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Vishay General Semiconductor - Diodes Division 1.5KA11HE3/51
- Part No.:
- 1.5KA11HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA11HE3/51.pdf
- Description:
- TVS DIODE 8.92VWM 16.2VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:9,644
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Product details
Overview
1.5KA11HE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade 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 16.2 V under 92.6 A peak pulse current, and operates up to +185 °C junction temperature - deployed in automotive powertrain control units to protect MOSFET gate drivers from load dump transients.
For engineers reviewing the 1.5KA11HE3/51 datasheet, 1.5KA11HE3/51 pinout, 1.5KA11HE3/51 application, or 1.5KA11HE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 9.9–12.1 V breakdown range, low 0.075 %/°C VBR tempco, and HE3 suffix compliance with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for stable clamping under repeated surge stress and maintains low incremental surge resistance (<0.1 Ω typical) to minimize voltage overshoot during fast transients. Its unidirectional polarity and molded epoxy case with UL 94 V-0 rating support direct placement on high-reliability automotive PCBs without additional conformal coating.
Designed for inductive switching surge suppression, it responds in <1 ps with a 10/1000 µs waveform capability and supports 200 A non-repetitive forward surge (8.3 ms half-sine), enabling robust protection of 12 V automotive signal and power rails against ISO 7637-2 Pulse 1, 2a, 3a/b, and 5a/b events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs waveform) - sustains single-event load dump surges per ISO 16750-2 without degradation |
| Breakdown Voltage VBR | 9.9–12.1 V at 1 mA - ensures reliable triggering before downstream IC damage threshold |
| Clamping Voltage VC | 16.2 V at 92.6 A IPPM - limits protected node voltage to safe level for 12 V logic and gate drivers |
| Operating Temperature | -65 to +185 °C - qualified for under-hood automotive locations including engine control modules |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including HTOL, TC, UHAST, and mechanical shock per AEC standard |
| RoHS & Whisker | RoHS-compliant (2002/95/EC); HE3 suffix passes JESD201 Class 2 tin whisker testing |
| Surge Current IPPM | 92.6 A (10/1000 µs) - matches typical alternator load dump energy in 12 V systems |
Pinout & Package
Case Style 1.5KA: axial-leaded DO-201AD package with matte tin-plated leads, 0.375" (9.5 mm) lead length, UL 94 V-0 molded epoxy body, cathode indicated 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); conducts only during overvoltage event |
| Cathode | Current exit point during clamping; marked by color band | Connected to ground or low-impedance return path; defines unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across 1000+ surge cycles without parameter drift |
| 1500 W peak pulse rating | Handles full ISO 7637-2 Pulse 5a (load dump) without derating in ambient ≤85 °C |
| Low 0.075 %/°C VBR tempco | Maintains tight clamping window across -40 to +150 °C operating range - critical for engine bay use |
| AEC-Q101 qualification | Validated for automotive production use with zero failures in 1000-hour HTOL at 150 °C |
| Matte tin plating | Ensures solderability per J-STD-002 and eliminates tin whisker risk per JESD201 Class 2 |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting microcontroller I/O lines and CAN transceiver power rails from alternator load dump and relay coil flyback in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 12 V supply and ground, triggered within picoseconds to limit voltage to ≤16.2 V. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic and CAN PHY ICs during ISO 16750-2 Test 4a (load dump). |
Use Scenario: Shielding 24 V DC digital input channels in factory automation PLCs from inductive switching transients generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Standoff device mounted at field-side connector, absorbing 1500 W surges while maintaining <5 µA leakage at 24 V nominal. Use Value: Eliminates false triggering and extends service life of optocoupler input stages in EN 61000-4-4 EFT-immune designs. |
| Telecom Base Station Power Supply | Electric Vehicle Battery Management System (BMS) |
Use Scenario: Safeguarding DC-DC converter inputs in outdoor telecom cabinets exposed to lightning-induced surges on -48 V backplane rails. IC Role / Device Role / Timing Role: Primary surge arrestor upstream of PMIC, conducting >92 A peak current with <16.2 V clamping to preserve downstream regulation. Use Value: Meets ITU-T K.20/21 immunity requirements without requiring series impedance or additional filtering stages. |
Use Scenario: Protecting cell voltage monitoring ICs and isolation amplifiers in 400 V EV battery packs from high dV/dt transients during contactor switching. IC Role / Device Role / Timing Role: Localized TVS on each cell tap, rated for 185 °C operation to survive proximity to battery cells during thermal runaway events. Use Value: Enables functional safety compliance (ISO 26262 ASIL-B) by preventing erroneous voltage readings during high-energy transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11AHE3/52 | Lower 600 W PPPM rating; SMC (DO-214AB) surface-mount package; 11.1–12.3 V VBR; 17.0 V VC at 35.3 A | Targeted for space-constrained PCBs; lacks AEC-Q101 qualification; not rated for >150 °C ambient | Select when board area is limited and automotive qualification is not required. |
| 1.5KE11A | Same 1500 W rating but legacy DO-201AE package; no HE3 whisker compliance; 1000 h HTOL only at 125 °C; RoHS but not AEC-Q101 | Legacy industrial replacement; higher leakage (50 µA vs. 5 µA at VWM); no automotive traceability | Choose for cost-sensitive non-automotive designs where whisker resistance and extended temp range are not critical. |
Compared with 1.5KA11HE3/51, SMBJ11AHE3/52 offers smaller footprint but reduced surge capacity and no AEC-Q101 validation, while 1.5KE11A provides identical power rating but lacks high-temp reliability and automotive process controls - making 1.5KA11HE3/51 the sole option meeting full automotive production requirements.
Availability
1.5KA11HE3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC protection, and telecom power supply hardening requiring stable component supply across multi-year production cycles.
Supply support for 1.5KA11HE3/51 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, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5KA family targets automotive-grade transient suppression, engineered specifically to meet AEC-Q101 stress test requirements and deliver consistent clamping performance under extreme thermal and electrical cycling.
FAQ
What is the exact breakdown voltage range for 1.5KA11HE3/51?
The 1.5KA11HE3/51 has a guaranteed breakdown voltage (VBR) range of 9.9 V to 12.1 V measured at 1 mA test current, per Vishay Document 88300 Rev. 20-Oct-08. This range ensures reliable turn-on before damaging overvoltage reaches sensitive downstream circuitry in 12 V automotive systems.
Is 1.5KA11HE3/51 qualified for automotive use?
Yes, 1.5KA11HE3/51 is explicitly AEC-Q101 qualified per the manufacturer's documentation and carries the HE3 suffix indicating compliance with JESD201 Class 2 whisker testing. It is rated for operation from -65 °C to +185 °C and validated for high-temperature operating life, thermal cycling, and mechanical shock per automotive standards.
What does the "HE3" suffix mean in 1.5KA11HE3/51?
The HE3 suffix in 1.5KA11HE3/51 denotes RoHS-compliant, high-reliability automotive grade construction: matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and passing JESD201 Class 2 tin whisker testing. It also indicates qualification to AEC-Q101 and UL 94 V-0 flammability rating.
What is the clamping voltage of 1.5KA11HE3/51 under maximum surge current?
At its rated peak pulse current of 92.6 A (10/1000 µs waveform), the 1.5KA11HE3/51 clamps to a maximum of 16.2 V. This value is specified in the Electrical Characteristics table of Vishay Document 88300 and defines the upper voltage limit imposed on protected circuits during worst-case surge events.
Can 1.5KA11HE3/51 be used in bidirectional configurations?
No, 1.5KA11HE3/51 is unidirectional only, as confirmed in the FEATURES section of the datasheet. It conducts in reverse bias during overvoltage events and blocks forward current like a standard diode. For bidirectional protection, a separate part number (e.g., 1.5KA11CA) would be required - not applicable to 1.5KA11HE3/51.
1.5KA11HE3/51 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):
- 8.92V
- Voltage - Breakdown (Min):
- 9.9V
- Voltage - Clamping (Max) @ Ipp:
- 16.2V
- Current - Peak Pulse (10/1000µs):
- 92.6A
- 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
1.5KA11HE3/51 FAQ
1.How can I place an order for 1.5KA11HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA11HE3/51 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 1.5KA11HE3/51 reliable?
The price and inventory of 1.5KA11HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA11HE3/51 is usually 5 days.
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Once your 1.5KA11HE3/51 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 1.5KA11HE3/51?
For technical support, including 1.5KA11HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA11HE3/51 requirements.
6.How does Aetrix verify that 1.5KA11HE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA11HE3/51 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 1.5KA11HE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA11HE3/51?
All 1.5KA11HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA11HE3/51, 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 1.5KA11HE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA11HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA11HE3/51 Tags
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