Littelfuse 021302.5M Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 021302.5M is a 2.5 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 available in active product status with improved compliance profiles, including RoHS3 compliance and expanded certification coverage. Selection of active alternatives ensures long-term supply availability and regulatory compliance for new designs and production continuity.

Key Parameters

Parameter	Value
Current Rating	2.5 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

Substitute Part Grouping Explanation

Substitution of the 021302.5M is determined by strict equivalence across the following electrical and mechanical parameters:

Current Rating: 2.5 A (exact match required)
Voltage Rating: 250 V AC (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: 35 A (exact match required)
Operating Temperature: -55°C to 125°C (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in series designation (213 vs. 218), packaging format (Bulk vs. other), and internal resistance characteristics do not affect functional equivalence within the specified parameter set. Product status transitions from obsolete to active, and RoHS compliance improvements, support supply chain continuity without functional compromise.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage (V AC)	Response	Package	Breaking Capacity (A)	Product Status	RoHS Status	Inventory (Pcs)
021302.5M	Littelfuse Inc.	213	2.5	250	Slow Blow	5mm x 20mm	35	Obsolete	Non-compliant	1143
021302.5MXBP	Littelfuse Inc.	213	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	880
021302.5MXP	Littelfuse Inc.	213	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	1732
021302.5TXP	Littelfuse Inc.	213	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	834
021802.5HXP	Littelfuse	218	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	21272
021802.5MXBP	Littelfuse Inc.	218	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	628
021802.5MXF11P	Littelfuse Inc.	218	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	934
021802.5MXF5P	Littelfuse Inc.	218	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	1019
021802.5MXP	Littelfuse Inc.	218	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	11400
021802.5TXP	Littelfuse Inc.	218	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	880
021802.5VXP	Littelfuse Inc.	218	2.5	250	Slow Blow	5mm x 20mm	35	Active	ROHS3 Compliant	920

Engineering Selection Recommendations

All listed substitute parts maintain functional equivalence to the 021302.5M across specified electrical and mechanical parameters. Selection among active alternatives should prioritize:

Product Status: All substitute parts carry active product status, ensuring ongoing manufacturing support and supply chain availability. The 021302.5M obsolete status necessitates transition to active equivalents for production continuity.

Regulatory Compliance: All substitute parts are RoHS3 compliant, addressing regulatory requirements that the original 021302.5M does not meet. Certification coverage across substitute parts includes CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, and VDE, providing broad geographic and application compliance.

Inventory Availability: Series 218 parts, particularly 021802.5MXP (11,400 pcs), 021802.5HXP (21,272 pcs), and 021802.5MXF5P (1,019 pcs), offer higher stock levels for immediate procurement. Series 213 alternatives (021302.5MXP, 021302.5MXBP, 021302.5TXP) provide direct series continuity with active status.

Packaging Format: Bulk packaging is standard across all substitutes. Selection between specific part numbers within the same series and current rating reflects packaging and certification variations without affecting electrical performance.

Frequently Asked Questions (FAQ)

Q: Can 021302.5M be directly replaced with any of the listed substitutes?

A: Yes. All listed parts maintain identical current rating (2.5 A), voltage rating (250 V AC), response time (slow blow), package dimensions (5mm x 20mm), and breaking capacity (35 A). Direct mechanical and electrical substitution is supported without circuit modification.

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

A: Both series maintain the specified electrical and mechanical parameters. Series 218 parts show higher inventory availability and expanded certification coverage (K-MARK, UL). Series 213 alternatives provide direct series continuity with the original part. Selection between series does not affect functional performance within the specified parameter set.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status. The original 021302.5M is RoHS non-compliant. Transition to any substitute part addresses RoHS regulatory requirements.

Q: Does the packaging format (Bulk) affect compatibility?

A: No. Packaging format designates order and delivery configuration only. All parts use identical 5mm x 20mm cartridge form factor and require the same holder type. Packaging format does not affect electrical or mechanical compatibility.

Q: Which substitute offers the best supply availability?

A: 021802.5HXP (21,272 pcs) and 021802.5MXP (11,400 pcs) provide the highest inventory levels. Both maintain full electrical and mechanical equivalence to the 021302.5M.

Q: Are certification differences between substitutes significant for component selection?

A: Certification differences reflect geographic and application-specific approvals. All substitutes carry core certifications (CE, CSA, PSE, SEMKO, VDE). Selection should align with target application geography and regulatory requirements. Series 218 parts include K-MARK and UL certifications, expanding geographic coverage.

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