Littelfuse 0213004.TXP Glass Cartridge Fuse 4A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0213004.TXP is a 4A 250VAC glass cartridge fuse in 5x20mm form factor with slow-blow response characteristics. This component is classified as Active product status and is designed for applications requiring overcurrent protection in AC/DC circuits. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time classification, and regulatory approvals to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	4 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	40A
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 0213004.TXP are categorized based on strict parameter matching across electrical and mechanical specifications. The primary substitution criteria are:

Critical Matching Parameters:

Current Rating: 4 A (exact match required)
Voltage Rating: 250 V AC (exact match required)
Package Dimensions: 5x20mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Mounting: Requires Holder (exact match required)

Secondary Consideration Parameters:

Breaking Capacity @ Rated Voltage (40A minimum acceptable)
Melting I²t value (determines thermal response characteristics)
DC Cold Resistance (affects circuit behavior)
Regulatory Approvals (determines regional compliance)

Substitutes are divided into two categories: Littelfuse parametric equivalents (same manufacturer, different series) and manufacturer-recommended alternatives (different manufacturers with equivalent electrical and mechanical performance).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ω)	Product Status
0213004.TXP	Littelfuse Inc.	213	4	250	Slow Blow	5x20mm	40	226.505	0.017	Active
0213004.MXP	Littelfuse Inc.	213	4	250	Slow Blow	5x20mm	40	226.505	0.017	Active
0218004.HXP	Littelfuse Inc.	218	4	250	Slow Blow	5x20mm	40	69.1	0.0129	Active
0218004.MXP	Littelfuse Inc.	218	4	250	Slow Blow	5x20mm	40	69.1	0.0129	Active
0218004.TXP	Littelfuse Inc.	218	4	250	Slow Blow	5x20mm	40	69.1	0.0129	Active
0219004.MXABP	Littelfuse Inc.	219XA	4	250	Slow Blow	5x20mm	150	330	0.0158	Active
5ET 4-R	Bel Fuse Inc.	5ET	4	250	Slow Blow	5x20mm	150	300	0.016	Active
5ST 4-R	Bel Fuse Inc.	5ST	4	250	Slow Blow	5x20mm	40	56	0.014	Active
BK/GDC-4A	Eaton - Electronics Division	GDC	4	250	Slow Blow	5x20mm	40	71.8	0.0139	Active
BK/GMD-4-R	Eaton - Electronics Division	GMD	4	250	Slow Blow	5x20mm	200	300	0.048	Active
BK/S506-4-R	Eaton - Electronics Division	S506	4	250	Slow Blow	5x20mm	40	71.8	0.0139	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and are ROHS3 compliant. Selection among equivalents should be based on:

Littelfuse Series 213 and 218 Equivalents: Direct substitutes within the Littelfuse product line. Series 213 (0213004.TXP and 0213004.MXP) and Series 218 variants (0218004.HXP, 0218004.MXP, 0218004.TXP) are functionally equivalent with identical current, voltage, and package specifications. Series 218 variants feature lower melting I²t values (69.1 vs. 226.505), resulting in faster thermal response within the slow-blow classification.

Littelfuse Series 219XA (0219004.MXABP): Maintains all critical electrical and mechanical parameters with enhanced breaking capacity (150A vs. 40A) and higher melting I²t (330 vs. 226.505). Suitable for applications requiring higher fault current handling capability.

Bel Fuse Inc. Alternatives: The 5ET 4-R and 5ST 4-R maintain equivalent electrical ratings and 5x20mm package dimensions. The 5ET 4-R provides 150A breaking capacity; the 5ST 4-R matches the 40A breaking capacity of the original part. Both are certified to CCC, CE, CSA, and VDE standards.

Eaton Electronics Division Options: BK/GDC-4A and BK/S506-4-R provide 40A breaking capacity matching the original specification. BK/GMD-4-R offers enhanced 200A breaking capacity for high-fault-current applications. All Eaton variants maintain 5x20mm package compatibility and slow-blow response characteristics.

Regulatory approval alignment should be verified against specific application requirements. The original 0213004.TXP carries BSI, CCC, CE, CSA, PSE, SEMKO, UR, and VDE certifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute a Series 218 fuse for the original Series 213 part?

A: Yes. Series 218 variants (0218004.HXP, 0218004.MXP, 0218004.TXP) are direct electrical and mechanical equivalents. The primary difference is melting I²t value (69.1 vs. 226.505), which affects thermal response speed within the slow-blow classification. Both maintain 4A current rating, 250V voltage rating, and 5x20mm package dimensions.

Q: What is the significance of breaking capacity differences among substitutes?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt at rated voltage. The original 0213004.TXP has 40A breaking capacity. Substitutes with higher breaking capacity (150A or 200A) provide enhanced protection in high-fault-current circuits but are fully backward compatible in standard applications. Lower breaking capacity is not acceptable.

Q: Are Bel Fuse and Eaton alternatives fully compatible with the original Littelfuse part?

A: Yes, provided all critical parameters match: 4A current rating, 250V AC voltage rating, 5x20mm package dimensions, cartridge glass fuse type, slow-blow response, and holder-mount configuration. Verify regulatory certifications align with application requirements, as approval agencies vary by manufacturer and series.

Q: Does melting I²t value affect circuit performance?

A: Melting I²t determines the thermal energy required to melt the fuse element and is a characteristic of response time within the slow-blow classification. Lower I²t values result in faster thermal response. Both the original part (226.505) and Series 218 alternatives (69.1) are classified as slow-blow and are functionally equivalent for standard circuit protection applications.

Q: Can I use a substitute with different DC cold resistance?

A: DC cold resistance variations among substitutes are minor (0.0129Ω to 0.048Ω range). The original part measures 0.017Ω. Substitutes with similar resistance values (within ±0.005Ω) are directly compatible. The BK/GMD-4-R variant with 0.048Ω resistance may introduce measurable voltage drop in low-impedance circuits and should be evaluated for specific applications.

Q: What regulatory certifications should I verify before substitution?

A: The original 0213004.TXP carries BSI, CCC, CE, CSA, PSE, SEMKO, UR, and VDE certifications. Substitute parts carry varying certification sets. Verify that the selected substitute meets all regulatory requirements for your target market and application. For example, PSE certification is required for Japanese market applications; UL/cURus certification is required for North American applications.

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