Littelfuse 0219.040MXAP Glass Cartridge Fuse 40mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0219.040MXAP is a 40 mA, 250 V AC/DC slow-blow glass cartridge fuse in a 5mm x 20mm form factor. This component is classified as Active product status and is designed for applications requiring circuit protection in low-current, standard voltage environments. The fuse requires a compatible holder for installation and is RoHS3 compliant with CE, SEMKO, and UL certifications. Substitute parts are identified when equivalent electrical parameters and mechanical dimensions are maintained across the product line, ensuring functional interchangeability within specified operating conditions.

Substiute Parts

0219.040MXAP

Littelfuse Inc.In Stock: 10060219.040MXAP Datasheet

Current PartRFQ

0218.040HXP

Littelfuse Inc.In Stock: 7600218.040HXP Datasheet

Parametric EquivalentRFQ

0218.040MXP

Littelfuse Inc.In Stock: 13310218.040MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0219.040MXAP are qualified based on the following critical parameters:

• Current Rating: 40 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Package Dimensions: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Configuration: Requires Holder (exact match required)

The substitute parts 0218.040HXP and 0218.040MXP meet all critical electrical and mechanical parameters. Both are manufactured by Littelfuse Inc., maintain identical current and voltage ratings, and share the same physical form factor. Differences in breaking capacity and melting I²t values do not preclude substitution when the application does not require the higher breaking capacity of the primary part.

Parameter Comparison

Engineering Selection Recommendations

All three parts—0219.040MXAP, 0218.040HXP, and 0218.040MXP—are Active product status and RoHS3 compliant. The 0219.040MXAP carries CE, SEMKO, and UL certifications. The substitute parts 0218.040HXP and 0218.040MXP carry expanded certification coverage including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE.

Selection between these parts depends on application-specific breaking capacity requirements. The 0219.040MXAP provides 150A breaking capacity, while 0218.040HXP and 0218.040MXP provide 35A breaking capacity. For applications where the circuit protection requirement does not exceed 35A breaking capacity, either substitute part is functionally equivalent. For applications requiring 150A breaking capacity, the primary part 0219.040MXAP is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can 0218.040HXP or 0218.040MXP be used in place of 0219.040MXAP?

A: Yes, provided the application does not require the higher 150A breaking capacity of the 0219.040MXAP. All three parts share identical current rating (40 mA), voltage rating (250 V AC), physical dimensions (5mm x 20mm), and response time (slow blow). Both substitute parts are Active status and RoHS3 compliant.

Q: What is the difference between 0218.040HXP and 0218.040MXP?

A: Both parts are electrically and mechanically identical. They share the same current rating, voltage rating, breaking capacity (35A), melting I²t (0.00536), and DC cold resistance (35.7 Ohms). Both are manufactured by Littelfuse Inc. in the 218 series and carry identical certifications.

Q: Do these fuses require a specific holder?

A: All three parts require a compatible 5mm x 20mm fuse holder for installation. The holder must be rated for 250 V AC and 40 mA minimum.

Q: Are there temperature operating differences between these parts?

A: No. All three parts operate across the same temperature range: -55°C to 125°C.

Q: What certifications apply to each part?

A: The 0219.040MXAP carries CE, SEMKO, and UL certifications. The 0218.040HXP and 0218.040MXP carry CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE certifications. Selection should be based on the specific regulatory requirements of the target application.