Equivalent & Substitute Parts for Altech Corporation 2620003

Part Overview

The Altech Corporation 2620003 is a 4A slow-blow fuse cartridge rated for 500 VAC operation in a 5AG (10mm x 38mm midget) package format. This component is classified as obsolete, indicating that direct procurement from the original manufacturer may be limited or unavailable. Identifying equivalent substitute parts ensures continuity of supply for maintenance, repair, and new assembly applications where this fuse specification is required.

Substiute Parts

2620003

Altech CorporationIn Stock: 12042620003 Datasheet

Current PartRFQ

FNQ-4

Eaton - Bussmann Electrical DivisionIn Stock: 1103FNQ-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Altech Corporation 2620003 is determined by strict equivalence across the following critical parameters:

• Current Rating: 4A (exact match required)
• Voltage Rating: 500 VAC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5AG, 10mm x 38mm midget cartridge (exact match required)
• Mounting Type: Requires Holder (exact match required)

The Eaton - Bussmann Electrical Division FNQ-4 meets all substitution criteria. Both parts are cartridge fuses with identical electrical ratings, response characteristics, and physical package specifications. The FNQ-4 maintains active product status and carries multiple regulatory approvals, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The Eaton - Bussmann Electrical Division FNQ-4 is the direct substitute for the Altech Corporation 2620003. Selection is based on the following factors:

• All critical electrical parameters (current, voltage, response time) are identical
• Physical package dimensions are equivalent within tolerance
• The FNQ-4 maintains active product status, ensuring ongoing availability
• The FNQ-4 carries CE, CSA, and UL certifications, providing regulatory compliance for industrial and electrical applications
• Both parts are ROHS3 compliant
• The FNQ-4 specifies a breaking capacity of 10kA at rated voltage, meeting industrial fuse performance standards

Frequently Asked Questions (FAQ)

Q: Can the Eaton FNQ-4 be used as a direct replacement for the Altech 2620003?

A: Yes. Both fuses are 4A, 500 VAC, slow-blow cartridge fuses in the 5AG (10mm x 38mm) package. They are mechanically and electrically equivalent and will function identically in circuits designed for the Altech part.

Q: Are there any dimensional differences between these fuses?

A: The length specification differs slightly: the Altech 2620003 is 1.496" (38.00mm) while the Eaton FNQ-4 is 1.500" (38.10mm). This 0.004" (0.10mm) difference is within standard manufacturing tolerance and does not affect holder compatibility or circuit performance.

Q: What is the significance of the FNQ-4 being an active product?

A: Active product status indicates that the Eaton FNQ-4 is currently manufactured and stocked by the supplier. This ensures reliable availability for procurement, whereas the obsolete Altech 2620003 may have limited or no inventory.

Q: Do both fuses require a holder for installation?

A: Yes. Both the Altech 2620003 and Eaton FNQ-4 are cartridge fuses that require a compatible fuse holder for installation. They are not panel-mount or screw-terminal fuses.

Q: What certifications does the Eaton FNQ-4 carry?

A: The Eaton FNQ-4 is certified by CE, CSA, and UL, meeting international and North American regulatory standards for electrical safety and performance.