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Vishay General Semiconductor - Diodes Division 1.5KE47-E3/73
- Part No.:
- 1.5KE47-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47-E3/73.pdf
- Description:
- TVS DIODE 38.1VWM 67.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,128
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Product details
Overview
1.5KE47-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 with 10/1000 µs waveform, and operates across -55 °C to +175 °C junction temperature range - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE47-E3/73 datasheet, 1.5KE47-E3/73 pinout, 1.5KE47-E3/73 application, or 1.5KE47-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal resistance data, and direct alternatives for ESD/lightning transient suppression in 24 V and 48 V systems.
Technical Context
The 1.5KE47-E3/73 employs a glass passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V forward voltage at 100 A, with 1.0 mA test current defining breakdown threshold per ANSI/IEEE C62.35.
It delivers 1500 W peak pulse power handling at 25 °C ambient, derated linearly above TA = 25 °C with 75 °C/W junction-to-ambient thermal resistance. The device supports repetitive surge events at ≤0.01% duty cycle and complies with JESD 22-B106 solderability (275 °C, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V - defines reliable conduction onset under surge; ensures clamping begins before downstream IC damage thresholds. |
| VWM | 40.2 V - maximum continuous reverse operating voltage; sets safe DC rail margin for 48 V nominal systems. |
| VC @ IPPM | 64.8 V at 23.1 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - peak pulse power rating; enables robust protection against lightning-induced transients (IEC 61000-4-5 Level 3). |
| IFSM | 200 A - non-repetitive forward surge current (8.3 ms half-sine); supports high-energy inductive switch-off events. |
| TJ max | +175 °C - maximum junction temperature; allows operation in under-hood automotive or enclosed industrial enclosures. |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial leaded, molded epoxy body meeting UL 94 V-0. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. E3 suffix indicates RoHS-compliant commercial grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to ground or lower-potential node in unidirectional configuration; carries full surge current during clamping. |
| Cathode | Reverse-biased terminal / high-side connection | Marked with color band; connects to protected line (e.g., 48 V rail); blocks normal operation but avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| 1500 W peak pulse power (10/1000 µs) | Provides immunity to high-energy transients common in 24–48 V industrial and automotive power distribution networks. |
| Clamping voltage ≤64.8 V at 23.1 A | Limits voltage seen by downstream MOSFETs or controllers during ISO 7637-2 Pulse 1/2b events. |
| Response time <1 ns | Engages before sensitive logic or analog circuitry sustains damage from fast-rising ESD or switching spikes. |
| AEC-Q101 qualified variants available | Supports automotive-grade designs when specified with HE3 suffix (e.g., 1.5KE47AHE3_B), though 1.5KE47-E3/73 is commercial grade. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator overshoot per ISO 7637-2. IC Role / Device Role: Primary shunt clamp on main power rail, placed upstream of DC-DC converters and microcontrollers. Use Value: Clamps transients to ≤64.8 V while absorbing up to 1500 W, preventing latch-up or gate oxide rupture in downstream FETs and PMICs. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) in PLC I/O modules exposed to field wiring surges. IC Role / Device Role: Unidirectional TVS placed between signal line and ground, with series current-limiting resistor. Use Value: Limits induced voltage to <65 V during 1 kV/500 A lightning surge (IEC 61000-4-5), preserving ADC reference integrity and op-amp input stages. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Overvoltage protection on -48 V telecom rectifier outputs feeding base station backplanes. IC Role / Device Role: Standoff-rated TVS on negative rail, leveraging unidirectional polarity for reverse-polarity fault tolerance. Use Value: Withstands 40.2 V continuous reverse bias and clamps to 64.8 V during 10/1000 µs surges, ensuring uninterrupted operation during grid coupling events. | Use Scenario: Input stage protection for BLDC motor drivers in smart HVAC systems subjected to inductive kickback. IC Role / Device Role: Clamp across H-bridge supply rail, referenced to ground, absorbing energy from flyback diodes and parasitic inductance. Use Value: Handles 200 A non-repetitive forward surge (8.3 ms), enabling robust protection without sacrificial fuse coordination. |
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 V VC @ 17.1 A; 400 W PPPM. | Lower power rating suits space-constrained PCBs where 1500 W capability is excessive. | Select when board area is critical and surge energy is limited to IEC 61000-4-2/4-4 levels. |
| ON Semiconductor 1.5SMC47A | SMB package; identical 44.7–49.4 V VBR, 40.2 V VWM, but 65.8 V VC @ 22.8 A; same 1500 W rating. | Surface-mount alternative with comparable clamping performance and thermal profile. | Choose for automated assembly and higher-density layouts where through-hole mounting is impractical. |
Compared with 1.5KE47-E3/73, SMAJ45A offers smaller footprint but reduced surge capacity, while 1.5SMC47A matches power and clamping specs in an SMD package - enabling layout flexibility without compromising protection level in 48 V systems.
Availability
1.5KE47-E3/73 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed protection requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1.5KE47-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, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting 24 V and 48 V systems in automotive, industrial control, and telecommunications infrastructure where robustness and repeatable clamping are mandatory.
FAQ
What is the breakdown voltage range for the 1.5KE47-E3/73?
The 1.5KE47-E3/73 has a guaranteed breakdown voltage (VBR) range of 44.7 V to 49.4 V at 1.0 mA test current, per the Vishay 88301 datasheet. This range ensures consistent avalanche initiation across production lots and supports design margining for 48 V system protection. The 1.5KE47-E3/73 must be biased below its 40.2 V standoff voltage (VWM) during normal operation to avoid leakage-related power loss.
Does the 1.5KE47-E3/73 meet automotive qualification standards?
The 1.5KE47-E3/73 is a commercial-grade part with RoHS compliance (E3 suffix) and is not AEC-Q101 qualified. However, Vishay offers the functionally identical 1.5KE47AHE3_B variant - which shares the same electrical specs and DO-201AD package - explicitly qualified to AEC-Q101 for automotive use. Engineers requiring automotive qualification must specify the HE3 suffix version, not the 1.5KE47-E3/73.
What is the clamping voltage of the 1.5KE47-E3/73 under surge conditions?
The 1.5KE47-E3/73 clamps to a maximum of 64.8 V at its rated peak pulse current of 23.1 A, measured using the standard 10/1000 µs waveform. This clamping voltage directly determines the maximum stress imposed on downstream components during transient events. The 1.5KE47-E3/73 achieves this with low incremental surge resistance, ensuring predictable voltage limiting even at high current levels.
Can the 1.5KE47-E3/73 be used in bidirectional configurations?
No - the 1.5KE47-E3/73 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants require the "CA" suffix (e.g., 1.5KE47CA), which are symmetrically rated for both polarities. Using the 1.5KE47-E3/73 in bidirectional applications would result in forward conduction during negative transients, causing failure. Always verify polarity designation before placement.
What is the thermal resistance of the 1.5KE47-E3/73, and how does it affect layout?
The 1.5KE47-E3/73 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W under standard JEDEC test conditions. This value guides copper pour sizing and trace width design: for repeated surges, minimizing thermal impedance via wide ground planes and short leads is essential. The 1.5KE47-E3/73 also exhibits 15.4 °C/W junction-to-lead resistance, making lead length and solder joint quality critical for heat dissipation during high-duty-cycle events.
1.5KE47-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 38.1V
- Voltage - Breakdown (Min):
- 42.3V
- Voltage - Clamping (Max) @ Ipp:
- 67.8V
- Current - Peak Pulse (10/1000µs):
- 22.1A
- 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
1.5KE47-E3/73 FAQ
1.How can I place an order for 1.5KE47-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47-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 1.5KE47-E3/73 reliable?
The price and inventory of 1.5KE47-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 1.5KE47-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE47-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47-E3/73?
1.5KE47-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47-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 1.5KE47-E3/73?
For technical support, including 1.5KE47-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47-E3/73 requirements.
6.How does Aetrix verify that 1.5KE47-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47-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 1.5KE47-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE47-E3/73?
All 1.5KE47-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47-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 1.5KE47-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE47-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47-E3/73 Tags
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