Littelfuse 0219.063MXAP Glass Cartridge Fuse 63mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0219.063MXAP is a slow-blow glass cartridge fuse rated at 63 mA, 250 V AC/DC with a 5mm x 20mm form factor. This component is designed for circuit protection in applications requiring time-delayed response to transient overcurrent conditions. The part is currently active in production and maintains full RoHS3 compliance. Substitute parts may be required due to inventory availability, regional certification requirements, or specific application compatibility needs.

Substiute Parts

0219.063MXAP

Littelfuse Inc.In Stock: 9580219.063MXAP Datasheet

Current PartRFQ

0218.063HXP

Littelfuse Inc.In Stock: 10580218.063HXP Datasheet

Parametric EquivalentRFQ

0218.063MXP

Littelfuse Inc.In Stock: 19930218.063MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0219.063MXAP is determined by the following critical parameters:

• Current Rating: 63 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Mounting Type: Requires Holder (exact match required)

The substitute parts 0218.063HXP and 0218.063MXP meet all critical electrical and mechanical parameters. Both are Littelfuse glass cartridge fuses with identical current, voltage, response time, and physical dimensions. Differences exist in breaking capacity and melting I²t values, which reflect design variations within the same functional category but do not affect basic substitutability for standard circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both 0218.063HXP and 0218.063MXP are valid substitutes for the 0219.063MXAP based on matching electrical ratings and physical form factor. All three parts are active products with RoHS3 compliance and identical operating temperature ranges.

The 0218.063HXP and 0218.063MXP differ from the main part in breaking capacity (35A versus 150A) and melting I²t characteristics (0.0117 versus 0.0285). These differences indicate design variations in fault current handling capability. Selection between the main part and substitutes should be based on the specific breaking capacity requirement of the application circuit.

The 0218.063HXP and 0218.063MXP carry expanded approval certifications (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE) compared to the 0219.063MXAP (CE, SEMKO, UL), which may be advantageous for applications requiring broader regional compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can 0218.063HXP or 0218.063MXP be used as direct replacements for 0219.063MXAP?

A: Yes, both parts are direct substitutes. They share identical current rating (63 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), and physical dimensions (5mm x 20mm). All three parts require a fuse holder for mounting.

Q: What is the difference between the main part and the substitute parts?

A: The primary differences are breaking capacity (0219.063MXAP: 150A; 0218.063HXP and 0218.063MXP: 35A) and melting I²t values (0.0285 versus 0.0117). These parameters affect how the fuse responds to high fault currents. The substitute parts also carry additional regional certifications.

Q: Are all three parts physically interchangeable?

A: Yes. All three parts have identical 5mm x 20mm dimensions and require the same holder type. Physical installation is identical.

Q: Do the substitute parts have the same operating temperature range?

A: Yes. All three parts operate across -55°C to 125°C.

Q: Which certifications apply to each part?

A: The 0219.063MXAP carries CE, SEMKO, and UL certifications. The 0218.063HXP and 0218.063MXP carry CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE certifications.

Q: Are there inventory considerations when selecting a substitute?

A: Current inventory levels are: 0219.063MXAP (912 pcs), 0218.063HXP (1045 pcs), and 0218.063MXP (1899 pcs). Availability may influence selection timing.