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Vishay General Semiconductor - Diodes Division 1.5KE33CHE3/73
- Part No.:
- 1.5KE33CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33CHE3/73.pdf
- Description:
- TVS DIODE 26.8VWM 47.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,122
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Product details
Overview
1.5KE33CHE3/73 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 33 V breakdown voltage (VBR = 31.4–34.7 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 45.7 V at 32.8 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial power supplies.
For engineers reviewing the 1.5KE33CHE3/73 datasheet, 1.5KE33CHE3/73 pinout, 1.5KE33CHE3/73 application, or 1.5KE33CHE3/73 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package dimensions, thermal resistance data (RθJA = 75 °C/W), AEC-Q101 qualification status, and real-world clamping behavior under 10/1000 µs surge conditions - all critical for robust circuit protection design.
Technical Context
This device implements a glass-passivated silicon PN junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-referenced placement on positive supply rails, with a 28.2 V stand-off voltage (VWM) ensuring stable operation below breakdown threshold.
It delivers 1500 W peak pulse power per JEDEC standard waveform (10/1000 µs), supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and maintains clamping performance across temperature via a +0.098 %/°C VBR temperature coefficient - enabling predictable protection margin in automotive and industrial environments.
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 controlled test conditions |
| VWM | 28.2 V - maximum continuous reverse 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 during full 1500 W transient; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform; validates suitability for lightning and inductive load surge events |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine); confirms robustness against high-energy turn-on transients |
| TJ max. | +175 °C - maximum junction temperature; enables use in under-hood automotive and high-ambient industrial applications |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient; informs heatsinking requirements for sustained power dissipation |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated leads; RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Dimensions: 5.3 mm × 5.3 mm × 9.5 mm (L × W × H), lead spacing 7.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected circuit reference node | Connected to system ground or return path; reverse-biased during normal operation; conducts only during overvoltage events |
| Anode | Line-side connection point | Attached to the rail or signal line requiring protection; carries full surge current to ground when VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable long-term reliability and low leakage (<1 µA at VWM) across temperature and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Validates immunity to IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation in single-event testing |
| Clamping voltage ≤45.7 V at 32.8 A | Ensures downstream 3.3 V/5 V logic and MOSFET gate drivers remain within absolute maximum ratings during transients |
| AEC-Q101 qualified (HE3 variant) | Confirms qualification for automotive powertrain and body electronics per stress test requirements including HTGB, TCT, and HTRB |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection fidelity |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24 V DC input stage of programmable logic controllers (PLCs) against load dump and relay coil flyback. IC Role / Device Role / Timing Role: Primary shunt TVS placed between VIN and GND, clamping transients within 1 ns to limit voltage excursion to ≤45.7 V. Use Value: Prevents permanent damage to upstream DC-DC controllers and downstream microcontrollers by absorbing up to 1500 W of surge energy without failure. |
Use Scenario: Safeguarding LIN bus transceivers and window motor drivers from battery voltage spikes during alternator load dump. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at BCM power entry point, referenced to chassis ground with cathode tied to GND. Use Value: Maintains functional safety integrity by limiting transient overvoltage to <46 V, well below 48 V absolute max rating of typical LIN ICs. |
| Telecom Remote Radio Unit (RRU) | Consumer Appliance Motor Drive Board |
Use Scenario: Shielding 48 V PoE-powered RF front-end modules from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 28.2 V) deployed on DC feed line prior to DC-DC conversion stage. Use Value: Survives repeated 10/1000 µs surges up to 32.8 A while maintaining <1 µA leakage at nominal 48 V - no standby power penalty. |
Use Scenario: Protecting BLDC motor gate drivers in smart washing machines from back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Cathode-grounded TVS on half-bridge high-side and low-side supply rails to clamp inductive kickback. Use Value: Eliminates need for snubber RC networks by providing sub-1 ns response and 200 A surge current handling per event. |
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 | Lower peak power (600 W), smaller SMB package (3.6 mm × 4.5 mm), higher VC (53.3 V @ 11.3 A) | Better suited for space-constrained PCBs with lower surge threat levels (IEC 61000-4-2/4-4); not rated for 1500 W events | Select when board area is critical and surge energy is limited to ≤600 W; verify clamping margin remains sufficient for protected ICs. |
| 1.5KE33AHE3_A | Same 1.5KE package and electrical specs, but AEC-Q101 revision code "A" instead of "B"; identical thermal and surge performance | No functional difference - both qualified for automotive use; "B" revision reflects updated process control and traceability | Prefer 1.5KE33CHE3/73 for new designs requiring latest AEC-Q101 compliance documentation and lot traceability per JESD22-B111. |
Compared with SMBJ33A-E3/52, 1.5KE33CHE3/73 provides 2.5× higher surge power handling and tighter clamping, making it essential for heavy industrial or automotive load-dump scenarios; versus 1.5KE33AHE3_A, it offers enhanced manufacturing traceability and revision-controlled qualification evidence without trade-offs in performance or footprint.
Availability
1.5KE33CHE3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom infrastructure, and appliance motor control systems requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE33CHE3/73 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, 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 1500 W surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE33CHE3/73?
The 1.5KE33CHE3/73 has a specified breakdown voltage range of 31.4 V to 34.7 V at 1.0 mA test current, representing ±5% tolerance around the nominal 33 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports reliable margining against protected IC absolute maximum ratings. The value is measured per JEDEC standard and confirmed in Vishay's 88301 datasheet.
Is 1.5KE33CHE3/73 RoHS compliant and halogen-free?
Yes, 1.5KE33CHE3/73 is RoHS compliant (per EU Directive 2011/65/EU) and meets Vishay's halogen-free definition (≤900 ppm bromine, ≤900 ppm chlorine, total ≤1500 ppm halogens). The "E3" suffix explicitly denotes RoHS compliance and JESD201 Class 1A whisker resistance. Full material declarations are available in Vishay's Doc. #99912.
Does 1.5KE33CHE3/73 require a heatsink for 6.5 W continuous dissipation?
No - the 6.5 W rating (PD) applies only with infinite heatsink at TL = 75 °C; in typical PCB mounting, derating is required. At ambient 25 °C with standard FR-4 board (1 in² copper pad), 1.5KE33CHE3/73 sustains ~1.5 W continuously. For sustained power, thermal simulation using RθJA = 75 °C/W is recommended - the device is intended for transient, not steady-state, dissipation.
Can 1.5KE33CHE3/73 be used in bidirectional configurations?
No - 1.5KE33CHE3/73 is unidirectional only, indicated by the "A" suffix (not "CA"). Bidirectional variants such as 1.5KE33CAHE3_B exist but differ in construction and marking. Using 1.5KE33CHE3/73 in AC or floating applications risks failure due to forward conduction during negative half-cycles; always match polarity suffix to circuit topology.
What is the surge current rating for 1.5KE33CHE3/73 under 8.3 ms half-sine waveform?
The 1.5KE33CHE3/73 supports 200 A non-repetitive forward surge current (IFSM) under an 8.3 ms single half-sine waveform, per JEDEC JESD22-A112. This rating validates robustness against automotive load dump events (ISO 16750-2) and inductive turn-off spikes. Derating curves in Fig. 6 of the datasheet show allowable IFSM decreases to ~140 A at TJ = 125 °C.
1.5KE33CHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE33CHE3/73 FAQ
1.How can I place an order for 1.5KE33CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33CHE3/73 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 1.5KE33CHE3/73 reliable?
The price and inventory of 1.5KE33CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33CHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE33CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33CHE3/73?
1.5KE33CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33CHE3/73 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 1.5KE33CHE3/73?
For technical support, including 1.5KE33CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33CHE3/73 requirements.
6.How does Aetrix verify that 1.5KE33CHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE33CHE3/73 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 1.5KE33CHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE33CHE3/73?
All 1.5KE33CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33CHE3/73, 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 1.5KE33CHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE33CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33CHE3/73 Tags
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