ICT-15 Equivalent & Substitute Parts

Part Overview

The ICT-15 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This through-hole component operates with a 15V reverse standoff voltage and delivers 60A peak pulse current with 1500W peak pulse power dissipation. The part is currently active in production and available in bulk packaging.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across different manufacturers and package configurations. The ICT-15 is available in limited inventory (931 pcs), making substitute identification valuable for procurement flexibility and supply chain continuity.

Substiute Parts

ICT-15

Microchip TechnologyIn Stock: 987ICT-15 Datasheet

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1.5KE18A

Taiwan Semiconductor CorporationIn Stock: 33821.5KE18A Datasheet

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1.5KE20A

Taiwan Semiconductor CorporationIn Stock: 304131.5KE20A Datasheet

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LCE15A

Littelfuse Inc.In Stock: 2372LCE15A Datasheet

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LCE16A

Littelfuse Inc.In Stock: 2686LCE16A Datasheet

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LCE18A

Littelfuse Inc.In Stock: 1007LCE18A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ICT-15 are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Unidirectional Zener TVS diode topology (1 channel)
• Reverse standoff voltage within the 15V to 18V range
• Peak pulse current capability of 51A to 61A
• Peak pulse power rating of 1500W
• Through-hole mounting configuration
• General-purpose overvoltage protection application class
• Operating temperature range spanning -55°C to 175°C minimum

Package Compatibility: Substitute parts are available in DO-201 (DO-201AA, DO-27, Axial) package configurations, which differ from the ICT-15's DO-13 package. Both package types are through-hole mounted and suitable for PCB assembly in equivalent circuit positions, though physical footprint differences require board layout verification.

Compliance Considerations: Substitute parts from Taiwan Semiconductor Corporation (1.5KE series) and Littelfuse Inc. (LCE series) carry ROHS3 compliance certification, whereas the ICT-15 is RoHS non-compliant. All parts maintain REACH Unaffected status and EAR99 export classification.

Parameter Comparison

Engineering Selection Recommendations

LCE15A (Littelfuse Inc.) provides the closest electrical match to the ICT-15, with identical 15V reverse standoff voltage and comparable 61A peak pulse current. This part carries ROHS3 compliance certification and maintains active production status with 2343 pcs inventory availability. The DO-201 package requires PCB layout modification from the original DO-13 footprint.

1.5KE18A (Taiwan Semiconductor Corporation) offers equivalent 60A peak pulse current and 1500W power rating with 15.3V reverse standoff voltage. ROHS3 compliance and high inventory availability (3300 pcs) support procurement continuity. The higher clamping voltage (25.5V) requires circuit-level evaluation for overvoltage margin compatibility.

1.5KE20A (Taiwan Semiconductor Corporation) maintains 1500W peak pulse power with 56A peak pulse current and 17.1V reverse standoff voltage. Highest inventory availability (30400 pcs) ensures supply chain stability. ROHS3 compliance applies. The elevated clamping voltage (27.7V) and reduced peak pulse current necessitate application-specific assessment.

LCE16A and LCE18A (Littelfuse Inc.) represent higher voltage alternatives with 16V and 18V standoff ratings respectively. Both carry ROHS3 compliance and active production status. These parts address applications requiring elevated voltage protection thresholds.

All substitute parts maintain general-purpose overvoltage protection application classification and through-hole mounting compatibility. Operating temperature range reduction from -65°C to -55°C minimum (versus ICT-15) applies to all substitutes and requires verification for low-temperature operating environments.

Frequently Asked Questions (FAQ)

Q: Can the LCE15A directly replace the ICT-15 without circuit modification?

A: The LCE15A matches the ICT-15 electrical specifications (15V standoff, 61A peak pulse current, 1500W power) and maintains unidirectional Zener topology. However, the package change from DO-13 to DO-201 requires PCB footprint modification. Circuit-level performance remains equivalent when proper board layout accommodates the different package geometry.

Q: What is the significance of the clamping voltage difference between ICT-15 (20.6V) and substitute parts?

A: Clamping voltage determines the maximum voltage transient suppression level. The ICT-15 clamps at 20.6V, while substitutes range from 24.4V to 29.2V. Higher clamping voltages provide less aggressive transient suppression. Circuit design must confirm that the substitute's clamping voltage remains within acceptable system overvoltage limits.

Q: Why do substitute parts show -55°C minimum operating temperature versus ICT-15's -65°C?

A: Operating temperature range is a specified parameter provided by each manufacturer. The ICT-15 supports -65°C minimum operation, while all substitute parts specify -55°C minimum. Applications requiring operation below -55°C must retain the ICT-15 or identify alternative parts with extended low-temperature ratings.

Q: Are all substitute parts RoHS compliant?

A: The ICT-15 is RoHS non-compliant. All identified substitute parts (1.5KE18A, 1.5KE20A, LCE15A, LCE16A, LCE18A) carry ROHS3 compliance certification. Design requirements for RoHS-compliant assemblies necessitate substitute part selection.

Q: How does peak pulse current variation affect substitution suitability?

A: Peak pulse current capacity ranges from 51A (LCE18A) to 61A (LCE15A) across substitutes, compared to 60A for the ICT-15. Circuit transient energy levels determine required peak pulse current. Applications with transient energy below 51A can accommodate any substitute; higher energy transients require parts rated at 56A or greater.

Q: What packaging considerations apply when switching from DO-13 to DO-201?

A: DO-13 and DO-201 are both through-hole axial packages with different physical dimensions. DO-201 components are larger and require modified PCB pad spacing and hole diameter. Board layout redesign is necessary; electrical circuit function remains unchanged when proper mechanical accommodation is provided.

Q: Can substitute parts be used interchangeably in existing assemblies designed for ICT-15?

A: Direct mechanical interchangeability does not exist due to package differences. Electrical substitution is valid when circuit design accommodates the substitute's clamping voltage and peak pulse current specifications. PCB redesign is required for package conversion from DO-13 to DO-201.

Q: What inventory considerations support substitute part selection?

A: The ICT-15 maintains 931 pcs inventory. Substitute availability ranges from 953 pcs (LCE18A) to 30400 pcs (1.5KE20A). High-volume procurement or extended lead-time applications benefit from substitutes with greater inventory depth, particularly the 1.5KE20A series.