ICTE18C-E3/54 Equivalent & Substitute Parts

Part Overview

The ICTE18C-E3/54 is a bidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, rated for 18V reverse standoff voltage with a 25.5V maximum clamping voltage at peak pulse current. This component is designed for general-purpose transient protection in through-hole applications using the DO-201AA/DO-27 axial package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

ICTE18C-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1137ICTE18C-E3/54 Datasheet

Current PartRFQ

1.5KE22CA-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 132351.5KE22CA-E3/54 Datasheet

MFR RecommendedRFQ

1.5KE18CA

Taiwan Semiconductor CorporationIn Stock: 123661.5KE18CA Datasheet

MFR RecommendedRFQ

1.5KE18CA-TP

Micro Commercial CoIn Stock: 8711.5KE18CA-TP Datasheet

MFR RecommendedRFQ

1N6150

Microchip TechnologyIn Stock: 8091N6150 Datasheet

MFR RecommendedRFQ

P5KE15CA-TP

Micro Commercial CoIn Stock: 926P5KE15CA-TP Datasheet

MFR RecommendedRFQ

P6KE18CA

Diotec SemiconductorIn Stock: 20652P6KE18CA Datasheet

MFR RecommendedRFQ

SA15CA-B

Littelfuse Inc.In Stock: 783SA15CA-B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ICTE18C-E3/54 is determined by the following critical parameters:

Primary Substitution Criteria:

• Bidirectional Zener TVS diode type
• Voltage - Reverse Standoff: 15V to 18.8V range
• Voltage - Clamping (Max) @ Ipp: 24.4V to 30.6V range
• Current - Peak Pulse (10/1000µs): minimum 20A
• Power - Peak Pulse: 500W to 1500W
• Operating Temperature: -55°C to 175°C minimum
• Through-hole axial mounting configuration

Package Compatibility: Substitutes are grouped into two categories based on package type:

• DO-201AA/DO-27 Axial Package (direct mechanical replacement)
• DO-15/DO-204AC Axial Package (alternative through-hole axial, requires PCB layout verification)

The obsolete status of the main part necessitates selection from active product status alternatives to ensure long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Replacement (DO-201AA/DO-27 Package):

1.5KE22CA-E3/54 (Vishay) is the primary recommended substitute. It maintains the same manufacturer lineage, package form factor, and active product status. Electrical parameters remain within acceptable tolerance: reverse standoff voltage increases to 18.8V, clamping voltage rises to 30.6V, and peak pulse current remains at 49A. ROHS3 compliance is maintained.

1.5KE18CA (Taiwan Semiconductor) provides an alternative with identical package compatibility. Peak pulse current increases to 60A with clamping voltage at 25.5V, matching the original specification. Active product status ensures supply continuity.

Tier 2 - Alternative Package (DO-15/DO-204AC Package):

P6KE18CA (Diotec Semiconductor) and SA15CA-B (Littelfuse Inc.) offer substitution with reduced power rating (600W and 500W respectively) and lower peak pulse current (25A and 20.9A). These are suitable only for applications where the 1500W power dissipation is not required. Both maintain ROHS3 compliance and active product status.

P5KE15CA-TP (Micro Commercial Co) provides the lowest power option (500W) with 20.6A peak pulse current. Selection of this part requires verification that application transient energy does not exceed 500W peak pulse rating.

Compliance Considerations:

1N6150 (Microchip Technology) is RoHS non-compliant and should be avoided in applications requiring RoHS3 certification. All other substitutes maintain ROHS3 compliance status.

Frequently Asked Questions (FAQ)

Q: Can I use 1.5KE22CA-E3/54 as a direct replacement for ICTE18C-E3/54?

A: Yes. Both parts use the DO-201AA/DO-27 axial package, operate across -55°C to 175°C, and maintain 1500W peak pulse power rating. The 1.5KE22CA-E3/54 has a slightly higher reverse standoff voltage (18.8V vs 18V) and clamping voltage (30.6V vs 25.5V), which provides equivalent or improved transient suppression performance. Active product status ensures ongoing availability.

Q: What is the difference between DO-201AA/DO-27 and DO-15/DO-204AC packages?

A: Both are through-hole axial packages with different physical dimensions. DO-201AA/DO-27 is larger and accommodates higher power dissipation. DO-15/DO-204AC is smaller and typically used in lower-power applications. PCB layout and thermal design must be verified before substituting between these package types.

Q: Can I use P5KE15CA-TP or SA15CA-B instead of the original part?

A: These parts are suitable only if your application transient energy does not exceed 500W peak pulse power. The original ICTE18C-E3/54 is rated for 1500W. Verify that your circuit protection requirements do not demand the full 1500W capability before selecting these lower-power alternatives.

Q: Why is 1N6150 not recommended despite having similar electrical parameters?

A: 1N6150 is RoHS non-compliant, making it unsuitable for applications requiring RoHS3 certification. All other recommended substitutes maintain ROHS3 compliance status.

Q: What is the impact of using a substitute with higher clamping voltage?

A: Higher clamping voltage (such as 1.5KE22CA-E3/54 at 30.6V versus the original 25.5V) provides more margin before voltage suppression occurs. This is acceptable in most general-purpose transient protection applications. Verify that your protected circuit can tolerate the higher clamping voltage threshold.

Q: Are all substitute parts available in active production?

A: Yes. All recommended substitutes have active product status, ensuring supply chain continuity and long-term availability. The original ICTE18C-E3/54 is obsolete, making substitution necessary for new designs and ongoing procurement.