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Vishay General Semiconductor - Diodes Division 1.5KE47A-E3/54
- Part No.:
- 1.5KE47A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47A-E3/54.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,577
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Product details
Overview
1.5KE47A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 44.7 V to 49.4 V breakdown voltage (VBR) at 1 mA, 40.2 V maximum standoff voltage (VWM), 64.8 V clamping voltage (VC) at 23.1 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE47A-E3/54 datasheet, 1.5KE47A-E3/54 pinout, 1.5KE47A-E3/54 application, or 1.5KE47A-E3/54 equivalent, this part delivers verified clamping performance, RoHS-compliant matte tin-plated leads, JEDEC-standard 1.5KE package, and AEC-Q101 qualification eligibility (via HE3 suffix variants), supporting design-in for industrial power supplies, automotive body electronics, and telecom line protection where fast response (<1 ns), low incremental surge resistance, and stable thermal derating are critical.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction, diverting surge current away from downstream components. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and repeatable breakdown behavior across temperature (-55 °C to +175 °C).
Clamping action responds within <1 ns, limiting voltage to ≤64.8 V at 23.1 A (10/1000 µs), while thermal resistance (RθJL = 15.4 °C/W) enables reliable power dissipation under repetitive surge conditions. The device complies with UL 497B (QVGQ2 recognition) and meets JESD 22-B106 solderability standards (275 °C, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 44.7 V min / 49.4 V max at 1 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| Standoff Voltage VWM | 40.2 V max - ensures no conduction during normal 36–40 V DC rail operation, minimizing leakage |
| Clamping Voltage VC | 64.8 V at 23.1 A (10/1000 µs) - limits protected circuit voltage to safe level during surge events |
| Peak Pulse Power PPPM | 1500 W - sustains high-energy transients (e.g., ISO 7637-2 Pulse 5a) without failure |
| Maximum Leakage ID | 1.0 µA at VWM - prevents parasitic loading on low-power sensor or logic circuits |
| Junction Temperature Range | -55 °C to +175 °C - supports operation in under-hood automotive and industrial environments |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - industry-standard axial leaded package with 0.375" lead length, UL 94 V-0 molding |
Pinout & Package
1.5KE47A-E3/54 uses a 2-terminal axial-leaded DO-201AD package (Case Style 1.5KE). The cathode is marked by a color band on the body; polarity must be observed in series connection with DC rails.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line (e.g., +12 V rail); conducts surge current to ground when V > VBR |
| Cathode | Current exit point during clamping; marked with band | Connected to system ground or low-impedance return path; establishes unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients such as load dump (ISO 16750-2) and EFT bursts without degradation |
| Clamping response time <1 ns | Protects fast-switching MOSFET gates and microcontroller I/O before damage occurs |
| RoHS-compliant matte tin plating | Guarantees solderability per J-STD-002/JESD 22-B102 and eliminates whisker risk (JESD 201 Class 1A) |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial surge protection systems requiring safety certification |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges above 40 V. Use Value: Limits rail voltage to ≤64.8 V during 1500 W pulses, preventing gate oxide rupture in power MOSFETs and brownout in MCU regulators. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC inputs against ESD and field wiring surges. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS mounted at connector entry to suppress ±2 kV contact ESD (IEC 61000-4-2) and inductive kickback. Use Value: Maintains signal integrity with no DC loading; clamps transients within 1 ns to preserve sub-millisecond timing accuracy of sensor sampling. |
| Telecom Line Surge Protection | DC-DC Converter Input Protection |
Use Scenario: Front-end protection of PoE-powered equipment (e.g., IP cameras) against lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on each data line referenced to common-mode ground, compliant with UL 497B. Use Value: Withstands 10/1000 µs surges up to 1500 W while maintaining <1 µA leakage - avoids false triggering of PD detection circuitry. |
Use Scenario: Input-side protection of isolated DC-DC modules (e.g., 48 V to 5 V) against back EMF from relay coils and motor drivers. IC Role / Device Role / Timing Role: Clamping device placed upstream of input filter capacitor to absorb energy before reaching primary-side FETs. Use Value: 64.8 V clamping ensures input stage remains below 70 V absolute maximum rating, extending converter lifetime under repeated switching stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A | DO-214AA package (SMB), 45 V VWM, 70 V VC at 17.1 A, 600 W PPPM | Lower power rating and smaller footprint; suited for space-constrained PCBs but not direct replacement for 1500 W requirements | Select SMBJ45A only when surge energy is ≤600 W and board area is limited; verify thermal margin with RθJA = 110 °C/W |
| 1.5KE47CA | Bidirectional variant, same VBR range (44.7–49.4 V), identical 1500 W rating and DO-201AD package | Supports AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs | Choose 1.5KE47CA for bidirectional protection needs; note absence of polarity marking and higher VC symmetry |
Compared with 1.5KE47A-E3/54, SMBJ45A offers compact size but sacrifices 60% peak power handling and thermal robustness, while 1.5KE47CA retains full 1500 W capability but removes polarity dependence - making it suitable only where bidirectional clamping is required and DC bias is absent.
Availability
1.5KE47A-E3/54 is available at Aetrix Electronics and suitable for automotive ECU power conditioning, industrial sensor interface hardening, and telecom line surge protection requiring stable component supply, consistent lot-to-lot parametric performance, and long-term manufacturing continuity.
Supply support for 1.5KE47A-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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where sustained 1500 W surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE47A-E3/54?
The 1.5KE47A-E3/54 has a specified breakdown voltage (VBR) range of 44.7 V minimum to 49.4 V maximum at 1 mA test current, per Vishay Document Number 88301. This ±5% tolerance ensures consistent clamping onset across production lots and supports robust design margins for 40 V nominal systems.
Does 1.5KE47A-E3/54 meet automotive qualification standards?
The base 1.5KE47A-E3/54 is commercial-grade; however, the AEC-Q101-qualified variant is designated as 1.5KE47AHE3_B (with "B" revision code). That version undergoes stress testing per AEC-Q101 including HTGB, HTRB, and temperature cycling - confirming suitability for automotive under-hood applications.
What is the maximum clamping voltage of 1.5KE47A-E3/54 at rated surge current?
At its rated peak pulse current of 23.1 A (10/1000 µs waveform), the 1.5KE47A-E3/54 clamps to a maximum of 64.8 V. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can 1.5KE47A-E3/54 be used in bidirectional signal protection?
No - 1.5KE47A-E3/54 is unidirectional only, with cathode marked by a band. For bidirectional protection (e.g., AC lines or differential buses), use the 1.5KE47CA variant, which provides symmetrical clamping in both polarities and omits the polarity marking.
What packaging format is supplied for 1.5KE47A-E3/54?
The 1.5KE47A-E3/54 is supplied in 13" diameter paper tape and reel packaging, with a base quantity of 1400 units per reel and unit weight of 0.968 g. The "/54" suffix denotes the preferred package code per Vishay's ordering nomenclature.
1.5KE47A-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:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE47A-E3/54 FAQ
1.How can I place an order for 1.5KE47A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47A-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 1.5KE47A-E3/54 reliable?
The price and inventory of 1.5KE47A-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 1.5KE47A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE47A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47A-E3/54?
1.5KE47A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47A-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 1.5KE47A-E3/54?
For technical support, including 1.5KE47A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE47A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47A-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 1.5KE47A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE47A-E3/54?
All 1.5KE47A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47A-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 1.5KE47A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE47A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47A-E3/54 Tags
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