Littelfuse 37315000000 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 37315000000 is a 5 A, 250 V AC/DC board mount fuse with fast blow response characteristics, designed for through-hole radial mounting in vertical orientation. This component is classified as active product status and is widely used in power distribution and circuit protection applications requiring reliable overcurrent protection. Substitute parts become necessary due to inventory availability, lead time constraints, or design revision requirements while maintaining identical electrical and mechanical performance specifications.

Substiute Parts

37315000000

Littelfuse Inc.In Stock: 80137315000000 Datasheet

Current PartRFQ

37015000000

Littelfuse Inc.In Stock: 540937015000000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 37015000000 qualifies as a parametric equivalent to the 37315000000 based on the following critical substitution criteria:

Matching Electrical Parameters:

• Current Rating: 5 A (identical)
• Voltage Rating (AC): 250 V (identical)
• Response Time: Fast Blow (identical)
• Breaking Capacity @ Rated Voltage: 50 A (identical)

Matching Mechanical Parameters:

• Mounting Type: Through Hole (identical)
• Package / Case: Radial, Can, Vertical (identical)
• Physical Dimensions: 0.335" Dia × 0.315" H / 8.50 mm × 8.00 mm (identical)

Matching Environmental & Compliance Parameters:

• Operating Temperature Range: -40°C to 85°C (identical)
• RoHS Status: ROHS3 Compliant (identical)
• REACH Status: REACH Unaffected (identical)

Both parts belong to the Littelfuse TR5® fuse series and are classified as active products. The substitute part operates within identical electrical and mechanical tolerances, enabling direct board-level replacement without circuit redesign or PCB modification.

Parameter Comparison

Engineering Selection Recommendations

Both the 37315000000 and 37015000000 are active Littelfuse products suitable for direct substitution in 5 A, 250 V AC/DC board mount fuse applications. Selection between these parts should be based on the following criteria:

Primary Selection Factors:

• Approval agency requirements for your target market or application
• Melting I²t specification tolerance requirements (6.2 vs. 12)
• Inventory availability and lead time constraints

Compliance Considerations: The 37315000000 carries CSA and cULus certifications, making it suitable for North American applications. The 37015000000 carries broader international certifications (CCC, cURus, PSE, SEMKO, VDE), making it suitable for global markets including Asia-Pacific and European regions.

Both parts maintain identical electrical performance, mechanical fit, and environmental operating specifications, ensuring functional equivalence in circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can the 37015000000 be used as a direct replacement for the 37315000000 on an existing PCB?

A: Yes. Both parts share identical mounting type (through-hole), package configuration (radial, can, vertical), and physical dimensions (0.335" Dia × 0.315" H). No PCB modification or rework is required for substitution.

Q: What is the difference in Melting I²t between these two parts?

A: The 37315000000 has a Melting I²t of 6.2, while the 37015000000 has a Melting I²t of 12. This parameter affects the thermal energy required to melt the fuse element. Both parts maintain identical current rating (5 A) and response time (fast blow), but applications with specific I²t tolerance requirements should verify compatibility with the substitute part's specification.

Q: Are the approval certifications interchangeable?

A: The certifications differ between parts. The 37315000000 is certified by CSA and cULus (North American focus), while the 37015000000 is certified by CCC, cURus, PSE, SEMKO, and VDE (international focus). Select the part matching your target market's regulatory requirements.

Q: Do both parts operate within the same temperature range?

A: Yes. Both the 37315000000 and 37015000000 operate across the identical temperature range of -40°C to 85°C, ensuring equivalent thermal performance in your application.

Q: Are both parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.