KTK-1-1/2 Equivalent & Substitute Parts

Part Overview

The KTK-1-1/2 is a 1.5A 600VAC fast-blow cartridge fuse manufactured by Eaton - Bussmann Electrical Division. This fuse is designed for electrical and industrial applications requiring overcurrent protection in AC circuits. The part is currently active in production with 668 pieces in stock. Substitute parts are necessary when the original manufacturer's stock is unavailable, when alternative voltage ratings (DC capability) are required, or when different breaking capacity specifications are needed for specific circuit protection requirements.

Substiute Parts

KTK-1-1/2

Eaton - Bussmann Electrical DivisionIn Stock: 721KTK-1-1/2 Datasheet

Current PartRFQ

0KLK01.5T

Littelfuse Inc.In Stock: 9670KLK01.5T Datasheet

DirectRFQ

KLKR01.5T

Littelfuse Inc.In Stock: 776KLKR01.5T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KTK-1-1/2 is determined by the following critical parameters:

• Current Rating: Must be 1.5A
• Voltage Rating - AC: Must be 600 VAC minimum
• Fuse Type: Must be Cartridge
• Response Time: Must be Fast Blow
• Package / Case: Must be 5AG, 10mm x 38mm (Midget)
• Physical Dimensions: Must be 0.406" Dia x 1.500" L (10.30mm x 38.10mm)
• Mounting Type: Must require holder compatibility

The substitute parts listed below meet all critical parameters. Variations in DC voltage rating and breaking capacity are secondary parameters that do not prevent substitution but may affect suitability for specific circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts meet the core electrical and mechanical requirements for direct replacement of the KTK-1-1/2 in 600VAC applications.

0KLK01.5T (Littelfuse POWR-GARD® KLK): This substitute provides equivalent AC performance with additional 500VDC capability. It maintains the same 100kA breaking capacity at rated AC voltage and carries CSA, UL, CE, and QPL certifications. This part is suitable for applications requiring dual AC/DC voltage ratings.

KLKR01.5T (Littelfuse POWR-GARD® KLKR): This substitute is classified as Class CC and provides enhanced breaking capacity of 200kA at rated AC voltage. It includes CSA, UL, and CE certifications. The Class CC designation indicates current-limiting characteristics suitable for circuits requiring higher fault current protection. This part is appropriate for applications where enhanced breaking capacity is specified.

Both substitutes are ROHS3 compliant and maintain identical physical dimensions and mounting requirements. Selection between substitutes depends on whether DC voltage capability or enhanced breaking capacity is required for the specific circuit application.

Frequently Asked Questions (FAQ)

Q: Can the 0KLK01.5T or KLKR01.5T be used as direct replacements for the KTK-1-1/2 in existing 600VAC circuits?

A: Yes. Both substitute parts meet the critical parameters: 1.5A current rating, 600VAC voltage rating, fast-blow response time, 5AG cartridge package, and 10mm x 38mm physical dimensions. They are mechanically and electrically compatible with existing KTK-1-1/2 holders and circuits.

Q: What is the difference between the two substitute parts?

A: The 0KLK01.5T provides 500VDC capability in addition to 600VAC operation, making it suitable for mixed AC/DC applications. The KLKR01.5T is Class CC rated with 200kA breaking capacity (versus 100kA for the main part), providing enhanced fault current protection for circuits requiring higher interrupting ratings.

Q: Are there any compatibility issues with the package or holder?

A: No. All three parts use the 5AG cartridge package with identical 10mm x 38mm (Midget) dimensions. They are fully compatible with standard 5AG fuse holders.

Q: Which certifications apply to the substitute parts?

A: The 0KLK01.5T carries CE, CSA, QPL, and UL certifications. The KLKR01.5T carries CE, CSA, and UL certifications. Both meet or exceed the CSA and UL certifications of the original KTK-1-1/2.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both 0KLK01.5T and KLKR01.5T are ROHS3 compliant, matching the compliance status of the KTK-1-1/2.