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Vishay General Semiconductor - Diodes Division 1.5KE47CA-E3/51
- Part No.:
- 1.5KE47CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47CA-E3/51.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,766
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Product details
Overview
1.5KE47CA-E3/51 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 47 V breakdown voltage (VBR = 44.7–49.4 V), 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. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients in automotive and industrial systems.
For engineers reviewing the 1.5KE47CA-E3/51 datasheet, 1.5KE47CA-E3/51 pinout, 1.5KE47CA-E3/51 application, or 1.5KE47CA-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and RoHS-compliant commercial-grade sourcing - all critical for surge protection design validation and BOM selection.
Technical Context
This device implements an avalanche-based silicon junction structure with glass passivation for stable, repeatable clamping under transient stress. Its bidirectional symmetry enables use without polarity consideration on AC lines or differential buses, and its low incremental surge resistance ensures minimal voltage overshoot during 10/1000 µs pulses up to 23.1 A.
It complies with JEDEC standard test conditions (ANSI/IEEE C62.35), supports 0.01% duty cycle repetitive operation, and exhibits a temperature coefficient of VBR of +0.101 %/°C - enabling predictable performance across wide ambient ranges without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V - Ensures reliable conduction onset above normal operating voltage while avoiding false triggering |
| VWM | 40.2 V - Maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 64.8 V at 23.1 A - Clamped voltage during full 1500 W transient, defining protected circuit's worst-case overvoltage |
| PPPM | 1500 W - Peak surge power handling capability per 10/1000 µs waveform, validated per Fig. 1 |
| IPPM | 23.1 A - Peak pulse current corresponding to 1500 W clamping, used for PCB trace sizing and fuse coordination |
| TJ max | +175 °C - Enables operation in under-hood automotive or high-temperature industrial enclosures without derating |
| Package | JEDEC 1.5KE - Axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 rated epoxy body |
Pinout & Package
The 1.5KE47CA-E3/51 uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. As a bidirectional TVS, it has no polarity marking; both leads are electrically symmetric and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both) | Transient conduction path | Simultaneous avalanche conduction in either direction during overvoltage events; no DC bias dependency |
| Leads (matte tin plated) | Thermal and electrical interface | Solderable per J-STD-002; supports 275 °C solder dip (10 s); RθJL = 15.4 °C/W enables effective heat transfer to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and leakage under humidity and thermal cycling per JESD22-A101 |
| 1500 W peak pulse rating (10/1000 µs) | Validated clamping performance for IEC 61000-4-5 Level 4 surge immunity compliance in industrial equipment |
| Response time ≤ 1 ns | Clamps transients before sensitive downstream components (e.g., MCU I/O, RS-485 transceivers) experience damaging overvoltage |
| RoHS-compliant E3 suffix | Meets JESD201 Class 1A whisker resistance; suitable for lead-free reflow and commercial-grade production |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation essential for safety-critical power supply and motor control applications |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator surge transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across power input prior to DC/DC converter, absorbing >100 V spikes within nanoseconds. Use Value: Limits voltage seen by downstream regulators to ≤64.8 V, preventing latch-up or gate oxide rupture in automotive-grade PMICs. | Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O (CAN, LIN) in factory automation sensors exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point, clamping fast-rising transients before reaching precision ADC or transceiver inputs. Use Value: Maintains signal integrity by limiting overshoot to <65 V while adding <0.5 pF parasitic capacitance - negligible at 1 MHz bandwidth. |
| Telecom AC/DC Adapter Input Stage | Consumer Appliance Motor Drive Protection |
Use Scenario: Secondary-side surge suppression on AC/DC adapters subjected to lightning-induced surges on mains-connected telecom equipment. IC Role / Device Role / Timing Role: Bidirectional TVS installed across rectified DC bus, clamping common-mode transients coupled via Y-capacitors or transformer leakage. Use Value: Withstands 1500 W pulses without degradation, eliminating need for redundant MOVs and reducing BOM count in compact adapter designs. | Use Scenario: Overvoltage protection for microcontroller GPIOs and gate drivers controlling BLDC motors in smart home appliances. IC Role / Device Role / Timing Role: Clamp placed between half-bridge output and controller logic, suppressing shoot-through-induced voltage spikes during commutation. Use Value: Fast 1 ns response prevents false triggering of overvoltage fault detection, enabling reliable motor stall recovery without system reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA | Lower PPPM (600 W), smaller SMB package (surface-mount), lower IPPM (33.3 A), same VBR range (42.3–46.8 V) | Preferred for space-constrained PCBs where 600 W suffices; not suitable for ISO 7637-2 Pulse 5a due to lower energy rating | Select when board area is limited and surge requirements are ≤600 W; verify thermal pad layout for SMB footprint |
| 1.5SMC47CA | Same PPPM (1500 W), SMC package (surface-mount), identical VBR/VC, higher RθJA (60 °C/W vs. 75 °C/W) | Better suited for automated assembly; requires larger thermal pad than 1.5KE but offers same clamping performance | Choose for reflow-compatible designs needing identical 1500 W protection; confirm PCB copper area meets SMC thermal requirements |
Compared with 1.5KE47CA-E3/51, SMBJ45CA trades surge robustness for compactness, while 1.5SMC47CA matches power rating but shifts to surface-mount - making the axial 1.5KE47CA-E3/51 optimal for through-hole reliability-critical applications like automotive fuses boxes or industrial terminal blocks where mechanical retention and thermal mass matter.
Availability
1.5KE47CA-E3/51 is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, telecom AC/DC adapter input stage, and consumer appliance motor drive protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE47CA-E3/51 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, power efficiency, and AEC-Q qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure modes must be mitigated without compromising long-term parametric stability.
FAQ
What is the breakdown voltage tolerance for 1.5KE47CA-E3/51?
The 1.5KE47CA-E3/51 has a specified breakdown voltage (VBR) range of 44.7 V to 49.4 V at 1.0 mA test current, representing ±10% tolerance around the nominal 47 V rating. This tight distribution ensures consistent clamping onset across production lots and supports reliable margining in protection circuit design without over-specifying downstream components.
Is 1.5KE47CA-E3/51 suitable for automotive applications?
Yes, the 1.5KE47CA-E3/51 is widely deployed in automotive subsystems including body control modules and infotainment power supplies. While the E3 suffix denotes commercial grade, its –55 °C to +175 °C operating range, 1500 W surge rating, and robust glass-passivated junction meet core requirements for non-safety-critical automotive protection - though AEC-Q101-qualified variants (e.g., 1.5KE47CAHE3_B) are required for formal qualification.
How does the bidirectional nature of 1.5KE47CA-E3/51 affect circuit placement?
The bidirectional configuration of 1.5KE47CA-E3/51 eliminates polarity concerns during placement - both leads are functionally identical, allowing direct connection across AC lines, differential buses (e.g., RS-485), or ungrounded power rails without orientation checks. This simplifies assembly and avoids field failures caused by reversed installation, unlike unidirectional TVS diodes that require strict cathode alignment.
What is the maximum clamping voltage of 1.5KE47CA-E3/51 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE47CA-E3/51 is 64.8 V at 23.1 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and must be compared directly against the absolute maximum ratings of downstream ICs to ensure survivability.
Does 1.5KE47CA-E3/51 require heatsinking in typical applications?
No active heatsink is required for 1.5KE47CA-E3/51 in single-event surge scenarios, as its 1500 W rating applies to non-repetitive pulses. However, for repetitive surges or high ambient temperatures (>75 °C), PCB copper area acting as a thermal plane is essential - the device's RθJL of 15.4 °C/W and RθJA of 75 °C/W mean ≥1 in² of 2 oz copper per lead significantly improves sustained power dissipation capability beyond the 6.5 W steady-state rating.
1.5KE47CA-E3/51 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE47CA-E3/51 FAQ
1.How can I place an order for 1.5KE47CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47CA-E3/51 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 1.5KE47CA-E3/51 reliable?
The price and inventory of 1.5KE47CA-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE47CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47CA-E3/51?
1.5KE47CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47CA-E3/51 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 1.5KE47CA-E3/51?
For technical support, including 1.5KE47CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE47CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47CA-E3/51 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 1.5KE47CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE47CA-E3/51?
All 1.5KE47CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47CA-E3/51, 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 1.5KE47CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE47CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47CA-E3/51 Tags
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