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Vishay General Semiconductor - Diodes Division 1.5KE39CAHE3_B/C
- Part No.:
- 1.5KE39CAHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39CAHE3_B/C.pdf
- Description:
- 1.5KW,39V 5%,BIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,842
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Product details
Overview
1.5KE39CAHE3_B/C 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 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 operates across –55 °C to +175 °C. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching spikes in automotive and industrial power supplies.
For engineers reviewing the 1.5KE39CAHE3_B/C datasheet, 1.5KE39CAHE3_B/C pinout, 1.5KE39CAHE3_B/C application, or 1.5KE39CAHE3_B/C equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under standardized surge waveforms, thermal resistance data, and RoHS-compliant packaging details - all confirmed from Vishay's official 88301 specification document.
Technical Context
This device implements a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating circuits without polarity constraints, and it meets UL 497B recognition for telecom and industrial protector applications.
The 1.5KE39CAHE3_B/C is rated for 1500 W peak pulse power with 10/1000 µs waveform, derated above 25 °C per Fig. 2, and supports repetitive surge duty cycles up to 0.01 %. Its thermal resistance is RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling reliable operation on PCBs with minimal heatsinking in compact power rail designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - defines precise clamping onset threshold for overvoltage detection |
| VWM | 33.3 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 53.9 V at 27.8 A - actual clamped voltage during 1500 W surge, critical for downstream component survivability |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, defining surge energy absorption limit |
| TJ range | –55 °C to +175 °C - extended junction temperature range supporting under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-lead DO-201AD package with 0.375" (9.5 mm) lead length, UL 94 V-0 compliant epoxy body |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads. No polarity marking on bidirectional variants; symmetric terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional current path | Either terminal serves as anode or cathode depending on transient polarity - no orientation required during placement |
| Lead 1 / Lead 2 | Surge current conduction path | Both leads carry full IPPM (27.8 A) during clamping; thermal path optimized to lead (RθJL = 15.4 °C/W) |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly routed and decoupled |
| AEC-Q101 qualified (HE3_B suffix) | Validated for automotive powertrain and body electronics where failure modes must meet stringent lifetime requirements |
| UL 497B recognized (QVGQ2) | Approved for use in telecom line interface protection and industrial control system surge protection modules |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure to protected ICs - e.g., keeps 3.3 V or 5 V logic rails within safe operating limits |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary shunt clamp placed directly across input terminals to divert >100 A surges away from DC/DC converters and microcontrollers. Use Value: Clamps to 53.9 V within <1 ns, limiting stress on 36 V-rated input stages and enabling compliance with OEM surge immunity requirements. |
Use Scenario: Safeguarding analog front-ends of pressure/temperature sensors connected to long cables in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across signal pair (e.g., RS-485 A/B) to suppress EFT and lightning-induced common-mode surges. Use Value: Symmetric clamping prevents signal inversion or latch-up in precision amplifiers while maintaining sub-100 ps response time. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: UL 497B-compliant protection for POTS line cards or DSLAM interfaces exposed to induced lightning surges. IC Role / Device Role / Timing Role: First-stage transient suppressor ahead of GDT or MOV, absorbing initial 10/1000 µs energy before secondary clamping. Use Value: 1500 W rating allows single-device handling of 1.2/50 µs open-circuit voltage surges up to 6 kV (per IEC 61000-4-5 coupling network). |
Use Scenario: Secondary-side overvoltage suppression on 24 V output rails of wall-mounted AC/DC adapters for smart home hubs. IC Role / Device Role / Timing Role: Final-clamp TVS parallel to bulk capacitor to prevent capacitor overvoltage during output short-circuit recovery or feedback loop failure. Use Value: 33.3 V stand-off ensures no conduction during normal regulation; 53.9 V clamping protects 36 V-rated USB-PD controllers and PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39CA | DO-214AA package (SMB), lower PPPM = 600 W, same VBR range and bidirectional topology | Surface-mount footprint; suited for space-constrained PCBs but requires careful thermal pad design for equivalent power handling | Select SMBJ39CA only if board area is limited and surge energy is ≤600 W; verify thermal relief via copper pour and via stitching. |
| 1.5KE39CAHE3_A | Same 1.5KE package and electrical specs, but earlier revision (A vs. B); lacks updated AEC-Q101 test report documentation per Doc. 88301 Rev. 09-Aug-2022 | Acceptable for commercial-grade designs; not recommended for new automotive programs requiring latest qualification evidence | Prefer 1.5KE39CAHE3_B/C for AEC-Q101 traceability; use 1.5KE39CAHE3_A only for legacy BOM continuity where revision change is not mandated. |
Compared with SMBJ39CA and 1.5KE39CAHE3_A, the 1.5KE39CAHE3_B/C delivers higher surge robustness (1500 W vs. 600 W) and documented AEC-Q101 compliance for automotive deployment, while retaining axial-leaded manufacturability and proven field reliability in high-energy industrial surge environments.
Availability
1.5KE39CAHE3_B/C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, telecom line card surge suppression, and consumer power adapter overvoltage safeguarding requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE39CAHE3_B/C 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting applications where robustness against lightning, load dump, and EFT events is non-negotiable - especially in automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage tolerance for 1.5KE39CAHE3_B/C?
The 1.5KE39CAHE3_B/C has a specified breakdown voltage range of 37.1 V to 41.0 V at 1.0 mA test current, representing a ±5 % tolerance around the nominal 39 V rating. This tight VBR window ensures predictable clamping onset and compatibility with downstream voltage thresholds in automotive and industrial control systems. The value is measured per JEDEC standard and confirmed in Vishay Document 88301, Table on page 2.
Is 1.5KE39CAHE3_B/C suitable for automotive applications?
Yes, 1.5KE39CAHE3_B/C is AEC-Q101 qualified per Vishay Document 88301 (Note 2 on page 3), covering the HE3_B revision. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements. This makes it appropriate for under-hood and chassis-mounted modules where surge immunity and long-term reliability are mandatory - such as body control units and ADAS power supplies.
How does the clamping voltage of 1.5KE39CAHE3_B/C compare to its breakdown voltage?
The 1.5KE39CAHE3_B/C clamps to 53.9 V at its rated peak pulse current of 27.8 A (10/1000 µs waveform), yielding a clamping ratio (VC/VBR) of approximately 1.42. This low ratio reflects efficient energy diversion and minimal overvoltage overshoot - critical for protecting 36 V-rated components like gate drivers and CAN transceivers without requiring additional series impedance or staged protection.
What is the thermal resistance of 1.5KE39CAHE3_B/C, and how does it affect PCB layout?
The 1.5KE39CAHE3_B/C has RθJL = 15.4 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient). For sustained surge duty, thermal performance depends heavily on lead soldering to copper pours: minimum 0.375" (9.5 mm) lead length and ≥25 mm² copper area per lead are recommended. Layout must avoid narrow traces between device and ground/power planes to maintain effective heat dissipation during repetitive transients.
Does 1.5KE39CAHE3_B/C have UL recognition, and for which standards?
Yes, 1.5KE39CAHE3_B/C carries Underwriters Laboratories recognition under file E136766 for both unidirectional and bidirectional configurations, specifically certified to UL 497B for telecommunications primary protector classification (QVGQ2). This validates its suitability in telecom line interface protection, PoE injectors, and industrial Ethernet ports where third-party safety certification is contractually required.
1.5KE39CAHE3_B/C 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:
- 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):
- 29A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- 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_B/C FAQ
1.How can I place an order for 1.5KE39CAHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39CAHE3_B/C 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_B/C reliable?
The price and inventory of 1.5KE39CAHE3_B/C 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_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE39CAHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39CAHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39CAHE3_B/C?
1.5KE39CAHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39CAHE3_B/C 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_B/C?
For technical support, including 1.5KE39CAHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39CAHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE39CAHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE39CAHE3_B/C 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_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE39CAHE3_B/C?
All 1.5KE39CAHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39CAHE3_B/C, 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_B/C part is unused and in its original packaging.
Return procedure for 1.5KE39CAHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39CAHE3_B/C Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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