NH00CM10 Square Fuse 10A 500VAC/440VDC Equivalent & Substitute Parts

Part Overview

The NH00CM10 is a square fuse rated for 10A at 500VAC/440VDC, designed for motor protection applications. Manufactured by Littelfuse, this component features fast-blow response characteristics and VDE approval. The part is currently obsolete, making identification of compatible substitutes essential for system maintenance and component replacement in existing installations.

Substiute Parts

NH00CM10

LittelfuseIn Stock: 993NH00CM10 Datasheet

Current PartRFQ

10NHG000B

Eaton - Bussmann Electrical DivisionIn Stock: 79610NHG000B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NH00CM10 is determined by the following critical parameters:

• Current Rating: Must be 10A
• Voltage Rating - AC: Must be 500VAC minimum
• Fuse Class: Must be NH
• Mounting Type: Must require holder with rectangular blade configuration
• Approval Agency: VDE certification required

The substitute part 10NHG000B meets the current rating, AC voltage, fuse class, mounting type, and VDE approval requirements. However, the DC voltage rating differs: the substitute is rated for 250VDC compared to the original 440VDC specification. This represents a reduction in DC voltage capability and must be evaluated against the specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The 10NHG000B from Eaton - Bussmann Electrical Division is the identified substitute for the obsolete NH00CM10. Both components share identical current ratings, AC voltage specifications, fuse class designation, and VDE approval status.

The primary consideration for selection is the DC voltage rating differential. The substitute operates at 250VDC maximum compared to the original 440VDC specification. Component selection must confirm that the application circuit operates within the 250VDC maximum rating of the substitute.

The 10NHG000B offers the advantage of active product status and ROHS3 compliance, supporting long-term availability and regulatory alignment for new installations or system upgrades.

Frequently Asked Questions (FAQ)

Q: Can the 10NHG000B directly replace the NH00CM10 in all applications?

A: Direct replacement is valid only when the circuit DC voltage does not exceed 250VDC. If the original application requires 440VDC DC capability, the 10NHG000B is not suitable. Verify the actual DC voltage present in the circuit before substitution.

Q: Are the physical dimensions compatible between these parts?

A: Both components are rectangular blade-type fuses requiring a holder. However, dimensional specifications differ: NH00CM10 measures 2.126" L x 2.020" W x 0.787" H, while 10NHG000B measures 2.126" L x 0.827" W x 1.693" H. Confirm holder compatibility before installation.

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

A: The NH00CM10 is RoHS non-compliant, while the 10NHG000B is ROHS3 compliant. For new system designs or installations subject to RoHS regulations, the 10NHG000B is the appropriate selection.

Q: Do both fuses have identical breaking capacity?

A: The NH00CM10 specifies 120kA AC and 25kA DC breaking capacity. The 10NHG000B specifies 120kA breaking capacity without separate DC rating documentation. Confirm breaking capacity requirements for the specific application circuit.

Q: Is the fast-blow response time maintained with the substitute?

A: The NH00CM10 explicitly specifies fast-blow response. The 10NHG000B response time is not documented in the provided specifications. Verify response time requirements with the component manufacturer if fast-blow characteristics are critical to the application.