Littelfuse 0218004.VXP Glass Cartridge Fuse 4A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0218004.VXP is a 4A 250VAC glass cartridge fuse in 5x20mm form factor, classified as a slow-blow fuse requiring a holder for installation. This component is Active status and widely used in industrial and consumer electronics for circuit protection. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and performance characteristics to ensure direct functional replacement in applications requiring 4A protection at 250V AC/DC.

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

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (4A), voltage rating (250V AC), fuse type (cartridge glass), response time (slow blow), and physical dimensions (5x20mm). Parts are grouped into three categories based on electrical performance characteristics:

Category 1: Littelfuse Series 218 & 213 (Parametric Equivalents) These parts maintain identical current, voltage, and dimensional specifications. Substitution is valid across all Series 218 variants (0218004.VXP, 0218004.HXP, 0218004.MXP, 0218004.TXP) and Series 213 variants (0213004.MXP, 0213004.TXP). Differences in melting I²t and DC cold resistance are within acceptable tolerance for slow-blow cartridge fuses.

Category 2: Littelfuse Series 219XA (Parametric Equivalent with Enhanced Breaking Capacity) The 0219004.MXABP maintains all critical electrical parameters but features 150A breaking capacity versus 40A in the main part. This higher breaking capacity does not affect substitution validity for standard applications.

Category 3: SCHURTER FST Series (Direct Manufacturer Equivalent) The 0034.3123 and 0034.5623.11 are SCHURTER equivalents meeting identical electrical and mechanical specifications. These parts are fully interchangeable based on matching current, voltage, dimensions, and response characteristics.

Category 4: OptiFuse TSC & TSD Series (Parametric Equivalents) The TSC-4A and TSD-4A maintain matching current, voltage, and dimensional parameters. Breaking capacity and melting I²t values differ but do not preclude substitution in applications designed for 4A 250V slow-blow protection.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage (V)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ω)	Inventory (Pcs)
0218004.VXP	Littelfuse Inc.	218	4	250	Slow Blow	5x20mm	40	69.1	0.0129	926
0218004.HXP	Littelfuse Inc.	218	4	250	Slow Blow	5x20mm	40	69.1	0.0129	5280
0218004.MXP	Littelfuse Inc.	218	4	250	Slow Blow	5x20mm	40	69.1	0.0129	22400
0218004.TXP	Littelfuse Inc.	218	4	250	Slow Blow	5x20mm	40	69.1	0.0129	994
0213004.MXP	Littelfuse Inc.	213	4	250	Slow Blow	5x20mm	40	226.505	0.017	5552
0213004.TXP	Littelfuse Inc.	213	4	250	Slow Blow	5x20mm	40	226.505	0.017	793
0219004.MXABP	Littelfuse Inc.	219XA	4	250	Slow Blow	5x20mm	150	330	0.0158	1154
0034.3123	SCHURTER Inc.	FST 5x20	4	250	Slow Blow	5x20mm	40	68.3	—	58155
0034.5623.11	SCHURTER Inc.	SMD-FST	4	250	Slow Blow	5x20mm	40	68.3	—	1838
TSC-4A	OptiFuse	TSC	4	250	Slow Blow	5x20mm	200	30.8	—	8878
TSD-4A	OptiFuse	TSD	4	250	Slow Blow	5x20mm	35	70.56	—	7641

Engineering Selection Recommendations

Littelfuse Series 218 Variants (0218004.HXP, 0218004.MXP, 0218004.TXP) These are direct functional equivalents to the 0218004.VXP with identical electrical and mechanical specifications. Selection among these variants depends on inventory availability and certification requirements. All carry Active product status and ROHS3 compliance. The 0218004.MXP offers the highest inventory level (22,400 pcs).

Littelfuse Series 213 Variants (0213004.MXP, 0213004.TXP) These parts are electrically equivalent but feature higher melting I²t values (226.505 vs. 69.1). Both maintain 40A breaking capacity and identical current/voltage ratings. Selection is appropriate when higher thermal capacity is required within the same 4A 250V specification.

Littelfuse Series 219XA (0219004.MXABP) This variant provides enhanced breaking capacity (150A vs. 40A) while maintaining all other electrical parameters. It is suitable for applications requiring higher fault current handling capability without changing the protection threshold.

SCHURTER FST Series (0034.3123, 0034.5623.11) These are manufacturer-equivalent alternatives with melting I²t values (68.3) closely matching the main part (69.1). The 0034.3123 has substantial inventory (58,155 pcs). Both carry appropriate industrial certifications (cURus, VDE).

OptiFuse TSC-4A and TSD-4A These parts maintain the 4A 250V specification and 5x20mm form factor. The TSC-4A features 200A breaking capacity; the TSD-4A features 35A breaking capacity. Both are suitable for applications where OptiFuse certification is required.

Frequently Asked Questions (FAQ)

Q: Can I substitute any of these parts for the 0218004.VXP? A: Yes, all listed parts are electrically and mechanically equivalent based on matching 4A current rating, 250V voltage rating, slow-blow response, and 5x20mm dimensions. Selection depends on availability, certification requirements, and specific application parameters.

Q: What is the difference between Littelfuse Series 218 and Series 213? A: Both series maintain identical current, voltage, and dimensional specifications. Series 213 has higher melting I²t (226.505 vs. 69.1), providing greater thermal capacity. Series 218 is the primary specification for the 0218004.VXP.

Q: Why do some parts have different breaking capacities? A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. Higher breaking capacity (e.g., 150A in the 219XA or 200A in TSC-4A) does not affect substitution validity for standard 4A 250V applications. It provides additional safety margin in high-fault-current environments.

Q: Are SCHURTER and OptiFuse parts direct replacements? A: Yes. The SCHURTER FST series and OptiFuse TSC/TSD series maintain matching electrical ratings and physical dimensions. They are functionally equivalent and can be used interchangeably in applications designed for 4A 250V slow-blow cartridge fuses.

Q: What certifications should I verify for my application? A: The main part carries CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE approvals. Substitute parts carry varying certification sets. Verify that the selected substitute meets the specific regulatory requirements for your target market and application.

Q: Does the 5x20mm dimension apply to all substitutes? A: Yes. All listed parts use the 5x20mm form factor and require a compatible holder. Physical interchangeability is guaranteed across all substitutes.

Q: What is the operating temperature range? A: All parts operate across -55°C to 125°C, ensuring compatibility in standard industrial and consumer applications.

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