A090.666 Equivalent & Substitute Parts

Part Overview

The A090.666 is a 4 A AC DC fuse cartridge manufactured by SCHURTER Inc. in a glass construction with 5mm x 20mm dimensions. This component requires a holder for installation and operates with slow-blow response characteristics. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

A090.666

SCHURTER Inc.In Stock: 909A090.666 Datasheet

Current PartRFQ

0001.2510

SCHURTER Inc.In Stock: 165340001.2510 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A090.666 is based on the following critical parameters that must remain constant:

• Current Rating: 4 A (exact match required)
• Package Dimensions: 5mm x 20mm (physical compatibility with existing holders)
• Response Time: Slow Blow (functional behavior in circuit protection)
• Mounting Configuration: Requires Holder (installation method compatibility)
• Manufacturer: SCHURTER Inc. (design consistency and quality assurance)

The substitute part 0001.2510 satisfies all these core requirements while offering enhanced specifications including defined voltage ratings (250 V AC / 150 V DC), ceramic construction, active product status, and international compliance certifications. The ceramic material provides improved thermal stability and breaking capacity compared to the glass construction of the original part.

Parameter Comparison

Engineering Selection Recommendations

The 0001.2510 serves as the direct functional equivalent to the obsolete A090.666. Both components share identical current ratings, package dimensions, response characteristics, and mounting requirements, ensuring mechanical and electrical compatibility within existing circuit designs and holder assemblies.

The 0001.2510 is classified as an active product with full international compliance certifications including CCC, cURus, KC, PSE/JET, and VDE approvals. This part carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for new equipment design and manufacturing.

The ceramic construction of the 0001.2510 provides defined voltage ratings (250 V AC / 150 V DC), specified breaking capacity (1.5 kA), and documented thermal performance (-55°C ~ 125°C operating range). These specifications establish clear performance boundaries for circuit protection applications where the original A090.666 lacked detailed electrical parameters.

Selection of the 0001.2510 eliminates obsolescence risk while maintaining design compatibility and providing enhanced technical documentation for compliance and safety validation.

Frequently Asked Questions (FAQ)

Q: Can the 0001.2510 be used as a direct replacement for the A090.666 in existing designs?

A: Yes. Both components share identical current ratings (4 A), package dimensions (5mm x 20mm), response time (slow blow), and mounting requirements (requires holder). The 0001.2510 installs in the same holder assemblies as the A090.666 without modification.

Q: What is the primary difference between the A090.666 and 0001.2510?

A: The A090.666 uses glass construction while the 0001.2510 uses ceramic construction. The ceramic design provides specified voltage ratings, defined breaking capacity, and documented thermal operating range. The 0001.2510 is an active product with current compliance certifications, whereas the A090.666 is obsolete.

Q: Are the physical dimensions identical between these two parts?

A: The package dimensions are both 5mm x 20mm, ensuring compatibility with standard holder assemblies. The 0001.2510 has a slightly larger diameter (5.20mm vs 5.00mm) but remains within the 5mm x 20mm package classification and holder compatibility range.

Q: What compliance certifications does the 0001.2510 carry?

A: The 0001.2510 holds approvals from CCC, cURus, KC, PSE/JET, and VDE. It is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for international equipment manufacturing and distribution.

Q: Is the 0001.2510 suitable for both AC and DC applications?

A: Yes. The 0001.2510 is rated for 250 V AC and 150 V DC operation, providing voltage protection across both AC and DC circuit configurations. The original A090.666 did not specify voltage ratings.

Q: What is the melting I²t value for the 0001.2510?

A: The melting I²t for the 0001.2510 is 62.4, defining the thermal energy threshold at which the fuse element melts under overcurrent conditions.