3SBP 100-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 3SBP 100-R is a 100 mA, 250 V AC/DC glass cartridge fuse manufactured by Bel Fuse Inc. in the 3AB, 3AG form factor with slow-blow response characteristics. This part is classified as obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs. Littelfuse Inc. offers direct functional equivalents in their 315 series that maintain electrical and mechanical compatibility while providing active product status and current manufacturing support.

Substiute Parts

3SBP 100-R

Bel Fuse Inc.In Stock: 12133SBP 100-R Datasheet

Current PartRFQ

0315.100HXP

Littelfuse Inc.In Stock: 11000315.100HXP Datasheet

DirectRFQ

0315.100MXP

Littelfuse Inc.In Stock: 10570315.100MXP Datasheet

DirectRFQ

0315.100VXP

Littelfuse Inc.In Stock: 11980315.100VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3SBP 100-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 100 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum required)
• RoHS Compliance: ROHS3 Compliant (required)

All three Littelfuse 315 series parts (0315.100HXP, 0315.100MXP, 0315.100VXP) meet these substitution criteria. These parts are functionally interchangeable with the 3SBP 100-R in applications requiring 100 mA protection at 250 V AC/DC with slow-blow characteristics in standard 3AG form factor.

Parameter Comparison

Engineering Selection Recommendations

The 3SBP 100-R is obsolete and no longer in active production. All three Littelfuse 315 series substitutes (0315.100HXP, 0315.100MXP, 0315.100VXP) are active products with current manufacturing support and equivalent electrical specifications.

Selection among the three Littelfuse alternatives should be based on packaging availability and supply chain requirements, as all three parts are electrically and mechanically identical. All substitute parts maintain ROHS3 compliance and carry CE, CSA, and UL certifications, meeting the regulatory requirements of the original 3SBP 100-R.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 315 series parts directly replace the 3SBP 100-R in existing designs?

A: Yes. The 0315.100HXP, 0315.100MXP, and 0315.100VXP are direct functional equivalents. All maintain identical current rating (100 mA), voltage rating (250 V AC), package form factor (3AB, 3AG), response time (slow blow), and operating temperature range (-55°C ~ 125°C). Physical dimensions are within acceptable tolerance for standard 3AG fuse holders.

Q: What is the difference between 0315.100HXP, 0315.100MXP, and 0315.100VXP?

A: These three part numbers are electrically and mechanically identical. The differences are in packaging configuration (all listed as Bulk). Selection should be based on supply availability and procurement requirements.

Q: Are there any compliance or certification differences between the original and substitute parts?

A: No. Both the 3SBP 100-R and all three Littelfuse substitutes are ROHS3 compliant. The original part carries CE, CSA, cULus, and PSE approvals. The Littelfuse substitutes carry CE, CSA, and UL approvals, covering the primary regulatory requirements.

Q: What are the dimensional tolerances between the original and substitute parts?

A: The 3SBP 100-R measures 0.272" Dia x 1.280" L (6.90mm x 32.50mm). The Littelfuse 315 series measures 0.275" Dia x 1.275" L (6.99mm x 32.39mm). These minor variations are within standard tolerance for 3AG form factor fuses and compatible with existing fuse holders.

Q: Can these parts be used interchangeably in the same circuit?

A: Yes. All substitute parts maintain the same electrical characteristics: 100 mA current rating, 250 V AC/DC voltage rating, and slow-blow response time. They are suitable for direct substitution in applications requiring protection at these specifications.