Equivalent & Substitute Parts Reference for KTQ-5

Part Overview

The KTQ-5 fuse (Eaton - Bussmann Electrical Division) is a 5A 600V AC/DC ceramic cartridge fuse, designed for use with a holder and housed in a non-standard package. It is now obsolete, necessitating the identification of an alternate part with matching electrical, mechanical, and certification parameters to satisfy continued design, maintenance, or replacement needs.

Substiute Parts

KTQ-5

Eaton - Bussmann Electrical DivisionIn Stock: 880KTQ-5 Datasheet

Current PartRFQ

BBS-5

Eaton - Bussmann Electrical DivisionIn Stock: 838BBS-5 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is strictly determined by identical electrical ratings (current, voltage), fuse type, response characteristics, mounting requirements, package type and dimensions, and certification. The provided alternate, BBS-5, matches these criteria in all respects per the documented parameters, supporting direct replacement where regulatory and physical compatibility is required.

Key parameters considered for substitution:

• Current Rating (Amps)
• Voltage Rating - AC
• Response Time
• Mounting Type
• Fuse Type
• Package / Case
• Physical Size / Dimension
• Breaking Capacity @ Rated Voltage
• Approval Agency

Parameter Comparison

Engineering Selection Recommendations

The KTQ-5 part is obsolete and is UL-approved. The BBS-5 is an active substitute with matching current, voltage, response time, mounting method, package form factor, and breaking capacity. BBS-5 holds certifications from CE, CSA, and UL. For applications requiring active inventory and broad regulatory compliance, BBS-5 is suitable for direct substitution based only on specified criteria.

Frequently Asked Questions (FAQ)

Q1: Which key parameters allow BBS-5 to substitute KTQ-5?
A1: Electrical ratings (5A, 600V), response time (Fast Blow), mounting type (Requires Holder), package (Cartridge, Non-Standard), physical size, breaking capacity, and UL approval.

Q2: Are the physical dimensions of BBS-5 compatible with KTQ-5?
A2: Yes. Both use non-standard cartridge formats with closely matching dimensions: KTQ-5 is 0.406" Dia x 1.378" L, BBS-5 is 0.410" Dia x 1.380" L.

Q3: Does BBS-5 meet the same safety certifications as KTQ-5?
A3: BBS-5 is certified by CE, CSA, and UL; KTQ-5 holds UL approval. Both comply with UL requirements.

Q4: Can BBS-5 be used in applications previously served by KTQ-5 without modifications?
A4: Based on the provided size, electrical ratings, and mounting requirements, BBS-5 is suitable for applications specified for KTQ-5 within the given parameters.

Q5: Why is a substitute required for KTQ-5?
A5: KTQ-5 is obsolete and no longer in production, making inventory and ongoing support only possible with alternate part selection.