onsemi ICTE-018G

Overview

ICTE-018G from onsemi is a unidirectional 1500 W peak power TVS diode designed to protect voltage-sensitive circuits against high-energy transients. It features a 18 V working peak reverse voltage (VRWM), 24.2 V clamping voltage at 30 A peak pulse current, <5 µA leakage above 10 V, sub-1 ns response time, and ESD rating >16 kV per HBM - deployed in industrial power supplies and medical equipment input protection.

For engineers reviewing the ICTE-018G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, clamping voltage vs. IC absolute maximum ratings, surge current capability under 8.3 ms waveform, and axial leaded Surmetic package thermal performance in PCB-mounted transient suppression layouts.

Technical Context

This device operates as a unidirectional Zener-based transient voltage suppressor with avalanche breakdown behavior. Its 21.2 V nominal breakdown voltage (VBR) at 1 mA test current and 24.2 V clamping voltage at 30 A IPP define its protection window for 18 V DC rails.

Thermal design relies on junction-to-lead resistance of 20 °C/W and steady-state power dissipation of 5.0 W at TL ≤ 75°C. The axial leaded CASE 41A package supports manual or wave soldering at 260°C for 10 seconds at 1/16″ from case.

Key Specifications

Pinout & Package

ICTE-018G uses an axial-leaded Surmetic plastic package (CASE 41A), with cathode identified by a polarity band. Leads are corrosion-resistant and readily solderable, rated for 260°C for 10 seconds at 1/16″ from case.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with SMBJ18A and 1N6377RLG, ICTE-018G delivers superior 1500 W surge handling in an axial through-hole package ideal for high-reliability industrial power entry points, while maintaining precise 18 V standoff and 24.2 V clamping alignment with common 24 V system architectures.

Availability

ICTE-018G is available at Aetrix Electronics and suitable for industrial power supplies, medical equipment interfaces, numerical control systems, and business machine DC bus protection requiring stable component supply and long-term obsolescence management.

Supply support for ICTE-018G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The ICTE-018G belongs to onsemi's Mosorb TVS family, engineered specifically for high-reliability transient suppression in harsh industrial and medical environments where axial-leaded robustness and 1500 W surge capability are critical.

FAQ

What is the maximum clamping voltage of ICTE-018G at its rated peak pulse current?

The ICTE-018G has a maximum clamping voltage (VC) of 24.2 V when subjected to its rated peak pulse current of 30 A under the standard 8.3 ms waveform. This value is measured per Figure 5 in the official datasheet and defines the upper voltage limit imposed on protected circuitry during transient events. Maintaining VC below the absolute maximum ratings of downstream components is essential for reliable operation - the ICTE-018G's 24.2 V VC makes it well-suited for safeguarding 24 V nominal systems with 25 V-tolerant ICs.

Is ICTE-018G compatible with lead-free soldering processes?

Yes, ICTE-018G is supplied in a Pb-free Surmetic axial package and qualified for lead-free soldering at 260°C for 10 seconds measured 1/16″ from the case body. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for through-hole components and does not require pre-baking prior to wave or hand soldering. Its thermosetting plastic case remains dimensionally stable under these conditions, ensuring mechanical integrity and long-term reliability in production environments using RoHS-compliant assembly flows.

How does the VRWM of ICTE-018G relate to system operating voltage?

The ICTE-018G has a working peak reverse voltage (VRWM) of 18 V, meaning it remains in high-impedance blocking mode up to this DC or continuous peak voltage. For proper protection, VRWM must be selected equal to or slightly greater than the maximum steady-state voltage present on the line being protected - for example, a 15–18 V DC rail or 12 V AC RMS input (≈17 V peak). Selecting ICTE-018G for such rails ensures minimal leakage (<2 µA) during normal operation while guaranteeing rapid clamping if transients exceed 21.2 V (VBR min).

Can ICTE-018G be used in bidirectional configurations?

No, ICTE-018G is a unidirectional TVS diode and must be used with correct polarity - cathode connected toward the protected voltage rail and anode to ground. It does not provide symmetrical clamping for AC signals or reverse-polarity transients. For bidirectional protection, two ICTE-018G devices may be connected in series opposition, or a dedicated bidirectional part such as the P6SMB18CA should be selected. Using ICTE-018G in reverse bias beyond its VRWM will result in premature conduction and potential failure.

What thermal derating applies to ICTE-018G in continuous operation?

ICTE-018G has a steady-state power dissipation (PD) rating of 5.0 W at lead temperature (TL) ≤ 75°C, with derating at 20 mW/°C above that temperature. Its junction-to-lead thermal resistance is 20 °C/W, so under sustained 1 W power dissipation, the junction rises ~20°C above lead temperature. In practice, ICTE-018G is intended for transient-only duty; continuous DC power dissipation should be avoided. For designs requiring frequent surges, ensure adequate PCB copper area and airflow to maintain TL ≤ 75°C and preserve long-term reliability of the ICTE-018G.