Equivalent & Substitute Parts for KTK-R-1/10

Part Overview

The KTK-R-1/10 is a 100mA, 600VAC fast-blow cartridge fuse manufactured by Eaton - Bussmann Electrical Division as part of the Limitron™ KTK-R series. This component is classified as a CC-class fuse in 5AG midget package format (10mm x 38mm) and is designed for electrical and industrial applications requiring fast-response overcurrent protection. The part is currently active in production with 857 units in stock. Alternative equivalent parts may be required due to supply chain considerations, regional availability, or specific application requirements for dual-voltage (AC/DC) rated protection.

Substiute Parts

KTK-R-1/10

Eaton - Bussmann Electrical DivisionIn Stock: 946KTK-R-1/10 Datasheet

Current PartRFQ

KLKR.100T

Littelfuse Inc.In Stock: 1052KLKR.100T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KTK-R-1/10 is determined by strict equivalence across the following critical parameters:

• Current Rating: Must be 100mA
• AC Voltage Rating: Must be 600 VAC minimum
• Fuse Class: Must be CC-class
• Package Format: Must be 5AG, 10mm x 38mm (Midget)
• Response Time: Must be Fast Blow
• Breaking Capacity: Must be 200kA at rated voltage
• Mounting Type: Must require holder (cartridge format)
• Regulatory Compliance: Must maintain CE, CSA, and UL certifications

The KLKR.100T from Littelfuse Inc. meets all mandatory substitution criteria. This part provides identical AC voltage protection at 600 VAC with additional DC voltage capability (300 VDC) and maintains full compliance with all required certifications and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the KTK-R-1/10 and KLKR.100T are active production components with full regulatory compliance (CE, CSA, UL certifications) and ROHS3 compliance. Selection between these parts should be based on application requirements and supply availability:

• KTK-R-1/10: Select when AC-only protection at 600 VAC is required and Eaton component standardization is preferred.
• KLKR.100T: Select when dual-voltage capability (600 VAC / 300 VDC) is beneficial or when Littelfuse supply chain availability is advantageous. The additional DC rating does not compromise AC performance and provides expanded application flexibility.

Both parts maintain identical mechanical compatibility, electrical performance at 600 VAC, and regulatory standing. The choice between them is driven by supply chain logistics and whether DC voltage protection capability is operationally beneficial.

Frequently Asked Questions (FAQ)

Q: Can KLKR.100T be used as a direct replacement for KTK-R-1/10?

A: Yes. Both parts are CC-class, 100mA, 600 VAC fast-blow cartridge fuses in identical 5AG midget package format (10mm x 38mm). All mechanical, electrical, and regulatory specifications align for direct substitution in 600 VAC AC applications.

Q: What is the significance of the 300 VDC rating on the KLKR.100T?

A: The KLKR.100T includes a 300 VDC voltage rating in addition to its 600 VAC rating. This does not affect AC performance but extends the part's usability to DC circuits. The KTK-R-1/10 specification does not include a DC rating. In AC-only applications, this difference is not operationally relevant.

Q: Are the physical dimensions identical?

A: Yes. Both parts are 0.406" diameter x 1.500" length (10.30mm x 38.10mm) in the 5AG midget cartridge format. They are mechanically interchangeable in any holder designed for this package size.

Q: Do both parts require a fuse holder?

A: Yes. Both the KTK-R-1/10 and KLKR.100T are cartridge fuses that require a compatible holder for installation. They are not plug-in fuses.

Q: Are there any compliance differences between these parts?

A: No. Both parts carry identical regulatory approvals (CE, CSA, UL) and are ROHS3 compliant. There are no compliance barriers to substitution.

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

A: Both parts have 200kA breaking capacity at their rated AC voltage (600 VAC). The KLKR.100T additionally specifies 20kA breaking capacity at its DC rating (300 VDC). This does not affect AC circuit performance.