MINISMD050-2 Equivalent & Substitute Parts

Part Overview

The MINISMD050-2 is a PTC resettable fuse manufactured by Littelfuse Inc., rated for 500 mA hold current in a surface mount 1812 (4532 Metric) package with concave configuration. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and procurement continuity. The part operates within the PolySwitch® product family and is designed for overcurrent protection applications requiring automatic reset functionality.

Substiute Parts

MINISMD050-2

Littelfuse Inc.In Stock: 2853MINISMD050-2 Datasheet

Current PartRFQ

MINISMDC050F-2

LittelfuseIn Stock: 805277MINISMDC050F-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MINISMDC050F-2 qualifies as a direct substitute for the MINISMD050-2 based on the following critical parameters:

• Current Rating Match: Both parts maintain a 500 mA hold current (Ih) specification, ensuring equivalent overcurrent protection threshold
• Package Compatibility: Identical 1812 (4532 Metric) concave surface mount package with matching physical dimensions (0.179" L x 0.128" W, 0.024" max thickness)
• Manufacturer Continuity: Both parts are manufactured by Littelfuse Inc. within the PolySwitch® family
• Moisture Sensitivity: Identical MSL rating of 2A (4 Weeks) ensures equivalent handling and storage requirements

The MINISMDC050F-2 is an active product with enhanced specifications including defined voltage rating (24V), trip current (1 A), and temperature operating range (-40°C ~ 85°C), providing superior design documentation and long-term availability compared to the obsolete MINISMD050-2.

Parameter Comparison

Engineering Selection Recommendations

The MINISMDC050F-2 is the appropriate substitute for the obsolete MINISMD050-2 based on the following factors:

• Product Status: The MINISMDC050F-2 maintains active product status with full manufacturer support, ensuring long-term availability and technical documentation access
• Compliance Enhancement: The substitute achieves ROHS3 compliance, addressing regulatory requirements that may apply to new designs or manufacturing revisions
• Certification Continuity: Both parts carry equivalent agency approvals (CSA, TUV, UL for the substitute), maintaining design validation requirements
• Electrical Equivalence: Matching 500 mA hold current and identical package geometry ensure direct PCB-level compatibility without layout modifications

Frequently Asked Questions (FAQ)

Q: Can MINISMDC050F-2 be used as a direct replacement for MINISMD050-2 on existing PCBs?

A: Yes. The MINISMDC050F-2 maintains identical package dimensions, pin spacing, and electrical hold current rating. No PCB layout modifications are required for substitution.

Q: What is the primary advantage of switching to MINISMDC050F-2?

A: The substitute is an active product with full manufacturer support and ROHS3 compliance, eliminating obsolescence risk and meeting current regulatory standards.

Q: Are there any electrical parameter differences that affect circuit operation?

A: The substitute provides additional specified parameters (24V voltage rating, 1 A trip current, -40°C ~ 85°C operating range) that were not documented for the original part. These specifications define the protective envelope and do not alter the 500 mA hold current function.

Q: Does packaging format differ between these parts?

A: The MINISMDC050F-2 is supplied in Tape & Reel (TR) format, whereas the original part packaging is not specified. Both use identical 1812 (4532 Metric) concave surface mount packages.

Q: Are moisture handling requirements the same?

A: Yes. Both parts carry MSL 2A (4 Weeks) rating, requiring identical storage and handling procedures prior to assembly.