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Vishay General Semiconductor - Diodes Division 1.5KE18CAHE3_B/C
- Part No.:
- 1.5KE18CAHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18CAHE3_B/C.pdf
- Description:
- 1.5KW,18V 5%,BIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,127
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Product details
Overview
1.5KE18CAHE3_B/C 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 18 V breakdown voltage (VBR = 17.1–18.9 V at 1 mA), 15.3 V stand-off 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 in automotive and industrial control systems.
For engineers reviewing the 1.5KE18CAHE3_B/C datasheet, 1.5KE18CAHE3_B/C pinout, 1.5KE18CAHE3_B/C application, or 1.5KE18CAHE3_B/C equivalent, this part delivers verified bidirectional clamping performance, AEC-Q101 qualification (HE3 suffix), RoHS-compliant matte tin plating, and UL 94 V-0 molded epoxy packaging - critical for ESD/lightning transient suppression in harsh-environment electronics.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its bidirectional architecture allows symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
Rated for -55 °C to +175 °C operating junction temperature, it supports high-reliability applications with thermal resistance RθJL = 15.4 °C/W (junction-to-lead) and derates linearly above 25 °C ambient per Figure 2. The HE3 suffix confirms 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 working voltage before leakage exceeds 1 µA |
| 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 pulse power handling capability under standardized lightning-surge waveform |
| IPPM | 59.5 A - maximum non-repetitive surge current the device safely clamps without failure |
| Junction Temp Range | -55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes (HE3 suffix) - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating; leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102; no polarity marking (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals - either lead serves as input/output for transient energy diversion |
| Lead 1 / Lead 2 | Current path for surge conduction | Both leads conduct equally during positive or negative transients; requires no orientation during PCB placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge events |
| 1500 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) in industrial power supplies |
| AEC-Q101 qualified (HE3) | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Sub-nanosecond response time | Clamps transients before sensitive logic or analog circuitry sustains damage - faster than MOVs or GDTs |
| UL 94 V-0 epoxy encapsulation | Prevents flame propagation in safety-critical enclosures such as EV battery management systems |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and jump-start transients. IC Role / Device Role: Bidirectional TVS placed across power rail to clamp ±30 V spikes to safe levels. Use Value: Limits voltage to ≤25.2 V during 59.5 A surge, preventing latch-up or gate oxide rupture in MCU power domains. |
Use Scenario: Shielding RS-485 or CAN FD transceivers from ESD and inductive switching noise. IC Role / Device Role: Differential-line TVS on bus pairs to suppress common-mode transients up to 1500 W. Use Value: Maintains signal integrity by clamping fast-rising edges (<1 ns) without adding capacitance that degrades 5 Mbps data rates. |
| Consumer Appliance Motor Drive Protection | Telecom DSL Line Surge Protection |
Use Scenario: Safeguarding BLDC motor driver ICs from back-EMF spikes during commutation. IC Role / Device Role: TVS across half-bridge outputs to absorb inductive kickback energy. Use Value: Dissipates 1500 W pulses without degradation, extending lifetime of gate drivers in white goods inverters. |
Use Scenario: Front-end protection for ADSL/VDSL line cards exposed to lightning-induced surges on copper loops. IC Role / Device Role: Primary-level bidirectional suppressor on tip/ring lines before transformer coupling. Use Value: Withstands 10/1000 µs surges per ITU-T K.20/K.21, reducing need for secondary protection stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Lower peak power (600 W), smaller SMB package (vs. axial 1.5KE), higher VC (29.2 V @ 20.9 A) | Better suited for space-constrained PCBs but less robust for high-energy surges | Select when board area is limited and surge energy stays below 600 W; not drop-in for 1500 W requirements |
| 1.5KE18AHE3_B/C | Unidirectional version - same VBR, VWM, PPPM, but cathode-marked and asymmetric clamping | Required only where DC-biased lines demand polarity-specific protection (e.g., single-supply rails) | Choose only if circuit topology mandates unidirectional clamping; otherwise 1.5KE18CAHE3_B/C offers broader flexibility |
Compared with SMBJ18CA and 1.5KE18AHE3_B/C, the 1.5KE18CAHE3_B/C uniquely combines 1500 W surge capacity, bidirectional symmetry, and AEC-Q101 qualification in an axial package - making it optimal for high-energy, polarity-agnostic protection in automotive and industrial power systems where layout flexibility and ruggedness are prioritized over footprint size.
Availability
1.5KE18CAHE3_B/C is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom line card manufacturing requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE18CAHE3_B/C 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance across temperature extremes and extended service life under repetitive surge stress.
FAQ
What is the clamping voltage of the 1.5KE18CAHE3_B/C under maximum surge conditions?
The 1.5KE18CAHE3_B/C clamps to 25.2 V at its rated peak pulse current of 59.5 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures downstream components see no more than 25.2 V during worst-case transient events. The low clamping ratio (VC/VBR ≈ 1.4) reflects efficient avalanche energy absorption - a key design advantage of the 1.5KE18CAHE3_B/C over higher-VC alternatives.
Is the 1.5KE18CAHE3_B/C suitable for automotive applications?
Yes, the 1.5KE18CAHE3_B/C is AEC-Q101 qualified (confirmed by the HE3 suffix) and rated for operation from -55 °C to +175 °C junction temperature. It meets automotive surge immunity requirements including ISO 7637-2 and is widely deployed in engine control modules, body electronics, and ADAS sensor interfaces. The 1.5KE18CAHE3_B/C also passes JESD 201 Class 2 whisker testing and solder dip at 275 °C for 10 s - validating its suitability for reflow and wave soldering in automotive production.
How does the bidirectional configuration of the 1.5KE18CAHE3_B/C affect circuit design?
The 1.5KE18CAHE3_B/C has no polarity marking and functions identically in both directions - simplifying layout for AC-coupled lines, differential buses (e.g., RS-485), or floating grounds. Unlike unidirectional TVS diodes, it eliminates risk of incorrect orientation during assembly and provides symmetrical clamping for positive and negative transients. This makes the 1.5KE18CAHE3_B/C ideal for protecting bidirectional signal paths where voltage reversals occur, such as in telecom line interfaces or half-bridge motor controls.
What is the maximum steady-state power dissipation of the 1.5KE18CAHE3_B/C?
The 1.5KE18CAHE3_B/C has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at lead temperature TL = 75 °C. In typical PCB mounting, derating applies per Figure 5 - e.g., at TL = 100 °C, PD drops to ~4.5 W. This rating governs continuous leakage or bias power, not transient events; the 1.5KE18CAHE3_B/C is designed for short-duration surges, not sustained overvoltage conditions.
Does the 1.5KE18CAHE3_B/C require external heat sinking?
No external heat sink is required for transient suppression duty, as the 1500 W pulse is applied for ≤1 ms with ≤0.01 % duty cycle. However, thermal resistance from junction to lead is 15.4 °C/W, so PCB copper area around the leads acts as the primary heat path. For high-frequency surge repetition or elevated ambient temperatures, increasing copper pour area or using thermal vias improves reliability. The 1.5KE18CAHE3_B/C's axial package relies on lead conduction - not case surface - for thermal transfer, distinguishing it from surface-mount TVS devices.
1.5KE18CAHE3_B/C 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:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 60A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE18CAHE3_B/C FAQ
1.How can I place an order for 1.5KE18CAHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18CAHE3_B/C 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 1.5KE18CAHE3_B/C reliable?
The price and inventory of 1.5KE18CAHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE18CAHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE18CAHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18CAHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18CAHE3_B/C?
1.5KE18CAHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18CAHE3_B/C 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 1.5KE18CAHE3_B/C?
For technical support, including 1.5KE18CAHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18CAHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE18CAHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE18CAHE3_B/C 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 1.5KE18CAHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE18CAHE3_B/C?
All 1.5KE18CAHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18CAHE3_B/C, 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 1.5KE18CAHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE18CAHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18CAHE3_B/C Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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