BK/HTB-48I Cartridge Fuse Holder Equivalent & Substitute Parts

Part Overview

The BK/HTB-48I is a cartridge fuse holder manufactured by Eaton - Electronics Division, rated for 20 A at 250V with panel mount configuration. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing procurement and system maintenance. The HTB series holder accommodates 3AG cartridge fuses (0.25" Dia x 1.26" L) with quick connect termination suitable for 0.250" (6.3mm) terminals.

Substiute Parts

BK/HTB-48I

Eaton - Electronics DivisionIn Stock: 1140BK/HTB-48I Datasheet

Current PartRFQ

BK/HTB-48I-R

Eaton - Electronics DivisionIn Stock: 737BK/HTB-48I-R Datasheet

DirectRFQ

BK1-HTJ-606I

Eaton - Electronics DivisionIn Stock: 1749BK1-HTJ-606I Datasheet

SimilarRFQ

03420828H

Littelfuse Inc.In Stock: 406103420828H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/HTB-48I is determined by the following critical parameters: current rating (20 A), voltage rating (250V), fuse size (0.25" Dia x 1.26" L), fuse type (cartridge), number of circuits (1), and mounting type (panel mount). Parts meeting all these electrical and mechanical specifications are classified as direct substitutes. Parts with differing current ratings or fuse dimensions are classified as similar alternatives with application-specific limitations.

Direct Substitutes (identical electrical and mechanical specifications):

• BK/HTB-48I-R (Eaton - Electronics Division)
• 03420828H (Littelfuse Inc.)

Similar Alternative (reduced current rating, different termination):

• BK1-HTJ-606I (Eaton - Electronics Division) — 10 A rating, solder lug termination

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical and Mechanical Specifications):

BK/HTB-48I-R is the primary direct substitute, manufactured by Eaton - Electronics Division with active product status and ROHS3 compliance. This part maintains identical current rating (20 A), voltage rating (250V), fuse size (0.25" Dia x 1.26" L), and quick connect termination. Selection of BK/HTB-48I-R eliminates obsolescence risk while preserving electrical and mechanical compatibility.

03420828H (Littelfuse Inc.) is an alternative direct substitute meeting all electrical and mechanical specifications with ROHS3 compliance and active product status. This part provides cross-manufacturer compatibility with identical current and voltage ratings, fuse dimensions, and termination style. Contact material (brass) and finish (nickel) are specified for this part.

For Current-Limited Applications:

BK1-HTJ-606I is a similar alternative suitable only for applications requiring 10 A maximum current rating. This part differs in current capacity (10 A versus 20 A) and termination style (solder lug versus quick connect). Selection of this part requires verification that circuit current requirements do not exceed 10 A and that solder lug termination is compatible with the installation.

Frequently Asked Questions (FAQ)

Q: Can BK/HTB-48I-R be used as a direct replacement for BK/HTB-48I?

A: Yes. BK/HTB-48I-R meets all electrical specifications (20 A, 250V), mechanical specifications (0.25" Dia x 1.26" L cartridge fuse size), and termination requirements (quick connect - 0.250"). The part is manufactured by the same supplier (Eaton) and maintains active product status with ROHS3 compliance.

Q: What is the difference between BK/HTB-48I-R and 03420828H?

A: Both parts are direct substitutes with identical electrical and mechanical specifications. The primary differences are manufacturer (Eaton versus Littelfuse Inc.) and specified contact material/finish (03420828H specifies brass with nickel finish). Both parts are ROHS3 compliant and active.

Q: Can BK1-HTJ-606I replace BK/HTB-48I in all applications?

A: No. BK1-HTJ-606I has a reduced current rating (10 A versus 20 A) and different termination style (solder lug versus quick connect). This part is suitable only for circuits with maximum current requirements of 10 A and where solder lug termination is compatible with the installation.

Q: What fuse types are compatible with these holders?

A: All listed parts accommodate 3AG cartridge fuses with dimensions 0.25" Dia x 1.26" L (6.35mm x 32mm), except BK1-HTJ-606I which accommodates 1/4" diameter cartridge fuses.

Q: Are there RoHS compliance considerations for part selection?

A: The original BK/HTB-48I is RoHS non-compliant. Both direct substitutes (BK/HTB-48I-R and 03420828H) are ROHS3 compliant. BK1-HTJ-606I is RoHS compliant. Selection of compliant alternatives is recommended for new designs and systems subject to RoHS requirements.

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

A: Quick connect termination (0.250" / 6.3mm) accommodates push-on connectors without soldering. Solder lug termination requires direct soldering to circuit board traces or wire connections. Installation method compatibility must be verified before part selection.