Littelfuse 830/835 Cartridge Fuse Holder 6.3A 250V - Equivalent & Substitute Parts

Part Overview

The Littelfuse 830/835 is a through-hole cartridge fuse holder rated for 6.3 A at 250V, designed for single-circuit PCB applications with 5mm x 20mm fuse compatibility. This product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

830/835

Littelfuse Inc.In Stock: 1095830/835 Datasheet

Current PartRFQ

03450121H

Littelfuse Inc.In Stock: 237303450121H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 830/835 is determined by the following critical parameters:

• Fuse Size Compatibility: Both the main part and substitute must accept 5mm x 20mm cartridge fuses
• Mounting Configuration: Through-hole mounting with horizontal orientation and PC pin termination
• Circuit Count: Single-circuit design
• Electrical Ratings: Voltage and current ratings must meet or exceed the original specification to ensure safe operation in the target circuit

The Littelfuse 03450121H qualifies as a substitute based on matching fuse size, mounting type, orientation, termination style, and circuit count. The substitute provides enhanced electrical ratings (16 A at 600V versus 6.3 A at 250V), which are compatible with applications originally designed for the 830/835.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 03450121H is the manufacturer-recommended substitute for the obsolete 830/835. Selection of this alternative is supported by the following factors:

• Active Product Status: The 03450121H is currently in active production, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: The substitute meets ROHS3 compliance requirements, whereas the original part is non-compliant
• Electrical Compatibility: The higher current and voltage ratings of the substitute (16 A at 600V) provide margin above the original specification (6.3 A at 250V), making it suitable for applications originally designed for the 830/835
• Mechanical Compatibility: Identical fuse size, mounting configuration, and termination style ensure direct PCB integration without layout modifications
• Inventory Availability: The substitute is available in higher quantities (2300 pcs) compared to the original part (1036 pcs)

Frequently Asked Questions (FAQ)

Q: Can the 03450121H be used as a direct replacement for the 830/835 on existing PCBs?

A: Yes. Both parts share identical fuse size (5mm x 20mm), mounting type (through-hole), orientation (horizontal), termination style (PC pin), and circuit count (1). No PCB modifications are required for physical installation.

Q: What is the difference in electrical ratings between these parts?

A: The 830/835 is rated for 6.3 A at 250V. The 03450121H is rated for 16 A at 600V. The substitute provides higher electrical ratings, which are compatible with circuits designed for the original part.

Q: Does the contact material difference affect compatibility?

A: The 830/835 uses copper alloy contacts while the 03450121H uses brass contacts. Both are tin-finished and suitable for 5mm x 20mm cartridge fuse applications. Material selection does not affect functional compatibility in this application.

Q: Is the 03450121H RoHS compliant?

A: Yes. The 03450121H is ROHS3 compliant. The original 830/835 is not RoHS compliant. If regulatory compliance is required for your application, the substitute meets current environmental standards.

Q: Are there any packaging differences?

A: The 830/835 is packaged with a dash designation (specific packaging not detailed). The 03450121H is supplied in bulk packaging. Confirm packaging requirements with your procurement process.