NH00CM100 Equivalent & Substitute Parts

Part Overview

The NH00CM100 is a 100A square fuse rated for 500 VAC and 440 VDC operation, manufactured by Littelfuse Inc. and classified as NH type. This component is designed for motor protection applications and features fast-blow response with an indicating function. The part is currently listed as obsolete, making identification of compatible substitutes essential for system maintenance and component replacement in existing installations.

Substiute Parts

NH00CM100

Littelfuse Inc.In Stock: 997NH00CM100 Datasheet

Current PartRFQ

100NHG000B

Eaton - Bussmann Electrical DivisionIn Stock: 3155100NHG000B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 100NHG000B from Eaton - Bussmann Electrical Division qualifies as a direct substitute based on the following critical parameters:

• Current Rating: Both parts are rated at 100A
• Voltage Rating - AC: Both parts are rated at 500 VAC
• Fuse Type: Both are square fuses
• Class: Both are NH class
• Mounting Type: Both require a holder
• Package / Case: Both use rectangular blade configuration
• Approval Agency: Both carry VDE approval
• Breaking Capacity: Both provide 120kA AC breaking capacity

The primary difference is the DC voltage rating: the NH00CM100 is rated for 440 VDC, while the 100NHG000B 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The 100NHG000B is an active product with ROHS3 compliance, whereas the NH00CM100 is obsolete and RoHS non-compliant. For new designs or system upgrades, the 100NHG000B is the preferred choice due to its active product status and regulatory compliance.

For existing installations currently using the NH00CM100, substitution with the 100NHG000B is permissible provided that the application does not require DC voltage operation exceeding 250 VDC. The reduction in DC voltage rating from 440 VDC to 250 VDC must be confirmed as acceptable within the specific circuit design and operating environment.

Both parts maintain identical AC voltage ratings, current ratings, fuse class, and mechanical form factor, ensuring physical and electrical compatibility within NH-type fuse holder assemblies.

Frequently Asked Questions (FAQ)

Q: Can the 100NHG000B directly replace the NH00CM100 in all applications?

A: Physical and electrical compatibility is confirmed for AC operation at 500 VAC and 100A current rating. However, if the application operates at DC voltages exceeding 250 VDC, the 100NHG000B cannot be used. Verify the maximum DC voltage requirement of your circuit before substitution.

Q: What is the significance of the NH fuse class?

A: NH class designates a specific fuse form factor and performance standard recognized internationally. Both the NH00CM100 and 100NHG000B conform to this class, ensuring compatibility with standard NH fuse holders and maintaining consistent breaking capacity performance.

Q: Why does the 100NHG000B have a lower DC voltage rating?

A: The DC voltage rating reflects the maximum voltage at which the fuse can safely interrupt a circuit under fault conditions. The 100NHG000B is rated for 250 VDC maximum, while the NH00CM100 is rated for 440 VDC. This difference must be evaluated against your specific application requirements.

Q: Are there any compliance differences between these parts?

A: The NH00CM100 is RoHS non-compliant and obsolete. The 100NHG000B is ROHS3 compliant and currently in active production. For applications subject to RoHS regulations or requiring long-term component availability, the 100NHG000B is the appropriate choice.

Q: Do both fuses have the same physical dimensions?

A: Both fuses are square type with rectangular blade configuration and require a holder for mounting. However, the dimensional specifications differ: NH00CM100 measures 2.126" L x 2.020" W x 0.787" H, while 100NHG000B measures 2.126" L x 0.827" W x 1.693" H. Verify that your fuse holder accommodates the 100NHG000B dimensions before installation.