Littelfuse 0219.200TXAP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0219.200TXAP is a 200 mA, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor. This fuse requires a holder for installation and is designed for circuit protection applications requiring slow-blow response characteristics. The part is active in production with 958 units currently in stock. Alternative equivalent parts may be required due to supply availability, series discontinuation, or specific application compliance requirements.

Key Parameters

Parameter	Value
Current Rating	200 mA
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Glass
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0219.200TXAP is determined by the following critical parameters:

Current Rating: 200 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these core electrical and mechanical requirements. Variations in Breaking Capacity, Melting I²t, DC Cold Resistance, and approval agencies are permitted within the scope of equivalent substitution, as these parameters do not affect basic form-fit-function compatibility in standard circuit protection applications.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage (AC)	Response Time	Package	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Inventory (Pcs)
0219.200TXAP	Littelfuse Inc.	219XA	200 mA	250 V	Slow Blow	5mm x 20mm	150 A	0.32	1.6	958
0218.200HXP	Littelfuse Inc.	218	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.341	1.6	2343
0218.200MXP	Littelfuse Inc.	218	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.341	1.6	3993
0219.200MXAP	Littelfuse Inc.	219XA	200 mA	250 V	Slow Blow	5mm x 20mm	150 A	0.32	1.6	2418
0239.200HXP	Littelfuse Inc.	239	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.165	3.8725	1578
0239.200MXP	Littelfuse Inc.	239	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.165	3.8725	2167
0034.3110	SCHURTER Inc.	FST 5x20	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.256	Not Specified	2290
0034.5610.11	SCHURTER Inc.	SMD-FST	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.256	Not Specified	1028
TSD-200MA	OptiFuse	TSD	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.1628	Not Specified	1691

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and meet the core electrical and mechanical specifications of the 0219.200TXAP. Selection among equivalents should be based on the following factors:

Littelfuse 219XA Series (0219.200TXAP, 0219.200MXAP): These parts share identical series designation and electrical characteristics, including 150 A breaking capacity and 0.32 Melting I²t. Both carry comprehensive approval certifications (CCC, CE, CSA, SEMKO, UL, VDE). The 0219.200MXAP offers higher inventory availability (2418 units) compared to the primary part.

Littelfuse 218 Series (0218.200HXP, 0218.200MXP): These parts provide equivalent electrical performance with 35 A breaking capacity and 0.341 Melting I²t. Both include K-MARK certification in addition to standard approvals. The 0218.200MXP has the highest inventory level (3993 units) among all substitutes.

Littelfuse 239 Series (0239.200HXP, 0239.200MXP): These parts feature lower Melting I²t (0.165) and higher DC Cold Resistance (3.8725 Ohms). Approval agencies differ (CE, CSA, KC, UL), excluding CCC and VDE certifications. These parts are suitable only when application compliance requirements align with the specified approval set.

SCHURTER FST Series (0034.3110, 0034.5610.11): Both SCHURTER parts meet core specifications with 35 A breaking capacity and 0.256 Melting I²t. Approval coverage is limited (CCC/cURus/VDE for 0034.3110; cURus/VDE for 0034.5610.11). The 0034.3110 offers higher inventory (2290 units).

OptiFuse TSD Series (TSD-200MA): This part meets all core specifications with the lowest Melting I²t (0.1628). Approval is limited to IEC 60127 standard. HTSUS code differs (8535.10.0040 vs. 8536.10.0020), which may affect tariff classification in certain jurisdictions.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 0219.200TXAP with any of the listed parts?

A: Yes, all listed parts are parametric equivalents meeting the core requirements: 200 mA current rating, 250 V AC voltage rating, slow-blow response, 5mm x 20mm package, and cartridge glass fuse type. Physical form-fit-function compatibility is guaranteed. Verify that application compliance requirements align with the specific approval certifications of the selected substitute.

Q: What is the difference between the 219XA and 218 series fuses?

A: Both series meet the electrical specifications of the 0219.200TXAP. The primary difference is Breaking Capacity: 219XA series (150 A) versus 218 series (35 A). The 219XA series also carries CCC and VDE certifications, while the 218 series adds K-MARK certification. Select based on application breaking capacity requirements and required compliance certifications.

Q: Why do some substitute parts have different Melting I²t values?

A: Melting I²t is a thermal characteristic that affects the fuse's response to transient overcurrent conditions. While all listed parts are slow-blow fuses with identical current and voltage ratings, variations in Melting I²t reflect design differences between manufacturers and series. These variations are acceptable for equivalent substitution provided the application does not require a specific Melting I²t value.

Q: Are the SCHURTER and OptiFuse parts direct replacements?

A: Yes, SCHURTER (0034.3110, 0034.5610.11) and OptiFuse (TSD-200MA) parts are direct mechanical and electrical replacements. All meet the 200 mA, 250 V, 5mm x 20mm specifications. Verify that the approval certifications of the selected part satisfy application compliance requirements, as these differ from Littelfuse parts.

Q: Does DC Cold Resistance affect fuse selection?

A: DC Cold Resistance is a measured characteristic but does not determine substitution eligibility for standard circuit protection applications. The 0219.200TXAP and most substitutes have 1.6 Ohms resistance. The 0239 series parts have higher resistance (3.8725 Ohms). Select based on application requirements; if DC cold resistance is critical to circuit performance, verify compatibility before substitution.

Q: What is the difference between the 0034.3110 and 0034.5610.11 SCHURTER parts?

A: Both parts meet identical electrical specifications (200 mA, 250 V, 5mm x 20mm, 35 A breaking capacity, 0.256 Melting I²t). The 0034.5610.11 is designated as SMD-FST series with a base product number of 0034.5610, while the 0034.3110 is FST 5x20 series. Approval certifications differ slightly (0034.3110 includes CCC; 0034.5610.11 does not). The 0034.3110 has higher inventory availability (2290 vs. 1028 units).

Q: Can I use the OptiFuse TSD-200MA if my application requires CCC or VDE certification?

A: No. The TSD-200MA is certified only to IEC 60127 standard and does not carry CCC or VDE certifications. If your application requires these specific certifications, select from Littelfuse or SCHURTER parts that include them in their approval agency list.

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