C1S 1 Surface Mount Fuse - Equivalent & Substitute Parts

Part Overview

The C1S 1 is a 1 A, 63 V AC/DC surface mount board fuse manufactured by Bel Fuse Inc. in 1206 (3216 Metric) package format. This component is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The slow blow response characteristic and 50 A breaking capacity at rated voltage define its application scope in circuit protection.

Substiute Parts

C1S 1

Bel Fuse Inc.In Stock: 695C1S 1 Datasheet

Current PartRFQ

0468001.NR

Littelfuse Inc.In Stock: 241800468001.NR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the C1S 1 is determined by strict equivalence across the following parameters:

• Current Rating: 1 A (exact match required)
• Voltage Rating: 63 V AC and 63 V DC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 1206 (3216 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Breaking Capacity: 50 A (exact match required)

The substitute part 0468001.NR (Littelfuse Inc., SlimLine™ 468 series) meets all mandatory electrical and mechanical parameters. Both components are ROHS3 compliant and operate within compatible temperature ranges, ensuring functional interchangeability in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

The 0468001.NR (Littelfuse Inc.) is a direct functional equivalent to the obsolete C1S 1. Both components satisfy identical electrical specifications (1 A, 63 V AC/DC, slow blow, 50 A breaking capacity) and mechanical requirements (1206 surface mount package).

Key considerations for selection:

• The 0468001.NR operates within a narrower temperature range (-55°C ~ 90°C) compared to the C1S 1 (-55°C ~ 125°C). Applications requiring operation above 90°C must retain the original C1S 1 or identify alternative solutions.
• Approval certifications differ: C1S 1 carries CE and cURus approval, while 0468001.NR carries CSA and UL approval. Design compliance requirements must align with the applicable certification standard for the target application.
• The 0468001.NR is in active production with substantial inventory availability (24,100 pcs), ensuring supply continuity for new designs and production support.

Frequently Asked Questions (FAQ)

Q: Can the 0468001.NR replace the C1S 1 in all applications?

A: The 0468001.NR is electrically and mechanically equivalent for applications operating within -55°C to 90°C. Applications requiring operation above 90°C require alternative solutions, as the C1S 1 supports -55°C to 125°C.

Q: Are the approval certifications interchangeable?

A: No. The C1S 1 carries CE and cURus certifications, while the 0468001.NR carries CSA and UL certifications. Design compliance must align with the applicable regulatory standard for the target market and application.

Q: Is the 1206 package identical between both parts?

A: Both components use the 1206 (3216 Metric) surface mount package. Physical dimensions are nearly identical (C1S 1: 3.20mm x 1.58mm x 0.58mm; 0468001.NR: 3.18mm x 1.52mm x 0.58mm), ensuring PCB footprint compatibility.

Q: What is the difference in DC cold resistance between the two parts?

A: The C1S 1 has 0.285 Ohms DC cold resistance, while the 0468001.NR has 0.0825 Ohms. This difference does not affect substitution eligibility, as both values fall within acceptable ranges for 1 A fuses in this category.

Q: Why is the C1S 1 marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 0468001.NR provides functional continuity for designs currently using the C1S 1 and supports new designs requiring equivalent protection characteristics.