BP/FNM-10 Equivalent & Substitute Parts Reference

Part Overview

The BP/FNM-10 is a 10A 250VAC slow blow fuse cartridge manufactured by Eaton - Bussmann Electrical Division. This component is designed for motor protection and transformer protection applications, requiring a dedicated fuse holder for installation. The part is discontinued at DiGi Electronics, making identification of functionally equivalent alternatives essential for ongoing maintenance and system design requirements.

Substiute Parts

BP/FNM-10

Eaton - Bussmann Electrical DivisionIn Stock: 921BP/FNM-10 Datasheet

Current PartRFQ

0FLM010.T

Littelfuse Inc.In Stock: 11040FLM010.T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BP/FNM-10 is determined by strict alignment of the following electrical and mechanical parameters:

• Current Rating: 10A (exact match required)
• Voltage Rating - AC: 250 VAC (exact match required)
• Response Time: Slow Blow (exact match required)
• Fuse Type: Cartridge (exact match required)
• Physical Dimensions: Compatible with 0.410" Dia x 1.500" L envelope or equivalent metric dimensions
• Approval Certifications: Must include UL and CSA certifications for regulatory compliance

The substitute part 0FLM010.T meets all mandatory electrical parameters and maintains physical compatibility within acceptable tolerance ranges. Additional DC voltage rating and higher breaking capacity represent enhanced capabilities that do not compromise substitution validity.

Parameter Comparison

Engineering Selection Recommendations

The 0FLM010.T from Littelfuse Inc. is a direct functional equivalent for the discontinued BP/FNM-10. Both components satisfy the mandatory electrical requirements: 10A current rating, 250 VAC voltage rating, and slow blow response time. Physical dimensions are within acceptable tolerance (0.406" vs 0.410" diameter; both 1.500" length), ensuring compatibility with standard fuse holders designed for this envelope class.

The 0FLM010.T maintains active product status with current manufacturing availability, eliminating supply chain risk associated with the discontinued BP/FNM-10. Both parts carry UL and CSA certifications, meeting regulatory compliance requirements for motor and transformer protection applications. The 0FLM010.T provides enhanced breaking capacity (10kA vs 200A) and optional DC voltage rating (125 VDC), representing superior performance characteristics without compromising AC circuit protection functionality.

Frequently Asked Questions (FAQ)

Q: Can the 0FLM010.T be used as a direct replacement for the BP/FNM-10?

A: Yes. Both components share identical current rating (10A), AC voltage rating (250 VAC), response time (slow blow), and fuse type (cartridge). Physical dimensions are compatible within standard tolerance ranges for cartridge fuse holders.

Q: What is the significance of the additional 125 VDC rating on the 0FLM010.T?

A: The 0FLM010.T is rated for both 250 VAC and 125 VDC operation. This dual-voltage capability expands application flexibility without affecting AC-only circuit performance. In AC-only applications, this additional rating does not impact functionality.

Q: Are there differences in physical dimensions between these parts?

A: Diameter differs slightly (0.410" vs 0.406"), but both maintain the same 1.500" length. These dimensions fall within the standard 5AG/10mm x 38mm cartridge fuse envelope class, ensuring compatibility with existing fuse holders.

Q: What certifications apply to both parts?

A: Both the BP/FNM-10 and 0FLM010.T carry UL and CSA certifications. The 0FLM010.T additionally includes PSE and QPL approvals, providing broader regulatory coverage.

Q: Why is the breaking capacity different between these parts?

A: Breaking capacity (200A vs 10kA) reflects different design specifications and manufacturing standards. The 0FLM010.T's higher breaking capacity provides enhanced fault protection capability without affecting normal circuit operation at rated current.

Q: Is the 0FLM010.T RoHS compliant?

A: Yes. The 0FLM010.T is ROHS3 compliant, meeting current environmental and material restriction standards. The original BP/FNM-10 is RoHS compliant, ensuring both parts meet environmental requirements.