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Vishay General Semiconductor - Diodes Division 1.5KA18HE3/54
- Part No.:
- 1.5KA18HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA18HE3/54.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,748
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Product details
Overview
1.5KA18HE3/54 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 26.5 V under 56.6 A peak pulse current, and operates up to +185 °C junction temperature - ideal for protecting MOSFETs and sensor signal lines in automotive powertrain control modules.
For engineers reviewing the 1.5KA18HE3/54 datasheet, 1.5KA18HE3/54 pinout, 1.5KA18HE3/54 application, or 1.5KA18HE3/54 equivalent, key selection criteria include its AEC-Q101 qualification, 16.2–19.8 V breakdown range, low 0.088 %/°C VBR tempco, and RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and high-temperature operation. Its unidirectional polarity, 1.5 kW surge rating, and 26.5 V max clamping voltage at 56.6 A enable robust protection of 12 V automotive electronics against load dump and inductive switching transients.
The device features a molded epoxy case rated UL 94 V-0, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and a cathode-indicating color band. It is specified for -65 °C to +185 °C operating and storage temperature range, with derating applied above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges common in automotive load-dump events |
| Breakdown Voltage (VBR) | 16.2–19.8 V at 1 mA - defines precise voltage threshold for avalanche conduction onset |
| Clamping Voltage (VC) | 26.5 V at 56.6 A IPPM - limits protected circuit voltage during full-rated surge |
| Stand-off Voltage (VWM) | 14.5 V - maximum continuous reverse voltage before leakage exceeds 1 µA |
| Junction Temp. Range | -65 °C to +185 °C - supports under-hood deployment without thermal derating loss |
| Tempco of VBR | 0.088 %/°C - ensures predictable voltage shift over temperature for stable protection margin |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including HTOL, TC, and HAST testing |
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 | Forward current entry / surge return path | Connected to ground or low-impedance return in unidirectional TVS configuration |
| Cathode | Avalanche conduction node / protected line connection | Connected to line being protected (e.g., sensor supply or CAN bus); color-banded end |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable clamping performance across 1000+ surge cycles without parameter drift |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems |
| HE3 suffix compliance | Meets JESD201 Class 2 whisker resistance - critical for long-life automotive solder joints |
| 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 |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V supply rail of engine control units against ISO 7637-2 Pulse 5a load dump transients up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC/DC converter input stage. Use Value: Limits voltage to ≤26.5 V during 1500 W surge, preventing damage to downstream PMICs and microcontrollers. | Use Scenario: Safeguarding analog output lines of pressure/temperature sensors exposed to inductive switching noise in transmission control modules. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor harness connector, shunting transients to chassis ground. Use Value: Clamps fast ESD and switching spikes below IC absolute maximum ratings while maintaining <1 µA leakage at 14.5 V nominal. |
| Body Control Module (BCM) LIN Bus Protection | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Shielding LIN transceiver I/O pins from coupled transients on shared vehicle harnesses. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed directly at connector interface before LIN driver IC. Use Value: Provides 26.5 V clamping without distorting LIN waveform integrity due to minimal parasitic capacitance. | Use Scenario: Protecting high-side MOSFET gates and bootstrap circuits in EPS motor drivers from gate-oxide damaging spikes. IC Role / Device Role / Timing Role: TVS mounted across gate-source terminals or between bootstrap rail and ground. Use Value: Absorbs 56.6 A surge current within 10/1000 µs, preventing gate rupture while surviving repeated thermal cycling to +185 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18AHE3/52 | Lower 600 W peak power; SMC package; bidirectional option available | Not AEC-Q101 qualified; suited for non-automotive industrial use | Select when cost sensitivity outweighs automotive qualification and surge energy demands |
| 1.5KE18A | Same VBR range but legacy DO-201 package; no HE3 whisker rating; 1500 W rating at 25 °C only | Lacks high-temp stability beyond 125 °C; not qualified to AEC-Q101 | Choose only for legacy designs where footprint compatibility with DO-201 is mandatory |
Compared with SMBJ18AHE3/52 and 1.5KE18A, the 1.5KA18HE3/54 provides higher temperature resilience (+185 °C vs. +150 °C), guaranteed AEC-Q101 compliance, and superior long-term whisker resistance - making it the sole choice for new automotive powertrain and chassis applications requiring sustained reliability.
Availability
1.5KA18HE3/54 is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics protection, and electric power steering systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1.5KA18HE3/54 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 is engineered specifically for automotive transient suppression, emphasizing AEC-Q101 qualification, high-temperature stability, and robust surge handling in under-hood environments.
FAQ
What is the exact breakdown voltage range for the 1.5KA18HE3/54?
The 1.5KA18HE3/54 has a specified breakdown voltage (VBR) range of 16.2 V to 19.8 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable avalanche initiation across manufacturing lot variation and temperature extremes, supporting consistent clamping behavior in automotive 12 V systems.
Is the 1.5KA18HE3/54 unidirectional or bidirectional?
The 1.5KA18HE3/54 is unidirectional only, as confirmed in the Vishay datasheet Document Number 88300. Its polarity is marked by a cathode band, and it is intended for DC-biased protection applications such as power rail and signal line clamping where reverse conduction must be blocked.
Does the 1.5KA18HE3/54 meet AEC-Q101 requirements?
Yes, the 1.5KA18HE3/54 is explicitly AEC-Q101 qualified, as noted in the "Notes" section of the datasheet (page 3). This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress test (HAST), validating its suitability for automotive powertrain and chassis applications.
What is the maximum clamping voltage of the 1.5KA18HE3/54 under full-rated surge?
The 1.5KA18HE3/54 exhibits a maximum clamping voltage (VC) of 26.5 V at 56.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of the datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
What does the "HE3/54" suffix indicate in 1.5KA18HE3/54?
The "HE3" suffix denotes RoHS-compliant, high-reliability, automotive-grade construction meeting JESD201 Class 2 whisker resistance, while "/54" specifies the preferred packaging code: 13" diameter paper tape and reel, 1400 units per reel. Both identifiers are defined in the Ordering Information section (page 3) of the Vishay datasheet.
1.5KA18HE3/54 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):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 56.6A
- 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
1.5KA18HE3/54 FAQ
1.How can I place an order for 1.5KA18HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA18HE3/54 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 1.5KA18HE3/54 reliable?
The price and inventory of 1.5KA18HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA18HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA18HE3/54?
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4.How is shipping managed for 1.5KA18HE3/54?
1.5KA18HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA18HE3/54 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 1.5KA18HE3/54?
For technical support, including 1.5KA18HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA18HE3/54 requirements.
6.How does Aetrix verify that 1.5KA18HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA18HE3/54 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 1.5KA18HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA18HE3/54?
All 1.5KA18HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA18HE3/54, 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 1.5KA18HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA18HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA18HE3/54 Tags
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