Littelfuse 023201.6M Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 023201.6M is a 1.6 A, 250 V AC/DC glass cartridge fuse with a 5mm x 20mm form factor, designed for medium-blow response applications. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications. Substitute parts must preserve the 1.6 A current rating, 250 V voltage rating, 5mm x 20mm package dimensions, and medium-blow response characteristics to ensure direct functional replacement in existing designs.

Key Parameters

Parameter	Specification
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
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (1.6 A), voltage rating (250 V AC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (medium blow), and breaking capacity (100 A). All identified substitutes maintain these core electrical and mechanical specifications. Variations in melting I²t, DC cold resistance, and approval agencies are permitted within the substitute classification, as these parameters do not affect functional interchangeability in standard applications. Product status (active vs. obsolete) and RoHS compliance are secondary considerations that support component selection strategy but do not disqualify substitution eligibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Package	Response Time	Breaking Capacity (A)	Product Status	Melting I²t	DC Cold Resistance (Ω)	RoHS Status
023201.6M	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Obsolete	7.14	0.0567	RoHS non-compliant
023201.6MXF5P	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Active	6.96	0.0537	ROHS3 Compliant
023201.6MXP	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Active	6.96	0.0537	ROHS3 Compliant
023401.6MXBP	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Active	6.14	0.0884	ROHS3 Compliant
023401.6MXP	Littelfuse Inc.	1.6	250	5mm x 20mm	Medium Blow	100	Active	6.14	0.0884	ROHS3 Compliant
BK/GMC-1.6-R	Eaton - Electronics Division	1.6	250	5mm x 20mm	Medium Blow	100	Active	5.8	0.067	ROHS3 Compliant
BK1/GMC-1.6-R	Eaton - Electronics Division	1.6	250	5mm x 20mm	Medium Blow	100	Active	5.8	0.067	ROHS3 Compliant
GMC-1.6-R	Eaton - Electronics Division	1.6	250	5mm x 20mm	Medium Blow	100	Active	5.8	0.067	ROHS3 Compliant
MSC-1.6A	OptiFuse	1.6	250	5mm x 20mm	Medium Blow	100	Active	7.795	—	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain electrical and mechanical equivalence to the 023201.6M. Selection among active alternatives should prioritize parts with ROHS3 compliance and current product status to support long-term supply chain stability. Littelfuse 023201.6MXP and 023201.6MXF5P offer direct series continuity within the 232 product line and are available in active status with enhanced compliance certifications. Littelfuse 023401.6MXP and 023401.6MXBP represent the 234 series evolution with expanded approval agencies including UL, CSA, and K-MARK certifications. Eaton GMC series variants (BK/GMC-1.6-R, BK1/GMC-1.6-R, GMC-1.6-R) provide cross-manufacturer equivalence with CSA, UL, and KC-MARK approvals. OptiFuse MSC-1.6A offers an alternative manufacturer option with cULus and UL 248 certifications. All substitutes are suitable for direct replacement in applications requiring 1.6 A, 250 V AC/DC protection with medium-blow response in 5mm x 20mm cartridge form factor.

Frequently Asked Questions (FAQ)

Q: Can 023201.6MXP directly replace the obsolete 023201.6M?

A: Yes. Both parts share identical electrical specifications (1.6 A, 250 V AC/DC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (medium blow), and breaking capacity (100 A). The 023201.6MXP is active status with ROHS3 compliance, making it the primary direct replacement.

Q: What is the difference between Littelfuse 232 and 234 series fuses?

A: Both series maintain the specified 1.6 A, 250 V, 5mm x 20mm electrical and mechanical parameters. The 234 series (023401.6MXBP, 023401.6MXP) includes expanded approval agencies (UL, CSA, K-MARK, PSE) compared to the 232 series. Selection between series depends on application certification requirements.

Q: Are Eaton GMC-1.6-R variants interchangeable with Littelfuse parts?

A: Yes. BK/GMC-1.6-R, BK1/GMC-1.6-R, and GMC-1.6-R maintain identical current rating (1.6 A), voltage rating (250 V AC), package (5mm x 20mm), response time (medium blow), and breaking capacity (100 A). These Eaton parts are cross-manufacturer equivalents suitable for direct substitution.

Q: Does melting I²t variation affect substitution eligibility?

A: Melting I²t variations among the substitute parts (ranging from 5.8 to 7.795) do not disqualify substitution, as all parts maintain the specified 1.6 A current rating and medium-blow response time. Application-specific thermal requirements should be evaluated independently.

Q: What packaging options are available for these substitutes?

A: All substitute parts are supplied in bulk packaging. The 023201.6MXF5P is also available in bulk format. Packaging does not affect electrical or mechanical interchangeability; selection depends on procurement and inventory management requirements.

Q: Which substitute offers the best compliance profile?

A: Littelfuse 023401.6MXP and 023401.6MXBP offer the broadest approval agency coverage (CE, CSA, K-MARK, PSE, UL) with ROHS3 compliance. Eaton GMC variants provide CSA and UL certifications. OptiFuse MSC-1.6A includes cULus and UL 248 certifications. Selection should align with specific application and regional certification requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message