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Vishay General Semiconductor - Diodes Division 1.5KE47CA-E3/54
- Part No.:
- 1.5KE47CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47CA-E3/54.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:470
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Product details
Overview
1.5KE47CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in signal and power 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 protects MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching spikes in industrial and automotive electronics.
For engineers reviewing the 1.5KE47CA-E3/54 datasheet, 1.5KE47CA-E3/54 pinout, 1.5KE47CA-E3/54 application, or 1.5KE47CA-E3/54 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package dimensions, thermal derating curves, and direct alternatives with documented VWM, VC, and IPPM differences - all critical for ESD/surge circuit design and BOM validation.
Technical Context
This device implements an avalanche breakdown junction optimized for fast transient response (<1 ns) and low incremental clamping resistance. Its bidirectional structure enables symmetrical suppression of positive and negative voltage excursions without polarity sensitivity, making it suitable for AC-coupled or floating signal paths.
Rated for 1500 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, it sustains repetitive surges when thermally managed via lead-to-ambient thermal resistance (RθJA = 75 °C/W) and junction-to-lead resistance (RθJL = 15.4 °C/W). Standoff voltage is 40.2 V, reverse leakage ≤1.0 µA at VWM, and maximum clamping occurs at 64.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V - Ensures reliable avalanche initiation within ±5% tolerance at 1.0 mA test current |
| VWM | 40.2 V - Maximum continuous working voltage before leakage exceeds 1.0 µA; defines safe operating margin |
| VC @ IPPM | 64.8 V at 23.1 A - Clamped voltage during 1500 W transient; determines protected circuit's maximum stress level |
| PPPM | 1500 W - Peak surge energy handling per 10/1000 µs pulse; supports IEC 61000-4-5 Level 4 compliance |
| TJ range | –55 °C to +175 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom |
| IFSM | Not applicable - Bidirectional construction lacks forward surge rating; only unidirectional variants specify 200 A |
| Capacitance | Not specified in datasheet - Not characterized; unsuitable for high-speed data lines (>10 Mbps) without external validation |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 rated. Dimensions: 5.3 mm × 5.3 mm × 9.5 mm (L × W × H), lead spacing 7.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | No polarity marking; interchangeable connection - suppresses both positive and negative transients equally |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR over temperature and lifetime; reduces parameter drift vs. epoxy-passivated alternatives |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 combination wave surges up to 4 kV/2 Ω |
| Clamping ratio (VC/VBR) | 1.39 - Low ratio ensures minimal overvoltage exposure to downstream components during clamping |
| Response time | <1 ns - Faster than MOVs or GDTs; prevents transient propagation into sensitive analog/digital circuitry |
| AEC-Q101 qualification option | Available in HE3 variant (e.g., 1.5KE47CAHE3_B); not applicable to E3/54 - commercial grade only |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensors against inductive kickback from relay coils and solenoid loads. IC Role / Device Role: Bidirectional TVS placed across DC bus inputs and isolated signal lines to clamp voltage spikes to ≤64.8 V. Use Value: Prevents latch-up or permanent damage to 40 V-rated MOSFETs and op-amps operating near their absolute maximum ratings. |
Use Scenario: Shielding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients. IC Role / Device Role: Primary surge clamp on 12 V supply rail and bidirectional data lines, leveraging symmetric clamping behavior. Use Value: Maintains communication integrity during ISO 7637-2 Pulse 5a (75 V/350 ms) events without requiring additional series impedance. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Safeguarding PoE-powered Ethernet PHYs and DC-DC converters from lightning-induced surges on outdoor copper lines. IC Role / Device Role: First-stage protection on secondary-side 48 V rails, coordinated with upstream GDTs or polymer PTCs. Use Value: Limits let-through energy to <100 mJ, enabling downstream TVS arrays or silicon-based crowbar circuits to handle residual transients. |
Use Scenario: Securing microcontroller reset lines and touch-sensing electrodes against ESD and EFT events in washing machines and HVAC controllers. IC Role / Device Role: Localized clamping at board-level connectors and user interface ports, minimizing trace inductance impact. Use Value: Achieves IEC 61000-4-2 Level 4 (8 kV contact) immunity without compromising signal integrity on 3.3 V logic lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ45CA | VBR = 47.8–52.8 V; VC = 73.0 V @ 18.3 A; PPPM = 400 W; SMA package (smaller footprint, lower power) | Lower peak power limits use to sub-1 kV surge environments; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4; verify thermal dissipation in confined layouts. |
| ON Semiconductor 1.5SMC47CA | VBR = 44.7–49.4 V; VC = 76.0 V @ 19.7 A; PPPM = 1500 W; SMC package (surface-mount, higher IPPM derating above 75 °C) | Requires PCB pad thermal relief for sustained surge duty; less robust lead-to-ambient conduction than 1.5KE through-hole leads | Prefer for automated assembly where reflow compatibility and density outweigh manual soldering advantages of DO-201AD. |
Compared with 1.5KE47CA-E3/54, SMAJ45CA offers compact size but sacrifices 60% peak power handling and clamping performance, while 1.5SMC47CA matches power rating but trades off thermal reliability in high-ambient industrial enclosures due to SMC's higher RθJA.
Availability
1.5KE47CA-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer appliance control boards requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE47CA-E3/54 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-grade qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments, targeting applications where robustness, thermal stability, and repeatable clamping performance outweigh miniaturization requirements.
FAQ
What is the standoff voltage (VWM) of the 1.5KE47CA-E3/54?
The 1.5KE47CA-E3/54 has a maximum working voltage (VWM) of 40.2 V. This value represents the highest continuous DC or RMS voltage the device can withstand without exceeding 1.0 µA reverse leakage current. It provides a 10% safety margin below the minimum breakdown voltage (44.7 V), ensuring stable operation during normal system conditions while remaining fully responsive to transients exceeding VWM. The 1.5KE47CA-E3/54 must be selected so that VWM exceeds the circuit's maximum steady-state voltage.
Is the 1.5KE47CA-E3/54 suitable for automotive applications?
The 1.5KE47CA-E3/54 is a commercial-grade part (E3 suffix) and is not AEC-Q101 qualified. While its operating temperature range (–55 °C to +175 °C) meets automotive under-hood requirements, it lacks the stress testing and lot traceability mandated for automotive safety-critical systems. For qualified use, select the 1.5KE47CAHE3_B variant instead. The 1.5KE47CA-E3/54 remains appropriate for non-safety automotive subsystems like infotainment power rails or lighting control where qualification is not required.
How does the clamping voltage (VC) of the 1.5KE47CA-E3/54 compare to its breakdown voltage?
The 1.5KE47CA-E3/54 clamps at 64.8 V when subjected to its rated peak pulse current of 23.1 A (10/1000 µs waveform), resulting in a clamping ratio (VC/VBR) of approximately 1.39. This ratio reflects the device's low incremental surge resistance and indicates how much overvoltage downstream components will experience during suppression. Since VBR is specified between 44.7 V and 49.4 V, the 64.8 V clamping voltage ensures protected ICs see no more than ~30% overvoltage - a key design factor for selecting compatible 70 V-rated components.
Does the 1.5KE47CA-E3/54 have polarity markings?
No, the 1.5KE47CA-E3/54 does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional types (which feature a cathode band), the 1.5KE47CA-E3/54 uses a symmetrical junction structure and functions identically regardless of terminal orientation. This allows flexible placement in AC-coupled circuits, differential signal lines, or floating power domains without concern for installation direction - a critical advantage for protecting bidirectional buses like CAN or RS-485.
What is the thermal resistance profile of the 1.5KE47CA-E3/54?
The 1.5KE47CA-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a junction-to-lead resistance (RθJL) of 15.4 °C/W. These values indicate that heat generated during surge events dissipates primarily through the leads rather than the case, making PCB copper pour and lead length critical for thermal management. Derating begins above 25 °C ambient, with full power (1500 W) only sustainable at TA = 25 °C; at 75 °C, power must be reduced to 6.5 W continuous. The 1.5KE47CA-E3/54 relies on lead conduction, not board heatsinking.
1.5KE47CA-E3/54 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):
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE47CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47CA-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE47CA-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE47CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47CA-E3/54?
1.5KE47CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47CA-E3/54 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-E3/54?
For technical support, including 1.5KE47CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE47CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47CA-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE47CA-E3/54?
All 1.5KE47CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47CA-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE47CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47CA-E3/54 Tags
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