A6D90R Equivalent & Substitute Parts

Part Overview

The A6D90R is a 600V 90A RK1 TD fuse manufactured by Mersen USA Newburyport-MA L.L.C. This cartridge fuse is designed for industrial electrical applications requiring time-delay protection at 90 amperes and 600 volts AC. The part maintains active product status with 1094 units currently in stock. Identifying equivalent substitute parts is necessary to ensure supply chain continuity, optimize procurement options, and maintain system compatibility when the primary part becomes unavailable.

Substiute Parts

A6D90R

Mersen USA Newburyport-MA L.L.C.In Stock: 1204A6D90R Datasheet

Current PartRFQ

LSRK090.VXID

LittelfuseIn Stock: 1177LSRK090.VXID Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A6D90R is determined by strict equivalence across the following critical parameters:

• Current Rating: 90A (exact match required)
• Voltage Rating - AC: 600V (exact match required)
• Fuse Class: RK1 (exact match required)
• Response Time: Time Delay (TD) or Slow Blow (exact match required)
• Mounting Type: Cartridge format with compatible holder requirements

The substitute part LSRK090.VXID from Littelfuse meets all mandatory electrical and mechanical parameters for direct substitution in applications currently using the A6D90R.

Parameter Comparison

Engineering Selection Recommendations

Both the A6D90R and LSRK090.VXID maintain active product status and are suitable for continued procurement. The LSRK090.VXID offers additional compliance advantages, including ROHS3 certification and multiple approval agencies (CE, CSA, QPL, UL). The A6D90R remains available with 1094 units in stock, while the LSRK090.VXID has 1118 units in stock, providing equivalent supply availability.

Selection between these parts should be based on existing system certifications, regulatory requirements, and holder compatibility. The RK1 class designation and 90A/600V electrical specifications are identical across both parts, ensuring functional equivalence in protected circuits.

Frequently Asked Questions (FAQ)

Q: Can LSRK090.VXID directly replace A6D90R in existing installations?

A: Yes. Both parts are RK1 class cartridge fuses rated for 90A at 600V AC with time-delay response characteristics. Direct substitution is electrically and mechanically compatible provided the fuse holder is designed for standard cartridge fuses of the specified dimensions.

Q: What is the significance of the RK1 class designation?

A: RK1 is a fuse class that defines specific electrical characteristics including current-limiting performance and breaking capacity. Both the A6D90R and LSRK090.VXID are RK1 classified, ensuring equivalent protection characteristics in industrial electrical circuits.

Q: Does the ROHS3 compliance of LSRK090.VXID affect compatibility?

A: No. ROHS3 compliance indicates the substitute part meets environmental and material restrictions but does not alter electrical or mechanical performance. This compliance may be required for certain applications or regulatory jurisdictions.

Q: Are there dimensional differences between these fuses?

A: The LSRK090.VXID is specified as 1.311" diameter by 7.874" length (33.30mm x 200.00mm). The A6D90R dimensions are not provided in available documentation. Verify holder compatibility before substitution.

Q: What is the difference between time-delay and slow-blow response?

A: Time-delay (TD) and slow-blow are equivalent designations for fuses that tolerate temporary inrush currents before opening. Both the A6D90R and LSRK090.VXID provide this protection characteristic, making them suitable for motor circuits and inductive loads.