Littelfuse 03453RF7H Equivalent & Substitute Parts

Part Overview

The Littelfuse 03453RF7H is a cartridge fuse holder rated for 20 A at 250V, designed for single-circuit panel mount applications. This component accommodates 3AG cartridge fuses measuring 0.25" diameter by 1.26" length (6.35mm x 32mm). The part is currently active in production and maintains ROHS3 compliance status. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and termination specifications align with the original design requirements.

Substiute Parts

03453RF7H

Littelfuse Inc.In Stock: 91903453RF7H Datasheet

Current PartRFQ

BK/HTB-68I

Eaton - Electronics DivisionIn Stock: 808BK/HTB-68I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 03453RF7H is determined by strict equivalence across the following 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 Type: Panel Mount (exact match required)
• Termination Style: Quick Connect - 0.250" (6.3mm) (exact match required)
• Compatible Fuse Standard: 3AG, 1/4" x 1-1/4" (SFE-20)

The Eaton BK/HTB-68I meets all electrical and mechanical substitution criteria for the 03453RF7H.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 03453RF7H and Eaton BK/HTB-68I are active production components with identical electrical and mechanical specifications. Selection between these parts should consider the following factors:

Regulatory Compliance: The Littelfuse 03453RF7H carries ROHS3 compliance certification. The Eaton BK/HTB-68I is RoHS non-compliant. Applications subject to RoHS3 requirements must use the Littelfuse part.

Moisture Sensitivity: The Littelfuse 03453RF7H lists Moisture Sensitivity Level as Not Applicable. The Eaton BK/HTB-68I is rated MSL 1 (Unlimited), indicating no moisture sensitivity constraints.

Availability: Both parts maintain active inventory status. Current stock levels should be verified at time of procurement.

REACH Compliance: The Littelfuse 03453RF7H is REACH Unaffected. REACH status for the Eaton part is not specified in available data.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/HTB-68I be used in applications requiring RoHS3 compliance?

A: No. The Eaton BK/HTB-68I is RoHS non-compliant. Only the Littelfuse 03453RF7H meets RoHS3 requirements.

Q: Are the fuse cartridge dimensions identical between these two parts?

A: Yes. Both parts accommodate 3AG cartridge fuses measuring 0.25" diameter by 1.26" length (6.35mm x 32mm). They are mechanically interchangeable in this respect.

Q: What is the difference in contact material specifications?

A: The Littelfuse 03453RF7H specifies Copper Alloy contacts with Tin finish. The Eaton BK/HTB-68I contact material and finish are not specified in available documentation.

Q: Do both parts use the same termination connector?

A: Yes. Both parts feature Quick Connect termination with 0.250" (6.3mm) connector specification.

Q: Are there any moisture sensitivity considerations for these fuse holders?

A: The Littelfuse 03453RF7H has no applicable moisture sensitivity rating. The Eaton BK/HTB-68I is rated MSL 1 (Unlimited), meaning it has no moisture sensitivity constraints during storage or handling.

Q: Can these parts be used interchangeably in existing designs?

A: Electrical and mechanical interchangeability is confirmed. However, regulatory compliance requirements must be evaluated. RoHS3-compliant applications must use the Littelfuse 03453RF7H.