A6T90 Equivalent & Substitute Parts

Part Overview

The A6T90 is a Class T fast-acting fuse manufactured by Mersen USA Newburyport-MA L.L.C. with a 200kA breaking capacity at rated voltage. This component is designed for electrical and industrial applications requiring fast-blow response characteristics. The part is currently active in production and available in box packaging with 654 units in stock. Due to supply chain considerations, manufacturing transitions, or application-specific requirements, equivalent substitute parts may be necessary to maintain system continuity.

Substiute Parts

A6T90

Mersen USA Newburyport-MA L.L.C.In Stock: 695A6T90 Datasheet

Current PartRFQ

JJS-90

Eaton - Bussmann Electrical DivisionIn Stock: 1023JJS-90 Datasheet

SimilarRFQ

JLLS090.V

Littelfuse Inc.In Stock: 743JLLS090.V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the A6T90 is determined by the following critical parameters:

• Fuse Class: T (Class T fast-acting fuses)
• Response Time: Fast Blow
• Breaking Capacity: 200kA at rated voltage
• Current Rating: 90A
• Voltage Rating - AC: 600 VAC
• Fuse Type: Cartridge
• Mounting Type: Bolt Mount
• Package / Case: Cylindrical, Blade Terminal (Bolt)

The substitute parts JJS-90 and JLLS090.V meet all critical electrical and mechanical parameters required for direct substitution in applications originally specified for the A6T90.

Parameter Comparison

Engineering Selection Recommendations

Both JJS-90 and JLLS090.V are qualified substitutes for the A6T90 based on matching electrical specifications and mechanical form factors. Selection between substitutes should consider the following factors:

JJS-90 (Eaton - Bussmann Electrical Division): This substitute maintains identical electrical ratings and breaking capacity. It carries CE, CSA, and UL certifications and is RoHS compliant. The part is available in bulk packaging with 990 units in stock.

JLLS090.V (Littelfuse Inc.): This substitute matches all electrical specifications and additionally provides 300 VDC voltage rating capability. It carries CE, CSA, and UL certifications and is ROHS3 compliant. The part is available in box packaging with 694 units in stock.

For applications requiring DC voltage capability, JLLS090.V provides extended operational range. For AC-only applications, both substitutes are functionally equivalent. RoHS compliance requirements should be evaluated against system-level environmental and regulatory mandates.

Frequently Asked Questions (FAQ)

Q: Can JJS-90 and JLLS090.V be used interchangeably with A6T90?

A: Yes, both parts meet the critical electrical and mechanical parameters: 90A current rating, 600 VAC voltage rating, Class T fast-blow response, 200kA breaking capacity, and bolt-mount cylindrical cartridge form factor. Physical dimensions are within acceptable tolerance for standard bolt-mount installations.

Q: What is the difference between JJS-90 and JLLS090.V?

A: The primary difference is voltage rating capability. JLLS090.V supports both 600 VAC and 300 VDC operation, while JJS-90 is rated for 600 VAC. Both share identical AC ratings, current capacity, and breaking capacity. Secondary differences include manufacturer, packaging format (bulk vs. box), and RoHS compliance level.

Q: Does the A6T90 RoHS non-compliance status affect substitution?

A: RoHS compliance is a regulatory and environmental consideration, not an electrical substitution criterion. If the application or system-level requirements mandate RoHS compliance, both JJS-90 and JLLS090.V are compliant alternatives. If RoHS compliance is not required, the A6T90 remains functionally valid.

Q: Are there packaging considerations when substituting these parts?

A: A6T90 is supplied in box packaging, JJS-90 in bulk packaging, and JLLS090.V in box packaging. Packaging format does not affect electrical or mechanical compatibility. Procurement and inventory management processes should account for packaging differences.

Q: What certifications apply to these fuses?

A: JJS-90 and JLLS090.V both carry CE, CSA, and UL certifications. Certification status for A6T90 is not specified in available documentation. For applications requiring specific certification compliance, JJS-90 and JLLS090.V provide documented approval agency validation.