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Vishay General Semiconductor - Diodes Division 1.5KE33-E3/54
- Part No.:
- 1.5KE33-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33-E3/54.pdf
- Description:
- TVS DIODE 26.8VWM 47.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,491
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Product details
Overview
1.5KE33-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 31.4 V to 34.7 V breakdown voltage (VBR) at 1.0 mA test current, 28.2 V maximum standoff voltage (VWM), 45.7 V clamping voltage (VC) at 32.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE33-E3/54 datasheet, 1.5KE33-E3/54 pinout, 1.5KE33-E3/54 application, or 1.5KE33-E3/54 equivalent, this device serves as a high-energy, fast-response (≤1 ns), glass-passivated unidirectional TVS for industrial power supplies, automotive control units, and telecom interface protection where robust surge immunity and RoHS-compliant commercial-grade reliability are required.
Technical Context
This unidirectional TVS operates by avalanche breakdown above its specified VBR, clamping transient voltages to ≤45.7 V while conducting up to 32.8 A under standardized 10/1000 µs pulses. Its 1500 W peak pulse power rating is derated linearly above 25 °C ambient per JEDEC curves, with thermal resistance of 75 °C/W junction-to-ambient and 15.4 °C/W junction-to-lead.
The device exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.45), enabling effective protection of downstream silicon without excessive voltage overshoot. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the E3 suffix confirms JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1.0 mA - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 45.7 V at 32.8 A - clamped voltage during full 1500 W transient, limiting stress on protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, suitable for IEC 61000-4-5 Level 4 surges |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supports inrush and fault-current events |
| TJ max. | +175 °C - maximum junction temperature enables operation in high-temperature environments like engine bays or enclosed power systems |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with molded epoxy body meeting UL 94 V-0 flammability |
Pinout & Package
1.5KE33-E3/54 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; polarity must be observed in circuit placement to ensure proper unidirectional clamping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point during reverse-biased clamping | Connected to protected line (e.g., VIN or signal); conducts surge current toward ground when VLINE exceeds VBR |
| Cathode (banded end) | Current exit point during clamping; reference node | Typically tied to system ground or low-impedance return path; establishes clamping reference and ensures correct polarity-dependent operation |
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) | Provides robust protection against high-energy transients such as lightning-induced surges per IEC 61000-4-5 |
| Clamping voltage ≤45.7 V at 32.8 A | Ensures protected ICs or MOSFETs remain below absolute maximum ratings during worst-case surge events |
| Response time ≤1 ns | Acts before sensitive components experience damaging overvoltage - faster than MOVs or gas discharge tubes |
| E3 suffix RoHS compliance & JESD 201 Class 1A whisker resistance | Meets global environmental requirements and prevents tin whisker growth in high-reliability PCB assemblies |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: DC input stage of 24 V industrial SMPS exposed to load dump and inductive kickback from solenoids or relays. IC Role / Device Role: Primary overvoltage clamp placed between input rail and chassis ground to limit transients to safe levels. Use Value: Clamps 10/1000 µs surges to ≤45.7 V, preventing damage to upstream rectifiers and downstream PWM controllers rated for ≤60 V absolute max. |
Use Scenario: CAN bus power line (VCC) in BCM exposed to ISO 7637-2 Pulse 5a load dump events. IC Role / Device Role: Unidirectional TVS on 12 V supply rail to absorb >100 V, 100 ms transients without failure. Use Value: Withstands 200 A non-repetitive forward surge and maintains clamping integrity across -40 °C to +125 °C ambient. |
| Telecom Interface Surge Protection | Consumer Sensor Signal Line Protection |
Use Scenario: RS-485 data line power supply in outdoor base station equipment subject to induced lightning surges. IC Role / Device Role: Secondary rail protector on isolated DC-DC output powering transceiver ICs. Use Value: 1500 W rating and 45.7 V clamping prevent latch-up or gate oxide rupture in RS-485 drivers operating at 3.3 V or 5 V logic levels. |
Use Scenario: 3.3 V analog supply rail for MEMS temperature/humidity sensors in smart home hubs. IC Role / Device Role: Low-leakage (≤1.0 µA at 28.2 V) TVS on sensor VDD to suppress ESD and board-level coupling. Use Value: Standoff voltage margin (28.2 V vs. 3.3 V rail) eliminates false triggering while providing <1 ns response to 8 kV HBM ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | DO-214AA (SMB) package; lower 600 W PPPM; VC = 53.3 V @ 11.8 A; smaller footprint but reduced energy handling | Better suited for space-constrained PCBs with moderate surge requirements (IEC 61000-4-2/4-4), not IEC 61000-4-5 Level 4 | Select SMBJ33A-E3/52 only if board layout prohibits axial DO-201AD and surge energy is limited to ≤600 W. |
| 1.5KE33AHE3_B | Same 1.5KE package and electrical specs, but AEC-Q101 qualified and HE3 whisker class 2 compliant | Required for automotive under-hood applications where qualification to AEC-Q101 and extended temperature cycling are mandatory | Choose 1.5KE33AHE3_B for automotive OEM designs; 1.5KE33-E3/54 remains optimal for commercial/industrial use with cost and availability advantages. |
Compared with SMBJ33A-E3/52, 1.5KE33-E3/54 delivers 2.5× higher surge energy absorption and lower clamping voltage, while 1.5KE33AHE3_B adds automotive qualification without altering electrical performance - making 1.5KE33-E3/54 the preferred choice for cost-sensitive, high-energy industrial protection.
Availability
1.5KE33-E3/54 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control modules, and telecom interface protection requiring stable component supply, RoHS-compliant packaging, and proven 1500 W surge resilience.
Supply support for 1.5KE33-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, efficiency, and application-specific optimization.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure systems where failure due to voltage surges must be eliminated.
FAQ
What is the breakdown voltage range of the 1.5KE33-E3/54?
The 1.5KE33-E3/54 has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at 1.0 mA test current, measured per JEDEC standard. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable design margining in 24 V and 32 V systems where overvoltage thresholds must be precisely controlled. The 1.5KE33-E3/54 achieves this via glass-passivated junction technology for stable avalanche characteristics.
How does the 1.5KE33-E3/54 differ from bidirectional TVS diodes like 1.5KE33CA?
The 1.5KE33-E3/54 is unidirectional and features a cathode band for polarity-sensitive placement, enabling clamping only during reverse overvoltage events - ideal for DC power rails. In contrast, 1.5KE33CA is bidirectional with no polarity marking and symmetric clamping in both directions, suited for AC lines or differential signal pairs. The 1.5KE33-E3/54 offers lower leakage (<1.0 µA at 28.2 V) and higher surge current rating than its CA counterpart in DC applications.
What is the maximum clamping voltage of the 1.5KE33-E3/54 under surge conditions?
The 1.5KE33-E3/54 clamps to a maximum of 45.7 V when subjected to its rated peak pulse current of 32.8 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and represents the upper limit of voltage seen by protected circuitry during worst-case transients. Designers use this figure - not VBR - to verify that downstream components remain within their absolute maximum voltage ratings during surge events involving the 1.5KE33-E3/54.
Is the 1.5KE33-E3/54 suitable for automotive applications?
The 1.5KE33-E3/54 is a commercial-grade device rated for operation from -55 °C to +175 °C junction temperature and is widely used in automotive subsystems such as infotainment and body electronics. However, it is not AEC-Q101 qualified. For applications requiring formal automotive qualification (e.g., engine control, ADAS), the functionally identical 1.5KE33AHE3_B variant should be selected - it shares all electrical parameters of the 1.5KE33-E3/54 but adds AEC-Q101 certification and enhanced whisker resistance.
What package type and lead finish does the 1.5KE33-E3/54 use?
The 1.5KE33-E3/54 uses the DO-201AD (Case Style 1.5KE) axial-leaded package with a molded epoxy body meeting UL 94 V-0 flammability. Its leads are matte tin plated and fully compliant with J-STD-002 and JESD 22-B102 solderability standards. The E3 suffix confirms conformance to JESD 201 Class 1A whisker testing, ensuring long-term reliability in high-humidity or high-temperature PCB environments where tin whisker growth could cause short circuits.
1.5KE33-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE33-E3/54 FAQ
1.How can I place an order for 1.5KE33-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33-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 1.5KE33-E3/54 reliable?
The price and inventory of 1.5KE33-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 1.5KE33-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE33-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33-E3/54?
1.5KE33-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33-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 1.5KE33-E3/54?
For technical support, including 1.5KE33-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33-E3/54 requirements.
6.How does Aetrix verify that 1.5KE33-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE33-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 1.5KE33-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE33-E3/54?
All 1.5KE33-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33-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 1.5KE33-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE33-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33-E3/54 Tags
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