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Vishay General Semiconductor - Diodes Division 1.5KE33CA-E3/54
- Part No.:
- 1.5KE33CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33CA-E3/54.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,511
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Product details
Overview
1.5KE33CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal and power lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), and clamps to ≤45.7 V at 32.8 A, protecting sensitive ICs and MOSFETs in automotive and industrial interfaces.
For engineers reviewing the 1.5KE33CA-E3/54 datasheet, 1.5KE33CA-E3/54 pinout, 1.5KE33CA-E3/54 application, or 1.5KE33CA-E3/54 equivalent, this device delivers verified bidirectional surge suppression with glass-passivated junction reliability, AEC-Q101 qualification eligibility (HE3 variant), and UL 94 V-0 molded epoxy packaging - critical for ESD/lightning transient hardening in sensor signal chains and DC bus protection.
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its 10/1000 µs waveform rating supports high-energy lightning-induced surges per IEC 61000-4-5 Level 4, while low incremental clamping resistance ensures minimal overshoot during fast transients.
The device uses a silicon planar junction structure with glass passivation for stable leakage performance (<1.0 µA at 28.2 V) and thermal robustness up to 175 °C junction temperature. Its 75 °C/W junction-to-ambient thermal resistance and 15.4 °C/W junction-to-lead resistance support reliable operation under repetitive surge conditions when mounted on PCB copper pours or leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 28.2 V - maximum continuous working voltage before leakage exceeds 1.0 µA; sets safe operating margin below breakdown |
| VC @ IPPM | ≤45.7 V at 32.8 A - actual clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity compliant with IEC 61000-4-5 and ISO 7637-2 |
| IFSM | N/A - unidirectional only; not applicable for 1.5KE33CA-E3/54 as a bidirectional device |
| TJ range | −55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 rated epoxy body |
Pinout & Package
1.5KE33CA-E3/54 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package with no polarity marking - consistent with bidirectional TVS construction. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and qualified for solder dip at 275 °C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional conduction path | No functional distinction between terminals; either lead connects to protected line or ground - simplifies PCB layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable reverse leakage (<1.0 µA at VWM) and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive electronics |
| Fast response time (~1 ns) | Clamps transients before they propagate into IC inputs, preventing latch-up or gate oxide damage in MOSFETs and microcontrollers |
| UL 94 V-0 epoxy molding | Provides flame-retardant mechanical encapsulation suitable for safety-critical applications including EV charging interfaces |
| AEC-Q101 qualification option (HE3 variant) | Enables direct use in automotive subsystems requiring validated reliability for engine control, ADAS sensors, and infotainment power rails |
Applications
| Automotive Sensor Signal Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or single-ended sensor output to ground. Use Value: Limits transient voltage to ≤45.7 V, preserving integrity of 3.3 V/5 V ADC front-ends and isolating fault energy from MCU I/O pins. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field wiring surges and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Withstands 1500 W surges without degradation, maintaining signal accuracy and eliminating need for redundant protection stages. |
| Telecom Power Line Surge Suppression | Consumer Device USB/DC Jack Protection |
Use Scenario: Front-end protection of PoE-powered Ethernet switches and remote radio units exposed to lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Parallel-connected TVS on DC input rail upstream of DC-DC converters and hot-swap controllers. Use Value: Clamps 10/1000 µs surges to <46 V, preventing overvoltage shutdown of 48 V nominal power supplies and ensuring system uptime. |
Use Scenario: Input-stage transient protection for USB-C PD adapters and wall-mounted chargers subjected to user-handling ESD and mains coupling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp across VBUS and GND at connector entry point. Use Value: Delivers sub-1 ns response and 45.7 V clamping, meeting IEC 61000-4-2 Level 4 (±15 kV contact) without distorting high-speed USB signaling. |
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 (SMB) surface-mount package; same 33 V VBR, 1500 W rating, but lower IPPM (33.1 A) and higher VC (53.3 V) | Designed for space-constrained PCBs where through-hole mounting is impractical; less effective clamping margin than 1.5KE33CA-E3/54 | Select SMBJ33CA when board real estate is limited and thermal management via copper pour is feasible; verify VC margin against downstream component ratings. |
| 1.5SMC33CA | DO-214AB (SMC) package; identical electrical specs but higher thermal resistance (RθJA = 110 °C/W vs. 75 °C/W) and lower surge repetition tolerance | Better suited for low-duty-cycle consumer applications; not recommended for automotive or industrial environments with frequent transients | Choose 1.5SMC33CA only for cost-sensitive, non-automotive designs with infrequent surge exposure; avoid in AEC-Q101 or IEC 61000-4-5 Level 4 deployments. |
Compared with SMBJ33CA and 1.5SMC33CA, the 1.5KE33CA-E3/54 offers superior thermal dissipation (75 °C/W), tighter clamping (45.7 V), and proven ruggedness in axial-leaded high-reliability applications - making it the preferred choice for automotive, industrial, and telecom infrastructure where surge repetition and ambient temperature extremes are critical.
Availability
1.5KE33CA-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom power line protection, and consumer USB/DC jack hardening requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE33CA-E3/54 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, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where failure modes must be mitigated without compromising signal integrity or thermal stability.
FAQ
What is the breakdown voltage tolerance for 1.5KE33CA-E3/54?
The 1.5KE33CA-E3/54 has a specified breakdown voltage range of 31.4 V to 34.7 V at a test current of 1.0 mA, representing a ±5% tolerance around the nominal 33 V rating. This tight VBR window ensures predictable clamping behavior across manufacturing lots and temperature ranges, critical for compliance with IEC 61000-4-5 surge immunity thresholds. The device maintains this specification under standard test conditions (TA = 25 °C).
Is 1.5KE33CA-E3/54 RoHS compliant and halogen-free?
Yes, the 1.5KE33CA-E3/54 carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and halogen-free status per IEC 61249-2-21. The epoxy molding compound meets UL 94 V-0 flammability requirements, and the matte tin-plated leads satisfy J-STD-002 solderability standards. Material declarations are available upon request from Vishay's compliance portal.
Does 1.5KE33CA-E3/54 have AEC-Q101 qualification?
The base 1.5KE33CA-E3/54 is commercial-grade; however, the variant 1.5KE33CAHE3_B is explicitly AEC-Q101 qualified per Vishay documentation (Document 88301, Note 2). This qualification covers temperature cycling, humidity bias, and surge endurance testing required for automotive under-hood and chassis applications. Customers requiring AEC-Q101 must specify the HE3_B suffix version.
What is the maximum clamping voltage of 1.5KE33CA-E3/54 at rated peak pulse current?
The 1.5KE33CA-E3/54 clamps to a maximum of 45.7 V at its rated peak pulse current of 32.8 A (10/1000 µs waveform). This value is measured per JEDEC standard test conditions and represents the worst-case voltage seen by downstream circuitry during a full-rated surge event. It provides a 12.5 V margin below the typical 58 V absolute maximum rating of many 3.3 V/5 V interface ICs.
Can 1.5KE33CA-E3/54 be used in parallel for higher surge current handling?
Yes, multiple 1.5KE33CA-E3/54 devices can be paralleled to increase total peak pulse current capacity, provided matched units are used and PCB layout ensures equal current sharing (e.g., symmetrical trace lengths, shared thermal plane). Vishay confirms this configuration in Application Note AN91000, noting that derating by 10–15% per additional device is recommended to account for parameter spread and thermal coupling.
1.5KE33CA-E3/54 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:
- Active
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE33CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33CA-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE33CA-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE33CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33CA-E3/54?
1.5KE33CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33CA-E3/54 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-E3/54?
For technical support, including 1.5KE33CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE33CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE33CA-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE33CA-E3/54?
All 1.5KE33CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33CA-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE33CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33CA-E3/54 Tags
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