CH221B Fuse Holder Cartridge 600V 100A DIN Rail

Part Overview

The CH221B is a cartridge fuse holder manufactured by Eaton - Bussmann Electrical Division, designed for single-circuit 600V applications with a 100A current rating. This component is mounted on DIN rail and accommodates 22mm x 58mm cartridge fuses with screw terminal connections.

The CH221B is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and new installations where this specification is required.

Substiute Parts

CH221B

Eaton - Bussmann Electrical DivisionIn Stock: 797CH221B Datasheet

Current PartRFQ

CH221DU

Eaton - Bussmann Electrical DivisionIn Stock: 738CH221DU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CH221B is determined by the following critical parameters that must remain constant or be compatible:

• Fuse Size: 22mm x 58mm cartridge format (mechanical compatibility)
• Current Rating: 100A (electrical load capacity)
• Mounting Type: DIN Rail (installation compatibility)
• Number of Circuits: 1 (functional requirement)
• Termination Style: Screw Terminal (connection compatibility)
• Voltage Rating: Equal to or greater than 600V (electrical safety)

The CH221DU meets all substitution criteria. While the CH221DU has a higher voltage rating of 700V compared to the CH221B's 600V, this represents an acceptable upgrade that maintains full backward compatibility. The 700V rating provides enhanced electrical safety margin without compromising any functional or mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

The CH221DU is the direct substitute for the CH221B. Both components are manufactured by Eaton - Bussmann Electrical Division within the same CH series and share identical mechanical and electrical specifications for fuse accommodation and circuit protection.

The CH221DU is classified as Active product status, ensuring ongoing availability and support. The CH221DU carries ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements. The higher 700V voltage rating of the CH221DU provides additional electrical safety margin compared to the 600V specification of the obsolete CH221B, making it suitable for direct replacement in 600V applications.

Frequently Asked Questions (FAQ)

Q: Can the CH221DU directly replace the CH221B in a 600V circuit?

A: Yes. The CH221DU is rated for 700V, which exceeds the 600V requirement of the original application. A higher voltage rating does not compromise functionality in lower-voltage circuits and provides additional safety margin.

Q: Are the physical dimensions identical between CH221B and CH221DU?

A: Yes. Both fuse holders accommodate 22mm x 58mm cartridge fuses and mount on DIN rail using identical mechanical interfaces.

Q: What is the difference in current handling capacity?

A: Both the CH221B and CH221DU are rated for 100A. Current handling capacity is identical.

Q: Does the CH221DU use the same termination method?

A: Yes. Both components use screw terminal connections for electrical termination.

Q: Why is the CH221B listed as obsolete?

A: The CH221B has been discontinued by the manufacturer. The CH221DU represents the active equivalent within the same product family and should be used for new designs and replacements.

Q: Are there any compliance differences between the two parts?

A: The CH221DU is ROHS3 compliant and REACH Unaffected, meeting current environmental standards. Compliance information for the CH221B was not specified in the available data.