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Vishay General Semiconductor - Diodes Division 1.5KE39CAHE3_A/D
- Part No.:
- 1.5KE39CAHE3_A/D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39CAHE3_A/D.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,270
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Product details
Overview
1.5KE39CAHE3_A/D from Vishay General Semiconductor is a bidirectional 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 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 53.9 V at 27.8 A, and operates across –55 °C to +175 °C. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges in automotive and industrial systems.
For engineers reviewing the 1.5KE39CAHE3_A/D datasheet, 1.5KE39CAHE3_A/D pinout, 1.5KE39CAHE3_A/D application, or 1.5KE39CAHE3_A/D equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), JEDEC 1.5KE package dimensions, and real-world clamping behavior under standardized surge waveforms.
Technical Context
This bidirectional TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its symmetrical I-V characteristic enables identical clamping in both polarities, with no polarity marking on the case - distinguishing it from unidirectional variants like 1.5KE39A.
The device complies with UL 497B (QVGQ2 recognition) and meets JESD 201 Class 2 whisker resistance (HE3 suffix). It is rated for 1500 W peak pulse power at 10/1000 µs, derated linearly above 25 °C ambient per Fig. 2, and supports repetitive surge duty cycles up to 0.01 %.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - defines precise voltage threshold where clamping initiates reliably |
| VWM | 33.3 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 53.9 V at 27.8 A - clamped voltage during full 1500 W transient, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity without failure |
| TJ max. | +175 °C - enables operation in under-hood automotive or high-temperature industrial environments |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance supports high-reliability mounting on PCB copper |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: JEDEC-standard 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Reversible current path | No polarity marking; terminals are functionally identical - connects across protected line and ground without orientation constraint |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term leakage stability under humidity and thermal stress |
| 1500 W peak pulse rating | Withstands IEEE C62.41-compliant surge events (e.g., 6 kV/3 kA) without degradation when properly mounted |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic rails |
| UL 497B recognized (QVGQ2) | Meets telecom and industrial safety standards for primary-side surge protection without additional certification burden |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between power rail and chassis ground. Use Value: Clamps transients to ≤53.9 V within <1 ns, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Shielding 4–20 mA or RS-485 sensor nodes from ESD and field-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on differential signal pair and supply lines. Use Value: Maintains signal integrity by limiting common-mode voltage excursion to safe levels while preserving low capacitance (<100 pF). |
| Telecom DSL Line Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding ADSL/VDSL line cards against lightning surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Primary-stage TVS on tip/ring lines upstream of hybrid transformer and receiver IC. Use Value: Absorbs >1500 W surge energy per line while meeting ITU-T K.20/21 immunity requirements. |
Use Scenario: Suppressing flyback spikes from brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Across motor terminals to clamp inductive kickback during PWM switching. Use Value: Prevents MOSFET avalanche failure and reduces conducted EMI by limiting VDS overshoot to 53.9 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPPM (600 W), smaller SMB package (IPPM = 17.4 A @ 36 V), higher VC/VBR ratio (1.47) | Better suited for space-constrained consumer PCBs; insufficient for automotive load dump per ISO 16750-2 | Select when board area is critical and surge energy is ≤600 W; verify layout thermal relief for SMB footprint. |
| 1.5KE36CAHE3_A/D | 36 V VBR (34.2–37.8 V), lower clamping voltage (49.9 V), same 1500 W rating and 1.5KE package | Preferred for 24 V nominal systems requiring tighter clamping margin below 50 V | Choose for 24 V industrial controls where 36 V standoff avoids false triggering during normal transients. |
Compared with SMBJ36CA, the 1.5KE39CAHE3_A/D delivers 2.5× higher surge power handling and superior thermal robustness in high-current applications; versus 1.5KE36CAHE3_A/D, it provides higher standoff for 36 V systems while maintaining identical mechanical and thermal interface compatibility.
Availability
1.5KE39CAHE3_A/D is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and appliance motor drives requiring stable component supply with AEC-Q101 assurance and UL recognition.
Supply support for 1.5KE39CAHE3_A/D 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance.
The 1.5KE series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parameter stability are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE39CAHE3_A/D?
The 1.5KE39CAHE3_A/D has a specified breakdown voltage range of 37.1 V to 41.0 V at 1 mA test current, representing a ±5 % tolerance around the nominal 39 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports reliable design margining in 36 V system protection schemes.
Is 1.5KE39CAHE3_A/D qualified for automotive use?
Yes, the 1.5KE39CAHE3_A/D carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay's documentation (Document 88301, Note 2). It has passed stress tests including temperature cycling, high-temperature reverse bias, and accelerated life testing required for under-hood and chassis-mounted automotive electronics.
How does the clamping voltage of 1.5KE39CAHE3_A/D compare to its breakdown voltage?
The 1.5KE39CAHE3_A/D clamps to 53.9 V at its rated peak pulse current of 27.8 A, yielding a clamping ratio (VC/VBR) of approximately 1.38. This low ratio reflects efficient energy absorption and minimal overvoltage stress on downstream components - critical for protecting 3.3 V or 5 V logic interfaces.
What is the thermal resistance from junction to lead for 1.5KE39CAHE3_A/D?
The 1.5KE39CAHE3_A/D has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, measured with 0.375" (9.5 mm) lead length. This value enables effective heat transfer to PCB copper pours or heatsinks, supporting reliable operation at elevated ambient temperatures up to +125 °C with appropriate board layout.
Does 1.5KE39CAHE3_A/D have UL recognition?
Yes, the 1.5KE39CAHE3_A/D is UL recognized under file E136766 for both unidirectional and bidirectional configurations, complying with UL 497B for signal and power line protectors. This recognition covers its use in telecom, industrial, and building automation equipment without requiring end-product retesting.
1.5KE39CAHE3_A/D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- 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_A/D FAQ
1.How can I place an order for 1.5KE39CAHE3_A/D through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39CAHE3_A/D 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_A/D reliable?
The price and inventory of 1.5KE39CAHE3_A/D 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_A/D is usually 5 days.
3.What payment methods are accepted for 1.5KE39CAHE3_A/D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39CAHE3_A/D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39CAHE3_A/D?
1.5KE39CAHE3_A/D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39CAHE3_A/D 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_A/D?
For technical support, including 1.5KE39CAHE3_A/D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39CAHE3_A/D requirements.
6.How does Aetrix verify that 1.5KE39CAHE3_A/D is sourced from the original manufacturer or authorized distributors?
All 1.5KE39CAHE3_A/D 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_A/D meets industry standards.
7.What is the process for return or replacement of 1.5KE39CAHE3_A/D?
All 1.5KE39CAHE3_A/D units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39CAHE3_A/D, 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_A/D part is unused and in its original packaging.
Return procedure for 1.5KE39CAHE3_A/D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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