BK/HTC-55M Equivalent & Substitute Parts

Part Overview

The BK/HTC-55M is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for panel mount applications with 250V rated voltage and 10A current capacity. This component accommodates 5mm x 20mm cartridge fuses in a single-circuit configuration with solder lug termination.

The BK/HTC-55M is classified as obsolete. Identification of equivalent and substitute parts is necessary to support ongoing maintenance, repair, and new design requirements where this component is specified or currently deployed.

Substiute Parts

BK/HTC-55M

Eaton - Electronics DivisionIn Stock: 991BK/HTC-55M Datasheet

Current PartRFQ

BK/HTB-34M-R

Eaton - Electronics DivisionIn Stock: 936BK/HTB-34M-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/HTC-55M is determined by the following critical parameters that must remain consistent or be compatible with the application:

Mandatory Compatibility Parameters:

• Fuse size: 5mm x 20mm cartridge format
• Voltage rating: 250V minimum
• Mounting type: Panel mount configuration
• Number of circuits: Single circuit
• Fuse holder type: Cartridge holder

Allowable Variation Parameters:

• Current rating: May increase from 10A to higher ratings (16A) provided the circuit design accommodates the higher current capacity
• Termination style: May transition from solder lug to quick connect provided PCB or wiring harness design is modified accordingly
• Product status: Active status preferred over obsolete for long-term supply assurance

The substitute part BK/HTB-34M-R maintains compatibility across all mandatory parameters while introducing a higher current rating (16A) and alternative termination style (Quick Connect - 0.187").

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Obsolete Component Retirement):

The BK/HTB-34M-R is the designated substitute for the BK/HTC-55M. Both components are manufactured by Eaton - Electronics Division and share identical mechanical and electrical specifications for fuse accommodation (5mm x 20mm cartridge format, 250V rating, single-circuit configuration, panel mount orientation).

Key Advantages of BK/HTB-34M-R:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance and REACH unaffected status meet current regulatory requirements
• Higher current rating (16A vs. 10A) provides design flexibility for applications requiring increased current capacity
• Identical fuse size and voltage rating maintain mechanical and electrical compatibility

Design Modification Requirement:

The transition from solder lug termination (BK/HTC-55M) to quick connect termination (BK/HTB-34M-R) requires modification of the PCB footprint or wiring harness connection method. This change is not a direct drop-in replacement without hardware modification.

Frequently Asked Questions (FAQ)

Q: Can the BK/HTB-34M-R be used as a direct replacement for the BK/HTC-55M without any modifications?

A: The BK/HTB-34M-R is electrically and mechanically compatible with the BK/HTC-55M for fuse accommodation and voltage rating. However, the termination style differs: the BK/HTC-55M uses solder lug termination while the BK/HTB-34M-R uses quick connect (0.187") termination. PCB or wiring harness modification is required.

Q: What is the significance of the higher current rating on the BK/HTB-34M-R (16A vs. 10A)?

A: The BK/HTB-34M-R is rated for 16A maximum current, compared to 10A for the BK/HTC-55M. This higher rating indicates the substitute part can accommodate circuits with higher current demands. The circuit design must be evaluated to confirm the 16A rating is appropriate for the application.

Q: Are there compliance differences between the BK/HTC-55M and BK/HTB-34M-R?

A: The BK/HTB-34M-R is certified as ROHS3 compliant and REACH unaffected. Compliance information for the BK/HTC-55M is not specified in the available data. For applications requiring regulatory compliance documentation, the BK/HTB-34M-R provides explicit certification.

Q: Why is the BK/HTC-55M classified as obsolete?

A: Obsolete status indicates the BK/HTC-55M is no longer in active production. The BK/HTB-34M-R, classified as active, represents the current product offering from Eaton - Electronics Division for this fuse holder category.

Q: What is the difference between solder lug and quick connect termination?

A: Solder lug termination (BK/HTC-55M) requires soldering the component leads directly to PCB pads or wiring. Quick connect termination (BK/HTB-34M-R) uses a 0.187" (4.7mm) spade connector that slides onto mating pins or terminals, eliminating the need for soldering.

Q: Can the BK/HTB-34M-R accommodate the same 5mm x 20mm fuses as the BK/HTC-55M?

A: Yes. Both the BK/HTC-55M and BK/HTB-34M-R are designed for 5mm x 20mm cartridge fuses. Fuse compatibility is maintained between the two parts.

Q: Is the BK/HTB-34M-R suitable for 250V applications?

A: Yes. The BK/HTB-34M-R is rated for 250V, matching the voltage specification of the BK/HTC-55M. Both parts are suitable for 250V circuit protection applications.