Littelfuse 047601.6MRSN Surface Mount Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 047601.6MRSN is a 1.6 A, 250 V AC / 125 V DC surface mount board mount fuse in the NANO²®476 series. This fast-blow fuse is designed for circuit protection in applications requiring compact, high-reliability protection with cURus approval. The part is currently active in production with 933 pieces in stock. Substitute parts may be required due to inventory availability, lead time considerations, or specific packaging preferences while maintaining identical electrical and mechanical performance.

Substiute Parts

047601.6MRSN

Littelfuse Inc.In Stock: 1009047601.6MRSN Datasheet

Current PartRFQ

047601.6MR

Littelfuse Inc.In Stock: 1696047601.6MR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 047601.6MR qualifies as a parametric equivalent to the 047601.6MRSN based on strict alignment of the following critical parameters:

Current Rating: Both parts are rated at 1.6 A, ensuring identical overcurrent protection thresholds.

Voltage Ratings: Both maintain 250 V AC and 125 V DC ratings, allowing direct substitution in circuits with these voltage specifications.

Response Time: Both employ fast-blow characteristics, providing identical protection response profiles.

Mounting and Package: Both are surface mount components in 2-SMD, Square End Block configuration with identical physical dimensions (0.240" L x 0.106" W x 0.106" H).

Electrical Performance: Both share identical breaking capacity (100A AC, 300A DC), melting I²t (0.62), and DC cold resistance (0.0825 Ohms).

Compliance and Certifications: Both are cURus approved, ROHS3 compliant, and operate across the same temperature range (-55°C ~ 125°C).

Series Designation: Both belong to the NANO²®476 series, confirming design family compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the 047601.6MRSN and 047601.6MR are active production parts with full cURus approval and ROHS3 compliance. Selection between these parts should be based on inventory availability and lead time requirements. The 047601.6MR currently maintains higher inventory levels (1653 pieces versus 933 pieces), which may provide supply chain advantages. Both parts are functionally and mechanically identical, with no electrical performance differentiation. Either part is suitable for direct substitution in circuit protection applications requiring 1.6 A fast-blow protection at 250 V AC / 125 V DC with surface mount 2-SMD packaging.

Frequently Asked Questions (FAQ)

Q: Can the 047601.6MR be used as a direct replacement for the 047601.6MRSN?

A: Yes. Both parts share identical electrical ratings (1.6 A, 250 V AC, 125 V DC), response characteristics (fast-blow), physical dimensions (0.240" L x 0.106" W x 0.106" H), and regulatory approvals (cURus, ROHS3). Direct substitution is supported without circuit redesign.

Q: Are there any differences in breaking capacity or protection characteristics?

A: No. Both parts provide identical breaking capacity (100A AC, 300A DC), melting I²t (0.62), and DC cold resistance (0.0825 Ohms). Protection performance is equivalent.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both are cURus approved, ROHS3 compliant, REACH unaffected, and operate across the identical temperature range (-55°C ~ 125°C). Compliance profiles are identical.

Q: What is the difference between the part numbers 047601.6MRSN and 047601.6MR?

A: The part numbers differ only in suffix designation. Both belong to the NANO²®476 series and are functionally equivalent. The suffix variation does not indicate electrical or mechanical differences.

Q: Are both parts available in the same packaging format?

A: Yes. Both are supplied in Tape & Reel (TR) packaging suitable for automated assembly processes. Physical package dimensions and SMD configuration are identical.

Q: Which part should be selected based on current inventory?

A: The 047601.6MR currently has higher inventory availability (1653 pieces) compared to the 047601.6MRSN (933 pieces). Selection may be driven by supply chain lead time and procurement requirements.