PSR-28473-2 Equivalent & Substitute Parts

Part Overview

The PSR-28473-2 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. PTC resettable fuses provide overcurrent protection with automatic recovery capability, making substitutes critical for applications requiring uninterrupted circuit protection functionality.

Substiute Parts

PSR-28473-2

Littelfuse Inc.In Stock: 4042PSR-28473-2 Datasheet

Current PartRFQ

1206L400SLWR

Littelfuse Inc.In Stock: 1081881206L400SLWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete PSR-28473-2 is based on the following criteria derived from provided parameters:

Primary Substitution Criteria:

• Manufacturer alignment (Littelfuse Inc.)
• Component category (PTC Resettable Fuse)
• Regulatory compliance (RoHS status, ECCN classification, HTSUS code)
• Active product status for long-term availability

The substitute part 1206L400SLWR meets all substitution requirements through identical manufacturer origin, matching regulatory classifications, and active product status. This part is available in high inventory volume (108,100 Pcs), ensuring supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The 1206L400SLWR is the qualified substitute for the obsolete PSR-28473-2 based on the following engineering factors:

Regulatory Compliance: Both parts share identical ECCN (EAR99) and HTSUS (8533.40.8070) classifications, ensuring compliance with export control and tariff regulations. The substitute maintains RoHS compliance through ROHS3 certification, meeting current environmental standards.

Manufacturer Continuity: Both components originate from Littelfuse Inc., the original manufacturer, ensuring design consistency and quality assurance standards.

Product Availability: The substitute part maintains active product status with substantial inventory (108,100 Pcs), providing long-term procurement security compared to the obsolete original part.

Certification: The 1206L400SLWR carries cURus and TUV approvals, supporting applications requiring third-party safety validation.

Frequently Asked Questions (FAQ)

Q: Why is the PSR-28473-2 no longer available? A: The PSR-28473-2 has reached obsolete status. The 1206L400SLWR is the active equivalent from the same manufacturer, Littelfuse Inc., providing continued access to PTC resettable fuse technology.

Q: What are the key electrical parameters for substitution? A: The substitute part 1206L400SLWR specifies 6V maximum voltage and 4A hold current (Ih). These parameters define the protective characteristics of the resettable fuse. Verify your application requirements align with these ratings before implementation.

Q: What is the package format of the substitute part? A: The 1206L400SLWR uses a 1206 (3216 Metric) surface mount package with concave geometry. Physical dimensions are 0.128" L x 0.065" W (3.25mm x 1.65mm) with maximum thickness of 0.055" (1.40mm).

Q: Are there regulatory differences between the original and substitute? A: Both parts share identical ECCN and HTSUS classifications. The substitute carries ROHS3 compliance, representing current environmental standards, while the original specified RoHS compliance.

Q: What certifications does the substitute part hold? A: The 1206L400SLWR carries cURus and TUV approvals, supporting safety-critical applications requiring independent certification.

Q: What is the operating temperature range? A: The substitute part operates across -40°C to 85°C, covering standard industrial and commercial temperature environments.