CHM3DN Equivalent & Substitute Parts

Part Overview

The CHM3DN is a 3-circuit cartridge fuse holder designed for DIN rail mounting, rated for 32 A at 690V with 10mm x 38mm (0.394" Dia x 1.496" L) fuse accommodation. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance and component replacement in existing installations.

Substiute Parts

CHM3DN

Eaton - Bussmann Electrical DivisionIn Stock: 747CHM3DN Datasheet

Current PartRFQ

CHM3DNU

Eaton - Bussmann Electrical DivisionIn Stock: 903CHM3DNU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CHM3DN is determined by the following critical parameters:

• Mounting compatibility: DIN rail mounting required
• Circuit configuration: 3-circuit design mandatory
• Fuse accommodation: 10mm x 38mm cartridge fuse size (5AG, 13/32" x 1-1/2" Midget standard)
• Termination interface: Screw terminal connection
• Voltage and current ratings: Must meet or exceed operational requirements

The CHM3DNU qualifies as a direct substitute based on identical mounting type, circuit count, fuse size, and termination style. Voltage and current rating differences are addressed in the parameter comparison below.

Parameter Comparison

Engineering Selection Recommendations

The CHM3DNU is an active product from the same manufacturer series and provides mechanical and electrical compatibility with the obsolete CHM3DN. The substitute maintains identical mounting, circuit configuration, fuse accommodation, and termination characteristics.

The CHM3DNU operates at reduced voltage (600V vs. 690V) and current (30A vs. 32A) ratings. Selection of this substitute is appropriate for applications where the system voltage and current requirements do not exceed 600V and 30A respectively. For installations requiring the full 690V/32A capability of the original CHM3DN, alternative sources or higher-rated substitutes from the same manufacturer series should be evaluated.

The CHM3DNU carries RoHS compliance certification, providing environmental and regulatory alignment with current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the CHM3DNU directly replace the CHM3DN in all applications?

A: Mechanical and electrical interface compatibility is confirmed. Substitution is valid only when system voltage does not exceed 600V and current demand does not exceed 30A. Applications requiring 690V/32A operation require alternative evaluation.

Q: What fuse types are compatible with both the CHM3DN and CHM3DNU?

A: Both holders accommodate 5AG cartridge fuses in the 10mm x 38mm (13/32" x 1-1/2" Midget) standard size.

Q: Are there differences in termination between these parts?

A: Both parts use screw terminal connections. No termination interface modifications are required for substitution.

Q: What is the significance of the CHM3DNU being RoHS compliant?

A: RoHS compliance indicates the substitute meets current environmental and material restriction standards. The original CHM3DN status on this criterion is not specified in available documentation.

Q: Why is the CHM3DN classified as obsolete?

A: Obsolescence typically reflects discontinuation by the manufacturer. The CHM3DNU, as an active product in the same series, represents the current equivalent offering.