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Vishay General Semiconductor - Diodes Division 1.5KE18C-E3/73
- Part No.:
- 1.5KE18C-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18C-E3/73.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,748
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Product details
Overview
1.5KE18C-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal and power lines. It features a 1500 W peak pulse power rating (10/1000 µs), 17.1 V to 18.9 V breakdown voltage range at 1 mA test current, 15.3 V maximum standoff voltage, and clamps to ≤25.2 V at 59.5 A peak pulse current. It is used in automotive sensor interfaces and industrial I/O protection where fast response (<1 ns) and robust surge handling are required.
For engineers reviewing the 1.5KE18C-E3/73 datasheet, 1.5KE18C-E3/73 pinout, 1.5KE18C-E3/73 application, or 1.5KE18C-E3/73 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package dimensions, thermal resistance data (RθJA = 75 °C/W), and AEC-Q101-qualified alternatives - all critical for ESD/lightning transient design validation and BOM selection.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, enabling bidirectional clamping without polarity marking. Its 10/1000 µs waveform response delivers 1500 W peak pulse power dissipation while maintaining low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.48).
It supports unidirectional and bidirectional configurations; the "C" suffix explicitly denotes bidirectional functionality. The 1.5KE18C-E3/73 is RoHS-compliant (E3 suffix), meets JESD 201 Class 1A whisker testing, and is rated for -55 °C to +175 °C operating junction temperature.
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 transient detection |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | ≤25.2 V at 59.5 A - clamping voltage under full 1500 W surge, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, enabling lightning-level surge immunity |
| TJ max | +175 °C - high-temperature operation support for under-hood automotive and industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, informing heatsinking requirements for repetitive surges |
| Package | JEDEC DO-201AD (1.5KE) - axial-leaded, epoxy-molded case with UL 94 V-0 flammability rating |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads. No polarity marking - bidirectional operation confirmed by "C" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked ends) | Transient conduction path | Identical terminals - symmetrical bidirectional clamping; no cathode band; connects across protected line and ground or differential pair |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature cycling |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive ports |
| Response time <1 ns | Clamps transients before sensitive logic or analog circuitry sustains damage |
| AEC-Q101 qualified option available | Validated reliability for automotive ECUs, sensor modules, and infotainment power rails |
| UL 94 V-0 compliant molding compound | Prevents flame propagation in enclosed enclosures during fault conditions |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Ports |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground, absorbing ±25.2 V transients within nanoseconds. Use Value: Prevents latch-up or gate oxide rupture in 3.3 V/5 V interface ICs during vehicle battery disconnection events. | Use Scenario: Shielding digital input modules from induced surges on 24 V DC field wiring exposed to motor switching noise. IC Role / Device Role / Timing Role: Standoff protector on dry-contact or optocoupler input stage, conducting only when line-to-ground voltage exceeds 15.3 V. Use Value: Enables >100,000 actuation cycles without degradation, validated per IEC 61000-4-5 2 Ω/12 Ω coupling network tests. |
| Telecom Line Interface | Consumer Power Adapter EMI Filtering |
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE controller ICs against lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary shunt suppressor across secondary-side DC output rails (e.g., 12 V PoE), clamping to ≤25.2 V before regulator overvoltage shutdown. Use Value: Maintains system uptime during Category C (1 kV/2 kV) telecom surge events without requiring reset or fuse replacement. | Use Scenario: Secondary-side transient suppression in AC/DC adapters for smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Fast-acting clamp on 5 V USB output rail, triggered by ESD discharge or capacitor discharge transients from hot-plug events. Use Value: Eliminates need for additional RC snubbers or ferrite beads while meeting IEC 61000-4-2 Level 4 (8 kV contact) compliance. |
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, SMC package (smaller footprint), lower IPPM (32.4 A), same VBR range (16.2–19.8 V) | Preferred for space-constrained PCBs; not rated for 1500 W surges | Select SMBJ18CA when board area is limited and surge threat level is ≤600 W (e.g., consumer USB ports) |
| 1.5KE18CAHE3_B | Identical electrical specs; AEC-Q101 qualified, HE3 suffix indicates higher reliability screening and JESD 201 Class 2 whisker resistance | Required for automotive OEM production; supports extended temperature and vibration validation | Choose 1.5KE18CAHE3_B for Tier 1 automotive designs needing PPAP documentation and long-term supply assurance |
Compared with 1.5KE18C-E3/73, SMBJ18CA trades peak power capability for compactness, while 1.5KE18CAHE3_B provides identical protection performance with certified automotive-grade reliability - enabling direct substitution where qualification status drives sourcing decisions.
Availability
1.5KE18C-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line conditioning, and consumer power adapter EMI filtering requiring stable component supply and consistent surge performance across production batches.
Supply support for 1.5KE18C-E3/73 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, 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 1500 W surge immunity and wide temperature operation are mandatory.
FAQ
What is the clamping voltage of the 1.5KE18C-E3/73 under maximum surge conditions?
The 1.5KE18C-E3/73 clamps to a maximum 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 standards and ensures downstream 3.3 V or 5 V ICs remain within absolute maximum ratings during transient events. The clamping voltage is guaranteed across the full operating temperature range (-55 °C to +175 °C).
Is the 1.5KE18C-E3/73 bidirectional or unidirectional?
The 1.5KE18C-E3/73 is explicitly bidirectional, as indicated by the "C" suffix in its part number. It provides symmetrical clamping in both forward and reverse directions, with no polarity marking on the leads. This makes it suitable for protecting AC-coupled lines, differential buses like CAN, or any application where voltage transients may occur with either polarity relative to ground.
Does the 1.5KE18C-E3/73 meet automotive qualification standards?
The base 1.5KE18C-E3/73 is commercial-grade and RoHS-compliant (E3 suffix), but not AEC-Q101 qualified. However, the functionally identical 1.5KE18CAHE3_B variant is AEC-Q101 qualified and shares the same electrical specifications. For automotive production, engineers should specify the HE3_B version to meet OEM reliability and qualification requirements.
What is the standoff voltage rating for the 1.5KE18C-E3/73?
The 1.5KE18C-E3/73 has a maximum standoff voltage (VWM) of 15.3 V, meaning it remains non-conductive with leakage current <1 μA up to this DC or RMS voltage. This allows safe integration into 12 V systems where normal operating voltage must not trigger clamping, while still providing margin for tolerance and ripple before avalanche onset at 17.1 V minimum VBR.
Can the 1.5KE18C-E3/73 be used in parallel to increase surge handling capacity?
Yes, the 1.5KE18C-E3/73 can be paralleled to increase total peak pulse power handling, but only with careful layout: matched trace lengths, symmetric thermal paths, and derating per manufacturer guidance (typically 10–20 % per added device). Parallel use is documented in Vishay's application notes for achieving >1500 W protection on high-risk lines such as AC mains inputs or antenna feeds.
1.5KE18C-E3/73 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE18C-E3/73 FAQ
1.How can I place an order for 1.5KE18C-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18C-E3/73 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 1.5KE18C-E3/73 reliable?
The price and inventory of 1.5KE18C-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE18C-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE18C-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18C-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18C-E3/73?
1.5KE18C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18C-E3/73 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 1.5KE18C-E3/73?
For technical support, including 1.5KE18C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18C-E3/73 requirements.
6.How does Aetrix verify that 1.5KE18C-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE18C-E3/73 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 1.5KE18C-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE18C-E3/73?
All 1.5KE18C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18C-E3/73, 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 1.5KE18C-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE18C-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18C-E3/73 Tags
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