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Vishay General Semiconductor - Diodes Division 1.5KA47HE3/51
- Part No.:
- 1.5KA47HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA47HE3/51.pdf
- Description:
- TVS DIODE 38.1VWM 67.8VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:5,115
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Product details
Overview
1.5KA47HE3/51 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 - ideal for protecting automotive sensor signal lines and MOSFET gates against load-switching transients.
For engineers reviewing the 1.5KA47HE3/51 datasheet, 1.5KA47HE3/51 pinout, 1.5KA47HE3/51 application, or 1.5KA47HE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 42.3–51.7 V breakdown range, low 0.101 %/°C VBR tempco, and RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for stable clamping under repetitive surge stress and high-temperature operation. Its unidirectional polarity enables precise reverse-biased overvoltage clamping on DC power rails and signal paths, with fast response time and low incremental surge resistance ensuring minimal let-through voltage during transient events.
The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and maintains reliable performance across -65 °C to +185 °C junction temperature range. Its 38.1 V stand-off voltage and 1.0 µA max leakage at VWM support robust immunity against false triggering in 36 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients without failure in automotive load-dump or ISO 7637-2 pulse 5a scenarios |
| Breakdown Voltage VBR | 42.3–51.7 V at 1.0 mA - defines precise clamping onset threshold for 36 V nominal systems |
| Clamping Voltage VC | 67.8 V at 22.1 A - limits maximum let-through voltage during surge, protecting downstream ICs |
| Stand-off Voltage VWM | 38.1 V - ensures no conduction during normal 36 V system operation, minimizing standby leakage |
| Junction Temperature Range | -65 °C to +185 °C - supports under-hood placement and AEC-Q101 automotive reliability requirements |
| Surge Current IPPM | 22.1 A (10/1000 µs) - quantifies maximum transient current it can safely shunt to ground |
| Tempco of VBR | 0.101 %/°C - ensures predictable voltage shift over temperature, critical for margin-critical designs |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with matte tin-plated leads; UL 94 V-0 rated; lead length 9.5 mm; diameter 4.8–5.3 mm; RoHS-compliant HE3 suffix meets JESD201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to system ground or low-voltage reference; forms cathode-to-rail clamping path |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., sensor supply or CAN bus); conducts only during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across 1000+ surge cycles at elevated temperature |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, HTRB, and surge lifetime testing |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) energy requirements for 12 V/24 V/36 V vehicle architectures |
| Low 0.101 %/°C VBR tempco | Minimizes design margin loss over -40 °C to +125 °C ambient, enabling tighter clamping margins |
| RoHS-compliant HE3 packaging | Ensures long-term solder joint reliability with JESD201 Class 2 whisker resistance and J-STD-002 solderability |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor VOUT and chassis ground. Use Value: Limits transient voltage to ≤67.8 V, preventing damage to 5 V ADC inputs and maintaining signal integrity during 1500 W surges. | Use Scenario: Safeguarding 24 V digital input modules in factory automation against ESD and inductive switching noise from solenoid valves. IC Role / Device Role / Timing Role: Standoff protector on dry-contact input lines, operating below 38.1 V normal voltage. Use Value: Blocks false triggering while clamping 22.1 A transients within 1 ns, preserving logic-level recognition accuracy. |
| Telecom Power Rail Protection | Motor Drive Gate Driver Protection |
Use Scenario: Shielding 48 V PoE-powered Ethernet switch power inputs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC/DC converter input. Use Value: Absorbs 1500 W pulses without degradation, maintaining <1 µA leakage at 38.1 V to avoid quiescent current penalties. | Use Scenario: Protecting high-side N-channel MOSFET gate drivers in BLDC motor inverters from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Clamping diode between gate and source, referenced to driver IC ground. Use Value: Responds in <1 ns to clamp gate-source voltage to ≤67.8 V, preventing unintended turn-on and device avalanche failure. |
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 | Lower 400 W peak power; SMA package; 47 V VBR min/max tighter (44.7–49.4 V) | Not AEC-Q101 qualified; limited to commercial/industrial ambient (-65 °C to +150 °C) | Select when cost-sensitive, space-constrained, and automotive qualification is not required |
| 1.5KE47A | Same 1500 W rating and 47 V nominal, but TO-204AA (DO-41) package; no HE3 whisker rating | Lacks JESD201 Class 2 whisker compliance and AEC-Q101 validation; higher thermal resistance | Choose for legacy board compatibility where lead finish and automotive reliability are secondary |
Compared with SMAJ47A-E3/5AT and 1.5KE47A, the 1.5KA47HE3/51 provides superior automotive-grade reliability, lower thermal resistance due to larger case, and guaranteed whisker resistance - making it the preferred choice for new AEC-Q101-compliant designs requiring long-term field robustness.
Availability
1.5KA47HE3/51 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom power rail surge suppression requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1.5KA47HE3/51 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, efficiency, and application-specific performance.
The 1.5KA series was engineered specifically for automotive and industrial transient suppression, combining high-temperature stability, AEC-Q101 qualification, and patented PAR® technology to deliver consistent clamping behavior under real-world surge stress.
FAQ
What is the exact breakdown voltage range for 1.5KA47HE3/51?
The 1.5KA47HE3/51 has a specified breakdown voltage (VBR) range of 42.3 V to 51.7 V at 1.0 mA test current, per Vishay Document 88300 Rev. 20-Oct-08. This range ensures reliable clamping onset in 36 V automotive systems while accommodating manufacturing tolerances and temperature drift. The 1.5KA47HE3/51 maintains this specification across its full operating temperature range.
Is 1.5KA47HE3/51 qualified for automotive use?
Yes, the 1.5KA47HE3/51 is AEC-Q101 qualified and designated as high-reliability/automotive grade (base P/N HE3). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and surge lifetime validation. The 1.5KA47HE3/51 is explicitly intended for under-hood and safety-critical automotive applications per Vishay's documentation.
What does the HE3 suffix mean on 1.5KA47HE3/51?
The HE3 suffix on 1.5KA47HE3/51 indicates RoHS-compliant construction, high-reliability/automotive qualification, and compliance with JESD201 Class 2 whisker resistance testing. It also confirms matte tin-plated leads meeting J-STD-002 solderability standards. The 1.5KA47HE3/51 HE3 designation is integral to its AEC-Q101 certification and long-term reliability in demanding environments.
What is the maximum clamping voltage for 1.5KA47HE3/51 under surge conditions?
The maximum clamping voltage (VC) for 1.5KA47HE3/51 is 67.8 V at 22.1 A peak pulse current (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 transient events, and is critical for ensuring downstream components remain within absolute maximum ratings. The 1.5KA47HE3/51 achieves this with low incremental surge resistance.
Can 1.5KA47HE3/51 be used in bidirectional configurations?
No, the 1.5KA47HE3/51 is available in uni-directional polarity only, as confirmed in the Vishay datasheet features section. It functions as a reverse-biased clamp and must be oriented with cathode toward the protected line. For bidirectional protection, two 1.5KA47HE3/51 devices would need to be used in series opposition - though Vishay offers dedicated bi-directional variants (e.g., 1.5KA47A) for such use cases.
1.5KA47HE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Bulk
- 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
1.5KA47HE3/51 FAQ
1.How can I place an order for 1.5KA47HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA47HE3/51 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 1.5KA47HE3/51 reliable?
The price and inventory of 1.5KA47HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA47HE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA47HE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA47HE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA47HE3/51?
1.5KA47HE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA47HE3/51 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 1.5KA47HE3/51?
For technical support, including 1.5KA47HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA47HE3/51 requirements.
6.How does Aetrix verify that 1.5KA47HE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA47HE3/51 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 1.5KA47HE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA47HE3/51?
All 1.5KA47HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA47HE3/51, 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 1.5KA47HE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA47HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA47HE3/51 Tags
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