CHM3DI Equivalent & Substitute Parts

Part Overview

The CHM3DI is a 3-circuit cartridge fuse holder designed for DIN rail mounting, rated for 32 A at 690V. This component is classified as obsolete, making identification of suitable alternatives essential for system maintenance and component replacement. The CHM3DI accommodates 5AG cartridge fuses (10mm x 38mm) with screw terminal connections, serving applications requiring high-voltage protection in industrial control systems.

Substiute Parts

CHM3DI

Eaton - Bussmann Electrical DivisionIn Stock: 874CHM3DI Datasheet

Current PartRFQ

CHM3DIU

Eaton - Bussmann Electrical DivisionIn Stock: 945CHM3DIU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CHM3DI is determined by the following critical parameters:

• Mounting configuration: DIN rail mounting requirement
• Circuit count: 3-circuit configuration
• Fuse compatibility: 5AG cartridge format (10mm x 38mm)
• Termination method: Screw terminal connection
• Voltage and current ratings: Operating specifications within acceptable ranges for the application

The CHM3DIU qualifies as a direct substitute based on identical mounting type, circuit count, fuse size, and termination style. Voltage and current ratings differ (600V/30A versus 690V/32A), representing a downrating that is acceptable for applications operating below the substitute's maximum specifications.

Parameter Comparison

Engineering Selection Recommendations

The CHM3DIU is an active product from the same manufacturer, providing continuity of supply for applications currently using the obsolete CHM3DI. The substitute maintains identical mechanical and electrical interface characteristics: DIN rail mounting, 3-circuit configuration, and 5AG cartridge fuse compatibility.

The CHM3DIU operates at reduced voltage (600V versus 690V) and current (30A versus 32A) ratings. Selection of this substitute is appropriate for applications where the system voltage and load current do not exceed 600V and 30A respectively. For applications requiring the full 690V/32A specification, alternative sources or higher-rated substitutes must be evaluated.

The CHM3DIU carries RoHS compliance certification, whereas the CHM3DI status is not specified. Both components share the same ECCN and HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can the CHM3DIU directly replace the CHM3DI in all applications?

A: The CHM3DIU is mechanically and electrically compatible with the CHM3DI for DIN rail mounting and 5AG cartridge fuse accommodation. However, the reduced voltage and current ratings (600V/30A versus 690V/32A) require verification that the application does not exceed these limits. If the system operates at 690V or requires 32A capacity, the CHM3DIU is not suitable.

Q: Are the fuse cartridges interchangeable between these two holders?

A: Yes. Both the CHM3DI and CHM3DIU accommodate 5AG cartridge fuses with dimensions of 10mm diameter by 38mm length. Fuse selection must match the specific current and voltage requirements of the application.

Q: What is the significance of the series designation change from CH to CHM?

A: The series designation change reflects product line evolution within the Eaton - Bussmann portfolio. The CHM series represents the current active product line, while the CH series is obsolete. Both series maintain compatible mechanical and electrical interfaces for this fuse holder category.

Q: Does the CHM3DIU require different installation procedures?

A: No. Both components use identical DIN rail mounting and screw terminal termination methods. Installation procedures remain unchanged.

Q: What compliance certifications apply to the CHM3DIU?

A: The CHM3DIU is RoHS compliant. Both the CHM3DI and CHM3DIU are classified under ECCN EAR99 and HTSUS 8538.90.8180.