BK/HTB-44I Equivalent & Substitute Parts

Part Overview

The BK/HTB-44I is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for panel mount applications in 250V circuits with a 20A current rating. This single-circuit holder accommodates 0.25" diameter x 1.26" length cartridge fuses (6.35mm x 32mm) and features quick connect termination with 0.187" (4.7mm) terminals. The product is currently active in production with 756 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when alternative termination styles are required for specific installation requirements.

Substiute Parts

BK/HTB-44I

Eaton - Electronics DivisionIn Stock: 833BK/HTB-44I Datasheet

Current PartRFQ

BK1-HTJ-602I

Eaton - Electronics DivisionIn Stock: 1341BK1-HTJ-602I Datasheet

SimilarRFQ

03420004HXL

Littelfuse Inc.In Stock: 103703420004HXL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/HTB-44I are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Voltage Rating: 250V (all substitutes must match)
• Fuse Type: Cartridge (all substitutes must match)
• Mounting Type: Panel Mount (all substitutes must match)
• Number of Circuits: 1 (all substitutes must match)
• Fuseholder Type: Holder (all substitutes must match)

Secondary Consideration:

• Current Rating: The main part is rated 20A. Substitutes with lower current ratings (10A) are listed as similar alternatives but represent functional limitations in circuit protection capacity.
• Fuse Size: The main part accommodates 0.25" Dia x 1.26" L cartridges. Substitutes with matching or compatible fuse dimensions are included.
• Termination Style: The main part uses Quick Connect terminals. Substitutes with alternative termination styles (Solder Lug) are included for applications where different connection methods are acceptable.

Two substitute parts are identified: one from Eaton (BK1-HTJ-602I) with reduced current capacity, and one from Littelfuse Inc. (03420004HXL) with equivalent current rating and matching fuse specifications.

Parameter Comparison

Engineering Selection Recommendations

03420004HXL (Littelfuse Inc.) - Direct Equivalent:

The 03420004HXL is the primary direct substitute for the BK/HTB-44I. Both parts share identical electrical specifications: 20A current rating, 250V voltage rating, and 0.25" Dia x 1.26" L fuse size. The primary difference is termination style: the main part uses Quick Connect terminals while the substitute uses Solder Lug termination. The 03420004HXL is ROHS3 compliant and REACH unaffected, providing regulatory advantages over the non-compliant main part. This substitute is suitable for applications where solder lug connections are acceptable in the circuit design. Inventory availability is strong at 944 units.

BK1-HTJ-602I (Eaton - Electronics Division) - Similar Alternative:

The BK1-HTJ-602I is classified as a similar alternative due to reduced current capacity (10A versus 20A). This part maintains compatibility in voltage rating (250V), mounting type (panel mount), fuse type (cartridge), and circuit count (1). The fuse size specification lists 0.250" diameter without length specification. The BK1-HTJ-602I features solder lug termination and is RoHS compliant. This substitute is applicable only in circuits where the maximum required current does not exceed 10A. Inventory availability is highest at 1277 units.

Regulatory Compliance Consideration:

The main part BK/HTB-44I is RoHS non-compliant. Both substitutes offer improved compliance status: BK1-HTJ-602I is RoHS compliant, and 03420004HXL is ROHS3 compliant. For applications subject to RoHS requirements, either substitute provides regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the 03420004HXL replace the BK/HTB-44I in all applications?

A: The 03420004HXL is electrically and mechanically equivalent to the BK/HTB-44I for circuits requiring 20A at 250V with 0.25" Dia x 1.26" L cartridge fuses. The primary difference is termination style: the main part uses quick connect terminals while the substitute uses solder lug terminals. Substitution is valid only if the circuit design accommodates solder lug connections.

Q: Why is the BK1-HTJ-602I listed as a substitute if it has a lower current rating?

A: The BK1-HTJ-602I is listed as a similar alternative for applications where circuit current requirements do not exceed 10A. It maintains all other critical parameters: 250V voltage rating, panel mount configuration, single-circuit design, and cartridge fuse type. This part is suitable for lower-current protection circuits within the same voltage and form factor family.

Q: What are the key parameters that determine if a fuse holder can substitute for the BK/HTB-44I?

A: The critical parameters are: voltage rating (250V), fuse type (cartridge), mounting type (panel mount), number of circuits (1), and fuse size (0.25" diameter x 1.26" length). Current rating must be equal to or greater than 20A for direct equivalence. Termination style differences are acceptable if the circuit design permits alternative connection methods.

Q: Are there RoHS compliance differences between the main part and substitutes?

A: Yes. The BK/HTB-44I is RoHS non-compliant. The BK1-HTJ-602I is RoHS compliant, and the 03420004HXL is ROHS3 compliant. For applications subject to RoHS directives, either substitute provides regulatory compliance.

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

A: Quick connect termination uses 0.187" (4.7mm) spade terminals that insert into receptacles, enabling tool-free connection and disconnection. Solder lug termination requires permanent solder connections to circuit board traces or wire leads. Selection depends on circuit design requirements and installation methodology.

Q: Can the BK1-HTJ-602I be used in a 20A circuit?

A: No. The BK1-HTJ-602I is rated for maximum 10A continuous current. Using this part in a 20A circuit would exceed its current rating and compromise circuit protection integrity. The 03420004HXL must be used for 20A applications.

Q: What inventory levels are available for each part?

A: BK/HTB-44I: 756 units; BK1-HTJ-602I: 1277 units; 03420004HXL: 944 units. All parts are listed as new original stock.