Littelfuse 0219.800MXA Equivalent & Substitute Parts

Part Overview

The Littelfuse 0219.800MXA is an 800 mA, 250 V AC/DC glass cartridge fuse with 5mm x 20mm dimensions and slow-blow response characteristics. This part is classified as obsolete, requiring identification of active equivalent alternatives for continued system support and procurement. The 219XA series design provides 150A breaking capacity at rated voltage with thermal characteristics suitable for circuit protection applications requiring slow-blow response.

Key Parameters

Parameter	Value
Current Rating	800 mA
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Glass
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	150A
Melting I²t	9.35
Operating Temperature Range	-55°C to 125°C
DC Cold Resistance	0.1635 Ohms

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Current Rating: 800 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Response Time: Slow Blow (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Mounting Type: Requires Holder (exact match required)

Substitute parts are grouped into two categories based on breaking capacity and thermal characteristics:

Category A - High Breaking Capacity (150A): Parts maintaining the original 219XA series breaking capacity specification. These provide direct functional equivalence with identical thermal response.

Category B - Standard Breaking Capacity (35A): Parts from 213 and 218 series with reduced breaking capacity but identical electrical and thermal operating characteristics. These are suitable for applications where the 150A breaking capacity is not a system requirement.

Parameter Comparison

Part Number	Series	Current (mA)	Voltage (V AC)	Response	Package	Breaking Capacity (A)	Melting I²t	DC Resistance (Ω)	Product Status	RoHS Status
0219.800MXA	219XA	800	250	Slow Blow	5x20mm	150	9.35	0.1635	Obsolete	Non-compliant
0219.800MXAP	219XA	800	250	Slow Blow	5x20mm	150	9.35	0.1635	Active	ROHS3 Compliant
0219.800MXABP	219XA	800	250	Slow Blow	5x20mm	150	9.35	0.1635	Active	ROHS3 Compliant
0213.800MXBP	213	800	250	Slow Blow	5x20mm	35	9.42	0.1635	Active	ROHS3 Compliant
0213.800MXP	213	800	250	Slow Blow	5x20mm	35	9.42	0.1635	Active	ROHS3 Compliant
0213.800TXP	213	800	250	Slow Blow	5x20mm	35	9.42	0.1635	Active	ROHS3 Compliant
0218.800HXP	218	800	250	Slow Blow	5x20mm	35	3.37	0.0813	Active	ROHS3 Compliant
0218.800MXBP	218	800	250	Slow Blow	5x20mm	35	3.37	0.0813	Active	ROHS3 Compliant
0218.800MXP	218	800	250	Slow Blow	5x20mm	35	3.37	0.0813	Active	ROHS3 Compliant
0218.800TXP	218	800	250	Slow Blow	5x20mm	35	3.37	0.0813	Active	ROHS3 Compliant
0218.800VXP	218	800	250	Slow Blow	5x20mm	35	3.37	0.0813	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Category A - Direct Equivalence):

0219.800MXAP and 0219.800MXABP are active production equivalents within the 219XA series, maintaining identical electrical specifications, breaking capacity, and thermal characteristics. Both parts carry ROHS3 compliance and full regulatory approvals (CCC, CE, CSA, SEMKO, UL, VDE). Selection between these two depends on packaging requirements: 0219.800MXAP is supplied in bulk packaging, while 0219.800MXABP is available in bulk with alternative packaging designation.

Secondary Substitutes (Category B - Parametric Equivalence):

The 213 series (0213.800MXBP, 0213.800MXP, 0213.800TXP) and 218 series (0218.800HXP, 0218.800MXBP, 0218.800MXP, 0218.800TXP, 0218.800VXP) provide electrical and thermal equivalence with reduced breaking capacity (35A versus 150A). These parts are suitable for applications where system fault current does not exceed 35A at rated voltage. The 218 series exhibits lower melting I²t (3.37 versus 9.35) and reduced DC cold resistance (0.0813 Ohms versus 0.1635 Ohms), indicating faster thermal response characteristics.

All substitute parts carry ROHS3 compliance and maintain the required regulatory certifications for the application domain.

Frequently Asked Questions (FAQ)

Q: Can 0213 or 0218 series parts replace the 0219.800MXA in all applications?

A: Substitution is valid only when system fault current does not exceed 35A. The 0219.800MXA and its 219XA series equivalents are rated for 150A breaking capacity. If your circuit protection design requires 150A breaking capacity, use only 0219.800MXAP or 0219.800MXABP.

Q: What is the difference between 0218.800MXP and 0218.800HXP?

A: Both parts are electrically identical (800 mA, 250 V AC, slow-blow, 5x20mm). The designation suffix indicates different approval agency combinations. Selection depends on required regulatory certifications for your application region.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance. The original 0219.800MXA is RoHS non-compliant, which is one reason for transition to active equivalents.

Q: What does "Requires Holder" mean for mounting type?

A: These are cartridge fuses that must be installed in a dedicated fuse holder. They are not surface-mount or panel-mount components. Ensure your circuit design includes appropriate 5x20mm fuse holder hardware.

Q: Why do 218 series parts have lower melting I²t values?

A: Lower melting I²t (3.37 versus 9.35) indicates faster thermal response to overcurrent conditions. The 218 series provides quicker fault interruption. Select based on your circuit's thermal time constant requirements.

Q: Can I mix different series parts in the same circuit?

A: All listed parts maintain identical current rating (800 mA), voltage rating (250 V AC), response time (slow-blow), and package dimensions (5x20mm). Mixing is acceptable from an electrical standpoint, but verify breaking capacity requirements for your specific fault current environment.

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