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Vishay General Semiconductor - Diodes Division 1.5KE33CHE3/54
- Part No.:
- 1.5KE33CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33CHE3/54.pdf
- Description:
- TVS DIODE 26.8VWM 47.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,464
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Product details
Overview
1.5KE33CHE3/54 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 mA, 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 1.5KE33CHE3/54 datasheet, 1.5KE33CHE3/54 pinout, 1.5KE33CHE3/54 application, or 1.5KE33CHE3/54 equivalent, this part is selected for high-energy transient suppression in automotive power supplies, industrial I/O modules, and telecom line cards where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 28.2 V), then avalanches sharply at its specified VBR to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
The device complies with JEDEC standard 1.5KE case style, uses matte tin-plated leads solderable per J-STD-002, and supports 200 A non-repetitive forward surge current (8.3 ms half-sine). Thermal resistance is 15.4 °C/W junction-to-lead, enabling effective heat dissipation into PCB copper or chassis mounts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise avalanche onset threshold for reliable triggering |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 45.7 V at 32.8 A - clamping voltage during 1500 W transient, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, suitable for IEC 61000-4-5 Level 4 |
| IFSM | 200 A - surge current capability for 8.3 ms half-sine, critical for motor drive and relay coil snubbing |
| TJ range | –55 °C to +175 °C - extended junction temperature enables under-hood automotive and industrial deployment |
| Package | DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded package rated UL 94 V-0 |
Pinout & Package
1.5KE33CHE3/54 uses the DO-201AD axial package (Case Style 1.5KE), with cathode indicated by a color band on the body. Leads are matte tin-plated and compliant with JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane during clamping event |
| Cathode | Reverse-biased terminal / clamping node | Connected to protected line; avalanche conduction begins here when VWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5 %) and long-term reliability under thermal cycling |
| 1500 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without derating |
| Sub-nanosecond response time | Clamps transients within 1 ns - faster than MOVs or GDTs, preserving signal integrity |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements |
| UL 94 V-0 molding compound | Self-extinguishing epoxy housing meets fire safety standards for enclosed systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt clamping element placed between power rail and ground, triggered only during overvoltage events. Use Value: Limits rail voltage to ≤45.7 V during 1500 W surges, preventing damage to microcontrollers and CAN transceivers. | Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog modules from field wiring surges. IC Role / Device Role / Timing Role: Bidirectional transient suppressor (configured as unidirectional here) across input terminals. Use Value: Maintains signal accuracy by clamping induced spikes before they reach precision op-amps and ADC front-ends. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding Ethernet PHY power pins and data lines against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V/5 V bias rails feeding magnetics and PHY ICs. Use Value: Achieves <1 ns response to clamp 10/1000 µs transients, meeting GR-1089-CORE Level 3 requirements. | Use Scenario: Snubbing back-EMF from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Unidirectional clamping diode across motor terminals, conducting only during negative flyback. Use Value: Absorbs 200 A inductive kick energy without degradation, extending MOSFET lifetime and reducing EMI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | Lower PPPM (600 W), smaller SMB package, same VBR range (31.4–34.7 V) | Preferred for space-constrained PCBs; lower surge margin requires parallel staging for 1500 W needs | Select when board area is limited and peak surge energy is ≤600 W |
| 1.5KE33AHE3/54 | Same electrical specs and DO-201AD package, but lacks AEC-Q101 qualification | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment | Choose for cost-sensitive non-automotive designs where qualification is not mandated |
Compared with 1.5KE33CHE3/54, SMBJ33A-E3/52 trades surge capacity for footprint reduction, while 1.5KE33AHE3/54 offers identical performance without automotive qualification - making 1.5KE33CHE3/54 the sole option when AEC-Q101 compliance and full 1500 W clamping are both mandatory.
Availability
1.5KE33CHE3/54 is available at Aetrix Electronics and suitable for automotive power distribution units, industrial programmable logic controllers, and telecom infrastructure equipment requiring stable component supply and traceable sourcing.
Supply support for 1.5KE33CHE3/54 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 and application-specific validation.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness and repeatable clamping performance are critical.
FAQ
What is the breakdown voltage range of the 1.5KE33CHE3/54?
The 1.5KE33CHE3/54 has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at a test current of 1 mA, measured per JEDEC standard. This tight tolerance ensures predictable clamping behavior across production lots and temperature extremes, directly supporting design margin calculations for protected circuits. The 1.5KE33CHE3/54 maintains this specification under –55 °C to +175 °C operating conditions.
Is the 1.5KE33CHE3/54 RoHS compliant and AEC-Q101 qualified?
Yes, the 1.5KE33CHE3/54 carries both RoHS compliance (per EU Directive 2011/65/EU) and AEC-Q101 qualification, verified per stress test requirements including HTGB, HTRB, and TCT. The HE3 suffix explicitly denotes AEC-Q101 qualification, and the /54 tape-and-reel packaging meets JESD 22-B106 solder dip specifications. This dual certification makes the 1.5KE33CHE3/54 suitable for automotive powertrain and body electronics.
What is the clamping voltage of the 1.5KE33CHE3/54 at its rated peak pulse current?
The 1.5KE33CHE3/54 exhibits a maximum clamping voltage (VC) of 45.7 V at its rated peak pulse current (IPPM) of 32.8 A, defined using the industry-standard 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by downstream components during worst-case surge events, enabling accurate selection of voltage ratings for protected ICs and passive components in the same rail.
Can the 1.5KE33CHE3/54 be used in bidirectional configurations?
No - the 1.5KE33CHE3/54 is a unidirectional TVS diode, identified by the "A" suffix (not "CA"). Bidirectional variants such as 1.5KE33CAHE3/54 exist in the same family but feature symmetrical clamping in both polarities. Using the 1.5KE33CHE3/54 in AC or floating applications would result in forward conduction during negative half-cycles, potentially causing failure. Always match suffix: "A" = unidirectional, "CA" = bidirectional.
What is the thermal resistance and maximum junction temperature of the 1.5KE33CHE3/54?
The 1.5KE33CHE3/54 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and a maximum junction temperature (TJ) of +175 °C. These values allow direct mounting to copper pours or chassis for heat sinking, supporting continuous operation in high-ambient environments like engine compartments or industrial enclosures. Derating curves in the datasheet confirm usable power dissipation down to 25 % at 125 °C ambient.
1.5KE33CHE3/54 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE33CHE3/54 FAQ
1.How can I place an order for 1.5KE33CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33CHE3/54 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 1.5KE33CHE3/54 reliable?
The price and inventory of 1.5KE33CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33CHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE33CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33CHE3/54?
1.5KE33CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33CHE3/54 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 1.5KE33CHE3/54?
For technical support, including 1.5KE33CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33CHE3/54 requirements.
6.How does Aetrix verify that 1.5KE33CHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE33CHE3/54 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 1.5KE33CHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE33CHE3/54?
All 1.5KE33CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33CHE3/54, 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 1.5KE33CHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE33CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33CHE3/54 Tags
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