ICP-S0.5TN Equivalent & Substitute Parts

Part Overview

The ICP-S0.5TN is a 500 mA, 50 V AC/DC surface mount board mount fuse manufactured by Rohm Semiconductor. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part is housed in a 2-SMD, J-Lead package with fast-blow response characteristics suitable for circuit protection applications requiring compact form factors.

Substiute Parts

ICP-S0.5TN

Rohm SemiconductorIn Stock: 4170ICP-S0.5TN Datasheet

Current PartRFQ

0466.500NR

Littelfuse Inc.In Stock: 154400466.500NR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ICP-S0.5TN is determined by the following critical parameters:

• Current Rating: Must be 500 mA (exact match required for circuit protection integrity)
• Voltage Rating: Substitute must meet or exceed both AC and DC voltage ratings of 50 V
• Response Time: Fast Blow characteristic must be maintained
• Mounting Type: Surface Mount required for PCB compatibility
• Fuse Type: Board Mount (Cartridge Style Excluded) classification must be preserved
• RoHS Compliance: ROHS3 Compliant status required for regulatory alignment

The 0466.500NR from Littelfuse Inc. qualifies as a functional equivalent based on matching current rating (500 mA), fast-blow response, surface mount configuration, and board mount classification. The substitute provides higher voltage ratings (63 V AC/DC), which exceeds the original specification and ensures compatibility in applications operating at or below 50 V.

Parameter Comparison

Engineering Selection Recommendations

The 0466.500NR serves as the primary substitute for the obsolete ICP-S0.5TN based on product availability and regulatory compliance. The Littelfuse component maintains active production status, ensuring long-term procurement viability. Both parts carry ROHS3 Compliant certification, satisfying environmental regulatory requirements.

The 0466.500NR provides higher voltage ratings (63 V AC/DC versus 50 V), which ensures compatibility in applications operating at the original specification level. The substitute carries CSA and UL approvals, providing additional third-party validation for safety-critical applications.

Package geometry differs between the two parts (2-SMD, J-Lead versus 1206 3216 Metric), requiring PCB layout verification during design transition. The operating temperature range of the substitute (-55°C ~ 90°C) is narrower than the original (-55°C ~ 125°C), which must be evaluated for applications requiring extended high-temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the 0466.500NR directly replace the ICP-S0.5TN without circuit modification?

A: The 0466.500NR provides functional equivalence in current rating and response time. However, package geometry differs (1206 3216 Metric versus 2-SMD, J-Lead), requiring PCB footprint adjustment. Electrical performance remains compatible for circuits operating at or below 50 V.

Q: What is the significance of the higher voltage rating on the substitute part?

A: The 0466.500NR is rated for 63 V AC/DC, exceeding the original 50 V specification. This higher rating ensures the substitute functions correctly in applications designed for the original part and provides margin for voltage transients.

Q: Are there compatibility concerns with the different package styles?

A: Yes. The original ICP-S0.5TN uses a 2-SMD, J-Lead package, while the 0466.500NR uses a 1206 (3216 Metric) package. PCB footprint, land pattern, and assembly process parameters must be updated to accommodate the substitute package geometry.

Q: Does the substitute meet the same regulatory standards as the original?

A: Both parts are ROHS3 Compliant. The 0466.500NR carries additional CSA and UL approvals, providing enhanced third-party certification for safety-critical applications.

Q: What is the impact of the narrower operating temperature range on the substitute?

A: The 0466.500NR operates from -55°C to 90°C, compared to the original -55°C to 125°C range. Applications requiring operation above 90°C must evaluate alternative substitutes or confirm that the design does not exceed this thermal limit.

Q: How do the DC cold resistance values affect circuit performance?

A: The 0466.500NR exhibits higher DC cold resistance (0.248 Ohms versus 0.15 Ohms). This difference may introduce slightly higher voltage drop under normal circuit operation. Circuit analysis is recommended for applications with tight voltage margin specifications.