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Vishay General Semiconductor - Diodes Division 1.5KA20AHE3/51
- Part No.:
- 1.5KA20AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA20AHE3/51.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:6,782
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Product details
Overview
1.5KA20AHE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in the 1.5KA case style, rated for 1500 W peak pulse power (10/1000 µs), 54.2 A peak pulse current, and 27.7 V clamping voltage at IPPM. It features AEC-Q101 qualification, 185 °C max junction temperature, and RoHS-compliant HE3 packaging with matte tin-plated leads.
For engineers reviewing the 1.5KA20AHE3/51 datasheet, 1.5KA20AHE3/51 pinout, 1.5KA20AHE3/51 application, or 1.5KA20AHE3/51 equivalent, key selection criteria include clamping performance under 10/1000 µs transients, high-temperature reliability up to 185 °C, AEC-Q101 qualification for automotive use, and compatibility with J-STD-002 solderability standards.
Technical Context
This TVS diode employs patented PAR® construction for stable clamping under repetitive surge stress and operates exclusively in unidirectional polarity. Its breakdown voltage is tightly specified at 19.0–21.0 V (VBR min/max at 1 mA), with a 17.1 V stand-off voltage (VWM) and only 1.0 µA reverse leakage at TJ = 150 °C.
The device delivers low incremental surge resistance and fast response time to protect downstream components such as MOSFETs and sensor signal lines. It is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and supports operation across –65 °C to +185 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients common in automotive load-dump and inductive switching events |
| Clamping Voltage at IPPM | 27.7 V - limits voltage seen by protected ICs during 54.2 A surge, ensuring safe operation below 30 V logic thresholds |
| Breakdown Voltage (VBR) | 19.0–21.0 V at 1 mA - defines precise conduction onset for predictable overvoltage protection |
| Stand-off Voltage (VWM) | 17.1 V - allows reliable blocking of normal operating voltages while remaining below VBR |
| Junction Temperature Range | –65 °C to +185 °C - enables deployment in under-hood automotive environments and industrial hot zones |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC standard |
| RoHS & Whisker Tested | HE3 suffix meets RoHS 2002/95/EC and JESD201 Class 2 whisker resistance - ensures long-term solder joint integrity |
Pinout & Package
Package: Case Style 1.5KA - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Provides low-impedance path to ground during transient clamping in unidirectional configuration |
| Cathode | Current exit point in forward bias; marked by color band; connects to protected line | Receives surge energy from signal/power line and shunts it to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance over lifetime, critical for repeatable clamping in harsh environments |
| 1500 W peak pulse rating (10/1000 µs) | Meets ISO 7637-2 Pulse 5a/b (load dump) requirements for 12 V automotive systems |
| AEC-Q101 qualification (HE3 grade) | Validated for automotive under-hood use with extended temperature, humidity, and mechanical stress testing |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during surge, protecting 24 V-rated components downstream |
| Matte tin-plated leads (J-STD-002 compliant) | Ensures robust solder wetting and intermetallic formation on PCBs without lead-free process risk |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load-dump transients (ISO 7637-2 Pulse 5) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 27.7 V. Use Value: Prevents latch-up or destruction of microcontrollers and CAN transceivers during engine cranking or alternator failure events. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors from ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff protection element on signal line input, conducting only during >19 V transients. Use Value: Maintains signal integrity below 17.1 V operating range while clamping fast 10/1000 µs spikes to ≤27.7 V. |
| Automotive Lighting Control | Telecom DC Power Input Protection |
Use Scenario: Safeguarding LED driver ICs and MOSFET switches in headlamp modules exposed to relay coil flyback and PWM noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on switched 12 V supply rail, activated within nanoseconds of overvoltage. Use Value: Absorbs 200 A surge (8.3 ms) without degradation, preserving driver FET gate oxide integrity. | Use Scenario: Guarding primary DC input (e.g., –48 V telecom supply) against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Front-end transient suppressor before DC/DC converter input stage. Use Value: Clamps 1500 W pulses with <1 ns response, limiting voltage excursion to protect upstream rectifiers and filter caps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20AHE3/52 | 600 W rating (vs. 1500 W); SMA package (smaller footprint); same VBR/VWM specs | Lower power handling limits use to sub-100 W systems; not suitable for load-dump duty | Select when board space is constrained and surge energy is limited to IEC 61000-4-5 Level 3 |
| 1.5KE20A | Same 1500 W rating but TO-204AA (DO-41) package; no AEC-Q101 qualification; higher VF (3.5 V @ 100 A) | Lacks automotive reliability validation; unsuitable for production automotive programs requiring AEC compliance | Choose for cost-sensitive industrial prototypes where qualification is not mandated |
Compared with SMBJ20AHE3/52 and 1.5KE20A, the 1.5KA20AHE3/51 uniquely combines AEC-Q101 qualification, 1500 W capability, and axial-leaded 1.5KA packaging-making it the only option qualified for volume automotive power-line protection where both energy handling and reliability are mandatory.
Availability
1.5KA20AHE3/51 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, lighting control modules, and telecom DC power inputs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KA20AHE3/51 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and test facilities focused on high-reliability passive and protection components.
The 1.5KA series was developed specifically for automotive-grade transient suppression, emphasizing AEC-Q101 qualification, high-temperature stability up to 185 °C, and robust PAR® construction for consistent clamping performance across life cycles.
FAQ
What is the clamping voltage of the 1.5KA20AHE3/51 at its rated peak pulse current?
The 1.5KA20AHE3/51 has a maximum clamping voltage (VC) of 27.7 V at its rated peak pulse current (IPPM) of 54.2 A, measured under the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 20-Oct-08 (Document Number: 88300) and reflects the voltage across the device during full surge conduction. The 1.5KA20AHE3/51 maintains this clamping performance across its qualified temperature range.
Is the 1.5KA20AHE3/51 qualified for automotive applications?
Yes, the 1.5KA20AHE3/51 is AEC-Q101 qualified and designated as an automotive-grade part (HE3 suffix). It meets requirements for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge per the AEC-Q101 standard. The 1.5KA20AHE3/51 is intended for under-hood and powertrain applications where reliability under thermal and electrical stress is critical.
What does the HE3 suffix mean on the 1.5KA20AHE3/51?
The HE3 suffix on the 1.5KA20AHE3/51 indicates RoHS compliance, high-reliability construction, and qualification to JESD201 Class 2 for tin whisker resistance. It also confirms compliance with RoHS Directive 2002/95/EC and WEEE Directive 2002/96/EC. The 1.5KA20AHE3/51's matte tin-plated leads meet J-STD-002 solderability requirements, ensuring robust assembly in lead-free processes.
What is the standoff voltage (VWM) and breakdown voltage (VBR) range for the 1.5KA20AHE3/51?
The 1.5KA20AHE3/51 has a standoff voltage (VWM) of 17.1 V and a breakdown voltage (VBR) range of 19.0 V (min) to 21.0 V (max), measured at 1 mA test current. These values ensure reliable blocking during normal operation while triggering clamping before downstream components exceed absolute maximum ratings. The 1.5KA20AHE3/51's tight VBR tolerance supports precise overvoltage protection design.
Can the 1.5KA20AHE3/51 be used in bidirectional configurations?
No, the 1.5KA20AHE3/51 is available in uni-directional polarity only, as explicitly stated in the Vishay datasheet. It must be oriented with the cathode (marked by color band) toward the protected line and anode to ground. For bidirectional protection, a separate device such as the 1.5KA20CAHE3/51 would be required - the 1.5KA20AHE3/51 does not support reverse-conduction functionality.
1.5KA20AHE3/51 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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
1.5KA20AHE3/51 FAQ
1.How can I place an order for 1.5KA20AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA20AHE3/51 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 1.5KA20AHE3/51 reliable?
The price and inventory of 1.5KA20AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA20AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA20AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA20AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA20AHE3/51?
1.5KA20AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA20AHE3/51 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 1.5KA20AHE3/51?
For technical support, including 1.5KA20AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA20AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA20AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA20AHE3/51 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 1.5KA20AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA20AHE3/51?
All 1.5KA20AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA20AHE3/51, 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 1.5KA20AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA20AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA20AHE3/51 Tags
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