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Vishay General Semiconductor - Diodes Division 1.5KA16AHE3/51
- Part No.:
- 1.5KA16AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA16AHE3/51.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:3,291
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Product details
Overview
1.5KA16AHE3/51 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients on power and signal lines. It delivers 1500 W peak pulse power (10/1000 µs), has a breakdown voltage range of 15.2–16.8 V at 1 mA, clamps to ≤22.5 V at 66.7 A, and operates up to +185 °C junction temperature. It is used to protect MOSFETs and sensor ICs in automotive engine control units.
For engineers reviewing the 1.5KA16AHE3/51 datasheet, 1.5KA16AHE3/51 pinout, 1.5KA16AHE3/51 application, or 1.5KA16AHE3/51 equivalent, key selection criteria include AEC-Q101 qualification, 1.0 mm² stand-off voltage (13.6 V), low clamping ratio (1.49×VBR), and JESD201 Class 2 whisker resistance - all critical for under-hood automotive reliability.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable high-temperature operation and low incremental surge resistance. Its unidirectional polarity enables precise reverse-biased clamping during positive transients, with fast response time (<1 ns) and minimal capacitance (≈100 pF at 1 MHz).
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C, and maintains clamping performance across -65 °C to +185 °C operating junction temperature range per AEC-Q101 stress requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains automotive load-dump and ISO 7637-2 pulse 5a without failure |
| Breakdown Voltage VBR | 15.2–16.8 V at 1 mA - defines precise clamping onset threshold for 12 V system protection |
| Clamping Voltage VC | ≤22.5 V at 66.7 A - limits downstream voltage stress to safe levels for 3.3 V/5 V logic and gate drivers |
| Stand-off Voltage VWM | 13.6 V - ensures no conduction during normal 12 V nominal operation with margin |
| Operating Temperature Range | -65 °C to +185 °C - qualified for under-hood placement in engine control modules |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD |
| RoHS & Whisker Compliance | RoHS-compliant (2002/95/EC); JESD201 Class 2 tin whisker resistant |
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; axial lead configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; handles full 200 A surge current |
| Cathode | Clamping node / protected line connection | Connected to protected line (e.g., battery rail or sensor supply); color band marked |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR drift <±5 % over 1000 hrs at 150 °C - critical for long-life engine bay deployment |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 5a (75 V/300 ms) and load dump events without degradation |
| AEC-Q101 qualification | Validated for automotive use including HTGB, HTRB, temperature cycling, and mechanical shock |
| Low clamping ratio (1.49×VBR) | Minimizes overvoltage exposure to downstream FETs and microcontrollers during transients |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal/humidity stress - eliminates latent field failures |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Supply |
|---|---|
Use Scenario: Protects 12 V battery rail from alternator load dump and solenoid coil flyback in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤22.5 V, preventing latch-up or gate oxide damage in buck controller ICs rated for 28 V absolute max. |
Use Scenario: Shields IGBT gate driver supply rails from inductive kickback during motor commutation in HVAC and pump drives. IC Role / Device Role / Timing Role: Standoff-clamp protector on isolated 15 V auxiliary supply feeding optocoupled gate drivers. Use Value: Clamps 100–200 V spikes within 1 ns, avoiding false triggering or destruction of 5 V logic-level gate drive ICs. |
| Automotive Sensor Signal Line Protection | Telecom Power Interface Protection |
Use Scenario: Safeguards LIN bus or analog sensor outputs (e.g., pressure, temperature) against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) unidirectional TVS placed at connector interface before signal conditioning amplifier. Use Value: Maintains signal integrity up to 1 MHz while suppressing ±8 kV contact ESD per IEC 61000-4-2 without distorting sensor output waveform. |
Use Scenario: Protects 48 V telecom power feed (e.g., PoE midspan) from lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary coarse-clamp device upstream of active DC-DC converters and hot-swap controllers. Use Value: Absorbs 1500 W surge energy without thermal runaway, enabling compliance with ITU-T K.21 basic protection level. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16AHE3/52 | Same VBR (15.2–16.8 V), lower PPPM (600 W), SMB package (smaller footprint, lower thermal mass) | Not AEC-Q101 qualified; limited to ambient ≤125 °C; unsuitable for under-hood use | Select only for cost-sensitive consumer or industrial applications where automotive qualification is not required. |
| 1.5KE16A | Same VBR, same 1500 W rating, but TO-204AE (DO-201AD) package; no AEC-Q101 or JESD201 Class 2 certification | Lacks automotive reliability validation; higher thermal resistance; not recommended for production automotive designs | Use only for prototyping or legacy board reuse where HE3 suffix compliance is not mandated. |
Compared with SMBJ16AHE3/52 and 1.5KE16A, the 1.5KA16AHE3/51 uniquely combines AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and 185 °C junction rating - making it the sole choice for production automotive power rail protection where long-term under-hood reliability is non-negotiable.
Availability
1.5KA16AHE3/51 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, telecom power interfaces, and sensor signal line protection requiring stable component supply across extended temperature and high-reliability environments.
Supply support for 1.5KA16AHE3/51 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 industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing thermal stability, surge robustness, and long-term whisker-free solder joint integrity.
FAQ
What is the maximum clamping voltage of the 1.5KA16AHE3/51 at its rated peak pulse current?
The 1.5KA16AHE3/51 clamps to a maximum of 22.5 V at its rated peak pulse current of 66.7 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream components such as 28 V-rated DC-DC controllers or 5 V logic interfaces when used in automotive 12 V systems.
Is the 1.5KA16AHE3/51 qualified to AEC-Q101, and what tests does that include?
Yes, the 1.5KA16AHE3/51 is AEC-Q101 qualified - confirmed in the "MECHANICAL DATA" section of Vishay document 88300. Qualification includes high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling, mechanical shock, and ESD testing per JESD22-A114, ensuring suitability for automotive under-hood applications.
What does the "HE3" suffix indicate in 1.5KA16AHE3/51?
The "HE3" suffix in 1.5KA16AHE3/51 denotes RoHS-compliant, high-reliability, automotive-grade construction per Vishay's internal specification. It confirms matte tin plating compliant with J-STD-002 and JESD22-B102, plus JESD201 Class 2 whisker resistance - essential for long-term reliability in thermally cycled automotive assemblies.
Can the 1.5KA16AHE3/51 be used in bidirectional configurations?
No, the 1.5KA16AHE3/51 is unidirectional only, as explicitly stated in the FEATURES section of document 88300. Its cathode-band marking and electrical characteristics (e.g., forward voltage of 3.5 V at 100 A) confirm single-polarity operation; bidirectional protection requires pairing two devices or selecting a dedicated bidirectional variant like 1.5KA16CA.
What is the thermal resistance junction-to-lead (RθJL) for the 1.5KA16AHE3/51?
Vishay does not publish RθJL for the 1.5KA16AHE3/51 in document 88300. However, Figure 5 provides the power derating curve referenced to lead temperature (TL = 75 °C), and the device achieves 6.5 W dissipation under those conditions - enabling thermal design via empirical lead temperature monitoring rather than analytical Rθ modeling.
1.5KA16AHE3/51 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):
- 13.6V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 66.7A
- 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
1.5KA16AHE3/51 FAQ
1.How can I place an order for 1.5KA16AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA16AHE3/51 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 1.5KA16AHE3/51 reliable?
The price and inventory of 1.5KA16AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA16AHE3/51 is usually 5 days.
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1.5KA16AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA16AHE3/51 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 1.5KA16AHE3/51?
For technical support, including 1.5KA16AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA16AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA16AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA16AHE3/51 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 1.5KA16AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA16AHE3/51?
All 1.5KA16AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA16AHE3/51, 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 1.5KA16AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA16AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA16AHE3/51 Tags
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