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Vishay General Semiconductor - Diodes Division 1.5KE47A-E3/73
- Part No.:
- 1.5KE47A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47A-E3/73.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,703
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Product details
Overview
1.5KE47A-E3/73 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 minimum breakdown voltage (VBR), 40.2 V maximum standoff voltage (VWM), 64.8 V clamping voltage (VC) at 23.1 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE47A-E3/73 datasheet, 1.5KE47A-E3/73 pinout, 1.5KE47A-E3/73 application, or 1.5KE47A-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under standardized surge waveforms, thermal resistance data, and direct alternative part comparisons - all confirmed against Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its clamping action limits voltage excursions during 10/1000 µs surges up to 23.1 A while maintaining a tight 44.7–49.4 V breakdown window at 1 mA test current.
Thermal design is supported by RθJL = 15.4 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient), enabling reliable operation without heatsinking at moderate ambient temperatures. The device complies with JESD 22-B106 (275 °C solder dip, 10 s) and JESD 201 Class 1A whisker testing.
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 under controlled test conditions |
| VWM | 40.2 V maximum - ensures no conduction during normal DC operation, preserving system standby current |
| VC @ IPPM | 64.8 V at 23.1 A - maximum clamped voltage seen by protected circuit during full-rated 1500 W transient |
| PPPM | 1500 W (10/1000 µs waveform) - peak surge energy handling capacity for lightning or ESD-like events |
| IFSM | 200 A (8.3 ms half-sine) - surge current tolerance for unidirectional forward conduction during fault recovery |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded, UL 94 V-0 rated housing with matte tin-plated leads |
Pinout & Package
JEDEC DO-201AD package (Case Style 1.5KE): axial-leaded, cylindrical epoxy body with cathode band marking. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102. Dimensions: 5.3 mm diameter × 9.5 mm length (0.210" × 0.375"), lead diameter 1.07 mm (0.042").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of protected line; reverse-biased during normal operation |
| Cathode (banded end) | Clamping reference node | Connected to higher-potential rail (e.g., VIN); conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external series impedance |
| Sub-nanosecond response time | Clamps transients before sensitive ICs (e.g., microcontrollers, CAN transceivers) experience damaging overvoltage |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt events, improving protection margin for 3.3 V/5 V logic interfaces |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental regulations; qualified per JESD 201 Class 1A whisker test for lead finish integrity |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and DC-DC input, absorbing >100 J surges within microseconds. Use Value: Limits voltage to ≤64.8 V during 23.1 A transients, preventing damage to upstream regulators and MCU power domains. |
Use Scenario: 4–20 mA current loop sensors in factory automation subject to cable-induced EFT bursts (IEC 61000-4-4). IC Role / Device Role / Timing Role: Bidirectional protection not applicable; unidirectional 1.5KE47A-E3/73 used on supply side of analog front-end to clamp positive-going spikes. Use Value: Maintains VWM ≤40.2 V during normal operation while clamping to 64.8 V during 10/1000 µs surges, preserving ADC accuracy and isolator integrity. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Central office power distribution feeding remote DSLAMs over long copper pairs susceptible to induced lightning. IC Role / Device Role / Timing Role: First-stage overvoltage suppressor on –48 V DC input, coordinated with downstream MOVs and fuses. Use Value: Withstands repetitive 1500 W pulses at 0.01% duty cycle, enabling robust field deployment without derating. |
Use Scenario: USB 2.0 VBUS line in portable speakers and docking stations exposed to human-body-model ESD. IC Role / Device Role / Timing Role: Secondary protection after common-mode choke; clamps fast-rising ESD events before reaching USB controller. Use Value: Sub-ns response ensures VC remains below 65 V even for 30 kV contact discharge, meeting IEC 61000-4-2 Level 4. |
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 SMAJ45A | DO-214AC (SMA) package; 45 V VWM, 70.1 V VC @ 21.4 A; 400 W rating | Lower power rating suits space-constrained consumer designs; not suitable for 1500 W load-dump scenarios | Select when board area is critical and surge energy is ≤400 W; verify thermal dissipation in SMA footprint. |
| ON Semiconductor 1.5SMC47A | DO-214AB (SMC) package; identical 44.7–49.4 V VBR, 40.2 V VWM, but 67.0 V VC @ 22.4 A | Slightly higher clamping voltage reduces protection margin for 3.3 V systems; same 1500 W rating | Acceptable drop-in replacement if layout allows SMC footprint; confirm VC margin meets system OV threshold. |
Compared with 1.5KE47A-E3/73, the SMAJ45A offers smaller size but only 400 W surge capability, while the 1.5SMC47A matches power rating but clamps 2.2 V higher - requiring verification against protected IC absolute maximum ratings.
Availability
1.5KE47A-E3/73 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply, consistent RoHS compliance, and traceable lot-level documentation.
Supply support for 1.5KE47A-E3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes demand proven 1500 W surge resilience and wide temperature operation.
FAQ
What is the breakdown voltage tolerance of the 1.5KE47A-E3/73?
The 1.5KE47A-E3/73 has a specified breakdown voltage range of 44.7 V to 49.4 V at 1 mA test current, representing ±5% tolerance around the nominal 47 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 48 V systems where overvoltage margins are constrained.
Is the 1.5KE47A-E3/73 bidirectional or unidirectional?
The 1.5KE47A-E3/73 is a unidirectional TVS diode, indicated by the "A" suffix (as opposed to "CA" for bidirectional variants). It conducts only in reverse bias during overvoltage events, with the cathode band marking the terminal connected to the higher-potential rail. This configuration is standard for DC power line protection where polarity is fixed.
What is the maximum clamping voltage of the 1.5KE47A-E3/73 under full-rated surge current?
The 1.5KE47A-E3/73 clamps to a maximum of 64.8 V at its rated peak pulse current of 23.1 A (10/1000 µs waveform), per Vishay Document #88301. This value defines the highest voltage the protected circuit will experience during a full 1500 W transient, directly informing selection of downstream ICs' absolute maximum voltage ratings.
Does the 1.5KE47A-E3/73 meet automotive qualification standards?
The base 1.5KE47A-E3/73 is commercial-grade and not AEC-Q101 qualified. However, Vishay offers the AEC-Q101 qualified variant 1.5KE47AHE3_B (with "HE3" suffix), which shares identical electrical specs but adds automotive reliability testing. For non-automotive industrial or telecom use, the E3/73 version is fully suitable and widely deployed.
What package type does the 1.5KE47A-E3/73 use, and what are its key mechanical dimensions?
The 1.5KE47A-E3/73 uses the JEDEC DO-201AD package (Case Style 1.5KE): axial-leaded, cylindrical epoxy body measuring 5.3 mm diameter × 9.5 mm length (0.210" × 0.375"), with 1.07 mm diameter matte tin-plated leads. Its UL 94 V-0 flammability rating and JESD 201 Class 1A whisker compliance ensure suitability for safety-critical and high-reliability assemblies.
1.5KE47A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE47A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47A-E3/73 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-E3/73 reliable?
The price and inventory of 1.5KE47A-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE47A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47A-E3/73?
1.5KE47A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47A-E3/73 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-E3/73?
For technical support, including 1.5KE47A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47A-E3/73 requirements.
6.How does Aetrix verify that 1.5KE47A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47A-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE47A-E3/73?
All 1.5KE47A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47A-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE47A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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