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Vishay General Semiconductor - Diodes Division 1.5KE18-E3/54
- Part No.:
- 1.5KE18-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18-E3/54.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,452
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Product details
Overview
1.5KE18-E3/54 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 17.1 V minimum breakdown voltage (VBR), 15.3 V maximum standoff voltage (VWM), 25.2 V clamping voltage (VC) at 59.5 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 1.5KE18-E3/54 datasheet, 1.5KE18-E3/54 pinout, 1.5KE18-E3/54 application, or 1.5KE18-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package dimensions, polarity marking convention, clamping performance under surge conditions, and direct alternative options with documented functional trade-offs.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional configuration provides reverse-biased clamping only, with cathode marked by a color band and forward voltage limited to 3.5 V at 100 A.
The device complies with JEDEC standard 1.5KE case outline, supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits a temperature coefficient of VBR at +0.089 %/°C - enabling stable clamping behavior across wide thermal operating ranges in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1.0 mA test current - defines reliable conduction onset threshold for overvoltage events |
| VWM | 15.3 V maximum - ensures no leakage conduction during normal 12 V–15 V DC rail operation |
| VC @ IPPM | 25.2 V at 59.5 A (10/1000 µs) - limits downstream component stress during lightning or ESD transients |
| PPPM | 1500 W peak pulse power - sustains high-energy surges without failure per IEC 61000-4-5 Level 4 |
| IFSM | 200 A peak forward surge (8.3 ms) - withstands inrush or load-dump events in automotive 12 V systems |
| TJ range | –55 °C to +175 °C - qualified for under-hood and industrial control cabinet deployment |
| Leakage @ VWM | 1.0 µA maximum - prevents measurable power loss in battery-powered sensor nodes |
Pinout & Package
Package: JEDEC-standard 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant matte tin-plated leads. Cathode identified by color band; no marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to protected line ground or low-side reference; enables clamping when VAK exceeds VBR |
| Cathode | Clamping node / surge sink | Marked with color band; tied to protected circuit's positive rail or signal line to divert transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive ECUs |
| Clamping time < 1 ns | Protects CMOS ICs and MOSFET gates before destructive voltage overshoot occurs |
| Low incremental surge resistance | Minimizes VC rise under high di/dt events, preserving safe operating area of downstream FETs |
| AEC-Q101 qualification option (HE3 suffix) | Available variant meets automotive-grade stress testing for engine control and ADAS subsystems |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 12 V battery feed to body control module exposed to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary clamping element placed between input rail and ground to limit transient voltage to ≤25.2 V. Use Value: Prevents gate oxide rupture in upstream DC/DC controllers and protects MCU reset circuitry from >100 V spikes. |
Use Scenario: 4–20 mA current loop interface in PLC analog input card subjected to field wiring ESD. IC Role / Device Role / Timing Role: Unidirectional shunt clamp on signal line referenced to local ground. Use Value: Limits induced voltage to <25.2 V during ±8 kV contact discharge, preserving ADC front-end integrity. |
| Telecom DC Power Feeder Protection | Consumer Appliance Motor Drive Surge Absorption |
Use Scenario: -48 V DC power input to base station radio unit encountering lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail to clamp positive transients toward chassis ground. Use Value: Maintains VC below 25.2 V at 59.5 A, preventing latch-up in PMICs and protecting Ethernet PHY bias networks. |
Use Scenario: Brushed DC motor driver board in washing machine experiencing commutation spikes during stall conditions. IC Role / Device Role / Timing Role: Clamping diode across motor terminals to suppress inductive kickback. Use Value: Dissipates 1500 W peak energy within 1 ms, avoiding MOSFET avalanche failure and reducing EMI radiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | DO-214AA package, 600 W PPPM, lower VC (29.2 V), higher IPPM (20.5 A) | Surface-mount only; unsuitable for through-hole legacy designs or high-current leaded layouts | Select when PCB space is constrained and peak surge energy is ≤600 W; verify layout thermal relief for 20.5 A pulses |
| 1.5KE18AHE3_B | Same 1.5KE package, identical electrical specs, but AEC-Q101 qualified and HE3 whisker-tested | Approved for automotive under-hood use; requires automotive PPAP documentation and traceability | Choose for new automotive programs requiring qualification evidence; not required for commercial industrial use |
Compared with 1.5KE18-E3/54, SMBJ18A offers smaller footprint but reduced surge capacity, while 1.5KE18AHE3_B delivers identical protection with certified automotive reliability - enabling design reuse where qualification compliance is mandatory.
Availability
1.5KE18-E3/54 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface clamping, telecom DC feeder surge suppression, and consumer appliance motor drive circuits requiring stable component supply and full traceability.
Supply support for 1.5KE18-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, MOSFETs, 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, industrial, and telecom infrastructure where robustness against lightning, load dump, and ESD is non-negotiable.
FAQ
What is the clamping voltage of the 1.5KE18-E3/54 under a 10/1000 µs surge?
The 1.5KE18-E3/54 clamps to a maximum of 25.2 V when subjected to its rated peak pulse current of 59.5 A using the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures downstream components remain within safe voltage limits during transient events. The 1.5KE18-E3/54 achieves this with low incremental resistance, minimizing voltage overshoot beyond VC.
Is the 1.5KE18-E3/54 unidirectional or bidirectional?
The 1.5KE18-E3/54 is a unidirectional TVS diode, meaning it clamps only in reverse bias - its cathode is marked with a color band, and it conducts when the anode-to-cathode voltage exceeds the breakdown threshold. Bidirectional versions (e.g., 1.5KE18CA) exist in the same family but are distinct part numbers; the 1.5KE18-E3/54 does not provide symmetrical clamping.
Does the 1.5KE18-E3/54 meet automotive qualification standards?
The 1.5KE18-E3/54 itself is commercial-grade and not AEC-Q101 qualified. However, the functionally identical 1.5KE18AHE3_B variant carries AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. For automotive applications requiring formal qualification, specify the HE3_B suffix version - the 1.5KE18-E3/54 remains suitable for industrial and telecom use where qualification is not mandated.
What is the standoff voltage rating for the 1.5KE18-E3/54?
The 1.5KE18-E3/54 has a maximum working peak reverse voltage (VWM) of 15.3 V, ensuring no significant leakage current flows during normal operation at up to 15.3 V DC. This allows safe integration into 12 V nominal systems with margin for ripple and tolerance, while guaranteeing rapid conduction once transients exceed the 17.1 V minimum breakdown voltage.
Can the 1.5KE18-E3/54 be used in parallel for higher surge capability?
Yes - multiple 1.5KE18-E3/54 units can be paralleled to increase total peak pulse power handling, provided matched VBR tolerances (±5 %) and symmetrical PCB layout with equal trace inductance. Derating is required: two devices yield ~2700 W only if thermal coupling and current sharing are validated; Vishay recommends verifying clamping uniformity with pulse testing before production deployment.
1.5KE18-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE18-E3/54 FAQ
1.How can I place an order for 1.5KE18-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18-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 1.5KE18-E3/54 reliable?
The price and inventory of 1.5KE18-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 1.5KE18-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE18-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18-E3/54?
1.5KE18-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18-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 1.5KE18-E3/54?
For technical support, including 1.5KE18-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18-E3/54 requirements.
6.How does Aetrix verify that 1.5KE18-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE18-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 1.5KE18-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE18-E3/54?
All 1.5KE18-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18-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 1.5KE18-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE18-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18-E3/54 Tags
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