3SBP 500-R Equivalent & Substitute Parts

Part Overview

The 3SBP 500-R is a 500 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in the 3AB/3AG form factor (1/4" x 1-1/4" axial). This component is classified as obsolete, making identification of active equivalent parts essential for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and approval certifications to ensure direct interchangeability in through-hole applications.

Substiute Parts

3SBP 500-R

Bel Fuse Inc.In Stock: 9403SBP 500-R Datasheet

Current PartRFQ

0315.500HXP

Littelfuse Inc.In Stock: 11900315.500HXP Datasheet

DirectRFQ

0315.500MXP

Littelfuse Inc.In Stock: 9340315.500MXP Datasheet

DirectRFQ

0315.500VXP

Littelfuse Inc.In Stock: 9410315.500VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3SBP 500-R is determined by strict equivalence across the following parameters:

• Current Rating: 500 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

All three substitute parts—0315.500HXP, 0315.500MXP, and 0315.500VXP—manufactured by Littelfuse Inc. meet these criteria. These parts are currently in active production status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The 3SBP 500-R is obsolete; direct replacement with an active equivalent is required for new procurements and system maintenance. All three Littelfuse substitutes—0315.500HXP, 0315.500MXP, and 0315.500VXP—are functionally equivalent and currently in active production.

Selection among the three Littelfuse options should be based on:

• Inventory availability and lead time requirements
• Supplier preference and established procurement channels
• Compliance certifications: All three parts carry CE, CSA, and UL approvals, meeting the regulatory requirements of the original 3SBP 500-R

No technical differentiation exists between the three substitute parts with respect to the provided electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can 0315.500HXP, 0315.500MXP, or 0315.500VXP be used as direct replacements for 3SBP 500-R?

A: Yes. All three Littelfuse parts are direct substitutes. They match the 3SBP 500-R across all critical parameters: 500 mA current rating, 250 V AC voltage rating, slow-blow response, 3AB/3AG package, and through-hole mounting. All are ROHS3 compliant and carry equivalent regulatory approvals.

Q: What is the difference between 0315.500HXP, 0315.500MXP, and 0315.500VXP?

A: Based on the provided specifications, these three parts are electrically and mechanically identical. Differences, if any, relate to internal construction or manufacturing process variants not specified in the provided data. Selection should be based on availability and procurement preference.

Q: Are the physical dimensions identical between the 3SBP 500-R and the Littelfuse substitutes?

A: The parts are mechanically compatible. The 3SBP 500-R measures 0.272" Dia x 1.280" L (6.90mm x 32.50mm). The Littelfuse substitutes measure 0.275" Dia x 1.275" L (6.99mm x 32.39mm). These minor dimensional variations remain within the 3AB/3AG form factor tolerance and do not affect through-hole mounting compatibility.

Q: Do all substitute parts carry the same regulatory approvals as the original 3SBP 500-R?

A: The 3SBP 500-R carries CE, CSA, and cULus approvals. The Littelfuse substitutes carry CE, CSA, and UL approvals. Both certification sets meet equivalent regulatory requirements for 250 V AC/DC fuse applications.

Q: Is the 3SBP 500-R still available for purchase?

A: The 3SBP 500-R is classified as obsolete. New designs and system replacements should specify one of the active Littelfuse equivalents: 0315.500HXP, 0315.500MXP, or 0315.500VXP.