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Vishay General Semiconductor - Diodes Division 1.5KE47CAHE3/51
- Part No.:
- 1.5KE47CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47CAHE3/51.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,520
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Product details
Overview
1.5KE47CAHE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 47 V breakdown voltage (VBR = 44.7–49.4 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 64.8 V at 23.1 A, and operates across –55 °C to +175 °C junction temperature. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5KE47CAHE3/51 datasheet, 1.5KE47CAHE3/51 pinout, 1.5KE47CAHE3/51 application, or 1.5KE47CAHE3/51 equivalent, this page delivers verified electrical parameters, bi-directional clamping behavior, thermal derating curves, RoHS-compliant HE3 packaging, and direct alternatives with documented differences in standoff voltage and surge current capability.
Technical Context
This bi-directional TVS diode employs a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its symmetrical I-V characteristics enable identical clamping in both polarities, eliminating polarity marking on the case.
It is rated for 1500 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient). The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) only in uni-directional variants - not applicable to 1.5KE47CAHE3/51 due to its bi-directional construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at 1 mA - defines precise voltage threshold where clamping initiates in either polarity |
| VWM | 40.2 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 64.8 V at 23.1 A - clamped voltage during full-rated 1500 W transient, critical for downstream component survivability |
| PPPM | 1500 W - peak surge energy handling capacity under standardized 10/1000 µs waveform |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments without derating loss |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body |
Pinout & Package
1.5KE47CAHE3/51 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. Bi-directional construction means no cathode/anode designation; terminals are electrically symmetrical and unmarked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both leads serve identical roles - conducts surge current bidirectionally when voltage exceeds ±44.7 V |
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 rating | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Bi-directional CA suffix | Eliminates need for polarity-aware PCB layout - simplifies placement and reduces BOM count in AC-coupled or floating systems |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics, including 1000-hour HTRB at 175 °C |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and JEDEC J-STD-002 solderability standards |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element placed across input rails upstream of DC-DC converters and LDOs. Use Value: Clamps to 64.8 V within <1 ns, limiting rail overshoot below 65 V to prevent damage to 75 V-rated input stages. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules from EFT and surge coupling. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on differential or single-ended signal lines interfacing with microcontrollers. Use Value: With <10 pF junction capacitance (typ.), preserves signal integrity up to 10 MHz while absorbing 1 kV/500 A transients. |
| Telecom Line Interface Protection | AC-DC Adapter Input Protection |
Use Scenario: Safeguarding Ethernet PHY front-ends and RS-485 transceivers against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage protector on line side of isolation transformers or common-mode chokes. Use Value: Symmetrical clamping ensures equal protection for both conductors, maintaining common-mode rejection during fast-rising transients. |
Use Scenario: Suppressing differential-mode surges entering switch-mode power supplies via AC mains input. IC Role / Device Role / Timing Role: Across-line (L–N) TVS in conjunction with MOVs and gas discharge tubes for multi-stage protection. Use Value: Fast response complements slower MOVs by clamping initial 100 ns edge, reducing let-through energy to downstream components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA | Lower PPPM (600 W), smaller SMB package (3.5 mm × 4.6 mm), VBR = 50–55.3 V, VC = 73.5 V @ 8.2 A | Preferred for space-constrained PCBs and lower-energy threats (IEC 61000-4-4); not suitable for ISO 7637-2 load dump | Select SMBJ45CA when board area is limited and peak surge current remains ≤8.2 A |
| 1.5KE47CA | Same electrical specs but commercial-grade (non-AEC-Q101), E3 suffix only (no HE3), no JESD 201 Class 2 whisker testing | Acceptable for consumer or industrial non-automotive use; lacks automotive qualification documentation and extended reliability screening | Choose 1.5KE47CA for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with 1.5KE47CAHE3/51, SMBJ45CA trades surge robustness for compactness, while 1.5KE47CA retains identical clamping performance but omits automotive qualification - making 1.5KE47CAHE3/51 the sole choice for AEC-Q101–required deployments demanding 1500 W capability and lead-finish reliability.
Availability
1.5KE47CAHE3/51 is available at Aetrix Electronics and suitable for automotive power supply protection, industrial sensor interface hardening, telecom line surge suppression, and AC-DC adapter input protection requiring stable component supply and traceable sourcing.
Supply support for 1.5KE47CAHE3/51 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, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The 1.5KE family was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising response speed or thermal stability.
FAQ
What is the breakdown voltage tolerance for 1.5KE47CAHE3/51?
The 1.5KE47CAHE3/51 has a specified breakdown voltage range of 44.7 V to 49.4 V at 1 mA test current, representing a ±5% tolerance around the nominal 47 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports reliable system-level overvoltage margining in designs using 1.5KE47CAHE3/51.
Is 1.5KE47CAHE3/51 suitable for automotive applications?
Yes, 1.5KE47CAHE3/51 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its –55 °C to +175 °C operating range, JESD 201 Class 2 whisker-resistant matte tin plating, and validation per HTRB, TCT, and ESD tests confirm suitability for powertrain, body control, and ADAS subsystems requiring 1.5KE47CAHE3/51.
How does the bi-directional design of 1.5KE47CAHE3/51 affect PCB layout?
The bi-directional nature of 1.5KE47CAHE3/51 eliminates polarity constraints - no cathode band marking exists, and either lead may connect to either side of the protected circuit. This simplifies layout, avoids orientation errors during assembly, and enables symmetric placement across AC lines or floating buses where voltage polarity reverses, such as in RS-485 or CAN FD interfaces using 1.5KE47CAHE3/51.
What is the clamping voltage of 1.5KE47CAHE3/51 under full-rated surge current?
At its full-rated peak pulse current of 23.1 A (corresponding to 1500 W with a 10/1000 µs waveform), the 1.5KE47CAHE3/51 clamps to a maximum of 64.8 V. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transients - a key parameter for verifying downstream component voltage ratings when using 1.5KE47CAHE3/51.
Does 1.5KE47CAHE3/51 require heatsinking in typical applications?
No external heatsink is required for 1.5KE47CAHE3/51 in single-event surge protection, as its 1500 W rating applies to non-repetitive pulses with ≤0.01% duty cycle. However, for repetitive surges or elevated ambient temperatures, thermal derating per Figure 2 in the Vishay datasheet (Document 88301) must be applied - the device's RθJL of 15.4 °C/W allows effective self-cooling through PCB copper when leads are soldered to ≥1 cm² of 2 oz copper.
1.5KE47CAHE3/51 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- 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
1.5KE47CAHE3/51 FAQ
1.How can I place an order for 1.5KE47CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47CAHE3/51 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 1.5KE47CAHE3/51 reliable?
The price and inventory of 1.5KE47CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE47CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47CAHE3/51?
1.5KE47CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47CAHE3/51 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 1.5KE47CAHE3/51?
For technical support, including 1.5KE47CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE47CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47CAHE3/51 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 1.5KE47CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE47CAHE3/51?
All 1.5KE47CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47CAHE3/51, 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 1.5KE47CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE47CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47CAHE3/51 Tags
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