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Vishay General Semiconductor - Diodes Division 1.5KE18CHE3/73
- Part No.:
- 1.5KE18CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18CHE3/73.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,902
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Product details
Overview
1.5KE18CHE3/73 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 18 V breakdown voltage (VBR = 17.1–18.9 V at 1 mA), 15.3 V maximum working voltage (VWM), 25.2 V clamping voltage (VC) at 59.5 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 1.5KE18CHE3/73 datasheet, 1.5KE18CHE3/73 pinout, 1.5KE18CHE3/73 application, or 1.5KE18CHE3/73 equivalent, this part delivers verified clamping performance, AEC-Q101 qualification (HE3 suffix), RoHS-compliant matte tin leads, and UL 94 V-0 molded epoxy packaging - critical for automotive, industrial, and telecom surge protection design validation.
Technical Context
This TVS diode operates as a silicon avalanche device with glass-passivated junction, enabling sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its unidirectional polarity uses a cathode band marking and supports 200 A non-repetitive forward surge current (IFSM) per 8.3 ms half-sine wave.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15.4 °C/W, with operating junction temperature range of –55 °C to +175 °C. The 1.5KE18CHE3/73 variant carries the HE3 suffix, confirming AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 15.3 V - maximum continuous reverse voltage before leakage exceeds 1 μA, ensuring no false conduction in normal operation |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 1500 W - peak transient power handling capability, sufficient for IEC 61000-4-5 Level 4 surge immunity |
| IFSM | 200 A - withstands high-energy 8.3 ms half-sine surges without failure, critical for motor drive and power supply inputs |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant epoxy body |
Pinout & Package
1.5KE18CHE3/73 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package with cathode indicated by a color band. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, rated for 275 °C dip soldering (10 s max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to circuit ground or low-impedance return when used in unidirectional clamp configuration |
| Cathode (banded end) | Avalanche conduction terminal | Connected to protected line (e.g., 12 V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| UL 94 V-0 epoxy molding | Provides flame-retardant mechanical encapsulation essential for safety-critical and enclosed systems |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 15.3 V. Use Value: Limits peak voltage to 25.2 V during 59.5 A transients, preventing damage to microcontrollers and CAN transceivers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across differential pair or single-ended output to suppress fast-rising transients. Use Value: Sub-nanosecond response ensures clamping occurs before sensitive op-amps or ADC inputs experience overstress. |
| Telecom Line Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Guarding PoE-powered equipment front-end against induced lightning surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary-level TVS on DC input side of isolated DC/DC converter, upstream of filtering. Use Value: 1500 W rating handles multi-kV transients per IEC 61000-4-5; UL 94 V-0 housing prevents fire propagation. | Use Scenario: Safeguarding AC/DC adapter secondary-side 12 V or 5 V outputs against user-induced surges and capacitor discharge. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at output connector to clamp reverse-polarity or hot-plug events. Use Value: 200 A IFSM withstands repeated 8.3 ms surges; RoHS-compliant leads support automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | DO-214AA (SMB) surface-mount package; same VBR (17.1–18.9 V), lower PPPM = 600 W | Not suitable for high-energy 1500 W surges; limited to board-level ESD and lower-energy transients | Select SMBJ18A only if space-constrained PCB layout and <600 W surge levels are acceptable. |
| 1.5KE18A-E3/54 | Same DO-201AD package and electrical specs, but commercial-grade (non-AEC-Q101) and E3-only (no HE3 qualification) | Lacks automotive qualification; not approved for under-hood or safety-critical vehicle subsystems | Choose 1.5KE18A-E3/54 for cost-sensitive industrial or consumer applications where AEC-Q101 is not required. |
Compared with 1.5KE18CHE3/73, SMBJ18A trades 60% peak power for SMT compatibility, while 1.5KE18A-E3/54 retains identical form-factor and clamping but omits automotive qualification - making 1.5KE18CHE3/73 the sole choice for AEC-Q101-compliant 1500 W unidirectional protection.
Availability
1.5KE18CHE3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE18CHE3/73 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 and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness against lightning, load dump, and ESD is mandatory.
FAQ
What is the clamping voltage of the 1.5KE18CHE3/73 under a 10/1000 µs surge?
The 1.5KE18CHE3/73 clamps to 25.2 V at its rated peak pulse current of 59.5 A with a 10/1000 µs waveform. This value is measured per JEDEC standards and reflects the maximum voltage seen by protected circuitry during a standardized surge event - a key parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5KE18CHE3/73 suitable for automotive applications?
Yes, the 1.5KE18CHE3/73 is AEC-Q101 qualified (confirmed by the HE3 suffix) and rated for junction temperatures up to +175 °C. It meets automotive requirements for under-hood and body electronics, including protection of ECUs, sensors, and infotainment power supplies against load dump and ISO 7637-2 transients.
What does the "HE3" suffix indicate in 1.5KE18CHE3/73?
The "HE3" suffix in 1.5KE18CHE3/73 denotes RoHS compliance plus AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this grade from commercial-only variants (e.g., E3-only parts) and confirms suitability for automotive and high-reliability industrial use.
How does the 1.5KE18CHE3/73 differ from the 1.5KE18A-E3/54?
The 1.5KE18CHE3/73 and 1.5KE18A-E3/54 share identical electrical specs and DO-201AD packaging, but only the HE3 version is AEC-Q101 qualified. The E3/54 variant is commercial-grade and lacks automotive qualification - making 1.5KE18CHE3/73 the required choice for automotive designs.
What is the maximum reverse leakage current for the 1.5KE18CHE3/73 at its working voltage?
At its maximum stand-off voltage of 15.3 V (VWM), the 1.5KE18CHE3/73 exhibits ≤1.0 μA reverse leakage current at 25 °C. This low leakage ensures minimal power loss and avoids false triggering in always-on circuits such as automotive wake-up lines or battery-monitoring systems.
1.5KE18CHE3/73 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):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 56.6A
- 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
1.5KE18CHE3/73 FAQ
1.How can I place an order for 1.5KE18CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18CHE3/73 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 1.5KE18CHE3/73 reliable?
The price and inventory of 1.5KE18CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE18CHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE18CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18CHE3/73?
1.5KE18CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18CHE3/73 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 1.5KE18CHE3/73?
For technical support, including 1.5KE18CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18CHE3/73 requirements.
6.How does Aetrix verify that 1.5KE18CHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE18CHE3/73 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 1.5KE18CHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE18CHE3/73?
All 1.5KE18CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18CHE3/73, 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 1.5KE18CHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE18CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18CHE3/73 Tags
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