KLM-3/4 Equivalent & Substitute Parts

Part Overview

The KLM-3/4 is a 750mA fast-blow fuse cartridge rated for 600 VAC/VDC operation, manufactured by Eaton - Bussmann Electrical Division. This component is designed for use in electrical and industrial applications requiring reliable overcurrent protection in holder-based installations. The part maintains Active product status with 1006 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-3/4

Eaton - Bussmann Electrical DivisionIn Stock: 1090KLM-3/4 Datasheet

Current PartRFQ

KLKD.750T

LittelfuseIn Stock: 971KLKD.750T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KLM-3/4 is determined by strict equivalence across the following parameters:

• Current Rating: 750mA (exact match required)
• Voltage Rating: 600 VAC and 600 VDC (both must be met)
• Fuse Type: Cartridge with fast-blow response
• Physical Dimensions: 0.406" Dia x 1.500" L (10.30mm x 38.10mm)
• Package Classification: 5AG, 10mm x 38mm midget cartridge
• Mounting Configuration: Holder-based installation
• Approval Certifications: CE, CSA, UL compliance required

The KLKD.750T from Littelfuse meets all substitution criteria, maintaining identical electrical ratings, mechanical compatibility, and regulatory approvals.

Parameter Comparison

Engineering Selection Recommendations

Both the KLM-3/4 and KLKD.750T cartridge fuses are Active products with full regulatory compliance across CE, CSA, and UL certifications. Selection between these components should be based on:

• Availability and lead time requirements (KLM-3/4: 1006 units; KLKD.750T: 934 units in stock)
• Packaging format preference (KLM-3/4: Bulk; KLKD.750T: Box)
• RoHS compliance level (both compliant; KLKD.750T carries ROHS3 designation)
• Existing supply chain and procurement procedures

The electrical and mechanical specifications are equivalent, ensuring direct interchangeability in 750mA, 600 VAC/VDC holder-based fuse applications.

Frequently Asked Questions (FAQ)

Q: Can the KLKD.750T replace the KLM-3/4 in existing installations?

A: Yes. Both fuses share identical current ratings (750mA), voltage ratings (600 VAC/VDC), response characteristics (fast-blow), physical dimensions (0.406" Dia x 1.500" L), and regulatory approvals (CE, CSA, UL). Direct substitution is electrically and mechanically compatible.

Q: What determines if a fuse cartridge is a valid substitute?

A: Valid substitution requires exact equivalence in current rating, AC and DC voltage ratings, fuse type (cartridge), response time (fast-blow), physical dimensions, package classification (5AG midget), and approval certifications. Deviations in any of these parameters disqualify a part from substitution.

Q: Are there differences in packaging between these two fuses?

A: Yes. The KLM-3/4 is supplied in Bulk packaging, while the KLKD.750T is supplied in Box packaging. This affects order quantities and storage but does not impact electrical or mechanical compatibility.

Q: Do both fuses meet current RoHS requirements?

A: Yes. The KLM-3/4 is RoHS Compliant, and the KLKD.750T is ROHS3 Compliant. Both meet applicable environmental and material restriction standards.

Q: What is the breaking capacity of these fuses?

A: Both the KLM-3/4 and KLKD.750T have a breaking capacity of 100kA AC and 50kA DC at their rated voltage, ensuring consistent overcurrent protection performance.