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Vishay General Semiconductor - Diodes Division 1.5KA47AHE3/51
- Part No.:
- 1.5KA47AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA47AHE3/51.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,239
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Product details
Overview
1.5KA47AHE3/51 from Vishay General Semiconductor is an automotive-grade unidirectional 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 64.8 V under 23.1 A surge current, and operates up to +185 °C junction temperature - enabling robust protection of MOSFETs, sensor signal lines, and ICs in automotive powertrain and body electronics.
For engineers reviewing the 1.5KA47AHE3/51 datasheet, 1.5KA47AHE3/51 pinout, 1.5KA47AHE3/51 application, or 1.5KA47AHE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 44.7–49.4 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 employs Vishay's patented PAR® construction for stable clamping under repetitive transients and high-temperature operation. Its unidirectional polarity and 1.0 µA max reverse leakage at 40.2 V stand-off voltage ensure minimal system loading during normal operation.
The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits 3.5 V max forward voltage at 100 A, supporting high-current fault suppression without forward conduction degradation. Thermal derating follows a defined curve to maintain safe operation up to TL = 75 °C on infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - withstands ISO 7637-2 Pulse 5a/b-level surges in 12 V automotive systems |
| Breakdown Voltage VBR | 44.7–49.4 V at 1.0 mA - ensures reliable triggering above 40.2 V stand-off without false trips |
| Clamping Voltage VC | 64.8 V at 23.1 A - limits downstream voltage stress to levels safe for 60 V-rated MOSFETs and microcontrollers |
| Junction Temperature Range | −65 °C to +185 °C - supports under-hood placement in engine control units and ADAS modules |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC standard |
| RoHS & Whisker Compliance | RoHS 2002/95/EC; JESD201 Class 2 - eliminates tin whisker risk in long-life automotive assemblies |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body (UL 94 V-0), matte tin-plated leads, 0.375" (9.5 mm) lead length, axial lead configuration. Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line (e.g., battery rail or signal trace); must be routed with low-inductance path |
| Cathode | Current exit point during clamping; marked by color band | Connected to ground reference plane; requires low-impedance return path to sustain 23.1 A surge current |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across 1000+ surge cycles at 125 °C |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (500 W typical) with 3× margin for design headroom |
| 0.101 %/°C VBR tempco | Maintains tight clamping window over full −40 °C to +125 °C ambient range |
| Solder dip 260 °C, 40 s | Supports lead-free reflow and wave soldering without parameter shift or delamination |
| Uni-directional polarity only | Optimized for DC-biased rails (e.g., 12 V battery, 5 V supply) where reverse conduction is not required |
Applications
| Automotive Power Distribution | Engine Control Unit (ECU) Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed power rails against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping device placed at power input stage before DC-DC converters and LDOs. Use Value: Limits voltage to ≤64.8 V during 100 V/400 ms load dump events, preventing damage to 60 V-rated power semiconductors. |
Use Scenario: Safeguarding microcontroller I/O and sensor interface lines in under-hood ECUs. IC Role / Device Role / Timing Role: Point-of-load TVS on CAN, LIN, and analog sensor inputs exposed to inductive switching noise. Use Value: Responds in <1 ps to clamp fast-rising transients (<1 ns rise time), preserving signal integrity and ADC accuracy. |
| ADAS Camera Module | Body Control Module (BCM) |
Use Scenario: Shielding FPD-Link III or GMSL serial video interfaces from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100–200 pF at VWM) placed directly at connector entry. Use Value: Clamps ±15 kV contact ESD per IEC 61000-4-2 without distorting 3 Gbps video data streams. |
Use Scenario: Protecting relay driver outputs and door lock actuator circuits from inductive kickback. IC Role / Device Role / Timing Role: High-surge-capacity TVS mounted across relay coil terminals. Use Value: Absorbs 200 A 8.3 ms surge energy without failure, extending relay lifetime and reducing MCU reset events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A-E3/52 | Lower PPPM (600 W), smaller SMB package (vs. axial 1.5KA), 48 V nominal VBR | Not AEC-Q101 qualified; rated for commercial/industrial use only | Select when space-constrained PCB layout prioritizes footprint over automotive qualification and surge margin |
| 1.5KE47A | Same VBR range but lower TJ max (175 °C vs. 185 °C); no HE3 whisker rating; legacy DO-201 package | Lacks AEC-Q101 validation and JESD201 Class 2 compliance | Acceptable for non-automotive industrial designs where extended temperature margin and whisker resistance are not required |
Compared with 1.5KA47AHE3/51, SMBJ48A-E3/52 trades 60% peak power and automotive qualification for compactness, while 1.5KE47A retains basic clamping performance but omits high-reliability process controls needed for automotive production life cycles.
Availability
1.5KA47AHE3/51 is available at Aetrix Electronics and suitable for automotive power distribution, engine control unit (ECU) protection, ADAS camera module hardening, and body control module (BCM) surge suppression requiring stable component supply across multi-year vehicle programs.
Supply support for 1.5KA47AHE3/51 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 high-reliability diodes, rectifiers, and protection devices for demanding environments.
The 1.5KA series was engineered specifically for automotive transient suppression, combining AEC-Q101 qualification, high-temperature stability, and patented PAR® technology to meet ISO 7637-2 and ISO 16750-2 requirements.
FAQ
What is the maximum clamping voltage of the 1.5KA47AHE3/51 under rated surge conditions?
The 1.5KA47AHE3/51 has a maximum clamping voltage (VC) of 64.8 V at 23.1 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 64.8 V during standardized surge events - critical for protecting 60 V-rated power MOSFETs and automotive microcontrollers. The 1.5KA47AHE3/51 maintains this clamping performance across its full operating temperature range.
Is the 1.5KA47AHE3/51 qualified for automotive applications?
Yes, the 1.5KA47AHE3/51 is explicitly AEC-Q101 qualified, as confirmed in Vishay document 88300 (Revision 20-Oct-08), Note (1). It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD per AEC standards. The HE3 suffix further denotes RoHS compliance and JESD201 Class 2 whisker resistance - both mandatory for automotive production. The 1.5KA47AHE3/51 is approved for under-hood and chassis-mounted applications.
What does the "HE3" suffix mean in 1.5KA47AHE3/51?
The "HE3" suffix in 1.5KA47AHE3/51 indicates a high-reliability, automotive-grade variant meeting RoHS 2002/95/EC and passing JESD201 Class 2 whisker testing. It features matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards, and is rated for solder dip at 260 °C for 40 seconds. This suffix distinguishes it from non-automotive versions and confirms suitability for long-life automotive assemblies. The 1.5KA47AHE3/51 is built to these exact specifications.
How does the 1.5KA47AHE3/51 differ from the standard 1.5KA47A?
The 1.5KA47AHE3/51 is the RoHS-compliant, high-reliability automotive version of the 1.5KA47A, distinguished by the HE3 suffix. While both share identical electrical parameters (VBR, VC, PPPM), the 1.5KA47AHE3/51 adds JESD201 Class 2 whisker resistance, tighter process controls, and full AEC-Q101 qualification - documented in Vishay spec 88300. The base 1.5KA47A lacks these automotive-specific validations. The 1.5KA47AHE3/51 is the only version approved for OEM automotive production.
What is the thermal derating behavior of the 1.5KA47AHE3/51 above 25 °C ambient?
The 1.5KA47AHE3/51 follows a defined derating curve (Fig. 2 in Vishay doc 88300): peak pulse power decreases linearly from 100% at 25 °C to ~50% at 125 °C junction temperature. For continuous power dissipation (PD), the device is rated at 6.5 W on infinite heatsink at TL = 75 °C, with derating to zero at TL = 200 °C. These curves ensure predictable performance in under-hood environments. The 1.5KA47AHE3/51 datasheet provides exact derating percentages per temperature increment.
1.5KA47AHE3/51 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA47AHE3/51 FAQ
1.How can I place an order for 1.5KA47AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA47AHE3/51 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 1.5KA47AHE3/51 reliable?
The price and inventory of 1.5KA47AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA47AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA47AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA47AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA47AHE3/51?
1.5KA47AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA47AHE3/51 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 1.5KA47AHE3/51?
For technical support, including 1.5KA47AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA47AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA47AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA47AHE3/51 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 1.5KA47AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA47AHE3/51?
All 1.5KA47AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA47AHE3/51, 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 1.5KA47AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA47AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA47AHE3/51 Tags
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