A2D45R Equivalent & Substitute Parts

Part Overview

The A2D45R is a 250V 45A RK1 TD fuse manufactured by Mersen USA Newburyport-MA L.L.C. This uncategorized fuse is actively produced and ROHS3 compliant. Finding equivalent substitute parts is necessary to ensure supply chain continuity, optimize inventory management, and maintain operational flexibility when the primary part becomes unavailable or when alternative sourcing is required for cost or logistics optimization.

Substiute Parts

A2D45R

Mersen USA Newburyport-MA L.L.C.In Stock: 763A2D45R Datasheet

Current PartRFQ

LNRK045.T

Littelfuse Inc.In Stock: 923LNRK045.T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The LNRK045.T from Littelfuse Inc. qualifies as a direct substitute for the A2D45R based on the following critical parameters:

• Current Rating: Both parts are rated for 45A
• Voltage Rating: Both parts support 250V AC operation
• Fuse Class: Both parts are RK1 class fuses
• Response Time: Both parts provide slow blow (time delay) protection
• Compliance: Both parts are ROHS3 compliant and actively produced
• Certifications: The LNRK045.T carries CE, CSA, QPL, and UL approvals

The LNRK045.T is a cartridge-type fuse that requires a holder for installation, consistent with standard RK1 fuse applications in electrical and industrial environments.

Parameter Comparison

Engineering Selection Recommendations

The LNRK045.T is a qualified substitute for the A2D45R based on matching electrical specifications and compliance requirements. Both parts are actively produced, ROHS3 compliant, and carry appropriate certifications for industrial and electrical applications. The LNRK045.T provides additional DC voltage rating (125 VDC) and documented breaking capacity specifications, which may offer enhanced performance characteristics in certain circuit configurations. Selection between these parts should be based on application-specific requirements, holder compatibility, and sourcing availability.

Frequently Asked Questions (FAQ)

Q: What makes the LNRK045.T a suitable substitute for the A2D45R?

A: Both parts share identical current ratings (45A), voltage ratings (250V AC), fuse class (RK1), and response time characteristics (slow blow/time delay). Both are ROHS3 compliant and actively produced, meeting the core electrical and regulatory requirements for direct substitution.

Q: Are there any differences in physical dimensions between these parts?

A: The LNRK045.T is specified as a cartridge fuse with dimensions of 0.811" diameter by 3.000" length. The A2D45R dimensional specifications are not provided in the available data. Verify holder compatibility before installation.

Q: Does the LNRK045.T require a specific holder?

A: Yes, the LNRK045.T is a cartridge-type fuse that requires a holder for installation. Ensure your application uses a compatible RK1 cartridge fuse holder.

Q: What is the difference between the 250V AC and 125V DC ratings on the LNRK045.T?

A: The LNRK045.T is rated for 250V AC and 125V DC operation. This dual-voltage capability allows use in both AC and DC circuits within the specified voltage limits. The A2D45R AC rating is 250V; DC rating is not specified.

Q: Are both parts suitable for industrial applications?

A: Yes, both parts are designed for electrical and industrial applications. The LNRK045.T carries CE, CSA, QPL, and UL certifications, confirming suitability for regulated industrial environments.

Q: What is the breaking capacity of these fuses?

A: The LNRK045.T has a breaking capacity of 200kA AC and 20kA DC at rated voltage. Breaking capacity specifications for the A2D45R are not provided in the available data.