Littelfuse 02393.15H Glass Cartridge Fuse 3.15A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 02393.15H is a 3.15 A, 250 V AC/DC glass cartridge fuse in 5mm x 20mm form factor with slow-blow response characteristics. This part is classified as obsolete. Equivalent and substitute parts are necessary to maintain circuit protection functionality in applications where the original part is no longer available or where design flexibility is required for procurement optimization.

Key Parameters

Parameter	Value
Current Rating	3.15 A
Voltage Rating (AC)	250 V
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitution for the 02393.15H is determined by strict equivalence across the following parameters: current rating (3.15 A), voltage rating (250 V AC), package dimensions (5mm x 20mm), fuse type (cartridge glass), response time (slow blow), and mounting configuration (requires holder). All substitute parts listed maintain these core electrical and mechanical specifications.

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent: Parts from the same manufacturer (Littelfuse) with identical electrical ratings and form factor but different product status or packaging configuration.

Parametric Equivalents: Parts from the same manufacturer with identical electrical ratings and form factor but from different series designations, which may exhibit variations in breaking capacity, melting I²t characteristics, or approval agency certifications.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (A)	Voltage (V AC)	Package	Response Time	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Product Status	RoHS Status
02393.15H	Littelfuse Inc.	239	3.15	250	5mm x 20mm	Slow Blow	100A	131.5	0.0425	Obsolete	RoHS non-compliant
02393.15HXP	Littelfuse Inc.	239	3.15	250	5mm x 20mm	Slow Blow	100A	128.05	0.414	Active	ROHS3 Compliant
02133.15HXP	Littelfuse Inc.	213	3.15	250	5mm x 20mm	Slow Blow	35A	202	0.0231	Active	ROHS3 Compliant
02133.15MXBP	Littelfuse Inc.	213	3.15	250	5mm x 20mm	Slow Blow	35A	202	0.0231	Active	ROHS3 Compliant
02133.15MXP	Littelfuse Inc.	213	3.15	250	5mm x 20mm	Slow Blow	35A	202	0.0231	Active	ROHS3 Compliant
02133.15TXP	Littelfuse Inc.	213	3.15	250	5mm x 20mm	Slow Blow	35A	202	0.0231	Active	ROHS3 Compliant
02183.15HXP	Littelfuse Inc.	218	3.15	250	5mm x 20mm	Slow Blow	35A	38.15	0.0173	Active	ROHS3 Compliant
02183.15MXBP	Littelfuse Inc.	218	3.15	250	5mm x 20mm	Slow Blow	35A	38.15	0.0173	Active	ROHS3 Compliant
02183.15MXF18P	Littelfuse Inc.	218	3.15	250	5mm x 20mm	Slow Blow	35A	38.15	0.0173	Active	ROHS3 Compliant
02183.15MXF34P	Littelfuse Inc.	218	3.15	250	5mm x 20mm	Slow Blow	35A	38.15	0.0173	Active	ROHS3 Compliant
02183.15MXF5P	Littelfuse Inc.	218	3.15	250	5mm x 20mm	Slow Blow	35A	38.15	0.0173	Active	ROHS3 Compliant

Engineering Selection Recommendations

02393.15HXP is the primary direct equivalent. It maintains the same series designation (239), identical electrical ratings, and active product status. This part is RoHS3 compliant and represents the current production alternative to the obsolete 02393.15H.

Series 213 parts (02133.15HXP, 02133.15MXBP, 02133.15MXP, 02133.15TXP) are parametric equivalents with active status and RoHS3 compliance. These parts differ in breaking capacity (35A versus 100A) and melting I²t (202 versus 131.5), reflecting different thermal response characteristics within the same current and voltage rating.

Series 218 parts (02183.15HXP, 02183.15MXBP, 02183.15MXF18P, 02183.15MXF34P, 02183.15MXF5P) are parametric equivalents with active status and RoHS3 compliance. These parts exhibit the lowest melting I²t value (38.15) among all substitutes, indicating faster thermal response compared to the original part.

All substitute parts maintain the required 3.15 A current rating, 250 V AC voltage rating, 5mm x 20mm package dimensions, slow-blow response time, and glass cartridge construction. Selection among substitutes should be based on application-specific requirements for breaking capacity and thermal response characteristics.

Frequently Asked Questions (FAQ)

Q: Can 02393.15HXP directly replace 02393.15H? A: Yes. The 02393.15HXP maintains identical electrical ratings (3.15 A, 250 V AC), package dimensions (5mm x 20mm), fuse type (cartridge glass), and response time (slow blow). Both require a fuse holder for mounting. The primary difference is product status: 02393.15H is obsolete while 02393.15HXP is active production.

Q: What is the difference between Series 239, 213, and 218? A: All three series maintain the same current rating (3.15 A) and voltage rating (250 V AC) with identical 5mm x 20mm package dimensions. The differences lie in breaking capacity and melting I²t characteristics. Series 239 has 100A breaking capacity and 131.5 melting I²t. Series 213 has 35A breaking capacity and 202 melting I²t. Series 218 has 35A breaking capacity and 38.15 melting I²t. These variations affect thermal response behavior in fault conditions.

Q: Are all substitute parts RoHS compliant? A: The original 02393.15H is RoHS non-compliant. All listed substitute parts are RoHS3 compliant, meeting current environmental regulations.

Q: Do all substitute parts use the same holder? A: Yes. All parts listed are cartridge glass fuses in 5mm x 20mm form factor requiring a standard fuse holder. Mechanical compatibility is maintained across all substitutes.

Q: What approval agencies certify these fuses? A: The original 02393.15H carries CSA, K-MARK, METI, and UL approvals. Substitute parts carry varying certification combinations including BSI, CCC, CE, CSA, KC, PSE, SEMKO, UL, UR, and VDE, depending on series and specific part number.

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