KTK-8 Equivalent & Substitute Parts

Part Overview

The KTK-8 is an 8A 600VAC fast-blow fuse cartridge manufactured by Eaton - Bussmann Electrical Division. This component is designed for electrical and industrial applications requiring cartridge-style fuse protection in holder-based installations. The part maintains active product status with 704 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when system requirements permit equivalent functionality.

Substiute Parts

KTK-8

Eaton - Bussmann Electrical DivisionIn Stock: 784KTK-8 Datasheet

Current PartRFQ

KLKR008.T

Littelfuse Inc.In Stock: 818KLKR008.T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KTK-8 is determined by the following critical parameters:

• Current Rating: Must be 8A
• AC Voltage Rating: Must be 600 VAC minimum
• Fuse Type: Must be cartridge style
• 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)
• Response Time: Must be fast-blow characteristic
• Mounting Type: Must require holder installation

The substitute part KLKR008.T meets all critical substitution criteria. It maintains identical current rating, AC voltage rating, fuse type, package designation, and physical dimensions. Both parts are fast-blow cartridge fuses in the 5AG midget format, ensuring mechanical and electrical compatibility in holder-based installations.

Parameter Comparison

Engineering Selection Recommendations

Both the KTK-8 and KLKR008.T are active products with current manufacturing status and full regulatory compliance. The KTK-8 carries CSA and UL approvals, while the KLKR008.T carries CE, CSA, and UL approvals. Both components are ROHS3 compliant and REACH unaffected.

The KLKR008.T provides additional DC voltage capability (300 VDC) and higher breaking capacity (200kA AC versus 100kA), which may be advantageous in applications requiring dual-voltage operation or enhanced fault protection. However, for applications requiring only 600 VAC operation at 8A with fast-blow response, either component provides equivalent functionality within the specified electrical and mechanical parameters.

Selection between these parts should be based on application-specific voltage requirements, available inventory, and system design specifications.

Frequently Asked Questions (FAQ)

Q: Can KLKR008.T replace KTK-8 in all applications?

A: Yes, for applications operating at 600 VAC with 8A current requirements. Both parts are identical in current rating, voltage rating, fuse type, package designation, and physical dimensions. The KLKR008.T offers additional DC voltage capability and higher breaking capacity, which do not prevent substitution in AC-only applications.

Q: Are the physical dimensions identical between KTK-8 and KLKR008.T?

A: Yes. Both parts are 5AG midget cartridge fuses with dimensions of 0.406" Dia x 1.500" L (10.30mm x 38.10mm). They are mechanically interchangeable in standard 5AG fuse holders.

Q: What is the difference in breaking capacity between these parts?

A: The KTK-8 has a breaking capacity of 100kA at rated voltage. The KLKR008.T has a breaking capacity of 200kA AC and 20kA DC. Both exceed standard requirements for 8A 600VAC circuits.

Q: Do both parts require a fuse holder?

A: Yes. Both the KTK-8 and KLKR008.T are cartridge fuses that require a compatible 5AG fuse holder for installation.

Q: Are there regulatory compliance differences?

A: The KTK-8 carries CSA and UL approvals. The KLKR008.T carries CE, CSA, and UL approvals. Both are ROHS3 compliant and REACH unaffected. The additional CE marking on KLKR008.T indicates compliance with European regulatory requirements.