Littelfuse 0237005.M Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0237005.M is a 5 A, 125 V AC/DC glass cartridge fuse with a 5mm x 20mm form factor, rated for medium blow response. This part is classified as obsolete. Equivalent and substitute parts are available from active product lines within Littelfuse and from alternative manufacturers including Eaton, offering direct functional replacement with improved availability and compliance status.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	125 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Medium Blow
Breaking Capacity @ Rated Voltage	10 kA
Mounting Type	Requires Holder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitution for the 0237005.M is determined by strict equivalence across the following parameters:

Current Rating: 5 A
Voltage Rating (AC): 125 V
Fuse Type: Cartridge, Glass
Package / Case: 5mm x 20mm
Response Time: Medium Blow
Breaking Capacity @ Rated Voltage: 10 kA
Mounting Type: Requires Holder

All substitute parts listed maintain these core electrical and mechanical specifications. Littelfuse Series 233 parts (0233005.MXP, 0233005.MXBP, 0233005.MXF5P, 0233005.MXF11P, 0233005.MXF35P, 0233005.MXF36P) are direct parametric equivalents with active product status. Littelfuse Series 232 part (0232005.MX125P) is a parametric equivalent with active status. Eaton GMC series parts (BK/GMC-5-R, BK1/GMC-5-R, BP/GMC-5) are parametric equivalents from an alternative manufacturer with active product status.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package / Case	Breaking Capacity (kA)	Product Status	RoHS Status
0237005.M	Littelfuse Inc.	5	125	Medium Blow	5mm x 20mm	10	Obsolete	RoHS non-compliant
0233005.MXP	Littelfuse	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
0232005.MX125P	Littelfuse Inc.	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
0233005.MXBP	Littelfuse Inc.	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
0233005.MXF11P	Littelfuse Inc.	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
0233005.MXF35P	Littelfuse Inc.	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
0233005.MXF36P	Littelfuse Inc.	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
0233005.MXF5P	Littelfuse Inc.	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
BK/GMC-5-R	Eaton - Electronics Division	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
BK1/GMC-5-R	Eaton - Electronics Division	5	125	Medium Blow	5mm x 20mm	10	Active	ROHS3 Compliant
BP/GMC-5	Eaton - Bussmann Electrical Division	5	125	Medium Blow	5mm x 20mm	10	Active	RoHS Compliant

Engineering Selection Recommendations

All listed substitute parts maintain electrical and mechanical equivalence to the 0237005.M. Selection among substitutes should be based on the following factors:

Littelfuse Series 233 parts (0233005.MXP, 0233005.MXBP, 0233005.MXF5P, 0233005.MXF11P, 0233005.MXF35P, 0233005.MXF36P) are recommended as primary substitutes. These parts are active, ROHS3 compliant, and carry approvals from CE, CSA, KC, PSE, and UL. Inventory availability ranges from 690 to 1866 units.

Littelfuse Series 232 part (0232005.MX125P) is an active parametric equivalent with ROHS3 compliance and approvals from CE, KC, and PSE. This part carries 1040 units in inventory.

Eaton GMC series parts (BK/GMC-5-R, BK1/GMC-5-R, BP/GMC-5) are active alternatives from an alternative manufacturer. BK/GMC-5-R and BK1/GMC-5-R carry approvals from CSA, KC, MITI, and UL with ROHS3 compliance. BP/GMC-5 carries RoHS compliance. Inventory availability ranges from 785 to 2290 units.

The original 0237005.M is obsolete and RoHS non-compliant. Direct replacement with any active, compliant substitute is appropriate for new designs and ongoing production.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the 0237005.M?

A: Yes. All listed substitute parts maintain the same current rating (5 A), voltage rating (125 V AC), fuse type (cartridge, glass), package dimensions (5mm x 20mm), response time (medium blow), and breaking capacity (10 kA). They are mechanically and electrically equivalent.

Q: What is the difference between Littelfuse Series 233 and Series 232 parts?

A: Both series maintain identical electrical and mechanical specifications for this 5 A, 125 V application. The primary difference is the melting I²t value: Series 233 parts have a melting I²t of 89.975, while Series 232 (0232005.MX125P) has a melting I²t of 56.72. Both are active products with ROHS3 compliance.

Q: Are Eaton GMC series fuses compatible with the same holder as the Littelfuse parts?

A: Yes. All substitute parts share the same 5mm x 20mm package dimensions and require a holder for mounting. They are mechanically compatible with the same fuse holder used for the 0237005.M.

Q: Why is the original 0237005.M listed as obsolete?

A: The 0237005.M is classified as obsolete by Littelfuse. Active equivalent products are available from the Series 233 and Series 232 product lines, which offer improved compliance status and continued manufacturer support.

Q: Which substitute part should I select for new designs?

A: For new designs, select from active product lines: Littelfuse Series 233 (0233005.MXP, 0233005.MXBP, 0233005.MXF5P, 0233005.MXF11P, 0233005.MXF35P, 0233005.MXF36P), Littelfuse Series 232 (0232005.MX125P), or Eaton GMC series (BK/GMC-5-R, BK1/GMC-5-R, BP/GMC-5). All are ROHS3 compliant and carry appropriate regulatory approvals.

Q: What regulatory approvals do these substitute parts carry?

A: Littelfuse Series 233 parts carry CE, CSA, KC, PSE, and UL approvals. Littelfuse Series 232 carries CE, KC, and PSE approvals. Eaton BK/GMC-5-R and BK1/GMC-5-R carry CSA, KC, MITI, and UL approvals. Eaton BP/GMC-5 carries no specific approvals listed. Verify approvals against your application requirements.

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