Equivalent & Substitute Parts for Littelfuse 0662.315ZRLL

Part Overview

The Littelfuse 0662.315ZRLL is a 315 mA, 250 V AC/DC board mount radial fuse with fast blow response characteristics. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications. The part belongs to the LT-5™ 662 series and is designed for through-hole radial mounting in standard PCB applications requiring overcurrent protection at the specified current and voltage ratings.

Substiute Parts

0662.315ZRLL

Littelfuse Inc.In Stock: 10730662.315ZRLL Datasheet

Current PartRFQ

37003150000

Littelfuse Inc.In Stock: 175637003150000 Datasheet

DirectRFQ

0034.6009

SCHURTER Inc.In Stock: 111460034.6009 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0662.315ZRLL are qualified based on matching the following critical electrical and mechanical parameters:

• Current Rating: 315 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Board Mount, Cartridge Style Excluded
• Mounting Type: Through Hole
• Package / Case: Radial, Can, Vertical
• Response Time: Fast Blow
• Breaking Capacity @ Rated Voltage: 35A
• RoHS Compliance: ROHS3 Compliant

Two active substitute parts meet these criteria: Littelfuse 37003150000 (TR5® 370 series) and SCHURTER 0034.6009 (MSF 250 series). Both maintain electrical equivalence while offering improved product status and availability compared to the obsolete original part.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts provide active product status with established supply chains, addressing the obsolescence of the original 0662.315ZRLL component.

Littelfuse 37003150000 maintains manufacturer continuity within the Littelfuse product line and is available in Cut Tape packaging. This part carries certifications from CCC, cURus, SEMKO, and VDE, with specified operating temperature range of -40°C to 85°C. The melting I²t value of 0.1 represents a minor deviation from the original specification of 0.104, and the height dimension is reduced to 8.00mm compared to the original 8.45mm.

SCHURTER 0034.6009 provides cross-manufacturer substitution with the highest inventory availability and bulk packaging option. This part carries CCC, cURus, and VDE certifications with operating temperature range of -40°C to 85°C. The melting I²t value of 0.104 matches the original specification exactly, and the height dimension of 8.50mm represents the closest physical match to the original component.

Selection between these substitutes depends on design constraints regarding physical dimensions, preferred manufacturer, and packaging requirements for production workflows.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 37003150000 be used as a direct replacement for the 0662.315ZRLL?

A: Yes. Both parts share identical electrical specifications: 315 mA current rating, 250 V AC voltage rating, fast blow response, 35A breaking capacity, and radial through-hole mounting. The primary difference is the reduced height dimension (8.00mm vs. 8.45mm), which must be verified against PCB layout constraints.

Q: What is the difference between the Littelfuse and SCHURTER substitutes?

A: Both parts meet all critical electrical and mechanical parameters. The SCHURTER 0034.6009 provides exact melting I²t matching (0.104) and height dimension matching (8.50mm), while the Littelfuse 37003150000 offers manufacturer continuity. Packaging differs: Littelfuse is supplied in Cut Tape, SCHURTER in Bulk.

Q: Are there any compliance or certification differences between the substitutes?

A: The original part carries CSA, SEMKO, UL, and VDE approvals. The Littelfuse substitute carries CCC, cURus, SEMKO, and VDE approvals. The SCHURTER substitute carries CCC, cURus, and VDE approvals. All three parts are ROHS3 compliant.

Q: Does the operating temperature specification affect substitution?

A: The original part does not specify an operating temperature range. Both substitutes specify -40°C to 85°C operation. This expanded specification does not restrict substitution and may provide improved performance documentation for design validation.

Q: What packaging considerations apply to these substitutes?

A: The Littelfuse 37003150000 is supplied in Cut Tape packaging suitable for automated assembly. The SCHURTER 0034.6009 is supplied in Bulk packaging. Selection depends on production methodology and inventory management requirements.