AMI-50 Equivalent & Substitute Parts

Part Overview

The AMI-50 is a 50 A automotive fuse rated for 32 V DC operation with bolt mount configuration and Auto Link package type. Manufactured by Eaton - Bussmann Electrical Division, this component is classified as Active product status. Substitute parts become necessary when the primary manufacturer experiences supply constraints, extended lead times, or when design flexibility permits equivalent alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

AMI-50

Eaton - Bussmann Electrical DivisionIn Stock: 1248AMI-50 Datasheet

Current PartRFQ

153.5631.5502

Littelfuse Inc.In Stock: 18425153.5631.5502 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AMI-50 is determined by strict equivalence across the following parameters:

• Current Rating: 50 A (exact match required)
• Voltage Rating - DC: 32 V (exact match required)
• Fuse Type: Automotive (exact match required)
• Mounting Type: Bolt Mount (exact match required)
• Package / Case: Auto Link (exact match required)
• Breaking Capacity @ Rated Voltage: 2 kA (exact match required)

The substitute part 154.6631.5502 manufactured by Littelfuse Inc. meets all mandatory electrical parameters. Physical dimension variance in height (0.323" vs. 0.236") must be evaluated for mechanical fit within the specific application assembly.

Parameter Comparison

Engineering Selection Recommendations

Both the AMI-50 and 154.6631.5502 maintain Active product status with established supply availability. The Littelfuse substitute carries UL approval certification, providing additional regulatory documentation for applications requiring third-party validation. Both components are RoHS compliant and REACH unaffected, meeting environmental compliance requirements.

The primary engineering consideration is mechanical fit. The Littelfuse part exhibits a height increase of 0.087" (2.20mm), which must be confirmed compatible with the bolt mount assembly cavity and surrounding component clearances. Electrical performance remains equivalent across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the 154.6631.5502 be used as a direct replacement for the AMI-50?

A: Electrical substitution is valid based on identical current rating, voltage rating, fuse type, mounting type, package type, and breaking capacity. Mechanical fit must be confirmed due to height dimension variance.

Q: What is the significance of the "Slow Blow" response time specification on the Littelfuse part?

A: Response time characterizes fuse melting behavior under overcurrent conditions. The AMI-50 does not specify response time in the provided data. If the application requires specific response time characteristics, this parameter must be evaluated against circuit protection requirements.

Q: Are there compliance differences between the two parts?

A: Both parts are RoHS compliant and REACH unaffected. The Littelfuse substitute carries UL approval, while the Eaton part does not specify an approval agency. For applications requiring third-party certification, the Littelfuse part provides documented UL validation.

Q: What is the impact of the physical dimension difference?

A: The Littelfuse part is 0.087" (2.20mm) taller. This difference may affect fit within bolt mount assemblies with limited vertical clearance. Physical verification against the specific application assembly is required before substitution.

Q: Are both parts available in equivalent quantities?

A: The AMI-50 has 1145 pieces in stock. The Littelfuse substitute 154.6631.5502 has 18400 pieces in stock, providing greater availability for high-volume requirements.