A2D1R Equivalent & Substitute Parts

Part Overview

The A2D1R is a 250V 1A RK1 TD fuse manufactured by Mersen USA Newburyport-MA L.L.C. This cartridge fuse is designed for electrical and industrial applications requiring time-delay protection at 250VAC. The part maintains Active product status with ROHS3 compliance. Identifying equivalent substitute parts is necessary to ensure supply chain continuity, manage inventory across multiple suppliers, and maintain design flexibility in component sourcing.

Substiute Parts

A2D1R

Mersen USA Newburyport-MA L.L.C.In Stock: 1209A2D1R Datasheet

Current PartRFQ

LNRK001.T

Littelfuse Inc.In Stock: 1098LNRK001.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A2D1R is determined by strict alignment of electrical and mechanical parameters. The following criteria establish equivalency:

• Current Rating: 1A (exact match required)
• Voltage Rating - AC: 250VAC (exact match required)
• Fuse Class: RK1 (exact match required)
• Response Time: Time Delay / Slow Blow (exact match required)
• RoHS Compliance: ROHS3 Compliant (minimum requirement)
• Product Status: Active (ensures ongoing availability and support)

The LNRK001.T from Littelfuse Inc. satisfies all substitution criteria through identical electrical ratings and fuse classification.

Parameter Comparison

Engineering Selection Recommendations

Both the A2D1R and LNRK001.T maintain Active product status, ensuring continued availability and manufacturer support. Both components are ROHS3 compliant, meeting environmental regulatory requirements. The LNRK001.T carries multiple approval certifications (CE, CSA, QPL, UL), providing additional validation for regulated applications. Selection between these parts should be based on supply availability, lead time requirements, and existing qualification documentation within your design or procurement system.

Frequently Asked Questions (FAQ)

Q: Can LNRK001.T be used as a direct replacement for A2D1R? A: Yes. Both parts share identical current rating (1A), AC voltage rating (250VAC), fuse class (RK1), and response time characteristics (time delay / slow blow). Both are ROHS3 compliant and maintain Active product status.

Q: What is the significance of RK1 fuse class? A: RK1 is a fuse classification that defines specific electrical and mechanical characteristics, including current-limiting performance and breaking capacity. RK1 fuses are designed for industrial and commercial electrical protection applications.

Q: Does the LNRK001.T require a specific holder? A: Yes. The LNRK001.T is a cartridge fuse that requires a holder for installation. Verify that your existing fuse holder is compatible with the 0.563" diameter x 2.000" length cartridge specification.

Q: Are there differences in DC voltage ratings between these parts? A: The A2D1R DC voltage rating is not specified in available documentation. The LNRK001.T is rated for 125VDC. If DC operation is required, verify the A2D1R's DC rating against your application requirements before substitution.

Q: What certifications apply to the LNRK001.T? A: The LNRK001.T carries CE, CSA, QPL, and UL approvals. Confirm that these certifications meet your application's regulatory requirements.