Littelfuse 023201.6MXW Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 023201.6MXW is a 1.6 A, 250 V AC/DC glass cartridge fuse with a 5mm x 20mm form factor, designed for applications requiring medium-blow response characteristics. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility. Substitute parts must preserve the core electrical ratings, physical dimensions, and functional performance to ensure seamless integration into existing circuit protection designs.

Key Parameters

Parameter	Value
Current Rating	1.6 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Medium Blow
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-55°C to 125°C
Mounting Type	Requires Holder

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:

Current Rating: 1.6 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Response Time: Medium Blow (exact match required)
Breaking Capacity @ Rated Voltage: 100 A (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)

All substitute parts listed below satisfy these mandatory parameters. Variations in secondary characteristics such as melting I²t, DC cold resistance, and approval agencies do not preclude substitution when primary electrical and mechanical specifications align.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Package	Response Time	Breaking Capacity (A)	Mounting Type	Product Status	RoHS Status
023201.6MXW	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Requires Holder	Obsolete	RoHS non-compliant
023201.6MXEP	Littelfuse Inc.	1.6	250	5mm x 20mm (Axial)	Medium Blow	100	Through Hole	Active	ROHS3 Compliant
023201.6MXF5P	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Requires Holder	Active	ROHS3 Compliant
023201.6MXP	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Requires Holder	Active	ROHS3 Compliant
023401.6MXBP	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Requires Holder	Active	ROHS3 Compliant
023401.6MXP	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Requires Holder	Active	ROHS3 Compliant
MSC-1.6A	OptiFuse	1.6	250	5mm x 20mm	Medium Blow	100	Requires Holder	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain electrical and mechanical equivalence to the 023201.6MXW. Selection should prioritize active product status and current compliance certifications:

Primary Recommendation: 023201.6MXP or 023201.6MXF5P (Littelfuse Inc., Series 232) — Both are active products with ROHS3 compliance and CE, KC, PSE certifications. These parts are direct functional replacements with identical mounting requirements and package dimensions.

Alternative Recommendation: 023401.6MXP (Littelfuse Inc., Series 234) — Active product with expanded approval agency coverage including CSA, K-MARK, UL, and PSE. Suitable for applications requiring broader regulatory compliance.

Cross-Manufacturer Option: MSC-1.6A (OptiFuse, Series MSC) — Active product with cULus and UL 248 certifications. Provides equivalent electrical performance with alternative manufacturer sourcing.

Mounting Consideration: 023201.6MXEP differs in mounting type (Through Hole vs. Requires Holder). This part is suitable only for applications with compatible through-hole fuse holder designs.

Frequently Asked Questions (FAQ)

Q: Can 023201.6MXP directly replace 023201.6MXW without circuit modification?

A: Yes. Both parts share identical current rating (1.6 A), voltage rating (250 V AC), package dimensions (5mm x 20mm), response time (Medium Blow), and mounting type (Requires Holder). No circuit modification is required.

Q: What is the difference between 023201.6MXP and 023401.6MXP?

A: Both parts meet all electrical and mechanical substitution criteria. The primary difference is series designation (232 vs. 234) and approval agency coverage. Series 234 includes UL and CSA certifications in addition to CE, KC, and PSE.

Q: Is 023201.6MXEP compatible with existing fuse holders designed for 023201.6MXW?

A: No. The 023201.6MXEP is designed for through-hole mounting and has different physical dimensions (0.228" Dia x 0.886" L vs. 0.205" Dia x 0.787" L). It requires a compatible through-hole fuse holder and is not suitable for standard cartridge fuse holders.

Q: Are there RoHS compliance implications when substituting 023201.6MXW?

A: Yes. The original 023201.6MXW is RoHS non-compliant. All active substitute parts (023201.6MXP, 023201.6MXF5P, 023401.6MXBP, 023401.6MXP, MSC-1.6A) are ROHS3 compliant, meeting current environmental regulations.

Q: Can OptiFuse MSC-1.6A be used in applications requiring Littelfuse-specific certifications?

A: MSC-1.6A carries cULus and UL 248 certifications. Compatibility depends on application-specific certification requirements. Verify that UL 248 certification satisfies design specifications before substitution.

Q: What inventory considerations apply to these substitute parts?

A: All substitute parts are in active production with available inventory. 023401.6MXP has the highest inventory level (1851 Pcs), followed by 023201.6MXP (898 Pcs) and MSC-1.6A (1610 Pcs).

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