BK/HTB-44I-SP Equivalent & Substitute Parts

Part Overview

The BK/HTB-44I-SP is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for panel mount applications. This component is rated for 20 A at 250V and accommodates 3AG cartridge fuses with dimensions of 0.25" Dia x 1.26" L (6.35mm x 32mm). The product maintains Active status in the market. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or application-specific requirements.

Substiute Parts

BK/HTB-44I-SP

Eaton - Electronics DivisionIn Stock: 708BK/HTB-44I-SP Datasheet

Current PartRFQ

03420004HXPL

Littelfuse Inc.In Stock: 96903420004HXPL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/HTB-44I-SP is determined by strict equivalence across the following critical parameters:

• Current Rating: 20 A (exact match required)
• Voltage Rating: 250V (exact match required)
• Fuse Size: 0.25" Dia x 1.26" L (6.35mm x 32mm) (exact match required)
• Fuse Type: Cartridge (exact match required)
• Number of Circuits: 1 (exact match required)
• Mounting Configuration: Panel Mount (exact match required)
• Compatible Fuse Standard: 3AG, 1/4" x 1-1/4" (SFE-20) (exact match required)

The substitute part 03420004HXPL from Littelfuse Inc. meets all mandatory electrical and mechanical parameters, confirming functional interchangeability in applications requiring a 20 A, 250V single-circuit cartridge fuse holder with panel mount configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the BK/HTB-44I-SP and 03420004HXPL satisfy the core electrical and mechanical requirements for 20 A, 250V single-circuit cartridge fuse holder applications with panel mount configuration.

BK/HTB-44I-SP (Eaton): Suitable for applications where Quick Connect termination (0.187" / 4.7mm) is specified. RoHS non-compliant status applies to legacy or non-regulated applications. Current inventory of 697 units supports immediate availability.

03420004HXPL (Littelfuse): Suitable for applications requiring Solder Lug termination. ROHS3 compliance addresses regulatory requirements in restricted substance applications. Higher inventory level of 894 units provides extended supply assurance. Contact material specification (Brass) and tin finish are documented.

Selection between these parts depends on termination style requirements and regulatory compliance mandates specific to the end application.

Frequently Asked Questions (FAQ)

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

A: Electrical and mechanical compatibility is confirmed across all critical parameters (20 A, 250V, cartridge fuse type, 3AG standard, panel mount). However, termination style differs: BK/HTB-44I-SP uses Quick Connect terminals while 03420004HXPL uses Solder Lug. Circuit board layout and connection methodology must accommodate the selected termination style.

Q: What is the significance of the RoHS compliance difference?

A: The BK/HTB-44I-SP is RoHS non-compliant, while 03420004HXPL is ROHS3 compliant. Selection depends on regulatory requirements applicable to the end product. Applications subject to RoHS directives require the compliant substitute.

Q: Are both parts rated for the same fuse cartridge dimensions?

A: Yes. Both parts accommodate 3AG cartridge fuses with dimensions 0.25" Dia x 1.26" L (6.35mm x 32mm). Fuse interchangeability is confirmed.

Q: What termination considerations apply when selecting between these parts?

A: The BK/HTB-44I-SP termination style is Quick Connect - 0.187" (4.7mm), designed for push-on connections. The 03420004HXPL termination style is Solder Lug, requiring soldered connections to the circuit board. Installation method and PCB design must align with the selected termination type.

Q: Is inventory availability a factor in part selection?

A: Both parts are in stock with Active product status. The 03420004HXPL maintains higher inventory (894 units) compared to BK/HTB-44I-SP (697 units), which may influence lead time considerations for high-volume requirements.