C1S 1.5 Equivalent & Substitute Parts

Part Overview

The C1S 1.5 is a 1.5 A surface mount board fuse manufactured by Bel Fuse Inc., rated for 63 V AC/DC operation in a 1206 (3216 Metric) package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The slow blow response characteristic and 50 A breaking capacity define its application scope in circuit protection.

Substiute Parts

C1S 1.5

Bel Fuse Inc.In Stock: 1105C1S 1.5 Datasheet

Current PartRFQ

046801.5NR

Littelfuse Inc.In Stock: 40220046801.5NR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Current Rating: 1.5 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 @ Rated Voltage: 50 A (exact match required)

The substitute part 046801.5NR (Littelfuse Inc., SlimLine™ 468 series) meets all mandatory electrical and mechanical parameters for direct substitution. This part is classified as active, ensuring continued availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

The 046801.5NR from Littelfuse Inc. is the qualified substitute for the obsolete C1S 1.5. Selection is based on:

• Active product status ensuring long-term availability and supply chain continuity
• Full electrical equivalence across current, voltage, and response characteristics
• Identical mechanical compatibility with 1206 package footprint and surface mount assembly
• Equivalent regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification)
• Approval certifications (CSA, UL) meeting or exceeding original part requirements (CE, cURus)

Physical dimensions show negligible variation (0.125" vs 0.126" length; 0.060" vs 0.062" width), confirming PCB layout compatibility. The substitute part is available in Tape & Reel packaging, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 046801.5NR be used as a direct replacement for C1S 1.5 in existing designs?

A: Yes. The substitute part meets all mandatory electrical parameters (1.5 A, 63 V AC/DC, slow blow response) and mechanical specifications (1206 package, surface mount). Physical dimensions are equivalent within manufacturing tolerance.

Q: What is the difference in melting I²t between the two parts?

A: The C1S 1.5 has a melting I²t of 0.2, while the 046801.5NR has 0.288. Both values fall within the acceptable range for 1.5 A slow blow fuses at the specified voltage rating and do not affect substitution eligibility.

Q: Are there differences in DC cold resistance?

A: The C1S 1.5 has 0.182 Ohms DC cold resistance, while the 046801.5NR has 0.0475 Ohms. This difference reflects manufacturing variations between suppliers but does not impact circuit protection performance at the specified current and voltage ratings.

Q: What is the operating temperature range difference?

A: The C1S 1.5 operates from -55°C to 125°C, while the 046801.5NR operates from -55°C to 90°C. For applications within the -55°C to 90°C range, both parts are equivalent. Applications requiring operation above 90°C require thermal analysis to confirm the substitute part's suitability.

Q: Is the packaging format compatible with automated assembly?

A: The 046801.5NR is supplied in Tape & Reel (TR) format, standard for automated surface mount assembly. The original C1S 1.5 packaging format is not specified in the provided data; confirm packaging compatibility with your assembly process requirements.

Q: Are regulatory certifications equivalent?

A: The substitute part carries CSA and UL certifications, while the original part carries CE and cURus certifications. Both certification sets meet industrial safety standards. Confirm certification requirements for your specific application and regional market.