A6T175 Equivalent & Substitute Parts

Part Overview

The A6T175 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 897 pieces available in new original stock. The part is RoHS non-compliant and carries a breaking capacity of 200kA at rated voltage. Identifying equivalent substitute parts is necessary to ensure supply chain continuity, optimize inventory management, and maintain compatibility across electrical systems where this fuse type is specified.

Substiute Parts

A6T175

Mersen USA Newburyport-MA L.L.C.In Stock: 913A6T175 Datasheet

Current PartRFQ

JLLS175.X

Littelfuse Inc.In Stock: 1117JLLS175.X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A6T175 is determined by the following critical parameters:

• Fuse Class: Must be Class T to ensure proper time-current characteristics and protection coordination
• Current Rating: Must be 175A to match the protected circuit requirements
• Response Time: Must be Fast Acting to maintain the intended protection profile
• Breaking Capacity: Must be rated at or above 200kA to safely interrupt fault currents
• Voltage Rating: Must support the system voltage requirements (AC and DC ratings where applicable)
• Mounting Type: Must be compatible with the installation method (bolt mount, cartridge configuration)

The JLLS175.X from Littelfuse Inc. meets these substitution criteria and is classified as an equivalent part for the A6T175.

Parameter Comparison

Engineering Selection Recommendations

Both the A6T175 and JLLS175.X are active production components suitable for Class T fast-acting fuse applications at 175A with 200kA breaking capacity. The JLLS175.X offers additional compliance advantages, including ROHS3 compliance and multi-agency approvals (CE, CSA, UL), whereas the A6T175 is RoHS non-compliant. Selection between these parts should be based on system compliance requirements and regulatory mandates applicable to the installation. The JLLS175.X provides documented voltage ratings (600 VAC / 300 VDC) and physical dimensions, supporting direct specification in design documentation. Both parts maintain equivalent electrical protection characteristics for the specified 175A circuit protection requirement.

Frequently Asked Questions (FAQ)

Q: What makes JLLS175.X a valid substitute for A6T175?

A: Both parts share identical Class T fuse classification, 175A current rating, fast-acting response time, and 200kA breaking capacity. These parameters define the electrical protection function and are the primary criteria for substitution eligibility.

Q: Are there voltage rating differences between these parts?

A: The JLLS175.X specifies 600 VAC and 300 VDC ratings. The A6T175 voltage ratings are not provided in the available documentation. Verify system voltage requirements against the JLLS175.X ratings before substitution.

Q: Does RoHS compliance affect substitution?

A: The A6T175 is RoHS non-compliant while JLLS175.X is ROHS3 compliant. Substitution may be required in applications subject to RoHS regulations. Confirm regulatory requirements for your installation before selecting either part.

Q: Are the physical dimensions compatible?

A: The JLLS175.X is specified as 1.063" Dia x 1.657" L (27.00mm x 42.10mm) in cylindrical cartridge configuration with bolt mount terminals. Verify mounting compatibility with your equipment before installation.

Q: What certifications apply to these parts?

A: The JLLS175.X carries CE, CSA, and UL approvals. Certification information for the A6T175 is not provided. Confirm certification requirements for your application and geographic region.