3SBP 5 Equivalent & Substitute Parts

Part Overview

The 3SBP 5 is a 5 A 250 V AC/DC slow-blow glass cartridge fuse in 3AB/3AG package format (1/4" x 1-1/4" axial). Manufactured by Bel Fuse Inc., this component is classified as obsolete. Due to its obsolete status and limited availability from the original manufacturer, equivalent substitute parts from active product lines are necessary to ensure design continuity and supply chain reliability for applications requiring this fuse specification.

Substiute Parts

3SBP 5

Bel Fuse Inc.In Stock: 7673SBP 5 Datasheet

Current PartRFQ

3SBP 5-R

Bel Fuse Inc.In Stock: 16933SBP 5-R Datasheet

DirectRFQ

0315005.HXP

Littelfuse Inc.In Stock: 11420315005.HXP Datasheet

DirectRFQ

0315005.MXP

Littelfuse Inc.In Stock: 7430315005.MXP Datasheet

DirectRFQ

0315005.MXSLP

Littelfuse Inc.In Stock: 8100315005.MXSLP Datasheet

DirectRFQ

0315005.VXP

Littelfuse Inc.In Stock: 12320315005.VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3SBP 5 is determined by strict equivalence across the following parameters:

• Current Rating: 5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 200 A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

All identified substitute parts meet these criteria. The 3SBP 5-R (Bel Fuse Inc.) is a direct variant with identical electrical and mechanical specifications. The Littelfuse 315 series parts (0315005.HXP, 0315005.MXP, 0315005.MXSLP, 0315005.VXP) are functionally equivalent alternatives from an active product line, with minor dimensional tolerances within acceptable limits (0.275" Dia x 1.275" L vs. 0.272" Dia x 1.280" L).

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the 3SBP 5, the following selection criteria apply:

Bel Fuse Inc. 3SBP 5-R: Direct equivalent with identical electrical and mechanical specifications. Recommended for designs requiring minimal component change while maintaining original manufacturer continuity. Offers ROHS3 compliance upgrade over the original 3SBP 5. Product status remains obsolete; long-term availability is not assured.

Littelfuse 315 Series (0315005.HXP, 0315005.MXP, 0315005.MXSLP, 0315005.VXP): Active product line alternatives with full functional equivalence. All variants are ROHS3 compliant and carry comprehensive international certifications (CE, CSA, UL, PSE, and regional approvals). These parts are recommended for new designs and long-term production requirements due to active product status and assured supply chain availability. Minor dimensional variations (0.003" diameter and 0.005" length differences) are within standard mechanical tolerances for 3AB/3AG cartridge fuses and do not affect electrical performance or mechanical fit in standard fuse holders.

Littelfuse 0315005.MXSLP: Includes additional regional certifications (KC, METI) suitable for applications requiring expanded geographic compliance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace a 3SBP 5 with a Littelfuse 315 series fuse?

A: Yes. The Littelfuse 0315005.HXP, 0315005.MXP, 0315005.MXSLP, and 0315005.VXP are electrically and mechanically equivalent to the 3SBP 5. All share identical current rating (5 A), voltage rating (250 V AC), response time (Slow Blow), package format (3AB/3AG), and breaking capacity (200 A). Minor dimensional differences fall within standard manufacturing tolerances for this fuse category and do not affect compatibility with standard fuse holders.

Q: What is the difference between the various Littelfuse 315 series part numbers?

A: The 0315005.HXP, 0315005.MXP, 0315005.MXSLP, and 0315005.VXP variants differ only in regional certification approvals. All four parts are electrically and mechanically identical. Selection should be based on the specific regulatory certifications required for your application's target market.

Q: Why does the 3SBP 5-R have the same specifications as the 3SBP 5 but different RoHS status?

A: The 3SBP 5-R represents a later production variant of the same fuse design with updated RoHS3 compliance. Both parts are functionally equivalent and interchangeable. However, both remain classified as obsolete products.

Q: Are there any performance differences between the Bel Fuse and Littelfuse alternatives?

A: All substitute parts meet identical electrical performance requirements: 5 A current rating, 250 V AC voltage rating, slow-blow response, and 200 A breaking capacity. The DC cold resistance of Littelfuse parts (0.0214 Ohms) is lower than the original 3SBP 5 (0.03 Ohms), which represents improved electrical efficiency and is not detrimental to circuit operation.

Q: Which substitute should I choose for a new design?

A: For new designs, select from the active Littelfuse 315 series (0315005.HXP, 0315005.MXP, 0315005.MXSLP, or 0315005.VXP) based on your required regional certifications. These parts offer assured long-term availability and full ROHS3 compliance. The 3SBP 5-R should not be used for new designs due to its obsolete status.

Q: Do I need to modify my PCB or fuse holder for Littelfuse substitutes?

A: No. The Littelfuse 315 series parts are designed for standard 3AB/3AG fuse holders. Minor dimensional variations are within acceptable mechanical tolerances and do not require any design modifications.