KTQ-6 Equivalent & Substitute Parts Reference

Part Overview

The KTQ-6 is a 6A 600VAC ceramic cartridge fuse manufactured by Eaton - Bussmann Electrical Division. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support and procurement. Substitute parts must maintain electrical compatibility across current rating, voltage rating, breaking capacity, and physical form factor to ensure proper circuit protection without modification to existing holder assemblies.

Substiute Parts

KTQ-6

Eaton - Bussmann Electrical DivisionIn Stock: 842KTQ-6 Datasheet

Current PartRFQ

BBS-6

Eaton - Bussmann Electrical DivisionIn Stock: 867BBS-6 Datasheet

DirectRFQ

0KLQ006.T

Littelfuse Inc.In Stock: 1004660KLQ006.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Current Rating: 6 A (exact match required)
• Voltage Rating (AC): 600 V (exact match required)
• Breaking Capacity @ Rated Voltage: 10 kA (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Physical Dimensions: Compatible with existing holder assemblies

Two substitute parts meet these criteria with the following distinctions:

BBS-6 (Eaton - Bussmann): Direct manufacturer equivalent with identical electrical ratings and active product status. Dimensions (0.410" Dia x 1.380" L) are within tolerance of the original KTQ-6 for standard holder compatibility.

0KLQ006.T (Littelfuse POWR-GARD® KLQ): Functionally equivalent with identical electrical ratings and active product status. Classified as 5AG package type (10mm x 38mm Midget standard). Response time differs (Slow Blow vs. Fast Blow), requiring application-specific verification before substitution.

Parameter Comparison

Engineering Selection Recommendations

BBS-6 is the primary substitute for KTQ-6 applications. Both components are manufactured by Eaton - Bussmann, share identical electrical specifications (6A, 600VAC, 10kA breaking capacity, Fast Blow response), and maintain compatible physical dimensions for existing holder assemblies. BBS-6 holds active product status with RoHS compliance and multi-agency approval (CE, CSA, UL), ensuring long-term availability and regulatory alignment.

0KLQ006.T provides an alternative substitute with equivalent electrical ratings and active status. This Littelfuse component meets UL and CE approvals and offers extended operating temperature range (-55°C to 125°C). The primary consideration is response time classification: 0KLQ006.T operates as Slow Blow versus the Fast Blow characteristic of KTQ-6. Application-specific circuit protection requirements must be evaluated before selecting this substitute, as response time affects fault clearing behavior.

Physical dimensions across all three parts are within 0.004" diameter and 0.005" length tolerance, supporting compatibility with standard cartridge fuse holders designed for non-standard ceramic cartridge formats.

Frequently Asked Questions (FAQ)

Q: Can BBS-6 directly replace KTQ-6 without holder modification?

A: Yes. BBS-6 maintains electrical equivalence (6A, 600VAC, 10kA breaking capacity) and physical compatibility (0.410" Dia x 1.380" L versus 0.406" Dia x 1.378" L) with KTQ-6. Dimensional tolerance is within standard holder specifications for ceramic cartridge fuses.

Q: What is the significance of Fast Blow versus Slow Blow response time?

A: Response time determines fault clearing speed. Fast Blow fuses (KTQ-6, BBS-6) interrupt circuits rapidly upon overcurrent, protecting sensitive components. Slow Blow fuses (0KLQ006.T) tolerate brief current surges before clearing, suitable for inductive loads or equipment with startup transients. Application circuit characteristics must match the selected fuse response classification.

Q: Are all substitute parts RoHS compliant?

A: BBS-6 is RoHS Compliant. 0KLQ006.T is ROHS3 Compliant. KTQ-6 RoHS status is not specified in available documentation. For applications requiring RoHS compliance verification, BBS-6 and 0KLQ006.T both meet current standards.

Q: Which substitute offers the widest operating temperature range?

A: 0KLQ006.T specifies operating temperature range of -55°C to 125°C. Operating temperature is not specified for KTQ-6 or BBS-6. For applications requiring extended temperature performance, 0KLQ006.T provides documented thermal specifications.

Q: What approval agencies certify these fuse components?

A: KTQ-6 carries UL approval. BBS-6 holds CE, CSA, and UL approvals. 0KLQ006.T holds CE and UL approvals. All three components meet UL standards for North American electrical applications.