A2D5R Equivalent & Substitute Parts

Part Overview

The A2D5R is a 250V 5A RK1 TD fuse manufactured by Mersen USA Newburyport-MA L.L.C. This cartridge fuse is designed for electrical and industrial applications requiring reliable overcurrent 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

A2D5R

Mersen USA Newburyport-MA L.L.C.In Stock: 843A2D5R Datasheet

Current PartRFQ

LNRK005.T

Littelfuse Inc.In Stock: 906LNRK005.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A2D5R is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 5A (exact match required)
• Voltage Rating - AC: 250VAC (exact match required)
• Fuse Class: RK1 (exact match required)
• Response Time: Time Delay / Slow Blow characteristic (exact match required)
• Packaging: Cartridge format with standard dimensions
• RoHS Compliance: ROHS3 Compliant status maintained

The LNRK005.T from Littelfuse Inc. meets all substitution criteria as a direct equivalent within the RK1 class cartridge fuse category.

Parameter Comparison

Engineering Selection Recommendations

Both the A2D5R and LNRK005.T maintain Active product status and ROHS3 compliance, ensuring regulatory alignment for current and future applications. The LNRK005.T provides additional technical documentation including breaking capacity ratings (200kA AC, 20kA DC) and precise dimensional specifications (0.563" Dia x 2.000" L), which support verification against circuit protection requirements. Selection between these parts should be based on supplier availability, lead time, and any application-specific approval agency requirements (the LNRK005.T carries CE, CSA, QPL, and UL certifications).

Frequently Asked Questions (FAQ)

Q: Can the LNRK005.T directly replace the A2D5R in existing designs?

A: Yes. Both parts are RK1 class, 5A, 250VAC cartridge fuses with time delay characteristics. They share identical electrical ratings and form factor requirements.

Q: What is the difference between Time Delay (TD) and Slow Blow response characteristics?

A: Time Delay and Slow Blow are equivalent designations for fuses that tolerate temporary inrush currents before opening. Both the A2D5R and LNRK005.T exhibit this characteristic.

Q: Does the LNRK005.T require a holder for installation?

A: Yes. The LNRK005.T is a cartridge fuse that requires a compatible fuse holder for mounting and electrical connection.

Q: Are there any voltage rating differences between these parts?

A: The A2D5R is rated for 250VAC. The LNRK005.T is rated for 250VAC and 125VDC, providing broader application flexibility while maintaining the required 250VAC rating.

Q: What certifications apply to the LNRK005.T?

A: The LNRK005.T carries CE, CSA, QPL, and UL approvals, supporting use in regulated industrial and electrical applications.