NH1CG35 Equivalent & Substitute Parts

Part Overview

The NH1CG35 is a 35A square fuse rated for 500 VAC and 440 VDC operation, manufactured by Littelfuse Inc. This component is classified as obsolete and requires a holder for installation. The fuse features fast-blow response characteristics and is designed for motor protection applications with an indicating function. Due to its obsolete status, identifying equivalent substitute parts is necessary for system maintenance and component replacement in existing installations.

Substiute Parts

NH1CG35

Littelfuse Inc.In Stock: 973NH1CG35 Datasheet

Current PartRFQ

35NHG01B

Eaton - Bussmann Electrical DivisionIn Stock: 77635NHG01B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NH1CG35 is based on the following critical parameters that must remain consistent:

• Current Rating: 35A (exact match required)
• Voltage Rating - AC: 500 VAC (exact match required)
• Fuse Type: Square (exact match required)
• Class: NH (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Package / Case: Rectangular, Blade (exact match required)

The substitute part 35NHG01B meets these core electrical and mechanical requirements. The DC voltage rating differs (250 VDC vs. 440 VDC on the original), which represents a reduction in maximum DC voltage capability. This difference must be evaluated against the specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The 35NHG01B from Eaton - Bussmann Electrical Division is the identified substitute for the obsolete NH1CG35. This part maintains electrical equivalence in AC voltage rating (500 VAC) and current rating (35A), with identical fuse class (NH) and response characteristics (Fast Blow).

Key considerations for selection:

• The 35NHG01B is an active product with current manufacturing support, whereas the NH1CG35 is obsolete.
• The 35NHG01B is RoHS compliant, addressing environmental and regulatory requirements that the original part does not meet.
• The 35NHG01B carries both CE and VDE approvals, providing broader regulatory acceptance.
• DC voltage rating is reduced from 440 VDC to 250 VDC. This substitution is valid only for applications where the maximum DC voltage does not exceed 250 VDC.
• Physical dimensions differ slightly between the two parts, which may affect holder compatibility depending on holder design specifications.

Frequently Asked Questions (FAQ)

Q: Can the 35NHG01B directly replace the NH1CG35 in all applications?

A: The 35NHG01B is electrically equivalent for AC applications at 500 VAC and 35A. For DC applications, the maximum voltage is limited to 250 VDC with the substitute part. Verify that your application does not require DC operation above 250 VDC before substitution.

Q: What is the significance of the different physical dimensions between these parts?

A: The NH1CG35 measures 2.953" L x 2.220" W x 1.181" H, while the 35NHG01B measures 2.953" L x 1.181" W x 1.969" H. Both are rectangular blade packages designed for NH-class holders. Confirm that your specific holder accommodates the 35NHG01B dimensions before installation.

Q: Why is RoHS compliance important for this substitution?

A: The 35NHG01B is RoHS compliant, whereas the NH1CG35 is not. RoHS compliance is increasingly required for industrial equipment sold in regulated markets. The 35NHG01B meets these environmental standards while the original part does not.

Q: Are there any breaking capacity differences between these parts?

A: The NH1CG35 specifies 120kA AC and 25kA DC breaking capacity. The 35NHG01B specifies 120kA breaking capacity. Both parts meet the 120kA AC requirement. For DC applications, the 35NHG01B data provided does not specify DC breaking capacity separately.

Q: What approvals does each part carry?

A: The NH1CG35 carries VDE approval. The 35NHG01B carries both CE and VDE approvals, providing broader regulatory acceptance in European and international markets.