KLM-1/8 Equivalent & Substitute Parts

Part Overview

The KLM-1/8 is a 125mA fast-blow fuse cartridge manufactured by Eaton - Bussmann Electrical Division, rated for 600 VAC and 600 VDC operation. This component is designed for use in electrical and industrial applications where overcurrent protection is required in holder-based installations. The part maintains active product status with 1021 units in current inventory. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in existing installations.

Substiute Parts

KLM-1/8

Eaton - Bussmann Electrical DivisionIn Stock: 1103KLM-1/8 Datasheet

Current PartRFQ

KLKD.125T

Littelfuse Inc.In Stock: 1119KLKD.125T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KLM-1/8 is determined by strict alignment of the following electrical and mechanical parameters:

• Current Rating: 125mA (exact match required)
• Voltage Rating: 600 VAC and 600 VDC (both required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity: 100kA AC and 50kA DC (exact match required)
• Physical Dimensions: 0.406" Dia x 1.500" L (exact match required for holder compatibility)
• Fuse Type: Cartridge with holder requirement (exact match required)
• Approval Certifications: CE, CSA, UL (all three required)

The KLKD.125T meets all substitution criteria and is classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

The KLKD.125T is a direct substitute for the KLM-1/8 based on identical electrical ratings, mechanical dimensions, response characteristics, and approval certifications. Both components maintain active product status and comply with CE, CSA, and UL standards. The KLKD.125T carries ROHS3 compliance, which exceeds the RoHS compliance level of the original part. Selection between these components may be based on availability, packaging format (Bulk versus Box), or supply chain requirements, as all technical parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can the KLKD.125T be used as a direct replacement for the KLM-1/8?

A: Yes. The KLKD.125T meets all electrical and mechanical substitution criteria, including current rating, voltage ratings, breaking capacity, physical dimensions, response time, and approval certifications.

Q: Are the physical dimensions identical between these parts?

A: The dimensions are functionally equivalent. Both parts measure 0.406" Dia x 1.500" L. The KLM-1/8 specifies 10.30mm diameter while the KLKD.125T specifies 10.31mm diameter; this 0.01mm difference is within manufacturing tolerance and does not affect holder compatibility.

Q: What is the significance of the different RoHS compliance levels?

A: The KLKD.125T carries ROHS3 compliance, which represents a more recent regulatory standard than the RoHS compliance of the KLM-1/8. ROHS3 compliance is backward compatible and does not restrict substitution.

Q: Do both parts require the same holder?

A: Yes. Both components are cartridge fuses in the 5AG, 10mm x 38mm (Midget) package format and require a compatible fuse holder for installation.

Q: Are the approval certifications equivalent?

A: Yes. Both parts carry identical approval certifications: CE, CSA, and UL. All three certifications are present on both components.