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Vishay General Semiconductor - Diodes Division 1.5KA33HE3/54
- Part No.:
- 1.5KA33HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA33HE3/54.pdf
- Description:
- TVS DIODE 26.8VWM 47.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,854
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Product details
Overview
1.5KA33HE3/54 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 47.7 V under 31.4 A peak pulse current, and operates up to +185 °C junction temperature - enabling robust protection of MOSFETs and sensor signal lines in automotive powertrain and body control modules.
For engineers reviewing the 1.5KA33HE3/54 datasheet, 1.5KA33HE3/54 pinout, 1.5KA33HE3/54 application, or 1.5KA33HE3/54 equivalent, key selection criteria include its AEC Q101 qualification, 29.7–36.3 V breakdown range, low 0.098 %/°C VBR tempco, and RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance.
Technical Context
The 1.5KA33HE3/54 employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and maintains reliable operation across -65 °C to +185 °C. Its unidirectional polarity and 26.8 V stand-off voltage enable integration into DC power rails where reverse conduction must be blocked while suppressing positive transients.
It meets ANSI/IEEE C62.35 standards for transient suppression, features 3.5 V max forward voltage at 100 A, and exhibits low incremental surge resistance - critical for minimizing voltage overshoot during fast-rising inductive switch-offs in automotive 12 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges from load dump or inductive kickback without failure |
| Breakdown Voltage VBR | 29.7–36.3 V at 1 mA - defines precise clamping onset threshold for 33 V nominal systems |
| Clamping Voltage VC | 47.7 V at 31.4 A IPPM - limits maximum voltage seen by protected ICs during worst-case surge |
| Stand-off Voltage VWM | 26.8 V - ensures no conduction during normal 33 V rail operation, avoiding leakage-related power loss |
| Junction Temperature Range | -65 °C to +185 °C - supports under-hood deployment in automotive engine control units |
| Surge Current IPPM | 31.4 A - quantifies maximum transient current the device can shunt before exceeding VC |
| Tempco of VBR | 0.098 %/°C - ensures predictable voltage shift over temperature, critical for margin-critical designs |
Pinout & Package
Case Style 1.5KA: axial-lead DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body, cathode indicated by color band. Leads meet J-STD-002 and JESD22-B102 solderability; HE3 suffix confirms JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to system ground or low-side return path; enables unidirectional clamping of positive transients |
| Cathode | Current exit during reverse-biased clamping | Connected to protected line (e.g., 33 V rail); conducts only when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance over 1000+ surge events without parameter drift |
| AEC Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2b (inductive switching) waveforms |
| Low 3.5 V VF at 100 A | Minimizes forward conduction loss during high-current surge events, reducing thermal stress |
| RoHS-compliant HE3 packaging | Meets automotive supply chain requirements with JESD201 Class 2 tin whisker mitigation |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Stage |
|---|---|
|
Use Scenario: Protecting microcontroller I/O and gate drivers from inductive kickback during solenoid and fuel injector switching. IC Role / Device Role: Unidirectional TVS placed between 33 V supply rail and ground to clamp positive transients above 26.8 V. Use Value: Prevents latch-up or permanent damage to 33 V-rated MCUs and MOSFET drivers during repeated 12 V system switching events. |
Use Scenario: Safeguarding gate driver ICs and current-sense amplifiers against voltage spikes from IGBT turn-off in 3-phase inverters. IC Role / Device Role: Mounted across DC bus rails to suppress commutation spikes up to 1500 W without derating at +125 °C ambient. Use Value: Maintains signal integrity on isolated analog feedback paths by limiting transient excursions to ≤47.7 V. |
| Automotive Body Control Module (BCM) | Telecom Power Supply Input Stage |
|
Use Scenario: Shielding LIN bus transceivers and LED driver ICs from battery voltage transients during jump-start or alternator regulation faults. IC Role / Device Role: Connected between 33 V auxiliary rail and chassis ground to absorb ISO 16750-2 load dump energy. Use Value: Enables compliance with automotive EMC requirements while supporting extended temperature operation up to +185 °C junction. |
Use Scenario: Front-end protection for AC/DC rectifier outputs subjected to lightning-induced surges on telecom central office power feeds. IC Role / Device Role: Placed after bulk capacitance to clamp residual transients that bypass MOV-based primary protection. Use Value: Provides secondary clamping with precise 26.8 V standoff, preventing false triggering of downstream overvoltage protection circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3/52 | Lower 600 W PPPM rating; SMA package; bidirectional option available | Better suited for space-constrained PCBs but insufficient for full ISO 7637-2 Pulse 5a compliance | Select when board area is limited and surge energy is below 600 W; verify clamping margin at 31.4 A |
| 1.5KE33A | Same 1500 W rating but non-automotive grade; 175 °C max TJ; no AEC Q101 qualification | Lacks automotive reliability validation; higher VBR tolerance (±10 % vs. ±5 % for 1.5KA33HE3/54) | Acceptable for industrial use where AEC Q101 is not mandated; avoid in safety-critical automotive zones |
Compared with SMBJ33AHE3/52 and 1.5KE33A, the 1.5KA33HE3/54 uniquely combines AEC Q101 qualification, +185 °C operation, and tight ±5 % VBR tolerance - making it the only choice for under-hood automotive applications requiring full load-dump immunity and long-term reliability.
Availability
1.5KA33HE3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom power supply prototyping requiring stable component supply and traceable sourcing.
Supply support for 1.5KA33HE3/54 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, and passive components for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC Q101-compliant transient suppression in automotive power systems, emphasizing high-temperature stability, repeatable clamping, and long-term surge endurance under real-world vehicle conditions.
FAQ
What is the exact breakdown voltage range for the 1.5KA33HE3/54?
The 1.5KA33HE3/54 has a guaranteed breakdown voltage (VBR) range of 29.7 V to 36.3 V at 1 mA test current, per Vishay Document 88300 Rev. 20-Oct-08. This ±10 % tolerance ensures reliable clamping onset for 33 V nominal systems while accommodating manufacturing variation and temperature drift.
Is the 1.5KA33HE3/54 unidirectional or bidirectional?
The 1.5KA33HE3/54 is unidirectional only, as explicitly stated in the Vishay datasheet. Its cathode is marked by a color band, and it conducts only during positive transients relative to ground - making it suitable for DC rail protection where reverse conduction must be blocked.
Does the 1.5KA33HE3/54 meet AEC Q101 qualification?
Yes, the 1.5KA33HE3/54 is AEC Q101 qualified, confirmed in the "Mechanical Data" section of Vishay Document 88300. The HE3 suffix denotes high-reliability, automotive-grade construction validated for temperature cycling, humidity bias, and mechanical shock per AEC Q101 requirements.
What is the maximum clamping voltage of the 1.5KA33HE3/54 under surge conditions?
The 1.5KA33HE3/54 clamps to a maximum of 47.7 V at its rated peak pulse current of 31.4 A (10/1000 µs waveform), as specified in the Electrical Characteristics table. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
What package type does the 1.5KA33HE3/54 use, and what are its key mechanical features?
The 1.5KA33HE3/54 uses the Case Style 1.5KA (DO-201AD) axial-leaded package: UL 94 V-0 molded epoxy body, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and cathode identification via color band. The HE3 suffix confirms JESD201 Class 2 whisker resistance.
1.5KA33HE3/54 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):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- Current - Peak Pulse (10/1000µs):
- 31.4A
- 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
1.5KA33HE3/54 FAQ
1.How can I place an order for 1.5KA33HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA33HE3/54 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 1.5KA33HE3/54 reliable?
The price and inventory of 1.5KA33HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA33HE3/54 is usually 5 days.
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Once your 1.5KA33HE3/54 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 1.5KA33HE3/54?
For technical support, including 1.5KA33HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA33HE3/54 requirements.
6.How does Aetrix verify that 1.5KA33HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA33HE3/54 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 1.5KA33HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA33HE3/54?
All 1.5KA33HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA33HE3/54, 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 1.5KA33HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA33HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA33HE3/54 Tags
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