NH00CG80 Equivalent & Substitute Parts

Part Overview

The NH00CG80 is an 80A square fuse rated for 500 VAC and 440 VDC operation, manufactured by Littelfuse Inc. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support. The fast-blow response time and indicating feature make it suitable for motor protection applications. Due to its obsolete status, sourcing active alternatives is necessary for new designs and system maintenance.

Substiute Parts

NH00CG80

Littelfuse Inc.In Stock: 778NH00CG80 Datasheet

Current PartRFQ

170M1566D

Eaton - Bussmann Electrical DivisionIn Stock: 981170M1566D Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 170M1566D from Eaton - Bussmann Electrical Division qualifies as a substitute based on the following alignment of critical parameters:

Matching Parameters:

• Current Rating: 80A (identical)
• Fuse Type: Square (identical)
• Mounting Type: Requires Holder (identical)
• Package / Case: Rectangular, Blade (identical)
• Response Time: Fast-blow characteristic maintained
• Indicating Feature: Present in both designs

Voltage Consideration: The 170M1566D is rated for 690 VAC, which exceeds the NH00CG80's 500 VAC requirement. In AC applications, a higher voltage-rated fuse can be used in lower voltage circuits without functional compromise. The DC rating difference (170M1566D does not specify DC rating) requires application-specific evaluation for DC circuit use.

Status Advantage: The 170M1566D carries Active product status with RoHS compliance and broader international approvals (CE, CSA, UR), supporting long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The 170M1566D is suitable for AC applications operating at or below 500 VAC. Its higher voltage rating (690 VAC) and increased breaking capacity (200kA) provide margin in AC circuits. The active product status ensures ongoing availability and supply chain continuity.

For DC applications requiring the 440 VDC rating of the original NH00CG80, the absence of specified DC voltage rating on the 170M1566D necessitates consultation with Eaton technical documentation or direct manufacturer confirmation before implementation.

The RoHS compliance of the 170M1566D aligns with current regulatory requirements, whereas the NH00CG80's non-compliant status may restrict use in new designs subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can the 170M1566D directly replace the NH00CG80 in all applications?

A: The 170M1566D is suitable for AC applications. For DC circuits, the absence of a specified DC voltage rating on the 170M1566D requires verification against application requirements before substitution.

Q: Why is the voltage rating higher on the substitute part?

A: The 170M1566D's 690 VAC rating exceeds the NH00CG80's 500 VAC requirement. A fuse with a higher voltage rating can be used in lower voltage circuits without performance degradation in AC applications.

Q: Are the physical dimensions compatible?

A: Both parts use Rectangular, Blade package configuration and require a holder. Dimensional variations exist between the two parts; verify holder compatibility before installation.

Q: What is the significance of the RoHS compliance difference?

A: The 170M1566D is RoHS compliant, meeting current environmental and regulatory standards. The NH00CG80's non-compliant status may restrict its use in new designs or systems subject to RoHS directives.

Q: Does the higher breaking capacity of the 170M1566D affect circuit protection?

A: The 170M1566D's 200kA breaking capacity exceeds the NH00CG80's 120kA AC rating. Higher breaking capacity indicates enhanced fault current handling capability and does not compromise circuit protection at the specified 80A current rating.