CH221BN Equivalent & Substitute Parts

Part Overview

The CH221BN is a cartridge fuse holder manufactured by Eaton - Bussmann Electrical Division, designed for DIN rail mounting in single-circuit applications. This component is rated for 100 A at 600V and accommodates 22mm x 58mm cartridge fuses. The CH221BN is currently classified as obsolete, making identification of suitable substitute components essential for system maintenance and component procurement.

Substiute Parts

CH221BN

Eaton - Bussmann Electrical DivisionIn Stock: 709CH221BN Datasheet

Current PartRFQ

CH221DNU

Eaton - Bussmann Electrical DivisionIn Stock: 1122CH221DNU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The CH221DNU qualifies as a substitute based on the following allowed electrical and mechanical parameters:

• Current Rating: Both parts are rated for 100 A
• Fuse Size: Both accommodate 22mm x 58mm cartridge fuses
• Fuse Type: Both are cartridge fuse holders
• Mounting Type: Both mount on DIN rail
• Termination Style: Both use screw terminals
• Series: Both belong to the CH series from Eaton - Bussmann Electrical Division

The CH221DNU differs in voltage rating (700V versus 600V) and circuit configuration (2 circuits versus 1 circuit). These differences represent enhanced electrical capability and expanded functionality, making the CH221DNU suitable for applications where the original CH221BN is no longer available.

Parameter Comparison

Engineering Selection Recommendations

The CH221DNU is an active product from the same manufacturer and series, providing continuity of supply for applications currently using the obsolete CH221BN. The substitute maintains identical current rating, fuse accommodation, mounting configuration, and termination method. The CH221DNU offers enhanced voltage capability (700V versus 600V) and dual-circuit functionality, positioning it as a forward-compatible alternative. The CH221DNU is RoHS compliant, meeting current environmental and regulatory standards for electrical components.

Frequently Asked Questions (FAQ)

Q: Can the CH221DNU directly replace the CH221BN in existing installations?

A: The CH221DNU maintains the same current rating (100 A), fuse size (22mm x 58mm), mounting type (DIN rail), and termination style (screw terminal) as the CH221BN. The higher voltage rating (700V) and additional circuit (2 versus 1) do not prevent substitution in applications designed for the original 600V, single-circuit configuration.

Q: What is the significance of the voltage rating difference between these parts?

A: The CH221BN is rated for 600V, while the CH221DNU is rated for 700V. The higher voltage rating of the substitute indicates enhanced electrical isolation and safety margins. This difference does not create incompatibility in applications operating at or below 600V.

Q: How does the circuit count difference affect substitution?

A: The CH221BN is a single-circuit holder, while the CH221DNU is a dual-circuit holder with neutral capability. In applications requiring only single-circuit protection, the additional circuit in the CH221DNU remains unused but does not compromise functionality.

Q: Are there packaging or inventory considerations for the CH221DNU?

A: The CH221DNU is supplied in bulk packaging and is currently in active production with 1017 pieces in stock, ensuring availability for procurement and replacement applications.

Q: What compliance standards apply to the CH221DNU?

A: The CH221DNU is RoHS compliant, meeting current environmental regulations for electrical and electronic equipment. Both parts carry ECCN classification EAR99.