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Vishay General Semiconductor - Diodes Division 1.5KE33HE3/54
- Part No.:
- 1.5KE33HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33HE3/54.pdf
- Description:
- TVS DIODE 26.8VWM 47.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,961
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Product details
Overview
1.5KE33HE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 31.4 V minimum breakdown voltage (VBR), 28.2 V maximum standoff voltage (VWM), 45.7 V clamping voltage (VC) at 32.8 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across -55 °C to +175 °C junction temperature range - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE33HE3/54 datasheet, 1.5KE33HE3/54 pinout, 1.5KE33HE3/54 application, or 1.5KE33HE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), JEDEC 1.5KE package dimensions, and real-world clamping behavior under lightning-surge and inductive-switching transients.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR = 31.4–34.7 V (IT = 1.0 mA), limits voltage to ≤45.7 V at IPPM = 32.8 A (10/1000 µs waveform), and maintains stable performance up to TJ = 175 °C with derating per Fig. 2.
The device complies with AEC-Q101 stress testing (per Note 2), supports 200 A non-repetitive forward surge (8.3 ms half-sine), and exhibits 3.5 V max forward voltage at 100 A - enabling robust protection of MOSFET gate drivers and microcontroller I/O pins against ESD and load-dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at IT = 1.0 mA - defines precise conduction 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 (10/1000 µs) - actual clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient power handling capability without failure under standardized surge waveform |
| IFSM | 200 A (8.3 ms half-sine) - surge current tolerance for load-dump or battery-reversal events in automotive systems |
| TJ range | -55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance supports high-power pulse dissipation without heatsink |
Pinout & Package
Package: JEDEC-standard 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping |
| Cathode | Protected line connection / clamping reference node | Connected to line being protected (e.g., 24 V rail); voltage referenced to anode during transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per Note 2 |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under humidity and thermal stress |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges without degradation when properly mounted |
| Sub-nanosecond response | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms compliance with stringent tin-whisker mitigation for high-reliability PCB assemblies |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to ISO 7637-2 load dump (up to 120 V, 400 ms) and jump-start transients. IC Role / Device Role / Timing Role: Primary shunt protector placed between power rail and ground, conducting only during overvoltage events to clamp voltage below IC absolute maximum ratings. Use Value: Limits rail voltage to ≤45.7 V during 32.8 A surge, preventing damage to downstream regulators, CAN transceivers, and microcontrollers. |
Use Scenario: 4–20 mA current-loop sensors in factory automation subject to cable-induced EFT/burst noise and nearby relay switching. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used with series resistor) suppresses ±1 kV EFT pulses on analog input traces before ADC front-end. Use Value: Clamps induced transients within 1 ns while adding <0.5 pF capacitance - no signal distortion in 10 kHz bandwidth sensor outputs. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
Use Scenario: Central office DSLAM power inputs subjected to lightning-induced surges on copper pairs per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: First-stage overvoltage clamp on -48 V DC feed, coordinated with upstream gas discharge tube (GDT) for staged protection. Use Value: Handles 1500 W peak pulse energy while maintaining VC ≤45.7 V - ensures downstream DC/DC converters survive 10/1000 µs surges. |
Use Scenario: Brushed DC motor control boards in washing machines where commutation spikes exceed 100 V on 24 V logic rails. IC Role / Device Role / Timing Role: Rail-to-ground TVS on microcontroller VDD and H-bridge gate driver supplies to absorb inductive kickback. Use Value: Withstands 200 A 8.3 ms surge (per Fig. 6) and clamps spikes to safe levels, eliminating reset faults and MOSFET failures. |
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 | Lower PPPM (600 W), smaller SMB package (lower IPPM = 17.6 A), same VBR range (31.4–34.7 V) | Preferred for space-constrained PCBs with lower-energy transients (IEC 61000-4-2 ESD only) | Select SMBJ33A when board area is critical and surge energy does not exceed 600 W; verify thermal margin with RθJA = 110 °C/W |
| 1.5KE33A-E3/54 | Same electrical specs and 1.5KE package, but commercial-grade (non-AEC-Q101) and JESD 201 Class 1A whisker rating | Suitable for industrial/commercial equipment where automotive qualification is not required | Choose 1.5KE33A-E3/54 for cost-sensitive non-automotive designs; retains identical clamping and thermal performance |
Compared with SMBJ33A and 1.5KE33A-E3/54, the 1.5KE33HE3/54 uniquely combines AEC-Q101 qualification, JESD 201 Class 2 whisker resistance, and 1500 W surge capacity in the proven 1.5KE through-hole package - making it the only option qualified for under-hood automotive use with full load-dump immunity.
Availability
1.5KE33HE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power feeds, and appliance motor control systems requiring stable component supply across extended product lifecycles.
Supply support for 1.5KE33HE3/54 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 qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive power systems, industrial controls, and infrastructure equipment where failure is not acceptable.
FAQ
What is the clamping voltage of the 1.5KE33HE3/54 under a standard 10/1000 µs surge?
The 1.5KE33HE3/54 clamps to a maximum of 45.7 V when subjected to its rated peak pulse current of 32.8 A using the 10/1000 µs waveform. This value is measured per Figure 7 in the Vishay datasheet 88301 and represents the upper limit of voltage imposed on the protected circuit during worst-case transient conditions.
Is the 1.5KE33HE3/54 qualified for automotive applications?
Yes, the 1.5KE33HE3/54 is AEC-Q101 qualified per Note 2 in the Vishay datasheet 88301, covering devices from 1.5KE6.8AHE3_B to 1.5KE220AHE3_B. This qualification includes stress tests for temperature cycling, high-temperature reverse bias, and surge endurance - confirming suitability for under-hood and powertrain ECUs.
What does the "HE3" suffix indicate in 1.5KE33HE3/54?
The "HE3" suffix denotes RoHS-compliant construction with JESD 201 Class 2 whisker resistance and AEC-Q101 qualification. The "H" indicates AEC-Q101, "E3" specifies RoHS compliance and Class 2 tin whisker mitigation - distinguishing it from the commercial "E3" variant (e.g., 1.5KE33A-E3/54) which lacks automotive qualification.
Can the 1.5KE33HE3/54 be used in bidirectional configurations?
No, the 1.5KE33HE3/54 is a unidirectional TVS diode. Bidirectional variants use the "CA" suffix (e.g., 1.5KE33CA). Per datasheet note, bidirectional types are only available from 1.5KE6.8CA to 1.5KE220CA - 1.5KE33HE3/54 has polarity marking (cathode band) and is rated only for unidirectional surge suppression.
What is the thermal resistance from junction to lead (RθJL) for the 1.5KE33HE3/54?
The 1.5KE33HE3/54 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, as specified in the Thermal Characteristics table of Vishay document 88301. This low value enables effective heat transfer to PCB copper or chassis mounts without requiring external heatsinks for repetitive surge duty.
1.5KE33HE3/54 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE33HE3/54 FAQ
1.How can I place an order for 1.5KE33HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33HE3/54 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 1.5KE33HE3/54 reliable?
The price and inventory of 1.5KE33HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE33HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33HE3/54?
1.5KE33HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33HE3/54 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 1.5KE33HE3/54?
For technical support, including 1.5KE33HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33HE3/54 requirements.
6.How does Aetrix verify that 1.5KE33HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE33HE3/54 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 1.5KE33HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE33HE3/54?
All 1.5KE33HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33HE3/54, 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 1.5KE33HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE33HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33HE3/54 Tags
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