NH00CG4 Equivalent & Substitute Parts

Part Overview

The NH00CG4 is a 4A 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 suitable substitute components necessary for ongoing system maintenance and repair operations.

Substiute Parts

NH00CG4

Littelfuse Inc.In Stock: 1018NH00CG4 Datasheet

Current PartRFQ

4NHG000B

Eaton - Bussmann Electrical DivisionIn Stock: 10334NHG000B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NH00CG4 is based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Current Rating: 4A (must match exactly)
• Voltage Rating - AC: 500 VAC (must match or exceed)
• Voltage Rating - DC: Must support the application requirement
• Response Time: Fast Blow (must match)
• Class: NH (must match)

Mechanical Compatibility Criteria:

• Fuse Type: Square
• Mounting Type: Requires Holder
• Package / Case: Rectangular, Blade
• Physical dimensions must be compatible with existing holder

The substitute part 4NHG000B meets the electrical requirements for current rating, AC voltage rating, response time, and class designation. The DC voltage rating differs (250 VDC vs. 440 VDC), which represents a reduction in DC voltage capability. Physical dimensions also differ, requiring verification of holder compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 4NHG000B from Eaton - Bussmann Electrical Division is an active product with current manufacturing support, whereas the NH00CG4 is obsolete. Both components share identical current ratings (4A), AC voltage ratings (500 VAC), response characteristics (Fast Blow), and NH class designation.

The primary technical difference is the DC voltage rating: the 4NHG000B is rated for 250 VDC compared to the NH00CG4's 440 VDC rating. This reduction in DC voltage capability must be evaluated against the actual system operating conditions. If the application operates exclusively at or below 250 VDC, the 4NHG000B provides a direct functional substitute with the advantage of RoHS compliance and active product status.

Physical dimensions differ between the two parts. The 4NHG000B has reduced width (30mm vs. 51.30mm) and increased height (50mm vs. 20mm). Compatibility with the existing fuse holder must be confirmed before implementation.

Frequently Asked Questions (FAQ)

Q: Can the 4NHG000B directly replace the NH00CG4 in all applications?

A: Direct replacement is possible only if the application operates at DC voltages not exceeding 250 VDC. The 4NHG000B's reduced DC voltage rating (250 VDC vs. 440 VDC) must be compatible with system requirements. Additionally, physical dimensions differ; holder compatibility must be verified.

Q: What are the key electrical parameters that must match for substitution?

A: Current rating (4A), AC voltage rating (500 VAC), response time (Fast Blow), and class designation (NH) must match. The DC voltage rating may differ if the application requirement permits.

Q: Does the 4NHG000B fit in holders designed for the NH00CG4?

A: Physical dimensions differ significantly. The NH00CG4 measures 54.00mm L x 51.30mm W x 20.00mm H, while the 4NHG000B measures 54.00mm L x 30.00mm W x 50.00mm H. Holder compatibility cannot be assumed and must be verified with the holder manufacturer or through physical testing.

Q: What is the advantage of using the 4NHG000B over the NH00CG4?

A: The 4NHG000B is an active product with current manufacturing support, whereas the NH00CG4 is obsolete. The 4NHG000B also carries RoHS compliance certification, whereas the NH00CG4 is RoHS non-compliant.

Q: Are both parts VDE approved?

A: Yes, both the NH00CG4 and 4NHG000B carry VDE approval certification.