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Vishay General Semiconductor - Diodes Division 1.5KA47AHE3/54
- Part No.:
- 1.5KA47AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA47AHE3/54.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,315
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Product details
Overview
1.5KA47AHE3/54 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. 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 - ideal for protecting MOSFETs and sensor interfaces in automotive engine control units.
For engineers reviewing the 1.5KA47AHE3/54 datasheet, 1.5KA47AHE3/54 pinout, 1.5KA47AHE3/54 application, or 1.5KA47AHE3/54 equivalent, key selection criteria include its AEC-Q101 qualification, 44.7–49.4 V breakdown range, 40.2 V stand-off voltage, 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 DC rail protection with fast response time and low incremental surge resistance - critical for suppressing load-dump transients in 12 V/24 V automotive systems.
The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits 3.5 V max forward voltage at 100 A, supporting robust overcurrent handling during fault conditions without latch-up. Its 185 °C max junction temperature and -65 °C to +185 °C operating range align with under-hood automotive thermal requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients like ISO 7637-2 Pulse 5a without degradation |
| Breakdown Voltage (VBR) | 44.7–49.4 V at 1 mA - ensures reliable triggering above system nominal voltage |
| Stand-off Voltage (VWM) | 40.2 V - blocks normal 36 V automotive supply while remaining fully off |
| Clamping Voltage (VC) | 64.8 V at 23.1 A - limits downstream IC voltage to safe levels during surge |
| Junction Temperature Range | -65 °C to +185 °C - qualified for under-hood placement in modern powertrain modules |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and HTGB |
| RoHS & Whisker Rating | RoHS-compliant HE3 suffix; JESD201 Class 2 tin whisker resistance |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, axial lead configuration. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side return | Enables unidirectional clamping from cathode to anode during reverse surge events |
| Cathode | Protected line connection; marked by color band | Connected to power rail or signal line requiring overvoltage suppression - absorbs surge energy into ground path |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Ensures consistent clamping performance across 1000+ surge cycles and high-temperature aging |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V/24 V vehicle systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time capability) |
| Solder dip tolerance | Withstands 260 °C for 40 s - compatible with standard lead-free reflow and wave soldering |
| Automotive-grade reliability | AEC-Q101 qualified with full test report coverage including HTGB, HTRB, and TCT |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: Protects 12 V main power input of ECU against load-dump transients up to 120 V generated by alternator field-circuit interruption. IC Role / Device Role / Timing Role: TVS diode placed upstream of DC/DC converter input to clamp surges before regulation stage. Use Value: Clamps to 64.8 V at 23.1 A, limiting stress on downstream LDOs and microcontrollers while surviving >1000 pulses per AEC-Q101. | Use Scenario: Shields high-speed CAN FD transceivers from ESD and coupled noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Unidirectional TVS connected between CANH/CANL and chassis ground to absorb common-mode surges. Use Value: 40.2 V stand-off avoids false triggering during CAN recessive states; 64.8 V clamping preserves transceiver integrity during ISO 10605 ±30 kV ESD events. |
| Electric Power Steering (EPS) Motor Driver | ADAS Camera Power Rail |
Use Scenario: Guards gate drivers and current-sense amplifiers in EPS H-bridge against inductive kickback from motor commutation. IC Role / Device Role / Timing Role: Mounted across motor phase outputs to clamp flyback voltage spikes during PWM switching. Use Value: 200 A IFSM rating handles repeated 8.3 ms surges; 185 °C TJ max supports compact heatsink-less placement near MOSFETs. | Use Scenario: Secures 5 V or 3.3 V camera module supply against ignition noise and battery transients in rear-view or surround-view systems. IC Role / Device Role / Timing Role: Placed at camera module PCB edge, parallel to input capacitor, to shunt surge energy before LDO regulator. Use Value: Low 0.101 %/°C VBR tempco maintains precise clamping threshold across -40 °C to +125 °C ambient, preventing drift-induced misprotection. |
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 | 600 W PPPM, 48 V VBR, DO-214AA package, lower power rating and smaller thermal mass | Suitable for lower-energy surges (e.g., ISO 7637-2 Pulse 1/2); not AEC-Q101 qualified | Select when cost or board space is prioritized over automotive load-dump immunity |
| 1.5KE47A | Same VBR/VC specs but TO-204AE (axial) package, no HE3 whisker rating, not AEC-Q101 qualified | Acceptable for industrial/commercial use only; lacks automotive reliability validation | Choose only for non-automotive designs where AEC-Q101 and JESD201 compliance are not required |
Compared with SMBJ48A-E3/52 and 1.5KE47A, the 1.5KA47AHE3/54 provides 2.5× higher peak pulse power, AEC-Q101 qualification, and JESD201 Class 2 whisker resistance - making it the sole option for production automotive power rail protection meeting OEM Tier-1 requirements.
Availability
1.5KA47AHE3/54 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, electric power steering systems, and body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1.5KA47AHE3/54 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, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5KA series was engineered specifically for automotive transient suppression, emphasizing AEC-Q101 compliance, high-temperature stability, and robust surge endurance in harsh under-hood environments.
FAQ
What is the exact breakdown voltage range for the 1.5KA47AHE3/54?
The 1.5KA47AHE3/54 has a guaranteed breakdown voltage (VBR) range of 44.7 V to 49.4 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tighter tolerance versus the standard 1.5KA47 (42.3–51.7 V) reflects its "A" grade binning for improved consistency in automotive safety-critical circuits.
Is the 1.5KA47AHE3/54 suitable for bidirectional surge protection?
No - the 1.5KA47AHE3/54 is unidirectional only, with cathode marked by a color band. It protects against positive-going transients on DC lines referenced to ground. For bidirectional AC or data-line protection, a different family such as the SMAJ series would be required.
Does the 1.5KA47AHE3/54 meet AEC-Q101 requirements?
Yes - the 1.5KA47AHE3/54 is explicitly AEC-Q101 qualified, as confirmed in the "Notes" section of Vishay document 88300. Qualification includes high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling (TCT), and mechanical shock testing per automotive reliability standards.
What does the HE3/54 suffix mean in 1.5KA47AHE3/54?
The HE3 suffix denotes RoHS-compliant, high-reliability automotive grade with JESD201 Class 2 whisker resistance; the "54" indicates the preferred package code for 13" paper tape and reel, 1400 units per reel - standard for automated SMT placement in automotive manufacturing.
How does the clamping voltage of 1.5KA47AHE3/54 compare to its stand-off voltage?
The 1.5KA47AHE3/54 has a stand-off voltage (VWM) of 40.2 V and clamps at 64.8 V when subjected to its rated 23.1 A peak pulse current (10/1000 µs). This 24.6 V differential ensures sufficient margin above normal operating voltage while limiting downstream component stress during surge events.
1.5KA47AHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- 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
1.5KA47AHE3/54 FAQ
1.How can I place an order for 1.5KA47AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA47AHE3/54 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 1.5KA47AHE3/54 reliable?
The price and inventory of 1.5KA47AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA47AHE3/54 is usually 5 days.
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1.5KA47AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA47AHE3/54 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 1.5KA47AHE3/54?
For technical support, including 1.5KA47AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA47AHE3/54 requirements.
6.How does Aetrix verify that 1.5KA47AHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA47AHE3/54 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 1.5KA47AHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA47AHE3/54?
All 1.5KA47AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA47AHE3/54, 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 1.5KA47AHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA47AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA47AHE3/54 Tags
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