Littelfuse 830835 Fuse Holder Cartridge 250V 6.3A PCB

Part Overview

The Littelfuse 830835 is a single-circuit cartridge fuse holder rated for 6.3 A at 250V, designed for through-hole PCB mounting. This component accommodates 5mm x 20mm cartridge fuses and features copper alloy contacts with tin finish. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

830835

Littelfuse Inc.In Stock: 994830835 Datasheet

Current PartRFQ

03450121H

Littelfuse Inc.In Stock: 237303450121H Datasheet

MFR RecommendedRFQ

03450621H

Littelfuse Inc.In Stock: 238903450621H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 830835 is determined by compatibility across the following critical parameters:

• Fuse Size Compatibility: All substitutes must accommodate 5mm x 20mm cartridge fuses
• Number of Circuits: Single-circuit configuration required
• Fuse Type: Cartridge type only
• Mounting Interface: Through-hole or panel-mount configurations acceptable based on application requirements
• Termination Style: PC pin or quick-connect terminations available
• Voltage and Current Ratings: Substitutes must meet or exceed the original 250V / 6.3A specification

The two identified substitutes from Littelfuse Inc. (03450121H and 03450621H) share the same fuse size and circuit count but differ in mounting type, current rating, voltage rating, and termination style. Both are active products with current RoHS3 compliance, addressing the obsolescence of the original part.

Parameter Comparison

Engineering Selection Recommendations

03450121H is the primary substitute for PCB through-hole applications requiring direct mounting compatibility. This part maintains the same through-hole termination style and fuse size as the original 830835. The increased voltage rating (600V vs. 250V) and current rating (16A vs. 6.3A) provide enhanced performance margins. RoHS3 compliance addresses regulatory requirements absent in the obsolete original part.

03450621H is suitable for panel-mount applications where the quick-connect termination style is acceptable. This part also provides 600V / 20A ratings with RoHS3 compliance. Selection of this substitute requires confirmation that the panel-mount configuration and quick-connect termination are compatible with the target application.

Both substitutes are active products with established inventory availability, eliminating supply chain risk associated with the obsolete 830835.

Frequently Asked Questions (FAQ)

Q: Can 03450121H directly replace 830835 in existing PCB designs? A: Yes. Both parts share identical fuse size (5mm x 20mm), single-circuit configuration, through-hole mounting, and PC pin termination. The higher voltage and current ratings of 03450121H are backward-compatible with 250V / 6.3A applications.

Q: What is the key difference between 03450121H and 03450621H? A: The primary differences are mounting type and termination style. 03450121H uses through-hole PC pin termination suitable for PCB mounting. 03450621H uses panel-mount configuration with quick-connect 0.187" termination, requiring different mechanical integration.

Q: Are both substitutes RoHS compliant? A: Yes. Both 03450121H and 03450621H are RoHS3 compliant, addressing environmental and regulatory requirements not met by the obsolete 830835.

Q: Do the substitutes accept the same 5mm x 20mm fuse cartridges? A: Yes. All three parts (830835, 03450121H, and 03450621H) are designed for 5mm x 20mm cartridge fuses, ensuring fuse interchangeability.

Q: What is the contact material difference between the original and substitutes? A: The original 830835 uses copper alloy contacts, while both substitutes use brass contacts. Both materials are tin-finished and suitable for standard PCB applications.