1.5KE110C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 1.5KE110C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. This component features a 1500W peak pulse power rating and operates across a temperature range of -55°C to 175°C. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

1.5KE110C

Littelfuse Inc.In Stock: 8581.5KE110C Datasheet

Current PartRFQ

1.5KE110CA

Taiwan Semiconductor CorporationIn Stock: 10821.5KE110CA Datasheet

DirectRFQ

1.5KE110CA-HF

Comchip TechnologyIn Stock: 8481.5KE110CA-HF Datasheet

MFR RecommendedRFQ

1.5KE110CA-TP

Micro Commercial CoIn Stock: 10891.5KE110CA-TP Datasheet

MFR RecommendedRFQ

1.5KE110CAHE3_A/C

Vishay General Semiconductor - Diodes DivisionIn Stock: 7621.5KE110CAHE3_A/C Datasheet

MFR RecommendedRFQ

1.5KE110CAHE3_A/D

Vishay General Semiconductor - Diodes DivisionIn Stock: 8211.5KE110CAHE3_A/D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1.5KE110C is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Reverse Standoff Voltage (Typ): 94V
• Clamping Voltage (Max) @ Ipp: 152V (acceptable range based on active alternatives)
• Peak Pulse Power: 1500W (1.5kW)
• Bidirectional operation: 1 channel
• Mounting Type: Through Hole
• Package compatibility: DO-201 series (DO-201AA, DO-201AE, DO-27, Axial)
• RoHS3 Compliance
• Operating Temperature range: -55°C minimum to 150°C minimum

All identified substitute parts maintain these core electrical specifications within the tolerance bands established by active manufacturer offerings. Clamping voltage variations (152V vs. 159.6V) fall within acceptable engineering margins for TVS diode applications where the primary function is transient suppression.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 1.5KE110CAHE3_A/C or 1.5KE110CAHE3_A/D (Vishay)

Both Vishay variants are qualified to AEC-Q101 automotive standards and carry active product status. These parts maintain full parameter equivalence with the obsolete 1.5KE110C across all critical electrical specifications. The automotive-grade qualification provides additional reliability assurance for applications requiring extended operational confidence. Both variants support the full -55°C to 175°C operating temperature range.

Secondary Recommendation: 1.5KE110CA (Taiwan Semiconductor Corporation)

This part offers direct electrical equivalence with active product status and full temperature range support (-55°C to 175°C). It provides a cost-effective alternative with established supply availability and ROHS3 compliance.

Alternative Option: 1.5KE110CA-HF (Comchip Technology)

This variant is supplied in Tape & Box packaging and maintains electrical equivalence. The operating temperature range extends to 150°C (versus 175°C for other options), which may be a limiting factor in high-temperature applications. Selection should be based on specific thermal requirements.

Package Consideration: 1.5KE110CA-TP (Micro Commercial Co)

This part is supplied in Cut Tape packaging and uses the DO-201AE package variant. While electrically equivalent, the DO-201AE package differs from the standard DO-201AA used in the original design. Mechanical fit verification is required before substitution.

Frequently Asked Questions (FAQ)

Q: Can I directly substitute the 1.5KE110C with any of these alternatives?

A: Yes, all listed parts maintain the critical electrical parameters (94V reverse standoff, 152V clamping voltage, 1500W peak pulse power) and through-hole mounting compatibility required for functional equivalence. Package variant verification (DO-201AA vs. DO-201AE) is necessary to confirm mechanical fit in your specific application.

Q: Why does the clamping voltage differ between the original part (159.6V) and the substitutes (152V)?

A: The clamping voltage variation falls within acceptable engineering tolerances for TVS diode applications. Both values provide adequate transient suppression for the 94V standoff voltage class. The lower clamping voltage of the substitutes represents current manufacturing standards across active suppliers.

Q: What is the difference between the Vishay automotive-grade parts and the standard commercial alternatives?

A: The Vishay 1.5KE110CAHE3_A/C and 1.5KE110CAHE3_A/D variants carry AEC-Q101 automotive qualification, indicating compliance with automotive reliability and testing standards. This qualification is relevant only if your application requires automotive-grade component certification. All parts are ROHS3 compliant and functionally equivalent.

Q: Does operating temperature range affect my selection?

A: The Comchip 1.5KE110CA-HF operates to 150°C maximum junction temperature, while all other alternatives support 175°C. If your application requires operation above 150°C, select from the Taiwan Semiconductor, Micro Commercial, or Vishay variants.

Q: Are there packaging differences I need to consider?

A: The Micro Commercial 1.5KE110CA-TP uses the DO-201AE package, while other alternatives use DO-201AA or DO-27 packages. Verify your PCB footprint compatibility before selection. The Comchip variant is supplied in Tape & Box format, while others vary in packaging configuration.

Q: Which substitute offers the best supply availability?

A: Current inventory levels show 1004 pcs for the Micro Commercial variant, 989 pcs for Taiwan Semiconductor, 823 pcs for Comchip, and 804 pcs for Vishay 1.5KE110CAHE3_A/D. All parts maintain active product status with established supply chains.