3SBP 500 Equivalent & Substitute Parts

Part Overview

The 3SBP 500 is a 500 mA, 250 V AC/DC slow-blow glass cartridge fuse with 3AB/3AG package configuration and through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing maintenance and new design implementations. The fuse is designed for circuit protection applications requiring slow-blow response characteristics and is approved by CE, CSA, PSE, and UL standards.

Substiute Parts

3SBP 500

Bel Fuse Inc.In Stock: 9313SBP 500 Datasheet

Current PartRFQ

3SBP 500-R

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

DirectRFQ

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 eligibility for the 3SBP 500 is determined by the following critical parameters:

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

All substitute parts listed below meet these core electrical and mechanical requirements. Variations in secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and approval agencies do not disqualify substitution but may influence selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Ongoing Production:

The Littelfuse 315 series parts (0315.500HXP, 0315.500MXP, 0315.500VXP) are preferred substitutes. These components are classified as active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment with current environmental standards. All three Littelfuse variants meet the core electrical and mechanical specifications of the 3SBP 500.

For Legacy System Maintenance:

The 3SBP 500-R from Bel Fuse Inc. provides a direct manufacturer alternative with ROHS3 compliance and cULus certification. This part maintains compatibility with existing designs while offering improved regulatory status compared to the original 3SBP 500.

Compliance Considerations:

The original 3SBP 500 is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, supporting compliance requirements for applications subject to environmental regulations. All substitute parts maintain CE and CSA certifications, with UL or cULus approval across the product range.

Frequently Asked Questions (FAQ)

Q: Can the 0315.500HXP, 0315.500MXP, and 0315.500VXP be used interchangeably with the 3SBP 500?

A: Yes. All three Littelfuse parts meet the core electrical and mechanical requirements: 500 mA current rating, 250 V AC voltage rating, slow-blow response, 3AB/3AG package configuration, and through-hole mounting. Physical dimensions are within acceptable tolerance (0.275" Dia x 1.275" L versus 0.272" Dia x 1.280" L).

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

A: These three Littelfuse parts are electrically and mechanically identical. They share the same current rating, voltage rating, response time, package configuration, breaking capacity, melting I²t, DC cold resistance, operating temperature range, and compliance certifications. Selection between these variants should be based on packaging availability and supplier inventory.

Q: Why does the 3SBP 500-R have a higher breaking capacity (200A) than the original 3SBP 500 (35A)?

A: Breaking capacity is a secondary parameter that does not affect substitution eligibility. Both parts meet the core requirements for 500 mA, 250 V slow-blow cartridge fuses. The higher breaking capacity of the 3SBP 500-R provides additional margin in fault conditions but does not impact normal circuit protection operation.

Q: Are there any dimensional differences between the 3SBP 500 and Littelfuse 315 series substitutes?

A: Minor dimensional variations exist. The 3SBP 500 measures 0.272" Dia x 1.280" L (6.90mm x 32.50mm), while Littelfuse 315 series parts measure 0.275" Dia x 1.275" L (6.99mm x 32.39mm). These differences are within standard mechanical tolerances for 3AB/3AG package configuration and do not prevent physical installation in standard fuse holders.

Q: Which substitute part should be selected for new product designs?

A: The Littelfuse 315 series (0315.500HXP, 0315.500MXP, or 0315.500VXP) are recommended for new designs. These parts are active products with ROHS3 compliance, ensuring regulatory alignment and long-term supply availability. The 3SBP 500-R is an acceptable alternative if Bel Fuse Inc. compatibility is required.