C1S 2 Surface Mount Fuse - Equivalent & Substitute Parts

Part Overview

The C1S 2 is a 2A 63V surface mount board fuse manufactured by Bel Fuse Inc. in 1206 (3216 Metric) package format. This component is classified as Obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications. The slow blow response characteristic and 50A breaking capacity at rated voltage define its operational profile in circuit protection applications.

Substiute Parts

C1S 2

Bel Fuse Inc.In Stock: 739C1S 2 Datasheet

Current PartRFQ

0468002.NR

Littelfuse Inc.In Stock: 163800468002.NR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete C1S 2 is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 2 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)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)

The substitute part 0468002.NR from Littelfuse Inc. meets all mandatory electrical and mechanical criteria for direct substitution. Both parts share identical current, voltage, response time, and package specifications. Dimensional variations are within acceptable tolerances for surface mount assembly processes.

Parameter Comparison

Engineering Selection Recommendations

The 0468002.NR (Littelfuse Inc. SlimLine™ 468 series) is the direct substitute for the obsolete C1S 2. Both components satisfy identical electrical specifications for current, voltage, and response time characteristics. The substitute part carries Active product status with current manufacturing support and availability.

Compliance certifications differ between the two parts: the C1S 2 holds CE and cURus approval, while the 0468002.NR holds CSA and UL approval. Both maintain ROHS3 compliance and REACH Unaffected status. The substitute part operates within a reduced temperature range (-55°C to 90°C versus -55°C to 125°C), which must be evaluated against specific application requirements.

The 0468002.NR exhibits lower DC cold resistance (0.0324 Ohms versus 0.105 Ohms) and higher melting I²t (0.506 versus 0.26), reflecting design differences in the fuse element. These characteristics remain within acceptable parameters for 2A slow blow fuse operation at 63V.

Frequently Asked Questions (FAQ)

Q: Can the 0468002.NR directly replace the C1S 2 in existing designs?

A: Yes. Both parts share identical current rating (2A), voltage rating (63V AC/DC), response time (Slow Blow), and package format (1206). Surface mount assembly compatibility is maintained.

Q: What is the significance of the different breaking capacity ratings?

A: The C1S 2 specifies 50A breaking capacity at rated voltage. The 0468002.NR specifies 35A AC and 50A DC. The DC rating matches the original part. The AC rating difference reflects manufacturer design specifications and does not affect substitution validity for applications within rated parameters.

Q: Does the operating temperature range difference affect substitution?

A: The C1S 2 operates from -55°C to 125°C, while the 0468002.NR operates from -55°C to 90°C. Applications requiring operation above 90°C must evaluate this specification against actual thermal requirements.

Q: Are the certification differences significant?

A: The C1S 2 carries CE and cURus certifications. The 0468002.NR carries CSA and UL certifications. Both maintain ROHS3 compliance. Certification requirements depend on end-application regulatory standards and must be verified against specific market or industry requirements.

Q: What do the DC cold resistance and melting I²t differences indicate?

A: These parameters reflect internal fuse element design differences between manufacturers. Both values remain within acceptable ranges for 2A slow blow fuse operation. The lower resistance and higher I²t of the substitute part indicate a different fuse element composition while maintaining equivalent protection characteristics.