qualification - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5KE39CAHE3/51 datasheet, 1.5KE39CAHE3/51 pinout, 1.5KE39CAHE3/51 application, or 1.5KE39CAHE3/51 equivalent, this page delivers verified electrical specs, package dimensions, clamping behavior under transient stress, thermal derating curves, and validated alternative parts for design continuity and supply resilience.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM characteristics in either direction. Its glass-passivated junction enables sub-nanosecond response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
Designed for high-energy surge immunity, it sustains 1500 W peak pulse power per JEDEC standard, with thermal resistance RθJL = 15.4 °C/W and RθJA = 75 °C/W. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - critical for automotive under-hood and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 37.1–41.0 V at 1.0 mA - defines precise voltage threshold where clamping initiates in both directions |
| Stand-off Voltage VWM | 33.3 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| Clamping Voltage VC | 53.9 V at 27.8 A (10/1000 µs) - actual voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power PPPM | 1500 W - energy-handling capacity for standardized lightning/surge waveforms without failure |
| Operating Temperature | -55 °C to +175 °C - supports under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Package | Case Style 1.5KE - axial-lead DO-201AD package with matte tin-plated leads, UL 94 V-0 molding compound |
Pinout & Package
1.5KE39CAHE3/51 uses the DO-201AD (Case Style 1.5KE) axial-leaded package: cylindrical epoxy body (10.0 mm × 5.1 mm), lead diameter 0.81 mm, lead length 9.5 mm, RoHS-compliant matte tin plating. Bi-directional construction means no polarity marking - both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional surge path | Either terminal serves as current entry point during positive or negative transients - no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5%), low leakage (<1 µA at VWM), and long-term reliability under thermal cycling |
| 1500 W peak pulse rating (10/1000 µs) | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without degradation over 1000+ events |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power rails |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream ICs - e.g., keeps microcontroller I/O below absolute max rating during surge |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature environments - essential for 15+ year automotive life |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across differential signal pair or power rail input. Use Value: Limits transient excursions to ≤53.9 V, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring surges and inductive kickback. IC Role / Device Role / Timing Role: Primary surge shunt device mounted at connector entry point, upstream of optocoupler or Schmitt trigger input stage. Use Value: Absorbs 1500 W pulses without failure, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Shielding Ethernet PHYs and RS-485 transceivers in outdoor base stations from lightning-induced common-mode transients on twisted-pair lines. IC Role / Device Role / Timing Role: Bi-directional TVS connected between line pair and ground, operating in symmetrical clamping mode. Use Value: Sub-ns response ensures clamping occurs before sensitive transceiver ICs experience destructive overvoltage. |
Use Scenario: Secondary-level surge protection on 12–48 V DC input rails of embedded power supplies and DC-DC converters. IC Role / Device Role / Timing Role: Fast-acting parallel clamp that diverts surge current away from bulk capacitors and controller ICs. Use Value: Withstands repeated 10/1000 µs surges up to 27.8 A while maintaining VWM = 33.3 V - avoids false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPPM (600 W), smaller SMB package (surface-mount), VBR = 40–44.2 V, VC = 58.1 V at 10.3 A | Preferred for space-constrained PCBs; not AEC-Q101 qualified; lower surge margin for automotive load dump | Select when board area is limited and surge requirements are ≤600 W - requires revalidation of layout parasitics and thermal relief. |
| 1.5KE39C | Same 1.5KE package and electrical specs, but commercial-grade (no AEC-Q101 or JESD 201 Class 2 qualification) | Suitable for non-automotive industrial or consumer applications where extended temperature and whisker resistance are not mandated | Choose for cost-sensitive designs outside automotive or harsh-environment use - verify lifecycle and sourcing stability separately. |
Compared with SMBJ36CA and 1.5KE39C, the 1.5KE39CAHE3/51 uniquely combines 1500 W surge capability, AEC-Q101 qualification, and axial-leaded DO-201AD robustness - making it the only option among the three qualified for under-hood automotive deployment and high-reliability industrial field wiring.
Availability
1.5KE39CAHE3/51 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O hardening, and telecom line interface surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE39CAHE3/51 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5KE family was engineered specifically for high-energy transient suppression in harsh environments - emphasizing AEC-Q101 compliance, stable clamping, and long-term parametric stability under thermal stress.
FAQ
What is the breakdown voltage range of the 1.5KE39CAHE3/51?
The 1.5KE39CAHE3/51 has a guaranteed breakdown voltage (VBR) range of 37.1 V to 41.0 V at a test current of 1.0 mA, measured in both directions due to its bi-directional construction. This tight tolerance ensures predictable clamping onset across production lots and temperature extremes from -55 °C to +175 °C. The 1.5KE39CAHE3/51 maintains this specification under JEDEC-standard test conditions and is validated per AEC-Q101 stress protocols.
Is the 1.5KE39CAHE3/51 suitable for automotive applications?
Yes - the 1.5KE39CAHE3/51 carries full AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, confirming suitability for automotive under-hood and chassis-mounted systems. Its -55 °C to +175 °C operating range, 1500 W surge rating, and DO-201AD mechanical robustness meet requirements for engine control units, ADAS sensor interfaces, and body electronics. The 1.5KE39CAHE3/51 is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the 1.5KE series.
How does the clamping voltage of the 1.5KE39CAHE3/51 compare to its breakdown voltage?
The 1.5KE39CAHE3/51 clamps at 53.9 V when subjected to its rated peak pulse current of 27.8 A (10/1000 µs waveform), yielding a clamping ratio (VC/VBR) of approximately 1.38. This low ratio reflects efficient energy absorption and minimal overvoltage stress on protected circuits - critical for safeguarding 3.3 V or 5 V logic interfaces. The 1.5KE39CAHE3/51 achieves this performance via low incremental surge resistance and optimized junction design.
What package type does the 1.5KE39CAHE3/51 use, and are leads RoHS-compliant?
The 1.5KE39CAHE3/51 uses the DO-201AD axial-leaded package (Case Style 1.5KE), with overall dimensions of 10.0 mm × 5.1 mm and 9.5 mm lead length. Its leads are matte tin-plated and fully RoHS-compliant (per EU Directive 2011/65/EU), solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 2 for whisker resistance. The 1.5KE39CAHE3/51's E3/HE3 suffix explicitly denotes this compliance and qualification level.
Can the 1.5KE39CAHE3/51 be used in bi-directional signal line protection?
Yes - the "CA" suffix in 1.5KE39CAHE3/51 denotes bi-directional functionality, meaning it provides symmetrical clamping for both positive and negative transients on the same terminals. It is routinely applied across differential pairs (e.g., RS-485, CAN), AC power inputs, and ungrounded sensor outputs. Electrical characteristics including VBR, VC, and IPPM apply identically in both directions - confirmed in Vishay's 88301 datasheet Table 1 and Fig. 9–10.
1.5KE39CAHE3/51 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE39CAHE3/51 FAQ
1.How can I place an order for 1.5KE39CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39CAHE3/51 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 1.5KE39CAHE3/51 reliable?
The price and inventory of 1.5KE39CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE39CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39CAHE3/51?
1.5KE39CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39CAHE3/51 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 1.5KE39CAHE3/51?
For technical support, including 1.5KE39CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE39CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE39CAHE3/51 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 1.5KE39CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE39CAHE3/51?
All 1.5KE39CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39CAHE3/51, 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 1.5KE39CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE39CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39CAHE3/51 Tags
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