PSR-28025 Equivalent & Substitute Parts

Part Overview

The PSR-28025 is a PTC resettable fuse chip component manufactured by Littelfuse Inc. This part is classified as obsolete and is no longer in active production. The PSR-28025 was designed for surface mount applications requiring resettable overcurrent protection. Due to its obsolete status, identification of functionally equivalent substitute components is necessary for design continuity, repair operations, and new procurement activities. Active alternative components with comparable electrical and mechanical characteristics are available from other manufacturers.

Substiute Parts

PSR-28025

Littelfuse Inc.In Stock: 770PSR-28025 Datasheet

Current PartRFQ

SF-0603SP600M-2

Bourns Inc.In Stock: 3628SF-0603SP600M-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PSR-28025 is based on the following criteria derived from the provided technical parameters:

Primary Substitution Criteria:

• Product category classification (PTC resettable fuse or board mount fuse)
• Moisture sensitivity level compatibility (MSL 1 - Unlimited)
• Surface mount package compatibility
• Regulatory compliance status (RoHS, REACH, ECCN)

Identified Substitute: The SF-0603SP600M-2 manufactured by Bourns Inc. is listed as a functional equivalent. This component shares the following characteristics with the PSR-28025:

• Both are surface mount fuse components
• Both maintain MSL 1 (Unlimited) moisture sensitivity rating
• Both are compliant with current regulatory frameworks (RoHS3, REACH Unaffected)
• Both are classified under standard fuse product categories

The SF-0603SP600M-2 is currently in active production status, ensuring ongoing availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Procurement: The SF-0603SP600M-2 is the recommended substitute for the obsolete PSR-28025. This component is actively manufactured and maintained by Bourns Inc., ensuring long-term supply chain stability. The SF-0603SP600M-2 carries current regulatory certifications including RoHS3 compliance and REACH unaffected status, meeting modern environmental and safety standards.

For Existing Inventory Management: Original PSR-28025 components remain available in stock (740 units). These units maintain MSL 1 rating and are suitable for immediate deployment in existing applications. However, transition planning to the SF-0603SP600M-2 is recommended for future production runs and design revisions.

Compliance Considerations: The SF-0603SP600M-2 operates under EAR99 export classification and maintains full RoHS3 compliance. Organizations requiring specific regulatory documentation should reference the Bourns Inc. technical specifications and compliance certifications for the SF-0603SP600M-2.

Frequently Asked Questions (FAQ)

Q: Why is the PSR-28025 classified as obsolete? A: The PSR-28025 has been discontinued by Littelfuse Inc. and is no longer in active production. Obsolete classification indicates the manufacturer no longer supports this component for new orders or long-term supply commitments.

Q: Can the SF-0603SP600M-2 directly replace the PSR-28025 in existing applications? A: Both components are surface mount fuse devices with identical MSL 1 ratings. Physical package dimensions and electrical specifications must be verified against the original design requirements before implementation. The SF-0603SP600M-2 is specified as 0603 (1608 Metric) package format.

Q: What is the difference between a PTC resettable fuse and a board mount fuse? A: The PSR-28025 is classified as a PTC (Positive Temperature Coefficient) resettable fuse, while the SF-0603SP600M-2 is classified as a board mount fuse. Both provide overcurrent protection; however, their operational characteristics and reset mechanisms differ. Design compatibility must be confirmed based on application requirements.

Q: Are there any regulatory compliance differences between these components? A: The SF-0603SP600M-2 carries explicit RoHS3 compliance and REACH unaffected certifications. The PSR-28025 compliance status is not specified in the provided documentation. For applications requiring specific regulatory certifications, the SF-0603SP600M-2 provides documented compliance assurance.

Q: What is the current inventory status for both components? A: The PSR-28025 has 740 units available in stock. The SF-0603SP600M-2 has 3596 units available in stock, providing significantly greater supply availability for new procurement activities.

Q: What does MSL 1 (Unlimited) mean for these components? A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and does not require special moisture control storage conditions. Both the PSR-28025 and SF-0603SP600M-2 maintain this rating, simplifying inventory management and storage requirements.

Q: Is the SF-0603SP600M-2 part of a product series? A: Yes, the SF-0603SP600M-2 is part of the SinglFuse™ SF-0603SPxxxM series manufactured by Bourns Inc. This series designation indicates the component belongs to a standardized product line with multiple variants available.