Littelfuse 0239001.H Glass Cartridge Fuse 1A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0239001.H is a 1 A 250 V AC/DC glass cartridge fuse with slow-blow response characteristics, housed in a 5mm x 20mm form factor requiring a dedicated holder. This part is classified as obsolete. Due to its obsolete status, identifying active equivalent and substitute parts is necessary to maintain circuit protection functionality in applications requiring this fuse specification.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35 A
Operating Temperature Range	-55°C to 125°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 0239001.H is determined by strict equivalence across the following parameters:

Current Rating: 1 A (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)
Breaking Capacity @ Rated Voltage: 35 A (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)

All substitute parts listed below meet these criteria and are classified as active products, ensuring continued availability and support.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ω)	Product Status	RoHS Status
0239001.H	Littelfuse Inc.	239	1	250	Slow Blow	5x20mm	35	11.6	0.313	Obsolete	RoHS non-compliant
0213001.MXBP	Littelfuse Inc.	213	1	250	Slow Blow	5x20mm	35	19.2	0.1165	Active	ROHS3 Compliant
0213001.MXP	Littelfuse Inc.	213	1	250	Slow Blow	5x20mm	35	19.2	0.1165	Active	ROHS3 Compliant
0213001.TXP	Littelfuse Inc.	213	1	250	Slow Blow	5x20mm	35	19.2	0.1165	Active	ROHS3 Compliant
0218001.HXP	Littelfuse Inc.	218	1	250	Slow Blow	5x20mm	35	6.73	0.0613	Active	ROHS3 Compliant
0218001.MXBP	Littelfuse Inc.	218	1	250	Slow Blow	5x20mm	35	6.73	0.0613	Active	ROHS3 Compliant
0218001.MXF5P	Littelfuse Inc.	218	1	250	Slow Blow	5x20mm	35	6.73	0.0613	Active	ROHS3 Compliant
0218001.MXP	Littelfuse Inc.	218	1	250	Slow Blow	5x20mm	35	6.73	0.0613	Active	ROHS3 Compliant
0218001.TXP	Littelfuse Inc.	218	1	250	Slow Blow	5x20mm	35	6.73	0.0613	Active	ROHS3 Compliant
0218001.VXP	Littelfuse	218	1	250	Slow Blow	5x20mm	35	6.73	0.0613	Active	ROHS3 Compliant
0219001.MXABP	Littelfuse Inc.	219XA	1	250	Slow Blow	5x20mm	150	19.2	0.1165	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are manufactured by Littelfuse Inc. and maintain active product status, ensuring long-term availability and supply chain continuity. The 0213001 series (MXBP, MXP, TXP) and 0218001 series (HXP, MXBP, MXF5P, MXP, TXP, VXP) are direct functional equivalents with ROHS3 compliance, addressing environmental and regulatory requirements that the obsolete 0239001.H does not meet.

The 0219001.MXABP variant offers enhanced breaking capacity (150 A versus 35 A) while maintaining all other electrical and mechanical specifications. This part is suitable for applications requiring higher fault current interruption capability.

Series 213 parts exhibit higher melting I²t values (19.2) compared to Series 218 parts (6.73), indicating different thermal response profiles. Series 218 parts feature lower DC cold resistance (0.0613 Ω versus 0.1165 Ω), resulting in reduced voltage drop under normal operating conditions.

Selection should prioritize active parts with ROHS3 compliance. Packaging variants (MXBP, MXP, TXP, HXP, MXF5P, VXP) indicate different tape-and-reel or bulk configurations; functional performance remains equivalent across these variants within each series.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts directly replace the 0239001.H?

A: Yes. All listed parts share identical current rating (1 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), package dimensions (5x20mm), and mounting requirements (requires holder). They are mechanically and electrically interchangeable.

Q: What is the difference between Series 213 and Series 218?

A: Series 213 and Series 218 differ in melting I²t and DC cold resistance. Series 213 has melting I²t of 19.2 and DC cold resistance of 0.1165 Ω. Series 218 has melting I²t of 6.73 and DC cold resistance of 0.0613 Ω. Both meet the 35 A breaking capacity requirement of the original part.

Q: Why is the 0219001.MXABP listed if it has a different breaking capacity?

A: The 0219001.MXABP maintains all critical electrical and mechanical parameters (current, voltage, response time, package, mounting type, operating temperature) required for substitution. Its 150 A breaking capacity exceeds the original 35 A specification, making it suitable for applications with higher fault current levels while remaining compatible with existing fuse holders.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, whereas the original 0239001.H is RoHS non-compliant. This compliance status is relevant for applications subject to environmental regulations.

Q: What do the packaging variant suffixes (MXBP, MXP, TXP, HXP, MXF5P, VXP) indicate?

A: These suffixes denote different packaging and distribution formats (bulk, tape-and-reel configurations). They do not affect electrical or mechanical performance. Selection depends on procurement and assembly requirements.

Q: Is the 0239001.H still available?

A: The 0239001.H is classified as obsolete. Current inventory is limited (766 pieces). For new designs or long-term supply assurance, selection of an active substitute part is recommended.

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