A6T150 Equivalent & Substitute Parts

Part Overview

The A6T150 is a Class T fast-acting fuse manufactured by Mersen USA Newburyport-MA L.L.C., designed for high-capacity electrical protection applications. This component is currently active in production with 837 units in stock. The part is RoHS non-compliant and carries a breaking capacity of 200kA at rated voltage. Identifying equivalent substitute parts is essential for supply chain continuity, inventory optimization, and ensuring uninterrupted availability in applications where this fuse type is specified.

Substiute Parts

A6T150

Mersen USA Newburyport-MA L.L.C.In Stock: 869A6T150 Datasheet

Current PartRFQ

JLLS150.X

LittelfuseIn Stock: 1027JLLS150.X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A6T150 are identified based on the following critical electrical and mechanical parameters:

• Fuse Class: T (time-delay fuse classification)
• Response Time: Fast Acting
• Breaking Capacity: 200kA at rated voltage
• Current Rating: 150A
• Voltage Rating: 600 VAC / 300 VDC
• Fuse Type: Cartridge with bolt mount configuration
• Packaging: Box

The JLLS150.X from Littelfuse meets these substitution criteria as a Class T, fast-blow cartridge fuse with identical current and voltage ratings, equivalent breaking capacity, and compatible mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the A6T150 and JLLS150.X are active production components suitable for Class T fast-acting fuse applications. The JLLS150.X from Littelfuse carries ROHS3 compliance and holds multiple approval certifications (CE, CSA, UL), whereas the A6T150 is RoHS non-compliant. For applications requiring regulatory compliance with modern environmental standards, the JLLS150.X presents a compliant alternative. Both parts share identical electrical characteristics: 150A current rating, 200kA breaking capacity, and Class T fast-acting response. Selection between these parts should be based on compliance requirements, supply availability, and mechanical fit within the target application's bolt-mount fuse holder configuration.

Frequently Asked Questions (FAQ)

Q: What makes JLLS150.X a valid substitute for A6T150?

A: Both parts are Class T fast-acting fuses with 150A current rating and 200kA breaking capacity. They share identical electrical performance characteristics and cartridge bolt-mount configuration, making them functionally equivalent for applications requiring these specifications.

Q: Are there voltage rating differences between these parts?

A: The JLLS150.X is rated for 600 VAC and 300 VDC. Voltage ratings for the A6T150 are not specified in the available technical data. Verify the A6T150 voltage ratings against your application requirements before substitution.

Q: What is the difference between "Fast Acting" and "Fast Blow"?

A: In fuse terminology, "Fast Acting" and "Fast Blow" refer to the same response characteristic: rapid interruption of circuit current under fault conditions. Both terms describe Class T fuse behavior.

Q: Does RoHS compliance affect electrical performance?

A: RoHS compliance relates to material composition and environmental standards, not electrical performance. Both parts deliver equivalent electrical protection. The JLLS150.X's ROHS3 compliance makes it suitable for applications with regulatory requirements; the A6T150's non-compliance may restrict use in certain regulated industries.

Q: Can I use JLLS150.X in existing A6T150 fuse holders?

A: Both parts use bolt-mount cartridge configuration. Physical compatibility depends on the specific fuse holder dimensions. Verify that the JLLS150.X dimensions (1.063" Dia x 1.657" L) match your existing fuse holder specifications.

Q: What is the current inventory status?

A: A6T150 has 837 units in stock; JLLS150.X has 929 units in stock. Both parts are available for immediate procurement.