KTU-1400 Equivalent & Substitute Parts

Part Overview

The KTU-1400 is a 1.4kA 600 VAC fast-blow fuse cartridge manufactured by Eaton - Bussmann Electrical Division, part of the Limitron™ KTU series. This component is designed for bolt-mount applications in electrical and industrial systems requiring high breaking capacity (200kA at rated voltage) and fast response characteristics. The part maintains active product status with 776 units in current inventory.

Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and regulatory approvals align with the original specification, enabling direct replacement in applications where the primary part is unavailable or supply constraints exist.

Substiute Parts

KTU-1400

Eaton - Bussmann Electrical DivisionIn Stock: 799KTU-1400 Datasheet

Current PartRFQ

KLPC1400X

Littelfuse Inc.In Stock: 988KLPC1400X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KTU-1400 is determined by the following critical parameters:

• Current Rating: Must match 1.4kA exactly
• AC Voltage Rating: Must meet or exceed 600 VAC
• Fuse Type & Class: Must be cartridge type, Class L
• Mounting Configuration: Must support bolt-mount with cylindrical blade terminal design
• Physical Dimensions: Must be compatible with 3.000" diameter and approximately 3.750" length envelope
• Regulatory Approvals: Must maintain CE, CSA, and UL certifications
• RoHS Compliance: Must satisfy RoHS requirements

The KLPC1400X from Littelfuse Inc. qualifies as a substitute based on matching current rating, AC voltage rating, fuse class, mounting type, physical envelope, and regulatory certifications. Secondary differences in response time (slow blow vs. fast blow) and DC voltage capability represent extended functionality rather than substitution barriers for AC-primary applications.

Parameter Comparison

Engineering Selection Recommendations

Both the KTU-1400 and KLPC1400X maintain active product status and carry identical regulatory certifications (CE, CSA, UL), ensuring compliance with applicable standards. The KTU-1400 is the primary specification; however, the KLPC1400X provides a functionally equivalent alternative for AC applications at 600 VAC and 1.4kA.

Selection between these parts should be based on application-specific requirements:

• Fast-blow response requirement: KTU-1400 is specified for applications requiring rapid fault isolation
• Slow-blow tolerance: KLPC1400X accommodates applications with transient inrush currents or where delayed response is acceptable
• DC voltage presence: KLPC1400X provides dual-voltage capability (600 VAC / 480 VDC) for mixed-voltage systems
• Supply availability: Either part may be selected based on inventory status and lead time

Both parts satisfy RoHS compliance requirements and maintain identical mechanical compatibility with bolt-mount installations.

Frequently Asked Questions (FAQ)

Q: Can KLPC1400X replace KTU-1400 in all applications?

A: The KLPC1400X is mechanically and electrically compatible for AC applications at 600 VAC and 1.4kA. The primary difference is response time: KTU-1400 is fast-blow, while KLPC1400X is slow-blow. Verify that the application tolerates slow-blow response characteristics before substitution.

Q: What is the significance of the 0.002" length difference between parts?

A: The dimensional variance (3.750" vs. 3.752") is within typical manufacturing tolerance and does not affect mechanical fit in standard bolt-mount fuse holders designed for cylindrical cartridge fuses of this class and diameter.

Q: Are both parts RoHS compliant?

A: Yes. KTU-1400 is RoHS Compliant, and KLPC1400X is ROHS3 Compliant. Both satisfy RoHS requirements for new installations.

Q: Does KLPC1400X DC voltage rating affect AC-only applications?

A: No. The 480 VDC rating on KLPC1400X represents extended capability and does not impact performance in AC-only circuits. The 600 VAC rating remains the controlling specification for AC applications.

Q: What certifications apply to both parts?

A: Both KTU-1400 and KLPC1400X carry CE, CSA, and UL approvals, ensuring compliance with North American and European regulatory frameworks.

Q: Can these parts be used interchangeably in existing installations?

A: Yes, provided the application does not require fast-blow response as a critical design parameter. Verify circuit protection coordination and equipment manufacturer guidance before substitution.