Littelfuse 810816 Fuse Holder Cartridge 250V 6.3A PCB — Equivalent & Substitute Parts

Part Overview

The Littelfuse 810816 is a single-circuit cartridge fuse holder rated for 250V at 6.3A, designed for through-hole PCB mounting with horizontal orientation. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The 3AG/5mm x 20mm cartridge format and PC pin termination define its core application scope.

Substiute Parts

810816

Littelfuse Inc.In Stock: 777810816 Datasheet

Current PartRFQ

BK/HBV-I-R

Eaton - Electronics DivisionIn Stock: 1382BK/HBV-I-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 810816 is determined by the following critical parameters:

• Voltage Rating: Must equal or exceed 250V
• Fuse Size Compatibility: Must accommodate 3AG/5mm x 20mm cartridge format
• Mounting Configuration: Through-hole PCB mounting with PC pin termination
• Number of Circuits: Single-circuit requirement
• Cartridge Type: Cartridge fuse holder format

The Eaton BK/HBV-I-R meets these core substitution criteria. While it supports a higher current rating of 16A (versus the original 6.3A), this represents a design margin increase rather than a functional incompatibility. Both components share identical voltage rating (250V), fuse size accommodation (3AG format), mounting type (through-hole), circuit count (1), and termination style (PC pin).

Parameter Comparison

Engineering Selection Recommendations

The Eaton BK/HBV-I-R is the designated manufacturer-recommended substitute for the obsolete Littelfuse 810816. Selection of this alternative is supported by:

• Product Status: The Eaton component maintains active production status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: The BK/HBV-I-R achieves ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements that the original component does not satisfy.
• Functional Equivalence: Identical voltage, fuse size, mounting configuration, and termination specifications ensure direct PCB compatibility without layout or schematic modifications.
• Current Margin: The 16A rating provides increased design margin relative to the original 6.3A specification, supporting system reliability without introducing incompatibility.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/HBV-I-R be used as a direct replacement for the Littelfuse 810816 without PCB modifications?

A: Yes. Both components share identical through-hole mounting footprints, PC pin termination, and 250V voltage rating. No PCB layout changes are required.

Q: Why does the substitute have a higher current rating (16A vs. 6.3A)?

A: The fuse holder current rating indicates the maximum current the holder can safely conduct. The actual circuit protection is determined by the fuse cartridge installed, not the holder rating. A 6.3A fuse cartridge can be installed in a 16A-rated holder without functional or safety impact.

Q: Are the fuse cartridges interchangeable between these two holders?

A: Yes. Both holders accommodate the same 3AG/5mm x 20mm cartridge format. Fuse cartridges rated for 250V and 6.3A are compatible with both holders.

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

A: The original Littelfuse 810816 is RoHS non-compliant, while the Eaton BK/HBV-I-R is ROHS3 compliant. For new designs or systems subject to environmental regulations, the Eaton component is the appropriate selection.

Q: Does the orientation difference (horizontal vs. vertical) affect compatibility?

A: Orientation refers to the physical mounting angle on the PCB. The Littelfuse 810816 is horizontal; the Eaton BK/HBV-I-R is vertical. PCB layout must accommodate the vertical mounting configuration of the substitute component.