CH142B Equivalent & Substitute Parts

Part Overview

The CH142B is a cartridge fuse holder manufactured by Eaton - Bussmann Electrical Division, designed for 40 A, 600V applications with 2-circuit DIN rail mounting. This product is classified as obsolete, making identification of suitable substitute components essential for system maintenance and component replacement in existing installations.

The CH142B accommodates 14mm x 51mm cartridge fuses and features screw terminal connections, serving as a critical interface component in electrical distribution systems. Due to its obsolete status, sourcing direct replacements requires evaluation of compatible alternatives that maintain functional equivalence within allowable parameter tolerances.

Substiute Parts

CH142B

Eaton - Bussmann Electrical DivisionIn Stock: 660CH142B Datasheet

Current PartRFQ

CH142DU

Eaton - Bussmann Electrical DivisionIn Stock: 697CH142DU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CH142B is evaluated based on the following critical parameters that determine functional compatibility:

Mechanical Compatibility: Fuse size (14mm x 51mm), mounting type (DIN rail), and number of circuits (2) must remain constant to ensure physical fit and electrical interface integrity.

Electrical Compatibility: The substitute must accommodate the same fuse form factor and support the required circuit configuration. Voltage and current ratings of the substitute may exceed the original specification, provided the substitute is rated for the same or higher electrical parameters.

Termination Compatibility: Screw terminal connection style must be maintained for integration with existing wiring infrastructure.

The CH142DU qualifies as a direct substitute based on these criteria: it maintains identical mechanical form factor (14mm x 51mm cartridge, 2-circuit DIN rail configuration), identical termination style (screw terminal), and provides enhanced electrical ratings (50 A at 700V versus 40 A at 600V).

Parameter Comparison

Engineering Selection Recommendations

The CH142DU is the designated substitute for the obsolete CH142B. Selection is based on the following engineering criteria:

Product Status: The CH142B is obsolete, while the CH142DU maintains active product status with current manufacturing support and availability.

Regulatory Compliance: The CH142DU is RoHS compliant, meeting current environmental and regulatory requirements for electrical component procurement.

Electrical Upgrade Path: The CH142DU provides higher current (50 A) and voltage (700V) ratings compared to the CH142B (40 A, 600V). This represents an upgrade path suitable for applications where the original 40 A, 600V specification is required, as the substitute will operate within its derating envelope.

Mechanical and Electrical Interface: Both components share identical mechanical form factors, mounting configurations, and termination styles, ensuring direct physical and electrical compatibility within existing installations.

Frequently Asked Questions (FAQ)

Q: Can the CH142DU directly replace the CH142B in existing installations?

A: Yes. The CH142DU maintains identical mechanical dimensions (14mm x 51mm cartridge fuse accommodation), mounting type (DIN rail), circuit count (2), and termination style (screw terminal). The higher electrical ratings of the CH142DU do not prevent its use in applications originally specified for the CH142B.

Q: What is the significance of the higher current and voltage ratings on the CH142DU?

A: The CH142DU is rated for 50 A at 700V, compared to the CH142B at 40 A at 600V. These higher ratings indicate the substitute component has greater electrical capacity. In applications requiring 40 A at 600V, the CH142DU will operate well within its electrical envelope, providing equivalent or superior performance.

Q: Are there packaging differences between the CH142B and CH142DU?

A: The CH142B is specified with packaging designation "-" (not detailed), while the CH142DU is supplied in bulk packaging. Both components are functionally identical in form factor and mounting configuration.

Q: Does the RoHS compliance of the CH142DU affect compatibility?

A: No. RoHS compliance of the CH142DU indicates adherence to current environmental standards and does not affect electrical or mechanical compatibility with systems originally designed for the CH142B.

Q: What fuse types are compatible with both the CH142B and CH142DU?

A: Both components are designed for 14mm x 51mm cartridge fuses. Fuse selection should be based on the specific current and voltage requirements of the application, independent of the holder model.