NH00CM20 Equivalent & Substitute Parts

Part Overview

The NH00CM20 is a 20A 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

NH00CM20

Littelfuse Inc.In Stock: 1217NH00CM20 Datasheet

Current PartRFQ

170M1560D

Eaton - Bussmann Electrical DivisionIn Stock: 797170M1560D Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 170M1560D from Eaton - Bussmann Electrical Division qualifies as a substitute based on the following alignment of critical parameters:

• Current Rating: Both parts are rated at 20A
• Fuse Type: Both are square fuses with blade package configuration
• Mounting Type: Both require a holder for installation
• Indicating Feature: Both include indicating functionality
• Approval Standards: Both carry recognized industrial certifications (VDE for NH00CM20; CE, CSA, UR for 170M1560D)

The 170M1560D operates at a higher AC voltage rating of 690 VAC compared to the NH00CM20's 500 VAC specification. This higher voltage rating provides compatibility in applications where the original part was used at or below 500 VAC. The substitute part does not include a DC voltage rating specification, limiting its use to AC-only applications.

Parameter Comparison

Engineering Selection Recommendations

The 170M1560D is suitable for AC applications operating at or below 500 VAC where the NH00CM20 was originally specified. The substitute part's higher breaking capacity of 200kA AC exceeds the original part's 120kA AC rating, providing enhanced fault protection margins.

For applications requiring DC operation at 440 VDC, the 170M1560D is not applicable due to the absence of a DC voltage rating specification. In such cases, alternative substitutes with confirmed DC ratings must be evaluated.

The 170M1560D carries active product status and RoHS compliance, making it suitable for new designs and systems requiring environmental regulatory adherence. The original NH00CM20's obsolete status and RoHS non-compliance support transition to the 170M1560D for ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the 170M1560D replace the NH00CM20 in all applications?

A: The 170M1560D is suitable for AC applications only. Applications requiring DC operation at 440 VDC cannot use this substitute, as the 170M1560D does not specify a DC voltage rating.

Q: What is the significance of the higher breaking capacity in the 170M1560D?

A: The 170M1560D's 200kA AC breaking capacity exceeds the NH00CM20's 120kA AC rating. This higher capacity indicates the substitute can safely interrupt larger fault currents, providing equivalent or enhanced protection in the same current class.

Q: Are the physical dimensions compatible between these parts?

A: Both parts use rectangular blade package configuration and require a holder for mounting. However, dimensional differences exist: NH00CM20 measures 54.00mm L x 51.30mm W x 20.00mm H, while 170M1560D measures 53.00mm L x 20.50mm W x 52.00mm H. Verify holder compatibility before installation.

Q: What certifications apply to each part?

A: The NH00CM20 carries VDE approval. The 170M1560D carries CE, CSA, and UR certifications. Both meet recognized industrial standards for their respective markets.

Q: Is the 170M1560D suitable for new designs?

A: Yes. The 170M1560D holds active product status and RoHS compliance, making it appropriate for new equipment designs requiring current 20A protection at AC voltages up to 690 VAC.