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Vishay General Semiconductor - Diodes Division 1.5KA27AHE3/73
- Part No.:
- 1.5KA27AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA27AHE3/73.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:7,068
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Product details
Overview
1.5KA27AHE3/73 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 37.5 V under 40 A peak pulse current, and operates up to +185 °C junction temperature - ideal for protecting MOSFETs and sensor signal lines in automotive powertrain control units.
For engineers reviewing the 1.5KA27AHE3/73 datasheet, 1.5KA27AHE3/73 pinout, 1.5KA27AHE3/73 application, or 1.5KA27AHE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, 25.7–28.4 V breakdown range, low 0.096 %/°C VBR temperature coefficient, 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 maintains reliable performance across -65 °C to +185 °C operating range. Its unidirectional polarity and 23.1 V stand-off voltage enable precise overvoltage thresholding in DC power rails.
The device exhibits fast response time (<1 ns), low incremental surge resistance, and 3.5 V maximum forward voltage at 100 A - critical for minimizing conduction loss during forward-biased surge events in automotive 12 V and 24 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients from load dump or inductive switching without failure |
| Breakdown Voltage (VBR) | 25.7–28.4 V at 1 mA - defines precise clamping onset for 24 V automotive systems |
| Clamping Voltage (VC) | 37.5 V at 40 A IPPM - limits downstream voltage stress on protected ICs and MOSFETs |
| Stand-off Voltage (VWM) | 23.1 V - ensures no conduction during normal 24 V rail operation with margin |
| Junction Temperature Range | -65 °C to +185 °C - supports under-hood deployment in engine control modules |
| AEC-Q101 Qualified | Yes - certified for automotive reliability per stress test requirements |
| RoHS & Whisker Compliance | HE3 suffix: RoHS-compliant, JESD201 Class 2 tin whisker resistant |
Pinout & Package
Case Style 1.5KA: axial-lead DO-201AD package with matte tin-plated leads; cathode denoted by color band; molded epoxy body rated UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to system ground or low-side reference in unidirectional TVS configuration |
| Cathode | Current exit point in forward bias; clamping node in reverse bias | Connected to protected line (e.g., sensor supply or gate drive); absorbs surge energy into ground |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance and long-term stability under thermal cycling and repeated surges |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a/b requirements for automotive load dump suppression |
| Low 0.096 %/°C VBR tempco | Minimizes drift of clamping threshold across under-hood temperature extremes |
| Solder dip 260 °C, 40 s | Supports standard lead-free reflow and wave soldering processes without degradation |
| Uni-directional polarity only | Optimized for DC rail protection where reverse conduction must be blocked |
Applications
| Engine Control Unit (ECU) Power Input | Transmission Control Module (TCM) Sensor Lines |
|---|---|
Use Scenario: Protects 24 V supply input of diesel ECU against load dump transients exceeding 40 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamps surge energy before it reaches DC-DC converters and microcontroller power rails. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V LDOs and MCU I/Os during ISO 7637-2 Pulse 5 events. |
Use Scenario: Shields analog signal lines from crankshaft/camshaft position sensors exposed to ignition noise. IC Role / Device Role / Timing Role: Fast-response TVS diverts coupled EMI spikes away from precision ADC front-ends. Use Value: Maintains signal integrity and prevents false triggering in timing-critical engine synchronization circuits. |
| Electric Power Steering (EPS) Motor Driver | Body Control Module (BCM) LIN Bus Lines |
Use Scenario: Guards half-bridge gate drivers against inductive kickback from brushed EPS motor commutation. IC Role / Device Role / Timing Role: Clamps negative-going transients at MOSFET source nodes during turn-off. Use Value: Eliminates gate oxide stress and extends lifetime of 40 V logic-level MOSFETs in compact EPS inverters. |
Use Scenario: Suppresses ESD and burst noise on LIN bus lines connecting door modules and lighting controllers. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS avoids signal distortion on 19.2 kbps serial bus. Use Value: Ensures uninterrupted communication during ISO 10605 30 kV contact discharge 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 |
|---|---|---|---|
| SMBJ24AHE3/52 | Lower PPPM (600 W), lower VBR (25.6–28.2 V), SMB package (smaller footprint, lower thermal mass) | Suitable for space-constrained PCBs but limited to lower surge energy; not qualified to AEC-Q101 | Select when board area is critical and surge levels remain below 600 W; verify thermal derating at TL = 75 °C |
| 1.5KE27A | Same VBR range (25.7–28.4 V), same PPPM (1500 W), but TO-204AA (DO-41) package and no AEC-Q101 qualification | Lacks automotive reliability validation; higher thermal resistance than 1.5KA case | Acceptable for industrial non-automotive use; avoid in safety-critical or high-temperature under-hood locations |
Compared with SMBJ24AHE3/52 and 1.5KE27A, the 1.5KA27AHE3/73 provides superior thermal robustness via its larger DO-201AD case, guaranteed AEC-Q101 compliance, and validated performance at TJ = 185 °C - making it the preferred choice for production automotive ECUs requiring long-term field reliability.
Availability
1.5KA27AHE3/73 is available at Aetrix Electronics and suitable for automotive powertrain control, transmission sensor protection, and electric power steering systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1.5KA27AHE3/73 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 designs and manufactures discrete semiconductors with emphasis on reliability, ruggedness, and application-specific performance for automotive, industrial, and computing markets.
The 1.5KA series was developed specifically for AEC-Q101-compliant transient suppression in high-temperature automotive subsystems - prioritizing stable clamping, low leakage, and mechanical durability under vibration and thermal shock.
FAQ
What is the clamping voltage of the 1.5KA27AHE3/73 at its rated peak pulse current?
The 1.5KA27AHE3/73 has a maximum clamping voltage (VC) of 37.5 V at 40 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events. The clamping performance directly protects downstream components such as microcontrollers and gate drivers in automotive 24 V systems.
Is the 1.5KA27AHE3/73 qualified for automotive use?
Yes, the 1.5KA27AHE3/73 is explicitly AEC-Q101 qualified, as confirmed in the Vishay document 88300 revision 20-Oct-08. Its HE3 suffix denotes RoHS compliance and high-reliability automotive grade, including passing JESD201 Class 2 whisker testing. This qualification validates its suitability for safety-critical automotive applications including engine control, transmission, and ADAS subsystems.
What does the "HE3" suffix mean in 1.5KA27AHE3/73?
The "HE3" suffix in 1.5KA27AHE3/73 indicates a RoHS-compliant, high-reliability variant meeting automotive-grade requirements. It specifies matte tin-plated leads compliant with J-STD-002 and JESD22-B102, plus JESD201 Class 2 whisker resistance. The HE3 designation also confirms adherence to UL 94 V-0 flammability standards for the epoxy molding compound used in the DO-201AD package.
How does the 1.5KA27AHE3/73 differ from the non-A version (1.5KA27HE3/73)?
The 1.5KA27AHE3/73 features a tighter breakdown voltage range (25.7–28.4 V) versus the standard 1.5KA27HE3/73 (24.3–29.7 V), reflecting tighter process control for automotive applications. Both share identical power ratings and thermal specs, but only the "A" variant is AEC-Q101 qualified and carries the HE3 reliability enhancements required for production automotive use.
Can the 1.5KA27AHE3/73 be used in bidirectional configurations?
No, the 1.5KA27AHE3/73 is unidirectional only, as stated in the Vishay datasheet. Its internal structure and polarity marking (cathode band) support clamping only in reverse bias. For bidirectional protection, two devices must be connected in series opposing configuration - but this is not recommended without validation, as the 1.5KA27AHE3/73 is not characterized or rated for such use.
1.5KA27AHE3/73 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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
1.5KA27AHE3/73 FAQ
1.How can I place an order for 1.5KA27AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA27AHE3/73 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 1.5KA27AHE3/73 reliable?
The price and inventory of 1.5KA27AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA27AHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA27AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA27AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA27AHE3/73?
1.5KA27AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA27AHE3/73 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 1.5KA27AHE3/73?
For technical support, including 1.5KA27AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA27AHE3/73 requirements.
6.How does Aetrix verify that 1.5KA27AHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA27AHE3/73 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 1.5KA27AHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA27AHE3/73?
All 1.5KA27AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA27AHE3/73, 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 1.5KA27AHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA27AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA27AHE3/73 Tags
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