PSR-28120-2 Equivalent & Substitute Parts

Part Overview

The PSR-28120-2 is a PTC Resettable Fuse manufactured by Littelfuse Inc. This component is classified as obsolete, requiring identification of active equivalent parts for continued system design and procurement. The PSR-28120-2 maintains RoHS Compliance and carries EAR99 export classification. Current inventory of 1,053 pieces is available as new original stock; however, active production alternatives are necessary for long-term component availability and supply chain continuity.

Substiute Parts

PSR-28120-2

Littelfuse Inc.In Stock: 1157PSR-28120-2 Datasheet

Current PartRFQ

1206L400SLWR

Littelfuse Inc.In Stock: 1081881206L400SLWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PSR-28120-2 is based on the following criteria derived from provided parameters:

Primary Substitution Criteria:

• Manufacturer: Littelfuse Inc. (same manufacturer ensures design continuity)
• Component Type: PTC Resettable Fuse (functional equivalence)
• RoHS Compliance: Maintained across substitute parts
• ECCN Classification: EAR99 (regulatory consistency)
• HTSUS Code: 8533.40.8070 (tariff classification alignment)

The 1206L400SLWR qualifies as a direct substitute based on these parameters. This part is manufactured by Littelfuse Inc., maintains identical regulatory classifications, and is currently in active production status with significantly higher inventory availability (108,100 pieces).

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The 1206L400SLWR is a qualified substitute for the PSR-28120-2 based on the following engineering factors:

1. Manufacturer Continuity: Both parts are manufactured by Littelfuse Inc., ensuring design philosophy and quality standards alignment.

2. Regulatory Compliance: The substitute part maintains EAR99 export classification and HTSUS code 8533.40.8070, ensuring no regulatory barriers to substitution.

3. RoHS Compliance Enhancement: The 1206L400SLWR achieves ROHS3 Compliance, representing an advancement over the RoHS Compliant status of the obsolete part.

4. Product Status: The transition from Obsolete to Active production status ensures long-term availability and supply chain reliability.

5. Certification Standards: The 1206L400SLWR carries cURus and TUV approvals, providing third-party validation of electrical and safety performance.

6. Moisture Sensitivity: MSL rating of 1 (Unlimited) indicates no moisture-related handling restrictions during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Why is the PSR-28120-2 no longer available?

A: The PSR-28120-2 has reached obsolete status. Littelfuse Inc. has transitioned production to active alternatives such as the 1206L400SLWR, which incorporates current manufacturing standards and compliance requirements.

Q: What are the key compatibility factors between PSR-28120-2 and 1206L400SLWR?

A: Both parts are PTC Resettable Fuses manufactured by Littelfuse Inc. with identical ECCN (EAR99) and HTSUS (8533.40.8070) classifications. Both maintain RoHS compliance. The substitute part is specified for Surface Mount 1206 (3216 Metric) package configuration.

Q: Does the 1206L400SLWR meet the same regulatory requirements as the PSR-28120-2?

A: Yes. The 1206L400SLWR maintains EAR99 export classification and HTSUS code 8533.40.8070, identical to the original part. Additionally, it achieves ROHS3 Compliance and carries cURus and TUV approvals.

Q: What is the electrical specification of the 1206L400SLWR?

A: The 1206L400SLWR is rated for 6V maximum voltage with 4A hold current (Ih), 8A trip current (It), and 50A maximum current. Initial resistance is 1 mOhms minimum, with post-trip resistance of 14 mOhms maximum. Time to trip is 2 seconds. Operating temperature range is -40°C to 85°C.

Q: Is the 1206L400SLWR available in sufficient quantity?

A: Yes. Current inventory of the 1206L400SLWR is 108,100 pieces as new original stock, providing substantial availability compared to the 1,053 pieces of the obsolete PSR-28120-2.

Q: What is the physical package configuration of the 1206L400SLWR?

A: The 1206L400SLWR is a Surface Mount component in 1206 (3216 Metric) package with concave configuration. Dimensions are 0.128" L x 0.065" W (3.25mm x 1.65mm) with maximum thickness of 0.055" (1.40mm).