Littelfuse 37305000000 Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 37305000000 is a 500 mA, 250 V AC/DC board mount fuse in radial, can, vertical package configuration. This fast-blow fuse is designed for through-hole mounting applications requiring overcurrent protection in electronic circuits. The part is currently active in production with 1,107 units in stock. Equivalent substitute parts may be required due to packaging format availability, supply chain considerations, or specific approval agency requirements for particular applications.

Substiute Parts

37305000000

Littelfuse Inc.In Stock: 114837305000000 Datasheet

Current PartRFQ

37005000000

Littelfuse Inc.In Stock: 309237005000000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 37005000000 qualifies as a parametric equivalent to the 37305000000 based on the following critical substitution criteria:

Matching Parameters (Substitution Basis):

• Current Rating: 500 mA (identical)
• Voltage Rating (AC): 250 V (identical)
• Response Time: Fast Blow (identical)
• Mounting Type: Through Hole (identical)
• Package / Case: Radial, Can, Vertical (identical)
• Physical Dimensions: 0.335" Dia x 0.315" H / 8.50mm x 8.00mm (identical)
• Operating Temperature Range: -40°C ~ 85°C (identical)
• RoHS Status: ROHS3 Compliant (identical)

Packaging Difference: The primary distinction between these parts is the packaging format: the 37305000000 is supplied in Tape & Box (TB) format, while the 37005000000 is supplied in Cut Tape (CT) format. Both formats contain electrically and mechanically identical components suitable for automated assembly processes.

Parameter Comparison

Engineering Selection Recommendations

Both the 37305000000 and 37005000000 are active production parts with ROHS3 compliance and REACH unaffected status, making them suitable for current electronic design requirements.

Selection Basis:

The 37305000000 (main part) carries CSA and cULus approvals, making it the preferred choice for applications requiring North American certification standards.

The 37005000000 (substitute) carries broader international approvals including CCC, cURus, SEMKO, and VDE certifications, making it suitable for applications requiring European or international compliance standards.

Both parts are electrically and mechanically interchangeable for through-hole board mount applications with 500 mA, 250 V AC/DC protection requirements. Selection between these parts should be based on:

1. Required approval agency certifications for the target application
2. Packaging format compatibility with assembly equipment (Tape & Box versus Cut Tape)
3. Supply chain availability and lead time requirements

Frequently Asked Questions (FAQ)

Q: Can the 37005000000 be used as a direct replacement for the 37305000000?

A: Yes. Both parts share identical electrical ratings (500 mA, 250 V AC/DC), response characteristics (Fast Blow), physical dimensions (0.335" Dia x 0.315" H), and mounting configuration (Through Hole, Radial, Can, Vertical). The primary difference is packaging format and approval agency certifications.

Q: What is the difference between Tape & Box (TB) and Cut Tape (CT) packaging?

A: Tape & Box packaging includes a full reel of components on carrier tape with a protective box. Cut Tape packaging provides the same components on carrier tape but in smaller quantities without the full reel box. Both formats are suitable for automated pick-and-place assembly equipment.

Q: Are there differences in electrical performance between these parts?

A: While both parts meet the same current and voltage ratings, the 37305000000 has a higher breaking capacity (50A versus 35A) and lower melting I²t value (0.025 versus 0.042). These differences reflect design variations within the TR5® series but do not affect basic overcurrent protection function at the 500 mA rating.

Q: Which part should I select for international applications?

A: The 37005000000 carries broader international certifications (CCC, cURus, SEMKO, VDE) compared to the 37305000000 (CSA, cULus). For applications requiring European or Asian market compliance, the 37005000000 is the appropriate choice.

Q: Are both parts RoHS compliant?

A: Yes. Both the 37305000000 and 37005000000 are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.