PSR-28026 Equivalent & Substitute Parts

Part Overview

The PSR-28026 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-28026 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 production implementations where legacy specifications must be maintained or adapted to currently available alternatives.

Substiute Parts

PSR-28026

Littelfuse Inc.In Stock: 1037PSR-28026 Datasheet

Current PartRFQ

SF-0603SP700M-2

Bourns Inc.In Stock: 5144SF-0603SP700M-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PSR-28026 is based on the following criteria derived from the provided technical parameters:

Primary Substitution Logic: The SF-0603SP700M-2 manufactured by Bourns Inc. is identified as a functional substitute. This substitution is established on the basis of:

1. Component Category Alignment – Both components function as overcurrent protection devices in surface mount configurations
2. Moisture Sensitivity Compatibility – Both parts share MSL 1 (Unlimited) rating, indicating identical moisture handling requirements
3. Compliance Status – The substitute part maintains active product status with current manufacturing support and RoHS3 compliance certification
4. Surface Mount Technology – Both components are designed for surface mount board integration

Key Parameters Determining Substitution Eligibility:

• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Component Type: Resettable fuse / Board mount fuse
• Mounting Technology: Surface mount
• Regulatory Compliance: RoHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Part Replacement:

The SF-0603SP700M-2 is the identified substitute for the PSR-28026. Selection of this alternative component is supported by:

1. Product Status Alignment – The substitute maintains active manufacturing status, ensuring long-term availability and supply chain continuity
2. Regulatory Compliance – RoHS3 compliance and REACH unaffected status satisfy current environmental and regulatory requirements
3. Moisture Handling – Identical MSL 1 rating ensures equivalent moisture sensitivity characteristics
4. Manufacturing Support – Active product status indicates ongoing manufacturer support and quality assurance

Implementation Considerations:

Physical footprint, electrical ratings, and thermal characteristics of the substitute component must be validated against the original application circuit requirements. The SF-0603SP700M-2 provides specified electrical parameters (7 A current rating, 32 V DC voltage rating) and dimensional data (0603 package, 1.60mm x 0.80mm x 0.80mm) that enable direct technical evaluation for compatibility with the target application.

Frequently Asked Questions (FAQ)

Q: Why is the PSR-28026 listed as obsolete?

A: The PSR-28026 has reached end-of-life status and is no longer manufactured by Littelfuse Inc. Existing inventory remains available, but new production orders cannot be fulfilled from the manufacturer.

Q: What makes the SF-0603SP700M-2 a suitable substitute?

A: Both components share identical Moisture Sensitivity Level (MSL 1) ratings and are designed for surface mount applications. The SF-0603SP700M-2 is an active product with current manufacturing support, RoHS3 compliance, and REACH compliance status.

Q: Are there physical differences between the PSR-28026 and SF-0603SP700M-2?

A: The SF-0603SP700M-2 is specified in the 0603 (1608 Metric) package with dimensions of 1.60mm x 0.80mm x 0.80mm. The PSR-28026 package specifications are not provided in the available technical data. Physical compatibility must be verified against the target application circuit layout.

Q: What electrical parameters should be verified before substitution?

A: The SF-0603SP700M-2 provides the following electrical specifications: 7 A current rating, 32 V DC voltage rating, 0.008 Ohms DC cold resistance, 5 A²s melting I²t, and 80 A breaking capacity at rated voltage. These parameters must be compared against the original application requirements to confirm functional equivalence.

Q: Does the substitute component require different handling or storage procedures?

A: Both components share MSL 1 (Unlimited) moisture sensitivity rating, indicating identical moisture handling and storage requirements. Standard surface mount component handling procedures apply to both parts.

Q: What is the operating temperature range of the substitute?

A: The SF-0603SP700M-2 operates across a temperature range of -55°C to 150°C. This specification must be validated against the target application's thermal environment.

Q: Is the SF-0603SP700M-2 available in the same packaging format?

A: The SF-0603SP700M-2 is supplied in Tape & Reel (TR) packaging. The PSR-28026 packaging format is not specified in the available data. Packaging compatibility with existing assembly processes should be confirmed.