Littelfuse 0229.800M Equivalent & Substitute Parts

Part Overview

The Littelfuse 0229.800M is an 800 mA, 250 V AC slow-blow glass cartridge fuse in 2AG package format (5mm x 15mm). This component is classified as obsolete, making identification of compatible substitutes essential for ongoing system maintenance and repair applications. The fuse requires a dedicated holder for installation and is designed for general-purpose circuit protection in AC applications.

Substiute Parts

0229.800M

Littelfuse Inc.In Stock: 11330229.800M Datasheet

Current PartRFQ

0229.800MXP

Littelfuse Inc.In Stock: 27860229.800MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0229.800MXP qualifies as a direct substitute based on the following critical parameters:

• Current Rating: Identical at 800 mA
• Voltage Rating - AC: Identical at 250 V
• Fuse Type: Identical cartridge glass construction
• Package / Case: Identical 2AG, 5mm x 15mm format
• Response Time: Identical slow-blow characteristic
• Mounting Type: Identical holder requirement
• Operating Temperature Range: Identical -55°C ~ 125°C

The 0229.800MXP provides enhanced specifications including DC voltage rating (125 V) and increased breaking capacity for DC applications (10kA DC), while maintaining full compatibility with the original part's AC specifications and physical form factor.

Parameter Comparison

Engineering Selection Recommendations

The 0229.800MXP is the appropriate substitute for the obsolete 0229.800M based on the following factors:

Product Status: The 0229.800MXP maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Compliance & Certifications: The 0229.800MXP holds CE, CSA, and UL approvals, with RoHS3 compliance and REACH unaffected status. The original 0229.800M carries CSA and UL approvals with RoHS non-compliant status. The substitute provides enhanced regulatory alignment for modern applications.

Electrical Compatibility: Both parts maintain identical AC specifications (800 mA, 250 V) and slow-blow response characteristics. The 0229.800MXP adds DC voltage capability (125 V) without compromising AC performance, making it suitable for applications requiring either AC-only or mixed AC/DC operation.

Physical Compatibility: Identical 2AG package dimensions and holder requirements ensure direct mechanical interchangeability without modification to existing installations.

Frequently Asked Questions (FAQ)

Q: Can the 0229.800MXP be used as a direct replacement for the 0229.800M in AC-only circuits?

A: Yes. The 0229.800MXP maintains identical AC voltage rating (250 V), current rating (800 mA), response time (slow-blow), and package format (2AG, 5mm x 15mm). No circuit modifications are required for AC applications.

Q: What is the significance of the DC voltage rating on the 0229.800MXP?

A: The 0229.800MXP includes a 125 V DC rating, enabling its use in DC or mixed AC/DC circuits. The original 0229.800M does not specify DC capability. This enhancement does not affect AC performance.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts use the 2AG package format with dimensions of 0.177" diameter x 0.570" length (4.50mm x 14.48mm). Both require a dedicated fuse holder for installation.

Q: What is the difference in breaking capacity between these parts?

A: The 0229.800M specifies 35A breaking capacity at rated voltage. The 0229.800MXP specifies 35A AC and 10kA DC breaking capacity, providing enhanced protection capability for DC applications while maintaining AC performance.

Q: Does the 0229.800MXP have better compliance status?

A: Yes. The 0229.800MXP is RoHS3 compliant with REACH unaffected status and holds CE certification in addition to CSA and UL approvals. The original part is RoHS non-compliant. For new designs or regulated applications, the 0229.800MXP is the preferred choice.

Q: Is there a difference in resistance between these parts?

A: The DC cold resistance values are nearly identical: 0.304 Ohms (0229.800M) versus 0.306 Ohms (0229.800MXP). This negligible difference has no practical impact on circuit performance.