3SB 10 Equivalent & Substitute Parts

Part Overview

The 3SB 10 is a 10A 125VAC glass cartridge fuse manufactured by Bel Fuse Inc., designed for use with 3AB and 3AG holders. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing system maintenance and new designs. The 3SB 10-R serves as the direct active substitute, maintaining identical electrical and mechanical specifications while offering improved compliance status.

Substiute Parts

3SB 10

Bel Fuse Inc.In Stock: 8253SB 10 Datasheet

Current PartRFQ

3SB 10-R

Bel Fuse Inc.In Stock: 89643SB 10-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3SB 10-R qualifies as a direct substitute for the 3SB 10 based on the following criteria:

• Identical current rating: 10 A
• Identical voltage rating: 125 V AC
• Identical fuse type: Cartridge, Glass
• Identical response time: Slow Blow
• Identical package and case dimensions: 3AB, 3AG, 1/4" x 1-1/4"
• Identical breaking capacity: 10 kA
• Identical melting I²t: 817
• Identical operating temperature range: -55°C ~ 125°C
• Identical DC cold resistance: 0.01 Ohms
• Identical mechanical fit and holder compatibility

The substitution is based strictly on electrical and mechanical parameter equivalence. No deviations exist in the parameters that determine functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

The 3SB 10-R is the appropriate selection for all applications currently using or requiring the 3SB 10. The substitute part maintains complete electrical and mechanical equivalence while offering the following advantages:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance addresses environmental and regulatory requirements
• Expanded certification to include cULus provides additional market coverage
• Identical performance characteristics guarantee drop-in compatibility with existing 3AB and 3AG holder assemblies

No functional or performance compromises result from this substitution. The parts are electrically and mechanically interchangeable.

Frequently Asked Questions (FAQ)

Q: Can the 3SB 10-R be used as a direct replacement for the 3SB 10?

A: Yes. The 3SB 10-R is electrically and mechanically identical to the 3SB 10. All electrical parameters, including current rating, voltage rating, response time, and breaking capacity, are equivalent. The physical dimensions and holder compatibility are identical.

Q: Are there any compatibility issues with existing 3AB and 3AG holders?

A: No. The 3SB 10-R maintains the same package dimensions (0.250" Dia x 1.252" L) and is designed for use with 3AB and 3AG holders, identical to the original 3SB 10.

Q: What is the difference between the 3SB 10 and 3SB 10-R?

A: The primary differences are product status and compliance. The 3SB 10 is obsolete and RoHS non-compliant, while the 3SB 10-R is an active product with ROHS3 compliance. All electrical and mechanical specifications are identical.

Q: Does the 3SB 10-R meet the same safety certifications?

A: The 3SB 10-R carries CE, CSA, cULus, and PSE certifications. The original 3SB 10 carried CE, CSA, PSE, and UL certifications. Both meet recognized safety standards for this product category.

Q: Is the melting I²t value the same between both parts?

A: Yes. Both the 3SB 10 and 3SB 10-R have a melting I²t value of 817, ensuring identical thermal response characteristics.