CHM1DN Equivalent & Substitute Parts

Part Overview

The CHM1DN is a cartridge fuse holder manufactured by Eaton - Bussmann Electrical Division, designed for DIN rail mounting in 690V electrical systems. This component is rated for 32A continuous current and accommodates 5AG midget fuses (10mm x 38mm). The CHM1DN is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and component sourcing in legacy installations.

Substiute Parts

CHM1DN

Eaton - Bussmann Electrical DivisionIn Stock: 796CHM1DN Datasheet

Current PartRFQ

CHM1DNU

Eaton - Bussmann Electrical DivisionIn Stock: 787CHM1DNU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CHM1DN is determined by strict alignment of the following electrical and mechanical parameters:

• Voltage Rating: Must be 690V to ensure safe operation in the intended circuit
• Fuse Size and Type: Must accommodate 5AG cartridge fuses (10mm x 38mm) for mechanical compatibility
• Number of Circuits: Must be single-circuit configuration
• Mounting Type: Must be DIN rail to fit existing installation infrastructure
• Termination Style: Must use screw terminal for electrical connection compatibility
• Series Compatibility: Must be from the Eaton CH series for design consistency

The CHM1DNU meets all these criteria. While the current rating differs (30A versus 32A), both components share identical mechanical form factors, voltage ratings, fuse accommodation specifications, and mounting characteristics. The CHM1DNU is an active product from the same manufacturer and series, making it a direct functional equivalent for applications where the 30A rating is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The CHM1DNU is the direct substitute for the obsolete CHM1DN. Both components are manufactured by Eaton - Bussmann Electrical Division within the same CH series and share identical mechanical and electrical specifications with the exception of current rating (30A versus 32A).

Selection of the CHM1DNU is supported by:

• Product Status: The CHM1DNU is an active product, ensuring ongoing availability and supply chain reliability
• Compliance: The CHM1DNU is RoHS compliant, meeting current environmental and regulatory standards
• Mechanical Compatibility: Identical fuse size, mounting type, and termination style ensure direct installation compatibility
• Electrical Compatibility: Identical voltage rating (690V) and circuit configuration (1 circuit) maintain system integrity

The 2A reduction in current rating (from 32A to 30A) must be evaluated within the context of the specific application circuit. If the application circuit operates at or below 30A, the CHM1DNU provides a complete functional replacement. If the application requires operation above 30A, alternative solutions within the Eaton CH series should be consulted.

Frequently Asked Questions (FAQ)

Q: Can the CHM1DNU be directly installed in place of the CHM1DN?

A: Yes, the CHM1DNU is mechanically and electrically compatible with the CHM1DN. Both components use identical DIN rail mounting, screw terminal connections, and accommodate the same 5AG cartridge fuse size (10mm x 38mm). Installation requires no modifications to existing infrastructure.

Q: What is the significance of the current rating difference between CHM1DN (32A) and CHM1DNU (30A)?

A: The current rating indicates the maximum continuous current the fuse holder is designed to safely conduct. The CHM1DNU is rated for 30A, while the CHM1DN is rated for 32A. If your application circuit operates at or below 30A, the CHM1DNU is fully suitable. If your circuit requires operation above 30A, the lower rating of the CHM1DNU may not be appropriate.

Q: Why is the CHM1DN classified as obsolete?

A: Obsolete status indicates that the manufacturer has discontinued production and support for this component. The CHM1DNU represents the active product line continuation from Eaton - Bussmann Electrical Division, offering the same core functionality with current manufacturing standards and compliance certifications.

Q: Are there any compliance differences between the CHM1DN and CHM1DNU?

A: The CHM1DNU is RoHS compliant, meeting current environmental regulations for restricted substances. The CHM1DN's RoHS status is not specified in available documentation. For applications requiring RoHS compliance, the CHM1DNU is the appropriate selection.

Q: What fuse types are compatible with both the CHM1DN and CHM1DNU?

A: Both fuse holders accommodate 5AG cartridge fuses with dimensions of 10mm diameter x 38mm length (0.394" x 1.496"). This is the standard midget fuse size for these components.

Q: Can the CHM1DNU be used in 690V circuits?

A: Yes, the CHM1DNU is rated for 690V operation, matching the voltage specification of the CHM1DN. Both components are suitable for high-voltage industrial applications at this voltage level.