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Vishay General Semiconductor - Diodes Division 1.5KE33CA/54
- Part No.:
- 1.5KE33CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33CA/54.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,449
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Product details
Overview
1.5KE33CA/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33 V breakdown voltage (VBR min/max: 31.4–34.7 V), 28.2 V standoff voltage (VWM), 45.7 V clamping voltage at 32.8 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE33CA/54 datasheet, 1.5KE33CA/54 pinout, 1.5KE33CA/54 application, or 1.5KE33CA/54 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package dimensions, thermal derating curves, and AEC-Q101-qualified alternatives - all confirmed from Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional construction. Its 1500 W peak pulse power rating is defined per 10/1000 µs waveform at TA = 25 °C, with thermal resistance RθJA = 75 °C/W and RθJL = 15.4 °C/W enabling effective transient energy dissipation without external heatsinking in typical PCB layouts.
The 1.5KE33CA/54 exhibits fast response time (~1 ns), low incremental surge resistance, and stable temperature coefficient of VBR (0.098 %/°C). It supports repetitive surge duty cycles up to 0.01 % and complies with JESD 22-B106 soldering (275 °C max, 10 s), making it suitable for automated assembly in automotive-grade production environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V - ensures reliable avalanche conduction onset within tight tolerance across temperature and unit variation |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA, defining safe working margin |
| VC @ IPPM | 45.7 V at 32.8 A - clamping voltage during full 1500 W transient, limiting downstream IC stress to safe levels |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, sufficient for IEC 61000-4-5 Level 4 surges |
| TJ range | −55 °C to +175 °C - wide junction temperature range enables operation in under-hood automotive and industrial environments |
| Leakage ID | 1.0 µA at VWM - ultra-low standby current preserves system power integrity in always-on circuits |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded package with UL 94 V-0 flammability rating |
Pinout & Package
1.5KE33CA/54 uses the standard DO-201AD axial package (Case Style 1.5KE), with no polarity marking on the body - consistent with bidirectional TVS construction. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | No functional distinction between leads; either terminal serves as input/output for transient suppression in AC or floating DC paths |
| Lead 1 / Lead 2 | Current-carrying path to junction | Both leads conduct equally during positive/negative transients; thermal path optimized via RθJL = 15.4 °C/W to lead |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 4 kV open-circuit / 2 kA short-circuit without degradation |
| Clamping response time ~1 ns | Engages before sensitive logic or analog circuitry sustains damage from ESD or lightning-induced transients |
| AEC-Q101 qualified (HE3 variants) | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical protection and environmental sealing in harsh industrial enclosures |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or supply rail to shunt surge energy to ground. Use Value: Limits transient voltage to ≤45.7 V during 32.8 A surges, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against induced surges from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point to clamp common-mode transients before they reach isolation barriers or microcontrollers. Use Value: Maintains 28.2 V working voltage margin while clamping 1500 W spikes - compatible with 24 V DC industrial power rails. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Front-end surge protection for Ethernet PHYs and DSL line drivers exposed to lightning-induced surges on outdoor copper lines. IC Role / Device Role / Timing Role: Primary-level TVS in series with gas discharge tube (GDT) for coordinated multi-stage protection architecture. Use Value: Fast 1 ns response captures initial surge edge; 45.7 V clamping prevents damage to 3.3 V PHY receivers during 10/1000 µs transients. |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters to protect downstream USB-PD controllers and battery management ICs. IC Role / Device Role / Timing Role: Clamp diode across DC output rail to absorb residual transients escaping primary-side MOVs and Y-capacitors. Use Value: 33 V nominal breakdown aligns with 5 V/12 V/20 V USB-PD profiles; 1.0 µA leakage avoids standby power penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | DO-214AA package (SMB), lower PPPM = 600 W, same VBR range (31.4–34.7 V), higher IPPM = 17.3 A | Surface-mount footprint; suited for space-constrained consumer electronics, not high-energy industrial surges | Select when board area is limited and surge energy does not exceed 600 W - verify layout thermal relief for SMB package |
| 1.5KE33CAHE3_B | Identical electrical specs and DO-201AD package; AEC-Q101 qualified, RoHS-compliant, JESD 201 Class 2 whisker-tested leads | Qualified for automotive under-hood use; requires traceable sourcing and PPAP documentation | Choose for automotive OEM programs requiring AEC-Q101 validation and extended reliability testing - same pinout, no PCB change |
Compared with 1.5KE33CA/54, SMBJ33CA offers SMT compatibility but reduced surge capacity, while 1.5KE33CAHE3_B provides identical performance with automotive qualification - enabling direct drop-in replacement where AEC-Q101 compliance is mandatory.
Availability
1.5KE33CA/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer power adapter designs requiring stable component supply and documented surge performance.
Supply support for 1.5KE33CA/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where robustness against lightning, ESD, and inductive switching surges is critical.
FAQ
What is the breakdown voltage tolerance of the 1.5KE33CA/54?
The 1.5KE33CA/54 has a specified breakdown voltage range of 31.4 V to 34.7 V at 1.0 mA test current (IT), corresponding to ±5.2 % tolerance around the nominal 33 V rating. This tight VBR window ensures consistent clamping behavior across production lots and temperature extremes, as confirmed in Vishay Document #88301 Table on page 2.
Is the 1.5KE33CA/54 suitable for automotive applications?
The base 1.5KE33CA/54 is commercial-grade; however, the functionally identical 1.5KE33CAHE3_B variant is AEC-Q101 qualified and approved for automotive under-hood use. For automotive deployment, engineers should specify the HE3_B suffix version - it shares identical electrical specs, DO-201AD package, and pinout with the 1.5KE33CA/54 but adds automotive reliability validation.
What is the clamping voltage of the 1.5KE33CA/54 at rated peak pulse current?
The 1.5KE33CA/54 clamps to a maximum of 45.7 V at its rated peak pulse current of 32.8 A (IPPM), measured using the standard 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does the 1.5KE33CA/54 have polarity markings on the package?
No - the 1.5KE33CA/54 is a bidirectional TVS diode and carries no cathode band or other polarity marking on its molded epoxy body. Both leads are functionally identical, allowing installation in either orientation across AC-coupled or floating DC signal paths without concern for directionality.
What is the thermal resistance of the 1.5KE33CA/54 package?
The 1.5KE33CA/54 exhibits a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15.4 °C/W, per Vishay Document #88301 page 3. These values enable effective heat dissipation through PCB copper pours or direct lead routing, supporting reliable operation at full 1500 W pulse ratings in standard FR-4 layouts.
1.5KE33CA/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE33CA/54 FAQ
1.How can I place an order for 1.5KE33CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33CA/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 1.5KE33CA/54 reliable?
The price and inventory of 1.5KE33CA/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33CA/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE33CA/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33CA/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33CA/54?
1.5KE33CA/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33CA/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 1.5KE33CA/54?
For technical support, including 1.5KE33CA/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33CA/54 requirements.
6.How does Aetrix verify that 1.5KE33CA/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE33CA/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 1.5KE33CA/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE33CA/54?
All 1.5KE33CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33CA/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 1.5KE33CA/54 part is unused and in its original packaging.
Return procedure for 1.5KE33CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33CA/54 Tags
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