USM3I Equivalent & Substitute Parts

Part Overview

The USM3I is a 600V 30A 3-pole mid-size fuse holder with indicator manufactured by Mersen USA Newburyport-MA L.L.C. This component is classified as active product status and is ROHS3 compliant. Finding equivalent substitute parts is necessary to ensure supply chain continuity, optimize procurement options, and maintain system compatibility across different sourcing channels while meeting identical electrical and mechanical specifications.

Substiute Parts

USM3I

Mersen USA Newburyport-MA L.L.C.In Stock: 882USM3I Datasheet

Current PartRFQ

LPSM0003ZXID

Littelfuse Inc.In Stock: 852LPSM0003ZXID Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the USM3I are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

• Voltage rating: 600V
• Current rating: 30A
• Circuit configuration: 3-pole/3-circuit
• Fuse holder type: Cartridge
• Mounting compatibility: Mid-size fuse format
• Compliance: ROHS3 Compliant

The LPSM0003ZXID from Littelfuse Inc. meets all these parameters as a 600V 30A 3-circuit cartridge fuse holder, making it a direct functional equivalent for the USM3I.

Parameter Comparison

Engineering Selection Recommendations

Both the USM3I and LPSM0003ZXID are active products with ROHS3 compliance certification. Selection between these parts should be based on:

• Availability: Both parts maintain adequate inventory levels (819 and 837 units respectively)
• Compliance requirements: Both satisfy ROHS3 regulatory requirements
• Mounting infrastructure: The LPSM0003ZXID is specified for DIN Rail mounting with screw terminal and pressure plate termination
• Supply chain strategy: Either part may be selected based on procurement lead times and supplier relationships

Frequently Asked Questions (FAQ)

Q: Can the LPSM0003ZXID directly replace the USM3I in all applications?

A: Both parts share identical electrical specifications (600V, 30A, 3-circuit). Compatibility depends on mechanical mounting requirements and termination style compatibility in your specific installation. Verify that DIN Rail mounting and screw terminal/pressure plate termination are compatible with your system design.

Q: What fuse types are compatible with these holders?

A: The LPSM0003ZXID is specified for use with 5AG cartridge fuses in 13/32" x 1-1/2" (10mm x 38mm) format. Confirm fuse compatibility with your application requirements.

Q: Are both parts suitable for industrial control applications?

A: Both the USM3I and LPSM0003ZXID are rated for 600V 30A operation and carry ROHS3 compliance, making them suitable for industrial electrical distribution and control applications within these electrical parameters.

Q: What is the difference in moisture sensitivity between these parts?

A: The USM3I has moisture sensitivity level listed as Not Applicable. The LPSM0003ZXID has MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: How do I verify part compatibility before ordering?

A: Confirm that voltage (600V), current (30A), circuit count (3), and mounting method (DIN Rail for LPSM0003ZXID) match your system specifications. Cross-reference termination style and fuse cartridge dimensions with your installation requirements.