My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE18CA-E3/54
- Part No.:
- 1.5KE18CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18CA-E3/54.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:10,687
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE18CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 1500 W peak pulse power rating (10/1000 µs), 17.1–18.9 V breakdown voltage (VBR) at 1 mA, 15.3 V maximum standoff voltage (VWM), and clamps to ≤25.2 V at 59.5 A peak pulse current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE18CA-E3/54 datasheet, 1.5KE18CA-E3/54 pinout, 1.5KE18CA-E3/54 application, or 1.5KE18CA-E3/54 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package details, thermal derating curves, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional CA construction. Its 10/1000 µs waveform response enables protection against lightning-induced surges and inductive switching transients without degradation under repetitive 0.01% duty cycle conditions.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15.4 °C/W, supporting operation from –55 °C to +175 °C junction temperature. The 1.5KE18CA-E3/54 exhibits low incremental surge resistance and fast sub-nanosecond response time, ensuring effective suppression before sensitive downstream circuitry sustains damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1 mA - defines reliable avalanche initiation threshold for bidirectional transient clamping |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during 1500 W transient, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, enabling high-energy surge absorption |
| IFSM | Not applicable - bidirectional device has no forward surge rating; unidirectional variants only specify 200 A |
| TJ range | –55 °C to +175 °C - supports under-hood automotive and industrial environments without derating loss |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded, UL 94 V-0 compliant housing |
Pinout & Package
1.5KE18CA-E3/54 uses the standard DO-201AD axial package (Case Style 1.5KE) with matte tin-plated leads solderable per J-STD-002. No polarity marking is present on bidirectional variants; terminals are non-polarized and function identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional avalanche junction | Both ends serve as symmetrical clamping terminals; no cathode band - enables placement without orientation check |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without failure when properly mounted |
| Sub-nanosecond response | Clamps transients within 1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| AEC-Q101 qualified option | 1.5KE18CAHE3_B variant available for automotive applications requiring qualification traceability |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and transportation equipment |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role: Bidirectional clamping element placed across differential signal pairs or supply rails upstream of interface ICs. Use Value: Limits transient voltage to ≤25.2 V while absorbing 1500 W spikes - preventing latch-up or gate oxide rupture in 3.3 V/5 V sensor front-ends. | Use Scenario: Shielding digital input channels in programmable logic controllers from induced surges on field wiring in factory automation. IC Role / Device Role: Primary overvoltage clamp on 24 V DC input terminals, coordinated with series impedance and filtering. Use Value: Maintains system uptime by surviving repeated 1 kV/40 Ω surges per IEC 61000-4-4 without parameter shift or catastrophic failure. |
| Telecom Line Interface | Consumer Power Adapter ESD |
Use Scenario: Safeguarding Ethernet PHYs and DSL line drivers against lightning-induced common-mode surges on outdoor copper lines. IC Role / Device Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp precision for semiconductor-level defense. Use Value: Clamps residual transients to 25.2 V after GDT crowbarring - protecting 100BASE-TX transformers and magnetics rated for <30 V isolation. | Use Scenario: Adding robustness to USB-C and barrel-jack inputs in AC/DC adapters against user-handling ESD and hot-plug transients. IC Role / Device Role: Input-stage TVS on primary-side DC bus, placed before rectifier and bulk capacitor. Use Value: Handles ±15 kV contact ESD (IEC 61000-4-2) and 1500 W surges without degradation - extending adapter lifetime in retail and medical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | 600 W PPPM, DO-214AA package, lower IPPM (33.3 A), same VBR range (17.1–18.9 V) | Surface-mount alternative for space-constrained PCBs; lacks axial lead mechanical robustness for high-vibration environments | Select SMBJ18CA when board area is limited and surge energy rarely exceeds 600 W; retain 1.5KE18CA-E3/54 for legacy through-hole designs or higher-energy threats. |
| 1.5KE18CAHE3_B | Identical electrical specs; AEC-Q101 qualified, HE3 suffix denotes whisker-tested leads and automotive-grade screening | Required for automotive OEM production; commercial E3 version not approved for safety-critical vehicle subsystems | Choose 1.5KE18CAHE3_B for new automotive programs; 1.5KE18CA-E3/54 remains valid for industrial/commercial use where qualification is not mandated. |
Compared with SMBJ18CA and 1.5KE18CAHE3_B, the 1.5KE18CA-E3/54 offers the highest surge energy margin (1500 W) in a through-hole package, making it optimal for high-reliability industrial power entry and retrofit applications where AEC-Q101 is unnecessary but mechanical stability matters.
Availability
1.5KE18CA-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line conditioning, and consumer power adapter surge hardening requiring stable component supply and full traceability.
Supply support for 1.5KE18CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are critical.
FAQ
What is the breakdown voltage range of the 1.5KE18CA-E3/54?
The 1.5KE18CA-E3/54 has a guaranteed breakdown voltage (VBR) range of 17.1 V to 18.9 V at 1 mA test current, measured in both directions due to its bidirectional construction. This tight tolerance ensures consistent clamping onset across production lots and temperature extremes from –55 °C to +175 °C, directly supporting compliance with IEC 61000-4-5 surge immunity testing.
Is the 1.5KE18CA-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE18CA-E3/54 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and lead-free matte tin plating per JESD 201 Class 1A whisker testing. The epoxy body meets UL 94 V-0 flammability standards, and all materials are documented in Vishay's compliance portal under document number 99912.
How does the 1.5KE18CA-E3/54 differ from unidirectional 1.5KE18A variants?
The 1.5KE18CA-E3/54 is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas the 1.5KE18A is unidirectional with a cathode band and specified forward voltage (VF = 3.5 V at 100 A). The 1.5KE18CA-E3/54 supports AC-coupled or floating signal line protection; the unidirectional version is restricted to DC-biased rails with defined polarity.
What is the maximum clamping voltage of the 1.5KE18CA-E3/54 at rated peak pulse current?
The 1.5KE18CA-E3/54 clamps to a maximum of 25.2 V at its rated peak pulse current of 59.5 A (10/1000 µs waveform). This value is measured across the device terminals during standardized surge testing and represents the upper limit of voltage imposed on protected circuitry - critical for ensuring compatibility with 3.3 V, 5 V, and 24 V logic and interface ICs.
Can the 1.5KE18CA-E3/54 be used in parallel to increase surge handling capacity?
While the 1.5KE18CA-E3/54 datasheet notes TVS diodes can be used in parallel to increase peak power ratings, doing so requires matched VBR units and careful layout to ensure current sharing. For the 1.5KE18CA-E3/54, parallel use is feasible only with bin-selected devices (±2% VBR matching) and symmetric trace lengths - otherwise, imbalance may cause premature failure of one unit while the other remains underutilized.
1.5KE18CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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
1.5KE18CA-E3/54 FAQ
1.How can I place an order for 1.5KE18CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18CA-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 1.5KE18CA-E3/54 reliable?
The price and inventory of 1.5KE18CA-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 1.5KE18CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE18CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18CA-E3/54?
1.5KE18CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18CA-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 1.5KE18CA-E3/54?
For technical support, including 1.5KE18CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE18CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE18CA-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 1.5KE18CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE18CA-E3/54?
All 1.5KE18CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18CA-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 1.5KE18CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE18CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18CA-E3/54 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
