Equivalent & Substitute Parts for 021901.6TXAP

Part Overview

The 021901.6TXAP is a 1.6 A, 250 V AC/DC glass cartridge fuse manufactured by Littelfuse Inc., designed for 5mm x 20mm holder applications. This slow-blow fuse is part of the 219XA series and holds active product status. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and functional characteristics align with the original specification, enabling direct replacement in applications where component availability or supply chain requirements necessitate alternative sourcing.

Key Parameters

Parameter	Value
Current Rating	1.6 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of the following parameters:

Current Rating: 1.6 A (exact match required)
Voltage Rating: 250 V AC (exact match required)
Fuse Type: Cartridge, Glass (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)
Operating Temperature Range: -55°C to 125°C (exact match required)

All substitute parts listed below meet these core electrical and mechanical criteria. Variations in Breaking Capacity, Melting I²t, DC Cold Resistance, and approval agency certifications do not preclude substitution when the above parameters are identical.

Parameter Comparison

Part Number	Manufacturer	Series	Current (A)	Voltage (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ω)	Inventory (Pcs)
021901.6TXAP	Littelfuse Inc.	219XA	1.6	250	Slow Blow	5mm x 20mm	150	44.2	0.0551	960
021301.6MXP	Littelfuse Inc.	213	1.6	250	Slow Blow	5mm x 20mm	35	44.2	0.0551	1001
021301.6TXP	Littelfuse Inc.	213	1.6	250	Slow Blow	5mm x 20mm	35	44.2	0.0551	904
021801.6HXP	Littelfuse Inc.	218	1.6	250	Slow Blow	5mm x 20mm	35	23.35	0.0336	1213
021801.6MXP	Littelfuse Inc.	218	1.6	250	Slow Blow	5mm x 20mm	35	23.35	0.0336	2622
021801.6TXP	Littelfuse Inc.	218	1.6	250	Slow Blow	5mm x 20mm	35	23.35	0.0336	704
021901.6MXABP	Littelfuse Inc.	219XA	1.6	250	Slow Blow	5mm x 20mm	150	44.2	0.0551	2757
021901.6MXAP	Littelfuse Inc.	219XA	1.6	250	Slow Blow	5mm x 20mm	150	44.2	0.0551	2200
023901.6HXP	Littelfuse Inc.	239	1.6	250	Slow Blow	5mm x 20mm	100	30.43	0.1205	2100
023901.6MXP	Littelfuse Inc.	239	1.6	250	Slow Blow	5mm x 20mm	100	30.43	0.1205	5626
061801.6MXP	Littelfuse Inc.	618	1.6	250	Slow Blow	5mm x 20mm	35	23.35	0.0336	10400

Engineering Selection Recommendations

All listed substitute parts maintain identical electrical ratings (1.6 A, 250 V AC), fuse type (cartridge, glass), response characteristic (slow blow), and mechanical form factor (5mm x 20mm). Selection among substitutes should be based on:

Series 219XA (021901.6TXAP, 021901.6MXABP, 021901.6MXAP): Breaking capacity of 150 A, melting I²t of 44.2, and DC cold resistance of 0.0551 Ω. All three parts are ROHS3 compliant with active product status and identical approval agency certifications (CCC, CE, CSA, PSE, SEMKO, UL, VDE).

Series 213 (021301.6MXP, 021301.6TXP): Breaking capacity of 35 A, melting I²t of 44.2, and DC cold resistance of 0.0551 Ω. Both parts are ROHS3 compliant with active product status. Approval agencies include BSI, CCC, CE, CSA, PSE, SEMKO, UR, and VDE.

Series 218 (021801.6HXP, 021801.6MXP, 021801.6TXP): Breaking capacity of 35 A, melting I²t of 23.35, and DC cold resistance of 0.0336 Ω. All three parts are ROHS3 compliant with active product status. Approval agencies include CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, and VDE.

Series 239 (023901.6HXP, 023901.6MXP): Breaking capacity of 100 A, melting I²t of 30.43, and DC cold resistance of 0.1205 Ω. Both parts are ROHS3 compliant with active product status. Approval agencies include CE, CSA, KC, PSE, and UL.

Series 618 (061801.6MXP): Breaking capacity of 35 A, melting I²t of 23.35, and DC cold resistance of 0.0336 Ω. ROHS3 compliant with active product status. Approval agencies include CCC, CE, CSA, UR, and VDE. Highest inventory availability at 10,400 pieces.

Frequently Asked Questions (FAQ)

Q: Can 021901.6TXAP be replaced with any of the listed substitute parts?

A: Yes. All listed parts meet the core substitution criteria: 1.6 A current rating, 250 V AC voltage rating, slow-blow response, cartridge glass fuse type, and 5mm x 20mm package dimensions. Physical installation and electrical function are equivalent.

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

A: Series 219XA (021901.6TXAP, 021901.6MXABP, 021901.6MXAP) has a breaking capacity of 150 A and melting I²t of 44.2. Series 218 (021801.6HXP, 021801.6MXP, 021801.6TXP) has a breaking capacity of 35 A and melting I²t of 23.35. Both series are electrically equivalent for 1.6 A, 250 V applications but differ in fault current handling capability.

Q: Does DC cold resistance variation affect substitution compatibility?

A: DC cold resistance is a measured characteristic that does not prevent substitution. Parts with different DC cold resistance values (ranging from 0.0336 Ω to 0.1205 Ω across the listed substitutes) remain functionally equivalent for the specified 1.6 A, 250 V AC/DC application.

Q: Which substitute part has the highest inventory availability?

A: Series 618 part 061801.6MXP has the highest inventory at 10,400 pieces. Series 219XA part 021901.6MXABP has 2,757 pieces available.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status.

Q: What approval agencies are common across all substitute parts?

A: CE and CSA certifications are present across all substitute parts. CCC, PSE, and VDE certifications are present in most but not all parts. Specific application requirements may necessitate selection based on required approval agency certifications.

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