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Vishay General Semiconductor - Diodes Division 1.5KA47HE3/73
- Part No.:
- 1.5KA47HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA47HE3/73.pdf
- Description:
- TVS DIODE 38.1VWM 67.8VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
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Product details
Overview
1.5KA47HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-energy surge protection in harsh environments. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 67.8 V under 22.1 A peak pulse current, and operates up to +185 °C junction temperature - enabling robust protection of MOSFETs and sensor signal lines in automotive powertrain and body control modules.
For engineers reviewing the 1.5KA47HE3/73 datasheet, 1.5KA47HE3/73 pinout, 1.5KA47HE3/73 application, or 1.5KA47HE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, 42.3–51.7 V breakdown range, low 0.101 %/°C VBR tempco, RoHS-compliant HE3 packaging, and 1.5KA case style with matte tin-plated leads.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for stable clamping under repetitive surge stress and features unidirectional polarity only, with cathode denoted by a color band. Its 10/1000 µs waveform response supports IEC 61000-4-5 Level 4 compliance when properly implemented in PCB layout with minimized trace inductance.
Rated for 200 A non-repetitive forward surge (8.3 ms half-sine), it maintains <3.5 V forward voltage at 100 A and exhibits 38.1 V stand-off voltage (VWM) with ≤1 µA leakage at TJ = 150 °C - critical for low-power sensor interface protection without false triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains automotive load-dump transients per ISO 7637-2 without degradation |
| Breakdown Voltage (VBR) | 42.3–51.7 V at 1 mA - defines precise clamping onset for 48 V system overvoltage protection |
| Clamping Voltage (VC) | 67.8 V at 22.1 A - limits downstream IC voltage stress during 10/1000 µs surge events |
| Stand-off Voltage (VWM) | 38.1 V - ensures no conduction during normal 48 V rail operation, minimizing standby leakage |
| Operating Temperature | -65 to +185 °C - validated for under-hood automotive placement per AEC-Q101 stress testing |
| Surge Current (IPPM) | 22.1 A - maximum safe transient current before clamping threshold exceeds protected circuit limits |
| Tempco of VBR | 0.101 %/°C - enables predictable clamping shift across full automotive temperature range |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body meeting UL 94 V-0, with 0.375" (9.5 mm) lead length, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line (e.g., CAN_H, LIN, sensor supply); must be routed with low-inductance path to ground |
| Cathode | Current exit point during clamping; marked by band | Connected to system ground plane; requires low-impedance return path to handle 22.1 A surge current |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic resistance after repeated 1500 W surges - critical for long-life automotive modules |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive under-hood use including temperature cycling, HTRB, and surge lifetime testing |
| 1500 W peak pulse rating (10/1000 µs) | Meets ISO 7637-2 Pulse 5a/b requirements for 12 V/48 V systems without external heat sinking |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients - protects sensitive gate drivers and ADC inputs |
| RoHS-compliant & whisker-tested (JESD201 Class 2) | Ensures reliability in lead-free reflow assembly and prevents post-soldering intermetallic growth failures |
Applications
| Automotive Body Control Module (BCM) | 48 V Mild Hybrid Power Distribution |
|---|---|
Use Scenario: Protects microcontroller I/O and LIN bus transceivers from load-dump and inductive switching spikes in door module ECUs. IC Role / Device Role: Unidirectional TVS placed between LIN line and chassis ground, with cathode grounded. Use Value: Clamps transients to ≤67.8 V within nanoseconds, preventing latch-up or damage to 5 V tolerant transceivers while maintaining 38.1 V stand-off during normal operation. | Use Scenario: Safeguards DC-DC converter MOSFET gates and current-sense amplifiers against voltage reversal during regenerative braking surges. IC Role / Device Role: Mounted across 48 V rail and ground near power stage, absorbing >1500 W pulses without thermal runaway. Use Value: Sustains 185 °C junction temperature and 200 A surge capability - enabling compact placement near high-power switches without derating. |
| Industrial Motor Drive I/O Protection | Automotive ADAS Camera Power Input |
Use Scenario: Shields PLC digital input circuits from back-EMF spikes generated by solenoid and relay coils in factory automation panels. IC Role / Device Role: Connected between 24 V input line and common ground, with cathode tied to ground plane. Use Value: Provides 1500 W clamping with <1 ns response - faster than MOV-based solutions - preserving signal integrity on high-speed optocoupler interfaces. | Use Scenario: Guards 12 V camera module power input against jump-start transients and alternator ripple in rear-view and surround-view systems. IC Role / Device Role: Placed at connector entry point, upstream of LDO regulator, with anode to supply and cathode to ground. Use Value: Maintains ≤1 µA leakage at 150 °C - avoiding brownout risk in always-on camera applications while surviving 1000+ surge cycles per AEC-Q101. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ47A-E3/5AT | 600 W rating (10/1000 µs), SMA package, 47 V VBR min/max tighter (44.7–49.4 V) | Lower power handling; suited for consumer-grade 12 V interfaces, not automotive under-hood | Select when space-constrained PCBs require SMT mounting and surge energy is ≤600 W |
| 1.5KE47A | Same VBR range and 1500 W rating, but TO-204AA (Axial) package, non-AEC-Q101 qualified | Lacks automotive qualification and high-temp reliability; used in industrial power supplies | Choose for cost-sensitive industrial designs where AEC-Q101 and 185 °C operation are not required |
Compared with SMAJ47A-E3/5AT and 1.5KE47A, the 1.5KA47HE3/73 uniquely combines AEC-Q101 qualification, 185 °C operation, and axial 1.5KA package with proven under-hood reliability - making it the only option qualified for safety-critical automotive power distribution nodes.
Availability
1.5KA47HE3/73 is available at Aetrix Electronics and suitable for automotive body electronics, 48 V mild hybrid systems, and industrial motor drive I/O protection requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1.5KA47HE3/73 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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in automotive power networks - emphasizing thermal stability, surge endurance, and long-term parametric consistency under thermal cycling.
FAQ
What is the exact breakdown voltage range for 1.5KA47HE3/73?
The 1.5KA47HE3/73 has a specified breakdown voltage (VBR) range of 42.3 V to 51.7 V at 1 mA test current, per Vishay document 88300. This range ensures reliable clamping onset for 48 V automotive systems while accommodating process variation and temperature drift. The device's 0.101 %/°C temperature coefficient guarantees predictable VBR shift across its full -65 °C to +185 °C operating range, and all 1.5KA47HE3/73 units are tested to meet this specification before shipment.
Is 1.5KA47HE3/73 certified for automotive use?
Yes, the 1.5KA47HE3/73 carries the HE3 suffix, confirming it meets AEC-Q101 qualification requirements for automotive transient voltage suppressors. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), temperature cycling, and surge lifetime validation. The device is rated for continuous operation up to +185 °C junction temperature and is approved for under-hood applications such as body control modules and power distribution units - unlike standard industrial TVS diodes. All 1.5KA47HE3/73 units are manufactured and tested to this automotive grade.
What does the "HE3" suffix mean on 1.5KA47HE3/73?
The "HE3" suffix on 1.5KA47HE3/73 indicates RoHS-compliant, high-reliability, automotive-grade construction. It denotes compliance with JESD201 Class 2 whisker testing, matte tin-plated leads qualified per J-STD-002 and JESD22-B102, and full AEC-Q101 qualification. The HE3 variant also uses Vishay's patented PAR® structure for enhanced surge endurance. This suffix distinguishes 1.5KA47HE3/73 from non-automotive versions like 1.5KA47A and confirms its suitability for mission-critical automotive applications where long-term reliability is mandatory.
How does 1.5KA47HE3/73 compare to 1.5KA47A?
The 1.5KA47HE3/73 and 1.5KA47A share identical electrical specifications - including 42.3–51.7 V VBR, 67.8 V clamping, and 1500 W pulse rating - but differ in qualification and construction. The 1.5KA47HE3/73 is AEC-Q101 qualified, HE3-suffix high-reliability, and RoHS-compliant with JESD201 Class 2 whisker resistance. The 1.5KA47A lacks automotive qualification and is intended for industrial use. For any automotive design requiring documented reliability, the 1.5KA47HE3/73 is the validated choice.
What is the maximum clamping voltage of 1.5KA47HE3/73 under surge conditions?
The maximum clamping voltage (VC) of 1.5KA47HE3/73 is 67.8 V at 22.1 A peak pulse current (IPPM) with a 10/1000 µs waveform, as specified in Vishay document 88300. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events. The low dynamic impedance of the PAR® structure ensures minimal overshoot beyond this value, and the clamping performance remains stable across temperature and lifetime - a key requirement for protecting 75 V-rated MOSFETs and automotive-grade microcontrollers in the 1.5KA47HE3/73 application space.
1.5KA47HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA47HE3/73 FAQ
1.How can I place an order for 1.5KA47HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA47HE3/73 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 1.5KA47HE3/73 reliable?
The price and inventory of 1.5KA47HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA47HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA47HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA47HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA47HE3/73?
1.5KA47HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA47HE3/73 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 1.5KA47HE3/73?
For technical support, including 1.5KA47HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA47HE3/73 requirements.
6.How does Aetrix verify that 1.5KA47HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA47HE3/73 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 1.5KA47HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA47HE3/73?
All 1.5KA47HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA47HE3/73, 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 1.5KA47HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA47HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA47HE3/73 Tags
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