Equivalent & Substitute Parts for Littelfuse 0664001.ZRLL Board Mount Fuse

Part Overview

The Littelfuse 0664001.ZRLL is a 1 A, 250 V AC/DC board mount fuse with radial, can, vertical package configuration. This component is classified as Obsolete, making identification of active equivalent parts essential for ongoing design support and procurement. The part operates within a -40°C to 85°C temperature range and meets multiple international safety approvals including UL, VDE, CSA, and CCC standards.

Substiute Parts

0664001.ZRLL

Littelfuse Inc.In Stock: 7700664001.ZRLL Datasheet

Current PartRFQ

38211000000

Littelfuse Inc.In Stock: 2870838211000000 Datasheet

DirectRFQ

0034.6915

SCHURTER Inc.In Stock: 116910034.6915 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0664001.ZRLL is determined by strict alignment of the following electrical and mechanical parameters:

• Current Rating: 1 A (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: Slow Blow
• Breaking Capacity @ Rated Voltage: 100 A
• Operating Temperature Range: -40°C ~ 85°C minimum

Both identified substitute parts meet these core electrical and mechanical criteria. Variations in secondary parameters such as melting I²t, DC cold resistance, physical dimensions within tolerance, and approval agency certifications do not preclude substitution when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are classified as Active products, providing long-term procurement stability compared to the Obsolete status of the 0664001.ZRLL.

Littelfuse 38211000000 maintains manufacturer continuity with the original part. This part carries UL and CSA certifications alongside CCC, SEMKO, VDE, KC, and PSE/JET approvals. The TR5® 382 series offers equivalent electrical performance with a slightly lower DC cold resistance (0.0625 Ohms versus 0.123 Ohms) and marginally higher melting I²t (4.85 versus 4.4). Physical height is reduced to 8.00mm compared to 8.45mm, which may require PCB layout verification for clearance-constrained applications.

SCHURTER 0034.6915 provides cross-manufacturer substitution within the MXT 250 series. This part holds CCC, cURus, KC, PSE/JET, and VDE certifications. The melting I²t value (4.4) matches the original part exactly. Physical dimensions are 8.50mm x 8.50mm, representing a 0.05mm increase in height. DC cold resistance is not specified in available documentation.

Both parts satisfy the core electrical and mechanical requirements for direct substitution. Selection between them depends on certification requirements for the target application, PCB layout constraints related to component height, and procurement availability.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 38211000000 be used as a direct replacement for the 0664001.ZRLL?

A: Yes. Both parts share identical current rating (1 A), voltage rating (250 V AC), response time (Slow Blow), mounting type (Through Hole), package configuration (Radial, Can, Vertical), and breaking capacity (100 A). The 38211000000 is Active status, ensuring continued availability. Physical height differs by 0.45mm (8.00mm versus 8.45mm), requiring verification that PCB layout accommodates this reduction.

Q: Can the SCHURTER 0034.6915 be used as a direct replacement for the 0664001.ZRLL?

A: Yes. Both parts meet identical electrical specifications: 1 A current rating, 250 V AC voltage rating, Slow Blow response, Through Hole mounting, Radial Can Vertical package, and 100 A breaking capacity. The 0034.6915 is Active status. Physical height is 8.50mm, representing a 0.05mm increase from the original 8.45mm specification, which is typically within standard PCB tolerance.

Q: What are the key differences between the two substitute parts?

A: The Littelfuse 38211000000 offers lower DC cold resistance (0.0625 Ohms) and slightly higher melting I²t (4.85). The SCHURTER 0034.6915 matches the original melting I²t (4.4) and provides a more conservative height increase. Certification portfolios differ: the Littelfuse part includes UL and CSA, while the SCHURTER part includes cURus. Both hold CCC, SEMKO/SEMKO, KC, PSE/JET, and VDE certifications.

Q: Are there packaging differences between these substitute parts?

A: Yes. The 0664001.ZRLL was supplied in standard packaging (not specified). The 38211000000 is available in Cut Tape (CT) packaging. The 0034.6915 is supplied in Bulk packaging. Packaging selection should align with assembly process requirements and inventory management practices.

Q: Do all three parts meet RoHS compliance?

A: Yes. The 0664001.ZRLL, 38211000000, and 0034.6915 are all ROHS3 Compliant.

Q: What is the operating temperature range for these fuses?

A: All three parts operate within -40°C to 85°C, providing identical thermal performance across the specified range.