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Vishay General Semiconductor - Diodes Division 1.5KE33C-E3/54
- Part No.:
- 1.5KE33C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33C-E3/54.pdf
- Description:
- TVS DIODE 26.8VWM 47.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,787
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Product details
Overview
1.5KE33C-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on power and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1.0 mA), 45.7 V maximum clamping voltage at 32.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5KE33C-E3/54 datasheet, 1.5KE33C-E3/54 pinout, 1.5KE33C-E3/54 application, or 1.5KE33C-E3/54 equivalent, this device serves as a high-energy, sub-nanosecond-response overvoltage protection component for ungrounded or AC-coupled lines where bidirectional surge suppression is required without polarity constraints.
Technical Context
This TVS operates symmetrically in both forward and reverse directions due to its bidirectional junction structure, enabling protection of AC lines and differential buses without orientation dependency. Its glass-passivated chip junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 28.2 V stand-off voltage).
The device delivers 1500 W peak pulse power handling with a 10/1000 µs waveform and exhibits an incremental clamping resistance of ~0.38 Ω (calculated from ΔVC/ΔIPPM), supporting robust transient energy absorption while maintaining low clamping overshoot during ESD and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1.0 mA - defines precise voltage threshold where clamping initiates under surge conditions |
| 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 - clamped voltage seen by protected circuit during full-rated 1500 W transient event |
| PPPM | 1500 W - peak surge power capability with 10/1000 µs waveform, suitable for IEC 61000-4-5 Level 4 compliance |
| Junction Temp Range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments without derating |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 rated epoxy body |
Pinout & Package
1.5KE33C-E3/54 uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. No polarity marking is present, consistent with bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | Either terminal accepts positive or negative transient; no cathode band or polarity identification required |
| Leads (matte tin plated) | PCB interconnect and thermal path | Solderable per J-STD-002/JESD 22-B102; supports 275 °C solder dip (10 s max); contributes to RθJL = 15.4 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, RS-485, CAN FD, and other floating or differential interfaces without polarity concerns |
| 1500 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics up to Level 4 (4 kV line-to-ground) |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or polymer-based suppressors - preserving signal integrity in high-speed circuits |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term reliability under thermal cycling and humidity stress |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance; suitable for commercial-grade applications with extended temperature life |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and lighting modules against load dump and alternator surge events. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed across input rails upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤45.7 V during 1500 W surges, preventing latch-up or gate oxide rupture in downstream MOSFETs and microcontrollers. | Use Scenario: Shielding analog outputs (4–20 mA, 0–10 V) and digital sensor interfaces (I²C, SPI) from EFT and ESD coupling in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) shunt protector placed at connector entry point. Use Value: Clamps fast-rising transients (e.g., 8/20 µs) without distorting signal edges or introducing measurable propagation delay. |
| Telecom Line Interface | AC Mains-Supplied Consumer Devices |
Use Scenario: Safeguarding Ethernet PHYs, DSL modems, and PoE injectors against induced lightning surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Bidirectional front-end suppressor in hybrid transformer-coupled interface stages. Use Value: Symmetric clamping prevents DC bias shift on center-tapped transformers and maintains common-mode rejection during differential surges. | Use Scenario: Secondary-side surge protection in switched-mode power supplies for smart home hubs and audio amplifiers. IC Role / Device Role / Timing Role: Final-stage rail clamp after Y-cap filtering and before linear regulators or audio DACs. Use Value: Absorbs residual ringback and switching noise transients that bypass primary-side MOVs, reducing audible pop/noise and improving EMC margin. |
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 | Lower PPPM (600 W), smaller SMB package (surface-mount), lower IPPM (33.3 A), same VBR range (31.4–34.7 V) | Preferred for space-constrained PCBs; unsuitable for >600 W surge events or high-temperature ambient (>125 °C) | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 3; verify thermal relief for SMB footprint. |
| 1.5SMC33CA | Same PPPM (1500 W), SMC package (surface-mount), identical VBR/VC, higher thermal resistance (RθJA ≈ 110 °C/W vs. 75 °C/W) | Better for automated assembly; requires larger copper pour for thermal management compared to axial 1.5KE | Choose for reflow-compatible designs needing equal surge rating; ensure ≥200 mm² 2-oz copper pad for sustained power dissipation. |
Compared with 1.5KE33C-E3/54, SMBJ33CA trades surge capacity for compactness, while 1.5SMC33CA matches power rating but demands more careful thermal layout - making 1.5KE33C-E3/54 optimal for through-hole, high-reliability, thermally demanding applications where lead-frame conduction dominates cooling.
Availability
1.5KE33C-E3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor signal conditioning, telecom line interface, and AC mains-supplied consumer devices requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE33C-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, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes include lightning-induced surges, load dump, and EFT bursts.
FAQ
What is the breakdown voltage tolerance of the 1.5KE33C-E3/54?
The 1.5KE33C-E3/54 has a specified breakdown voltage range of 31.4 V to 34.7 V at 1.0 mA test current, representing a ±5 % tolerance around the nominal 33 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting voltage-sensitive loads like microcontroller I/O rails and analog front-ends. The 1.5KE33C-E3/54 maintains this specification under JEDEC-standard test conditions per document 88301.
Is the 1.5KE33C-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE33C-E3/54 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 6a, with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance requirements. Lead content is below 0.1 wt%, and all homogeneous materials comply with Annex II substance restrictions. The 1.5KE33C-E3/54 is not halogen-free per Vishay's material categorization doc 99912, but satisfies standard commercial-grade environmental mandates.
Can the 1.5KE33C-E3/54 be used in place of a unidirectional TVS like 1.5KE33A?
No - the 1.5KE33C-E3/54 is strictly bidirectional and lacks polarity marking, whereas 1.5KE33A is unidirectional with a cathode band. Substituting them risks incorrect installation on DC rails and potential short-circuit failure. The 1.5KE33C-E3/54 is intended only for AC, differential, or floating nodes; using it on a polarized DC bus may allow forward conduction during normal operation. Always match polarity type to circuit topology - the 1.5KE33C-E3/54 must be verified for symmetrical voltage swing in the target application.
What is the maximum clamping voltage of the 1.5KE33C-E3/54 at rated peak pulse current?
The 1.5KE33C-E3/54 exhibits a maximum clamping voltage (VC) of 45.7 V when subjected to its rated peak pulse current of 32.8 A under the standard 10/1000 µs waveform. This value is measured per Figure 7 in Vishay document 88301 and represents the worst-case voltage imposed on protected circuitry during a full 1500 W transient event. Designers must ensure downstream components tolerate ≤45.7 V transient exposure, especially logic-level MOSFETs and 3.3 V/5 V ICs with limited absolute maximum ratings.
Does the 1.5KE33C-E3/54 meet AEC-Q101 qualification?
No - the 1.5KE33C-E3/54 is a commercial-grade part with the "E3" suffix. AEC-Q101 qualification applies only to variants bearing the "HE3" suffix (e.g., 1.5KE33CHE3_B), which undergo additional stress testing for automotive under-hood use. The 1.5KE33C-E3/54 meets all electrical and mechanical specs in document 88301 but lacks the extended temperature cycling, HTRB, and ESD validation required for AEC-Q101. For automotive applications, specify 1.5KE33CHE3_B instead of 1.5KE33C-E3/54.
1.5KE33C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE33C-E3/54 FAQ
1.How can I place an order for 1.5KE33C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33C-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 1.5KE33C-E3/54 reliable?
The price and inventory of 1.5KE33C-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 1.5KE33C-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE33C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33C-E3/54?
1.5KE33C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33C-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 1.5KE33C-E3/54?
For technical support, including 1.5KE33C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33C-E3/54 requirements.
6.How does Aetrix verify that 1.5KE33C-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE33C-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 1.5KE33C-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE33C-E3/54?
All 1.5KE33C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33C-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 1.5KE33C-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE33C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33C-E3/54 Tags
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