NH00CM16 Equivalent & Substitute Parts

Part Overview

The NH00CM16 is a 16A square fuse rated for 500 VAC and 440 VDC operation, manufactured by Littelfuse Inc. and classified as NH type with fast-blow response characteristics. This component is designated as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and component procurement. The part features VDE approval and is designed for motor protection applications requiring holder-based mounting.

Substiute Parts

NH00CM16

Littelfuse Inc.In Stock: 1080NH00CM16 Datasheet

Current PartRFQ

16NHG000B

Eaton - Bussmann Electrical DivisionIn Stock: 87516NHG000B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 16NHG000B from Eaton - Bussmann Electrical Division qualifies as a direct substitute based on the following alignment of critical electrical and mechanical parameters:

• Current Rating: Both parts rated at 16A
• Voltage Rating - AC: Both rated at 500 VAC
• Fuse Type: Both are square fuses
• Class: Both classified as NH type
• Mounting Type: Both require holder-based installation
• Package / Case: Both use rectangular blade configuration
• Approval Agency: Both carry VDE approval
• Breaking Capacity: 16NHG000B rated at 120kA AC, meeting or exceeding the main part specification

The primary difference is the DC voltage rating: NH00CM16 is rated for 440 VDC while 16NHG000B is rated for 250 VDC. This represents a reduction in maximum DC voltage capability and must be evaluated against the actual operating conditions of the target application.

Parameter Comparison

Engineering Selection Recommendations

The 16NHG000B is suitable as a substitute for the NH00CM16 in applications where the DC voltage requirement does not exceed 250 VDC. The substitute part offers the advantage of active product status and RoHS compliance, supporting long-term availability and regulatory alignment.

Selection of the 16NHG000B requires confirmation that the application's maximum DC operating voltage remains at or below 250 VDC. If the system operates at DC voltages between 250 VDC and 440 VDC, the reduced voltage rating of the substitute part creates a functional limitation that must be addressed through alternative component sourcing or circuit redesign.

Both parts maintain identical current ratings, AC voltage ratings, fuse class designation, and mechanical mounting requirements, ensuring physical and electrical compatibility within the specified voltage envelope.

Frequently Asked Questions (FAQ)

Q: Can the 16NHG000B replace the NH00CM16 in all applications?

A: The 16NHG000B is electrically and mechanically compatible with the NH00CM16 for applications operating at 500 VAC and 16A. However, the substitute part's 250 VDC rating is lower than the original part's 440 VDC rating. Substitution is valid only when the application's maximum DC voltage does not exceed 250 VDC.

Q: What are the key parameters that determine substitutability?

A: Current rating (16A), AC voltage rating (500 VAC), fuse type (square), class designation (NH), and mounting configuration (holder-based) are the primary parameters ensuring functional equivalence. The DC voltage rating difference must be evaluated against actual operating conditions.

Q: Are there physical dimension differences between these parts?

A: Yes. The NH00CM16 measures 2.126" L x 2.020" W x 0.787" H (54.00mm x 51.30mm x 20.00mm), while the 16NHG000B measures 2.126" L x 0.827" W x 1.693" H (54.00mm x 21.00mm x 43.00mm). Both use rectangular blade packaging, but the dimensional variation may affect holder compatibility depending on the specific holder design.

Q: What is the significance of the product status difference?

A: The NH00CM16 is classified as obsolete, indicating discontinued manufacturing and limited future availability. The 16NHG000B maintains active product status, ensuring ongoing supply and support from the manufacturer.

Q: Does the RoHS compliance difference affect substitution?

A: The 16NHG000B is RoHS compliant while the NH00CM16 is not. For applications subject to RoHS regulations or customer requirements, the substitute part provides regulatory alignment. For legacy systems without RoHS mandates, this difference does not affect functional performance.