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Vishay General Semiconductor - Diodes Division ICTE18HE3/51
- Part No.:
- ICTE18HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
ICTE18HE3/51.pdf
- Description:
- TVS DIODE 18VWM 25.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,387
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Product details
Overview
ICTE18HE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in the 1.5KE package, rated for 18 V stand-off voltage (VWM), 21.2 V minimum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 μs). It clamps transients to ≤24.8 V at 1 A and ≤25.5 V at 10 A, with AEC-Q101 qualification for automotive-grade reliability. It protects signal lines and power rails in sensor interfaces and industrial control systems.
For engineers reviewing the ICTE18HE3/51 datasheet, ICTE18HE3/51 pinout, ICTE18HE3/51 application, or ICTE18HE3/51 equivalent, key selection criteria include bi-directional clamping capability, 175 °C max junction temperature, JEDEC-registered 1.5KE case compatibility, low incremental surge resistance, and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability.
Technical Context
This device operates as a voltage-clamped transient protector in both polarities, leveraging a glass-passivated silicon junction to achieve fast response (<1 ns) and stable clamping under repetitive 10/1000 μs surges at 0.01 % duty cycle. Its bi-directional symmetry ensures identical VBR (21.2 V min), VC (24.8 V @ 1 A), and IPPM (50 A) in positive and negative directions.
The ICTE18HE3/51 is thermally rated for TJ = −55 °C to +175 °C and dissipates 6.5 W on an infinite heatsink at TL = 75 °C. It meets AEC-Q101 stress testing for automotive environments and supports lead-free reflow per JESD 22-B106 (275 °C, 10 s max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18.0 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 15–18 V DC rails. |
| VBR (min) | 21.2 V - Minimum breakdown voltage at 1.0 mA; guarantees clamping activation above normal operating voltage with margin. |
| VC @ 1 A | 24.8 V - Clamping voltage at low-surge condition; determines protection threshold for sensitive logic-level interfaces. |
| VC @ 10 A | 25.5 V - Clamping voltage at high-energy transient; confirms robust suppression during ESD or inductive switching events. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| Qualification | AEC-Q101 - Qualified for automotive applications including engine control units and ADAS sensor modules. |
Pinout & Package
Package: 1.5KE molded epoxy case (JEDEC TO-201AA), axial-leaded, RoHS-compliant, matte tin-plated leads. Bi-directional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Either lead serves as input/output; no cathode band - identical electrical behavior in both directions. |
| Lead 1 | Terminal for PCB mounting and thermal conduction | Matte tin plating ensures solderability per J-STD-002; 0.038–0.042" diameter supports mechanical retention and heat dissipation. |
| Lead 2 | Terminal for PCB mounting and thermal conduction | Same specification as Lead 1; symmetric layout allows flexible board placement without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable VBR over lifetime and improved humidity resistance vs. non-passivated alternatives. |
| 1500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in industrial and automotive power inputs. |
| AEC-Q101 qualification | Validates reliability for automotive electronics including body control modules and infotainment power supplies. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving system-level EMI resilience. |
| Junction capacitance <200 pF | Preserves signal integrity on data lines up to ~10 MHz; suitable for CAN, LIN, and analog sensor interfaces. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standby-mode voltage clamp that activates only during overvoltage events; no DC loading or timing function. Use Value: Maintains sensor accuracy by limiting transient excursions to ≤25.5 V, preventing ADC saturation or op-amp rail-to-rail latch-up. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Passive bidirectional shunt protector placed across input terminals; zero latency response. Use Value: Enables >100,000 actuation cycles without degradation, validated per AEC-Q101 temperature cycling and HTRB tests. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Secondary-side transient suppression on RS-485 or Ethernet PHY power rails in telecom base stations. IC Role / Device Role / Timing Role: High-energy clamping element parallel to DC-DC converter input; no signal conditioning role. Use Value: Withstands repeated 10/1000 μs surges up to 50 A without parameter shift, ensuring long-term interface stability. |
Use Scenario: Input-stage surge protection in wall-mounted AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Primary transient absorber upstream of bridge rectifier; activated only during line surges. Use Value: UL 94 V-0 epoxy housing prevents flame propagation during catastrophic failure, meeting IEC 62368-1 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | DO-214AA package; lower PPPM (600 W); same VWM/VBR/VC specs; higher junction capacitance (~350 pF) | Better suited for space-constrained PCBs but limited to lower-energy transients; not AEC-Q101 qualified | Select when board area is critical and surge energy stays below 600 W; verify layout thermal relief for SMB footprint. |
| 1N6386 | Same 1.5KE package and electrical specs; commercial-grade (no HE3 suffix); lacks AEC-Q101 qualification and JESD 201 Class 2 whisker test | Acceptable for non-automotive industrial use where extended temperature cycling and long-term whisker resistance are not required | Choose for cost-sensitive consumer or legacy industrial designs where AEC-Q101 is not mandated. |
Compared with SMBJ18CA and 1N6386, the ICTE18HE3/51 uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and 1.5KE mechanical robustness - making it the only option qualified for under-hood automotive power rail protection requiring sustained 175 °C operation and traceable whisker resistance.
Availability
ICTE18HE3/51 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply, long-lifecycle support, and AEC-Q101 compliance.
Supply support for ICTE18HE3/51 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 TVS devices with emphasis on reliability, power handling, and automotive qualification.
The ICTE series was engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge capability are mandatory.
FAQ
What is the polarity configuration of ICTE18HE3/51?
The ICTE18HE3/51 is a bi-directional Transient Voltage Suppressor with symmetrical anode/cathode terminals. It has no polarity marking on the body and provides identical clamping performance in both directions - confirmed by VBR = 21.2 V (min) and VC = 24.8 V @ 1 A in either polarity per Vishay Document 88356.
Is ICTE18HE3/51 qualified for automotive applications?
Yes, ICTE18HE3/51 carries the HE3 suffix, indicating full AEC-Q101 qualification per Vishay's documentation. It passes stress tests including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing - making it suitable for engine control, ADAS, and body electronics where 175 °C operation is required.
What is the maximum clamping voltage of ICTE18HE3/51 at 10 A?
The maximum clamping voltage of ICTE18HE3/51 at 10 A peak pulse current (10/1000 μs waveform) is 25.5 V, as specified in the "ELECTRICAL CHARACTERISTICS" table of Vishay Document 88356. This value ensures protected circuits remain within safe voltage limits during high-energy transients.
Does ICTE18HE3/51 have RoHS and lead-free compliance?
Yes, ICTE18HE3/51 is RoHS-compliant and lead-free. The "E3" in its part number denotes RoHS compliance and commercial grade, while "HE3" adds AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - all verified in Vishay's ordering information and mechanical data sections.
What package type does ICTE18HE3/51 use?
ICTE18HE3/51 uses the 1.5KE axial-leaded package (JEDEC TO-201AA), with 0.038–0.042" lead diameter, 0.375" lead length, and UL 94 V-0 compliant molded epoxy body. Dimensions and tolerances are fully specified in the "PACKAGE OUTLINE DIMENSIONS" section of Vishay Document 88356.
ICTE18HE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 21.2V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 50A
- 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
ICTE18HE3/51 FAQ
1.How can I place an order for ICTE18HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICTE18HE3/51 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 ICTE18HE3/51 reliable?
The price and inventory of ICTE18HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICTE18HE3/51 is usually 5 days.
3.What payment methods are accepted for ICTE18HE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICTE18HE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICTE18HE3/51?
ICTE18HE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICTE18HE3/51 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 ICTE18HE3/51?
For technical support, including ICTE18HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICTE18HE3/51 requirements.
6.How does Aetrix verify that ICTE18HE3/51 is sourced from the original manufacturer or authorized distributors?
All ICTE18HE3/51 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 ICTE18HE3/51 meets industry standards.
7.What is the process for return or replacement of ICTE18HE3/51?
All ICTE18HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with ICTE18HE3/51, 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 ICTE18HE3/51 part is unused and in its original packaging.
Return procedure for ICTE18HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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