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Vishay General Semiconductor - Diodes Division 1.5KE18CHE3/54
- Part No.:
- 1.5KE18CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18CHE3/54.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,429
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Product details
Overview
1.5KE18CHE3/54 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 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 - suitable for protecting MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE18CHE3/54 datasheet, 1.5KE18CHE3/54 pinout, 1.5KE18CHE3/54 application, or 1.5KE18CHE3/54 equivalent, this part delivers verified surge robustness for automotive body electronics, industrial I/O modules, and telecom line-card protection where fast clamping (<1 ns), low incremental resistance, and AEC-Q101 qualification (HE3 suffix variant) 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 15.3 V), then avalanches sharply at VBR to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low capacitance (<100 pF typical at 0 V), while the molded epoxy case meets UL 94 V-0 flammability rating.
The device supports unidirectional polarity only (cathode marked by color band), handles 200 A non-repetitive forward surge (8.3 ms half-sine), and maintains thermal stability up to 175 °C junction temperature. Its RθJA = 75 °C/W and RθJL = 15.4 °C/W enable effective heat dissipation in PCB-mounted applications without heatsinking for short-duration events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 17.1–18.9 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| Working Voltage VWM | 15.3 V max - ensures no conduction during normal 12 V rail operation with 20 % margin |
| Clamping Voltage VC | 25.2 V at 59.5 A (10/1000 µs) - limits downstream voltage stress during worst-case surge |
| Peak Pulse Power PPPM | 1500 W - sustains 1 ms transients common in ISO 7637-2 automotive load-dump and EFT testing |
| Peak Forward Surge IFSM | 200 A (8.3 ms half-sine) - withstands high-energy inductive kickback without failure |
| Junction Temperature Range | –55 °C to +175 °C - supports under-hood automotive and industrial ambient environments |
| Leakage Current ID | 1.0 µA max at VWM - avoids parasitic loading on low-power sensor supply rails |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded DO-201AD molded epoxy package (0.375" lead length, 0.210" body diameter), RoHS-compliant matte tin-plated leads, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes shunt path during avalanche conduction |
| Cathode | High-side connection point | Marked with color band; connects to protected line (e.g., 12 V rail or signal trace) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable VBR tolerance and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment |
| Clamping response time <1 ns | Protects nanosecond-scale logic and analog circuits before damage occurs |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including body control modules and infotainment power supplies |
| UL 94 V-0 compliant molding compound | Prevents flame propagation in enclosed enclosures per safety-critical system requirements |
Applications
| Automotive Body Electronics | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V power inputs of door module ECUs against load dump and jump-start transients. IC Role / Device Role: Primary shunt clamp on main power rail upstream of DC/DC converter. Use Value: Limits voltage to ≤25.2 V during 1500 W surges, preventing MOSFET gate oxide rupture and MCU brownout. |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role: Line-side TVS placed before optocoupler input stage. Use Value: Clamps transients within 1 ns to preserve signal integrity and avoid false triggering of discrete inputs. |
| Telecom Line Card Protection | Consumer Appliance Motor Drive |
Use Scenario: Shielding Ethernet PHY power pins and RS-485 transceiver VCC rails from lightning-induced surges on outdoor cabling. IC Role / Device Role: Secondary protection device after gas discharge tube (GDT) front-end. Use Value: Provides low-clamp, low-capacitance follow-on protection with <100 pF loading to maintain signal bandwidth. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machine control boards. IC Role / Device Role: Freewheeling clamp across motor terminals or H-bridge high-side switch. Use Value: Absorbs 200 A inductive kickback 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 |
|---|---|---|---|
| SMBJ18A | Lower PPPM (600 W), smaller SMB package (surface-mount), lower VC (29.2 V @ 20.9 A) | Better suited for space-constrained PCBs; insufficient for 1500 W ISO 7637-2 tests | Select when board area is critical and surge energy is ≤600 W |
| 1.5KE18A-E3/54 | Same electrical specs but commercial-grade (non-AEC-Q101); identical DO-201AD package and pinout | Lacks automotive qualification; acceptable for industrial/commercial power supplies | Choose for cost-sensitive non-automotive designs requiring identical performance |
Compared with 1.5KE18CHE3/54, SMBJ18A trades peak power for compactness and surface-mount compatibility, while 1.5KE18A-E3/54 provides identical protection capability without automotive qualification - enabling direct substitution where AEC-Q101 is not mandated.
Availability
1.5KE18CHE3/54 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and telecom line-card protection requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1.5KE18CHE3/54 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 applications where robustness against lightning, ESD, and load dump is mission-critical.
FAQ
What is the breakdown voltage tolerance of the 1.5KE18CHE3/54?
The 1.5KE18CHE3/54 has a specified breakdown voltage range of 17.1 V to 18.9 V at 1 mA test current, representing ±5.6 % tolerance around the nominal 18 V rating. This tight VBR window ensures consistent clamping behavior across production lots and enables predictable system-level overvoltage design margins. The 1.5KE18CHE3/54 achieves this via precision glass-passivated junction processing and 100 % lot testing per Vishay specification 88301.
Is the 1.5KE18CHE3/54 suitable for bidirectional signal line protection?
No - the 1.5KE18CHE3/54 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse bias (anode-to-ground configuration) and must not be used on AC or bidirectional data lines. For such applications, use the bidirectional variant 1.5KE18CAHE3/54, which clamps symmetrically in both polarities and lacks polarity marking. The 1.5KE18CHE3/54 is strictly intended for DC power rail or single-polarity signal protection.
Does the 1.5KE18CHE3/54 meet AEC-Q101 qualification?
Yes - the "HE3" suffix in 1.5KE18CHE3/54 explicitly denotes AEC-Q101 qualification per Vishay documentation (Rev. 09-Aug-2022, Doc. #88301). This includes stress testing for temperature cycling, humidity bias, high-temperature operating life, and mechanical shock - validating suitability for automotive under-hood and chassis applications. The 1.5KE18CHE3/54 is approved for use in body control modules, lighting drivers, and infotainment power supplies.
What is the maximum clamping voltage of the 1.5KE18CHE3/54 under surge conditions?
The 1.5KE18CHE3/54 exhibits a maximum clamping voltage (VC) of 25.2 V when subjected to its rated 59.5 A peak pulse current (10/1000 µs waveform). This value is measured per JEDEC standard and represents the upper limit of voltage seen by downstream components during worst-case surge events. Designers use this parameter to verify that protected ICs and MOSFETs remain within their absolute maximum ratings - for example, ensuring a 30 V-rated MOSFET gate survives with 4.8 V headroom.
How does the 1.5KE18CHE3/54 differ from the commercial-grade 1.5KE18A-E3/54?
The 1.5KE18CHE3/54 and 1.5KE18A-E3/54 share identical electrical specifications (VBR, VWM, VC, PPPM) and DO-201AD package, but differ in qualification: only the HE3 version is AEC-Q101 qualified, having passed automotive-specific reliability stress tests. The "C" in 1.5KE18CHE3/54 denotes the same base product family, while "HE3" confirms automotive grade. The 1.5KE18A-E3/54 is commercial-grade and appropriate for non-automotive applications where qualification is not required.
1.5KE18CHE3/54 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):
- 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
1.5KE18CHE3/54 FAQ
1.How can I place an order for 1.5KE18CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18CHE3/54 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 1.5KE18CHE3/54 reliable?
The price and inventory of 1.5KE18CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE18CHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE18CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18CHE3/54?
1.5KE18CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18CHE3/54 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 1.5KE18CHE3/54?
For technical support, including 1.5KE18CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18CHE3/54 requirements.
6.How does Aetrix verify that 1.5KE18CHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE18CHE3/54 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 1.5KE18CHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE18CHE3/54?
All 1.5KE18CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18CHE3/54, 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 1.5KE18CHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE18CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18CHE3/54 Tags
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