Littelfuse 0213.250MXP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0213.250MXP is a 250 mA, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor. This fuse is designed for circuit protection in applications requiring slow-blow response characteristics and is actively manufactured. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time classification, and approval certifications to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	250 mA
Voltage Rating (AC)	250 V
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0213.250MXP is determined by the following mandatory parameters:

Current Rating: 250 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Package Dimensions: 5mm x 20mm (exact match required)
Response Time: Slow Blow (exact match required)
Fuse Type: Cartridge, Glass (exact match required)

Substitute parts are grouped into two categories based on breaking capacity and melting I²t characteristics, which represent design variations within the same electrical and mechanical specification envelope. All substitute parts maintain the same current, voltage, package, and response time classification as the main part.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Package	Response Time	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ω)	Product Status
0213.250MXP	Littelfuse Inc.	213	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.555	1.0495	Active
0218.250HXP	Littelfuse Inc.	218	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.5405	1.0495	Active
0218.250MXP	Littelfuse Inc.	218	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.5405	1.0495	Active
0218.250TXP	Littelfuse Inc.	218	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.5405	1.0495	Active
0219.250MXAP	Littelfuse Inc.	219XA	250 mA	250 V	5mm x 20mm	Slow Blow	150 A	0.54	1.0495	Active
0239.250HXP	Littelfuse Inc.	239	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.34	3.07	Active
0239.250MXP	Littelfuse Inc.	239	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.34	3.07	Active
0618.250MXP	Littelfuse Inc.	618	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.5405	1.0495	Active
0034.3111	SCHURTER Inc.	FST 5x20	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.238	Not specified	Active
0034.5611.11	SCHURTER Inc.	SMD-FST	250 mA	250 V	5mm x 20mm	Slow Blow	35 A	0.238	Not specified	Active
TSC-250MA	OptiFuse	TSC	250 mA	250 V	5mm x 20mm	Slow Blow	100 A	0.278	Not specified	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and meet the core electrical and mechanical requirements for direct substitution with the 0213.250MXP. Selection among substitutes should be based on the following criteria:

Littelfuse Series 218, 239, and 618 (Littelfuse Inc.): These parts share identical current, voltage, and package specifications with the main part. Series 218 and 618 variants exhibit melting I²t values (0.5405) and DC cold resistance (1.0495 Ω) closely aligned with the main part. Series 239 variants show different thermal characteristics (melting I²t of 0.34, DC cold resistance of 3.07 Ω) and should be selected only when these thermal properties are compatible with the application. Series 219XA offers elevated breaking capacity (150 A versus 35 A) while maintaining equivalent electrical ratings.

SCHURTER FST and SMD-FST Series (SCHURTER Inc.): Parts 0034.3111 and 0034.5611.11 provide equivalent electrical and mechanical specifications with lower melting I²t values (0.238), indicating faster thermal response within the slow-blow classification. These parts carry cURus and VDE certifications.

OptiFuse TSC Series (OptiFuse): Part TSC-250MA meets all core specifications with a breaking capacity of 100 A and melting I²t of 0.278. This part carries cULus and UL 248 certifications.

Approval agency certifications vary across substitute parts. The main part 0213.250MXP carries BSI, CCC, CE, CSA, SEMKO, UR, and VDE certifications. Verify that selected substitute parts carry certifications required for the target application and regulatory jurisdiction.

Frequently Asked Questions (FAQ)

Q: Can I substitute any of these parts directly for the 0213.250MXP?

A: All listed parts meet the mandatory electrical and mechanical specifications (250 mA, 250 V, 5mm x 20mm, slow-blow response). However, verify that the substitute part's approval certifications (BSI, CCC, CE, CSA, SEMKO, UR, VDE, UL, KC, cURus) satisfy your application's regulatory requirements. Differences in melting I²t and breaking capacity may affect thermal response and fault-clearing behavior in specific circuit topologies.

Q: What is the significance of melting I²t differences among these parts?

A: Melting I²t is a thermal characteristic that determines the fuse's response speed to overcurrent conditions. The main part 0213.250MXP has a melting I²t of 0.555. Substitute parts range from 0.238 to 0.54. Lower melting I²t values indicate faster thermal response. Select substitutes with melting I²t values appropriate to your circuit's overcurrent protection requirements.

Q: Are there differences in breaking capacity among these substitutes?

A: Yes. Most substitutes have a breaking capacity of 35 A, matching the main part. However, 0219.250MXAP offers 150 A breaking capacity, and TSC-250MA offers 100 A. Breaking capacity indicates the maximum fault current the fuse can safely interrupt. Select a breaking capacity appropriate to your circuit's maximum available fault current.

Q: Do all substitutes have the same approval certifications as the main part?

A: No. Certification coverage varies. The main part carries BSI, CCC, CE, CSA, SEMKO, UR, and VDE approvals. Substitute parts carry different certification combinations. Verify that your selected substitute carries certifications required by your application's regulatory standards and target markets.

Q: Can I use these substitutes interchangeably in the same fuse holder?

A: Yes, all parts share identical 5mm x 20mm package dimensions and require the same holder type. Physical installation is interchangeable. However, electrical performance differences (melting I²t, breaking capacity, DC cold resistance) may affect circuit behavior, so verify compatibility with your specific application requirements.

Q: What is the difference between Littelfuse Series 218 and Series 239?

A: Both series maintain identical current, voltage, and package specifications. The primary difference is DC cold resistance: Series 218 has 1.0495 Ω, while Series 239 has 3.07 Ω. Series 239 also exhibits lower melting I²t (0.34 versus 0.5405), indicating faster thermal response. Select based on your circuit's resistance and thermal response requirements.

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