NH00CM32 Equivalent & Substitute Parts

Part Overview

The NH00CM32 is a 32A square fuse rated for 500 VAC and 440 VDC operation, manufactured by Littelfuse Inc. This component is designed for motor protection applications and features fast-blow response characteristics with an indicating function. The part is classified as obsolete, making identification of suitable substitute components necessary for ongoing system maintenance and new designs requiring equivalent protection specifications.

Substiute Parts

NH00CM32

Littelfuse Inc.In Stock: 883NH00CM32 Datasheet

Current PartRFQ

170M1562D

Eaton - Bussmann Electrical DivisionIn Stock: 889170M1562D Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 170M1562D from Eaton - Bussmann Electrical Division qualifies as a substitute based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Current Rating: 32A (identical)
• Fuse Type: Square (identical)
• Mounting Type: Requires Holder (identical)
• Package / Case: Rectangular, Blade (identical)
• Response Time: Fast-blow characteristic (functionally equivalent)
• Indicating Feature: Present (identical)

Voltage Consideration: The 170M1562D is rated for 690 VAC, which exceeds the NH00CM32's 500 VAC rating. In AC applications, a higher voltage-rated fuse of the same current class and breaking capacity can operate safely in lower-voltage circuits. The 170M1562D's 200kA breaking capacity at rated voltage exceeds the NH00CM32's 120kA AC specification, providing equivalent or superior protection margins.

DC Operation: The 170M1562D does not specify a DC voltage rating. The NH00CM32's 440 VDC rating is application-specific. Substitution for DC circuits requires confirmation that the substitute part is rated for the intended DC voltage.

Parameter Comparison

Engineering Selection Recommendations

The 170M1562D is suitable for AC applications at 500 VAC and below where the NH00CM32 was previously specified. The substitute part carries active product status and RoHS compliance, supporting long-term availability and regulatory alignment. The higher AC breaking capacity (200kA versus 120kA) provides equivalent or improved protection performance.

For DC applications requiring the 440 VDC rating of the original NH00CM32, the 170M1562D's unspecified DC voltage rating presents a limitation. Alternative substitutes with confirmed DC voltage ratings should be evaluated for such circuits.

Physical dimensions differ between the two parts. The NH00CM32 measures 54.00mm x 51.30mm x 20.00mm, while the 170M1562D measures 53.00mm x 20.50mm x 52.00mm. Holder compatibility must be confirmed before installation.

Frequently Asked Questions (FAQ)

Q: Can the 170M1562D replace the NH00CM32 in all applications?

A: The 170M1562D is suitable for AC applications at 500 VAC and below. For DC circuits operating at 440 VDC, the substitute part's DC voltage rating is not specified and must be confirmed with the manufacturer before use.

Q: Why is the 170M1562D's higher voltage rating (690 VAC) acceptable for a 500 VAC application?

A: In fuse selection, a component rated for higher voltage can safely operate in lower-voltage circuits of the same current class. The 170M1562D's 690 VAC rating ensures safe operation at 500 VAC and below.

Q: Do the physical dimensions affect substitution?

A: Yes. The NH00CM32 and 170M1562D have different dimensions. The original holder must be confirmed compatible with the substitute part's physical size before installation.

Q: What is the significance of the 170M1562D's higher breaking capacity?

A: The 170M1562D's 200kA breaking capacity exceeds the NH00CM32's 120kA AC specification. This provides equivalent or superior protection performance in fault conditions.

Q: Is the 170M1562D RoHS compliant?

A: Yes. The 170M1562D is RoHS compliant, whereas the NH00CM32 is non-compliant. This supports regulatory alignment for new designs and systems subject to RoHS requirements.

Q: What certifications does the 170M1562D carry?

A: The 170M1562D holds CE, CSA, and UR approvals, compared to the NH00CM32's VDE approval. These certifications support use in regulated industrial and electrical applications.