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Vishay General Semiconductor - Diodes Division 1.5KA33AHE3/54
- Part No.:
- 1.5KA33AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA33AHE3/54.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,693
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Product details
Overview
1.5KA33AHE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode with 1500 W peak pulse power (10/1000 µs), 31.4 V breakdown voltage (min), 45.7 V clamping voltage at 32.8 A, and AEC-Q101 qualification for under-hood electronics protection.
For engineers reviewing the 1.5KA33AHE3/54 datasheet, 1.5KA33AHE3/54 pinout, 1.5KA33AHE3/54 application, or 1.5KA33AHE3/54 equivalent, this part delivers high-temperature stability up to +185 °C junction, low incremental surge resistance, and RoHS-compliant matte tin-plated leads validated per J-STD-002 and JESD22-B102.
Technical Context
This TVS diode uses patented PAR® construction for robust surge handling and stable clamping under repetitive transients. Its unidirectional polarity and 1.0 µA max reverse leakage at 28.2 V stand-off voltage support precise overvoltage protection in DC-biased signal and power lines.
Designed for automotive environments, it operates across –65 °C to +185 °C, features UL 94 V-0 molded epoxy packaging, and meets JESD201 Class 2 whisker resistance - enabling reliable deployment in engine control units, sensor interfaces, and infotainment power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients from load dump or inductive switching without degradation |
| Breakdown Voltage VBR (min/max) | 31.4 V / 34.7 V - defines precise voltage threshold for avalanche conduction onset |
| Clamping Voltage VC at IPPM | 45.7 V at 32.8 A - limits downstream voltage stress during worst-case surge events |
| Stand-off Voltage VWM | 28.2 V - ensures no conduction during normal 24 V automotive system operation |
| Operating Temperature Range | –65 °C to +185 °C - supports placement near engines or in sealed ECU enclosures |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability including temperature cycling, HTRB, and surge life testing |
| RoHS & WEEE Compliant | Yes - HE3 suffix denotes lead-free, high-reliability, automotive-grade construction |
Pinout & Package
Package: Case Style 1.5KA - axial-leaded, molded epoxy body with UL 94 V-0 rating; cathode denoted by color band; lead length 0.375" (9.5 mm); weight 0.916 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected circuit ground or low-side return path |
| Cathode | Current exit point during avalanche clamping | Connected to protected line (e.g., 24 V supply or signal rail) - color-banded end |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables uniform current distribution across junction area, minimizing hot-spot formation during 1500 W surges |
| 10/1000 µs waveform capability | Validated for ISO 7637-2 Pulse 1, 2a, 3a/b, and SAE J1113-11 load-dump immunity testing |
| Low incremental surge resistance | Reduces VC overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, critical for long-life automotive modules |
| Solder dip 260 °C, 40 s | Supports standard reflow and wave-solder processes without package delamination or parameter shift |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects 24 V supply rail of diesel/gasoline ECUs against load dump transients up to ±120 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive surges while blocking reverse leakage during normal operation. Use Value: Maintains VWM = 28.2 V margin below nominal 24 V system, ensuring zero false triggering during cranking or alternator regulation. | Use Scenario: Shields analog outputs of pressure/temperature sensors from ESD and inductive kickback in chassis harnesses. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) avalanche device shunts transients before IC input structures fail. Use Value: Clamps to ≤45.7 V within 1 ns, preserving signal integrity for 12-bit ADC front-ends operating at ±5 V full scale. |
| Infotainment Head Unit USB Power Rail | Body Control Module (BCM) LIN Bus Line |
Use Scenario: Guards 5 V USB charging port in head units against battery backup switching transients and hot-swap spikes. IC Role / Device Role / Timing Role: Stand-off voltage of 28.2 V prevents conduction on 5 V rail; clamps only during >31.4 V faults. Use Value: Enables use without series impedance - direct placement between VBUS and GND preserves USB 2.0 signal integrity. | Use Scenario: Protects LIN transceiver I/O pins from cable discharge events and antenna-coupled RF noise in door modules. IC Role / Device Role / Timing Role: Low capacitance (<100 pF at 0 V) avoids signal edge degradation on 19.2 kbaud bus. Use Value: Delivers <1.0 µA leakage at 12 V, preventing false wake-up or bus contention in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5BT | 600 W PPPM, SMA package, 36.7 V VBR min, 53.3 V VC at 11.3 A | Lower power rating and higher clamping voltage limit suitability to consumer-grade 12 V systems only | Select when board space is constrained and surge energy is limited to ISO 7637-2 Pulse 3a/b |
| 1.5KE33CA | Bi-directional, 1500 W, DO-201 package, 33.2 V VBR, 53.3 V VC at 28.2 A | Bi-directional conduction unsuitable for DC-biased rails requiring unidirectional blocking | Choose only for AC-coupled or dual-polarity signal lines where reverse surge protection is required |
Compared with SMAJ33A-E3/5BT and 1.5KE33CA, the 1.5KA33AHE3/54 provides superior clamping performance (45.7 V vs. ≥53.3 V), AEC-Q101 qualification, and axial-leaded mechanical robustness for high-vibration under-hood mounting - making it the preferred choice for automotive power rail protection.
Availability
1.5KA33AHE3/54 is available at Aetrix Electronics and suitable for engine control units, automotive sensor interfaces, infotainment power supplies, and body control module designs requiring stable component supply and automotive-grade reliability.
Supply support for 1.5KA33AHE3/54 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability and automotive applications.
The 1.5KA series was engineered specifically for harsh-environment transient suppression in automotive power systems, targeting AEC-Q101 compliance, extended temperature operation, and repeatable clamping performance across production lots.
FAQ
What is the maximum clamping voltage of the 1.5KA33AHE3/54 under rated surge conditions?
The 1.5KA33AHE3/54 has a maximum clamping voltage (VC) of 45.7 V at its rated peak pulse current (IPPM) of 32.8 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and reflects the actual voltage seen by protected circuitry during worst-case transients. The 1.5KA33AHE3/54 maintains this clamping performance due to its patented PAR® construction and low incremental surge resistance.
Is the 1.5KA33AHE3/54 suitable for 24 V automotive systems?
Yes, the 1.5KA33AHE3/54 is explicitly designed for 24 V automotive systems. Its 28.2 V stand-off voltage (VWM) provides a safe margin above nominal 24 V operation, while its 31.4–34.7 V breakdown range ensures reliable activation during load dump events. The 1.5KA33AHE3/54 is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it appropriate for under-hood deployment in trucks, buses, and commercial vehicles.
Does the 1.5KA33AHE3/54 have a unidirectional or bi-directional configuration?
The 1.5KA33AHE3/54 is a unidirectional TVS diode, as confirmed by Vishay's datasheet Document Number 88300. It conducts only during positive voltage transients relative to its cathode terminal and blocks reverse current under normal bias. This configuration is ideal for protecting DC power rails and unidirectionally biased signal lines. The cathode is marked by a color band on the 1.5KA33AHE3/54 package body.
What packaging and reel format is supplied for the 1.5KA33AHE3/54?
The 1.5KA33AHE3/54 is supplied in 13" diameter paper tape and reel format with a base quantity of 1400 units per reel, per Vishay's ordering information. The "HE3/54" suffix indicates RoHS-compliant, high-reliability construction with JESD201 Class 2 whisker resistance and a preferred package code of "54". Lead finish is matte tin, solderable per J-STD-002 and JESD22-B102.
How does the 1.5KA33AHE3/54 compare to standard 1.5KE series TVS diodes?
The 1.5KA33AHE3/54 differs from the 1.5KE series in polarity (unidirectional vs. bi-directional), qualification (AEC-Q101 vs. commercial grade), and construction (PAR® vs. standard junction). It offers lower clamping voltage (45.7 V vs. ≥53.3 V), tighter VBR tolerance, and enhanced high-temperature stability. These attributes make the 1.5KA33AHE3/54 suitable for mission-critical automotive applications where the 1.5KE33CA would not meet reliability or performance requirements.
1.5KA33AHE3/54 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- 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
1.5KA33AHE3/54 FAQ
1.How can I place an order for 1.5KA33AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA33AHE3/54 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 1.5KA33AHE3/54 reliable?
The price and inventory of 1.5KA33AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA33AHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA33AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA33AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA33AHE3/54?
1.5KA33AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA33AHE3/54 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 1.5KA33AHE3/54?
For technical support, including 1.5KA33AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA33AHE3/54 requirements.
6.How does Aetrix verify that 1.5KA33AHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA33AHE3/54 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 1.5KA33AHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA33AHE3/54?
All 1.5KA33AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA33AHE3/54, 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 1.5KA33AHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA33AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA33AHE3/54 Tags
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